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September 2001

Descriptions and Weather outlooks:
Descriptions and outlooks taken from the National Fire News and Incident Management Situtation Reports .

Viewing Properties:

Tyros Satellite Data
September 30, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 29, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 28, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 27, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 26, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 25, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 24, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 23, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 22, 2001
National Preparedness Level 2

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Tyros Satellite Data
September 21, 2001
National Preparedness Level 2
No new large fires were reported nationwide. One large fire was contained in the Eastern Great Basin Area. Initial attack activity was moderate in the Northern  California Area. Very high to extreme fire indices were reported in California, Idaho, Montana, Nevada, Utah, Oregon and Washington.
In the Northern Rockies Area, north central Montana will have strong winds ahead of a strong building ridge of high pressure. Winds in excess of 40 mph are possible across the Rocky Mountain Front and adjacent plains. Temperatures will be in the 70s to mid 80s with minimum relative humidity at 0 to 20 percent. West of the Continental Divide, temperatures will be 70 to 80 with 80 to 90 in the central Idaho valleys.  A weak cold front moving over the Northwest Area will bring clouds and some light rain to the western Washington and northern Oregon coast but little change elsewhere. Temperatures will be in the upper 70s to mid 80s in the valleys east of the Cascades and up to 90 inland in southwest Oregon. Highs will be in the 60s and 70s in western Oregon and Washington.  A strong high pressure system aloft continues over the Northern California Area, bringing clear skies except for morning fog and low clouds along the coastal areas. Temperatures will be in the 80s to mid 90s inland and 60s to mid 70s near the coast.  A dry ridge of high pressure remains over the Eastern Great Basin Area bringing mostly sunny skies to the region. Temperatures will be in the 80s to lower 90s in the lower elevations of Utah, with 70s  to lower 80s in the mountains. In Idaho, temperatures will be in the 70s to mid 80s in the lower elevations, and 60s to 70s in the mountains.

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Tyros Satellite Data
September 20, 2001
National Preparedness Level 2
Four new large fires were reported, two in the Northwest Area, one in Northern California, and one in the Northern Rockies. Initial attack activity was light  nationwide. Very high to extreme fire indices were reported in California, Idaho, Montana, Nevada, Utah, Oregon and Washington.
An upper level disturbance will move over the Washington coast in the Northwest. High temperatures will be in the mid 70s to lower 80s in the valleys east of the Cascades and in southwest Oregon. The rest of the region will have high temperatures in the 60s and 70s. High pressure over Northern California will continue to bring sunny skies, except for morning fog and low clouds in coastal regions. High temperatures will be in the 60s along the coast, and in the 80s to mid 90s in the inland valleys. The Northern Rockies Area will have partly cloudy skies and diminishing winds. West of the continental divide, high temperatures will be 70 to 80, with 80 to 90 in the central Idaho valleys. Minimum relative humidity will be 20 to 30 percent, with 15 to 25 percent in the central Idaho valleys. Winds will be west at 5 to 15 mph. East of the continental divide, high temperatures will be in the 60s in the northern portions, and 65 to 75 in the south. A dry ridge of high pressure remains over the Eastern Great Basin bringing mostly sunny skies, except for isolated afternoon thunderstorms over southern Utah. High temperatures in Utah will be in the 80s to lower 90s in the lower elevations, with upper 60s to 70s in the mountains. Idaho will have high temperatures in the upper 70s to low 80s in the lower elevations and 60s in the mountains.

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Tyros Satellite Data
September 19, 2001
National Preparedness Level 2
One new large fire was reported in the Northwest Area. Initial attack activity was light in the Northern California and Northwest Areas. Very high to extreme fire indices were reported in California, Idaho, Montana, Nevada, Utah, Oregon and Washington.
High pressure and a dry westerly flow will dominate the Northwest. A weak upper level disturbance might cause a few showers in extreme northeast Washington. High temperatures will be in the 60s and 70s, with some readings in the 80s in southern Oregon.  High pressure over Northern California will bring sunny skies with morning fog and low clouds in coastal regions. High temperatures will be in the 60s along the coast, and in the 80s to mid 90s in the inland valleys.  A dry cold front will move through the Northern Rockies, bringing isolated mountain thunderstorms and gusty winds. West of the continental divide, high temperatures will be 65 to 75, with mid 80s in the valleys of northern Idaho.

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Tyros Satellite Data
September 17 2001
National Preparedness Level 2
Two new large fires were reported, one each in the Northwest and Northern California Areas. Two large fires reached containment in the Southern California Area. Initial attack activity was moderate in the Northern California and Northwest Areas. Very high to extreme indices were reported in Arizona, California, Idaho, Montana, Nevada, Oregon, Utah, Washington and Wyoming.
High pressure will be influencing the Northern California Area, bringing mostly sunny skies, except along the coastal areas where fog and low clouds can be expected. Temperatures will be in the 60s along the coast and 80s to lower 90s inland.  A dry westerly flow will be over the Southern California Area bringing mostly sunny skies to the region. Temperatures will be in the 70s near the coast and 90 to 105 inland.  In the Northwest Area, a drier and more stable west to northwest flow aloft will bring mostly sunny skies to the region. Temperatures will be in the 70s to 80s. A weak upper disturbance moving through southern Idaho will maintain a slight chance of thunderstorms in the southern portions of the Northern Rockies area, with high pressure building in the rest of the region. Temperatures will be in the 70s and 80s.

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Tyros Satellite Data
September 15, 2001
National Preparedness Level 2
One new large fire was reported in the Northwest Area. Initial attack activity was light nationwide. Very high to extreme indices were reported in Arizona, California, Idaho, Montana, Nevada, Oregon, Utah, Washington and Wyoming.
High pressure aloft continues over Washington while a low pressure system will bring the threat of showers and thunderstorms to much of eastern Oregon.  Temperatures will be in the 80s to near 90 over the valleys of Oregon and Washington and in the 70s along coastal areas.  A weak low pressure system aloft will drift toward Wyoming on Saturday. This system will have little overall effect on the Northern Rockies Area except to bring partly cloudy skies to the south. Temperatures will be in nthe 70s and 80s west of the divide and 60s and 70s east.A weak high pressure system with subtropical moisture in the Southern California Area, will bring scattered afternoon showers and thunderstorms to the mountains and deserts. Temperatures will be in the 70s near the coast, 80s and 90s inland, and 100 to 105 in the deserts. A moist and unstable air mass stationed over the Eastern Great Basin, will result in isolated thunderstorm activity across Utah and southwest Idaho. Temperatures will be 75 to 85 in the lower elevations, 60s in the mountains and 90s in southwest Utah.

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Tyros Satellite Data
September 14, 2001
National Preparedness Level 2

No new large fires were reported nationwide. One large fire reached containment in the Northern California Area. Initial attack activity was light nationwide. Very high to extreme indices were reported in Arizona, California, Colorado, Idaho, Montana, Nevada, Oregon, Texas, Utah and Wyoming.
A weak low pressure system in northern California will bring a slight chance of isolated showers to northwestern California. Temperatures will be in the 60s along the coast and 80s to 90s inland. A weak high pressure system with subtropical moisture located over Southern California, will bring a chance of scattered afternoon showers and thunderstorms to the region. Temperatures will be in the 70s along the coast, 80s to 90s inland, and 100 to 105 in the desert areas.  An upper level  low pressure system and associated Pacific frontal system will be moving out of the Eastern Great Basin area, bringing a drying trend to the region. Temperatures will be 70 to 80 in the lower elevations and 60s in the mountains.  A weak ridge of high pressure will move into Western Great Basin, bringing partly cloudy skies and dry conditions. Temperatures will be in the mid 70's to mid 80's in the north and central areas, and mid 80's to 105 in the south.  Northern Rockies will have scattered showers and thunderstorms over the region, with partly  cloudy skies and dry conditions west of the divide. High temperatures will be 75 to 85 west of the
divide, 85 to 95 in the Idaho valleys, and in the 50's elsewhere.

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Tyros Satellite Data
September 11, 2001
National Preparedness Level 3
Three new large fires were reported, one each in Northern Rockies, Eastern Great Basin and Northwest Areas. One large fire reached containment in the Northwest Area. Initial attack activity was  light nationwide. Very high to extreme indices were reported in Oregon, California, Idaho, Utah, Nevada, Arizona, Colorado, and Montana.
A low pressure trough will be nearing the coast of Northern California. This will bring clouds and a chance of showers and thunderstorms to the region. Temperatures will be 60 near the coast and mid 70s to 90 inland.  In Southern California, a low pressure trough will bring cooling and some clouds to the region, with a chance of thunderstorms over the Sierra’s. Temperatures will be in the 60s to 70s near the coast with 80s inland and 90s in the deserts.  High pressure continues to dominate the Pacific Northwest, with the exception of a weak upper level low pressure system influencing the extreme southern end of Oregon. Temperatures will remain in the 70s and 80s over most of the region, with a few 90 reading in southwest and eastern Oregon desert areas.  A weak southerly flow aloft will bring a slight increase in moisture over the Eastern Great Basin area. Weather conditions will be sunny, with a chance of isolated afternoon, mainly dry thunderstorms over the Utah mountains and near the Idaho-Nevada border. Temperatures in southern Idaho will be in the mid 70s to upper 80s in the lower elevations, with mid 60s to upper 70s in the mountains. Utah will see mainly 80s to mid 90s over the lower elevations, with 70s in the mountains.

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Tyros Satellite Data
September 10, 2001
National Preparedness Level 3
No new large fires were reported nationwide. Initial attack activity was light nationwide. Very high to extreme indices were reported in Oregon, California, Idaho, Utah, Nevada, Arizona, Colorado and Montana.
A low pressure trough off shore will begin moving toward the coast, bringing cooler air over the Northern California region. Weather conditions will be sunny, with some low clouds and fog along the coast. Temperatures will be mid 70s to 90 inland and near 60 along the coast. In the Southern California area, the weather will be sunny with some morning fog near the coast. Temperatures will be 95 to 105 inland and in the 70s to 80s near the coast.  A dry westerly flow aloft is influencing the Northern Rockies area. Temperatures will be mostly 65 to 75 locally and in the lower 80s at the lowest elevations.  A ridge of high pressure will continue to hold over the Eastern Great Basin and western Rockies, resulting in dry and warmer weather, with sunny skies. Temperatures will be in the upper 70s to near 90 over lower elevations with mid 60s to upper 70s in the mountains.

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Tyros Satellite Data
September 8, 2001
-No Situation Report Available-

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Tyros Satellite Data
September 7, 2001
National Preparedness Level 4
Four new large fires were reported, one each in the Rocky Mountain, Northern Rockies, Northern California and Southern California areas. Two large fires reached containment; one each in Eastern Great Basin and one in Western Great Basin areas. Initial attack activity was light nationwide.
High pressure will build over the Pacific Northwest will bring gradual warming and drying. Temperatures will be in the 70s to low 80s except 80 to 90 in southwestern Oregon and 95 near the coast.  A ridge of high pressure is building over the Northern California area with steep surface pressure gradients, causing moderate north to east winds. Weather conditions will be sunny, warm and windy. Temperatures will be in the 80s to high 90s inland and 60s along the coast.  A weak ridge of high pressure will build over the W est Coast bringing lighter winds, lower relative humidity and warmer temperatures to the Western Great Basin. Skies will be sunny with temperatures in the mid 70s to 80s in the north and central portions and mid 80s to105 in the south. A Canadian frontal system will bring more cold, windy and unsettled weather to the Northern Rockies. Scattered rain showers can be expected across much of Montana and North Dakota with some possible light snow showers over the higher mountains. North Idaho will be mostly dry. Temperatures will be 55 to 65 in the lower elevations and 45 to 55 in the mountains. In the Eastern Great Basin, isolated light rain and mountain snow showers over southeast Idaho and northern Utah can be expected, with dry conditions over the rest of the region. In northern Utah, temperatures will be in the 60s with 50s in the mountains. In southern Utah, the temperatures will be in the 80s to lower 90s with 70s to near 80 in the southern mountains. Idaho will see temperatures in the 60s to 70s in lower elevations with 55 to 65 in the mountains.
***A RED FLAG WARNING HAS BEEN ISSUED FOR OREGON’S SOUTHERN COASTAL MOUNTAINS FOR LOW RELATIVE HUMIDITY AND GUSTY NORTHEAST WINDS***
***A RED FLAG WARNING HAS BEEN ISSUED FOR THE NORTHERN SACRAMENTO VALLEY AND SURROUNDING FOOTHILLS PARTICULARLY THE EAST SIDE OF THE COAST RANGE, FOR VERY LOW RELATIVE HUMIDITY AND GUSTY WINDS***

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Tyros Satellite Data
September 6, 2001
National Preparedness Level 4
Two new large fires were reported in the Rocky Mountain area. Eight large fires reached containment; one in Northern Rockies, one in Eastern Great Basin, four in Rocky Mountain, one in Northwest, and one in Western Great Basin. Initial attack activity was light nationwide.
A strong frontal system moved across the Rocky Mountain Region yesterday bringing increasing moisture and much colder temperatures. There will be numerous showers with possible snow in the higher elevations over Wyoming. In Colorado, showers will increase in the north-central to northeast areas, with a chance of isolated mainly dry afternoon thunderstorms over the remainder of the state. High temperatures will be in the mid 50's to mid 60's over the lower elevations of Wyoming, with 40's in the mountains. Colorado and southeast Wyoming will have high temperatures in the mid 80's to lower 90's in the lower elevations, and 70's in the mountains.  Much colder air will cover the Northern Rockies today in the wake of a strong cold frontal passage. Scattered showers and isolated thunderstorms will occur across southern sections of the region today then will taper off this afternoon. Strong gusty north  winds are expected as well. High temperatures will be in the 60's to low 70's with 55 to 65 across southeast Montana.  In the Eastern Great Basin, a cold front continues to move through the region. There will be isolated showers and thunderstorms in southern Utah. Showers will be likely over northern Utah and southern Idaho. In northern Utah, snow levels will drop to 9000 feet. High temperatures in Utah will be 65 to 75, with 45 to 55 in the mountains. In Idaho, the high temperatures will be in the mid 50's to mid 60's, with 45 to 55 in the mountains.
***A FIRE WEATHER WATCH HAS BEEN POSTED IN NORTHWEST COLORADO FOR WINDS, WARM TEMPERATURES, A DRY UNSTABLE AIR MASS, AND POSSIBLE DRY LIGHTNING***

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Tyros Satellite Data
September 5, 2001
National Preparedness Level 4
Two new large fires were reported, one each in Eastern Great Basin and Western Great Basin areas. Four large fires reached containment; two in Northern Rockies, and one each in the Rocky Mountain and Northern California areas. Initial attack activity was light nationwide. Very high to extreme fire indices were reported in Arizona, California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington and Wyoming.
A cold front will move across the Western Great Basin this afternoon with strong gusty southwest to northwest winds. This will bring partly cloudy skies with a slight chance of thunderstorms in the north and central portions. High temperatures will be 75 to 85 in the north and central areas, and 90 to 100 in the south.  A weather system is strengthening off the Pacific northwest coast, causing upper level disturbances to move in a southwest flow across the Rocky Mountain Region. Thunderstorm potential should be highest over far western Wyoming, with isolated mainly dry thunderstorms over Colorado, central to eastern Wyoming, and western South Dakota. High temperatures will be in the mid 80's to mid 90's, with 70's in the mountains.    In the Eastern Great Basin, there will be increasing south to southwest winds and a few thunderstorms ahead of a strengthening Pacific weather system as it moves into western Idaho by the afternoon. This system will cause increasing clouds and winds with widely scattered showers and thunderstorms. Showers will be more numerous over western Idaho. In Utah, high temperatures will be 85 to 95, with 75 to 85 in the mountains. In Idaho, high temperatures will be 75 to 85, with 65 to 75 in the mountains.  In Northern Rockies, a cold front will move across northern Idaho and Montana during the day, bringing scattered showers and thunderstorms with cooler temperatures and gusty shifting winds. Some of the thunderstorms may be dry in south-central and southeastern Montana. High temperatures will be in the 80's to 90's prior to the front, and in the 70's to lower 80's behind the front. Minimum relative humidity will range from 25 to 40 percent in the west to 12 to 24 percent in the south and east. Southwest winds at 15 to 25 mph will shift to the northwest at 15 to 30 mph behind the front. A dry trough will pass through Northern California, bringing mostly sunny skies with strong southwest winds. High temperatures will be in the 60's along the coast, and low 80's to low 90's inland.

***A RED FLAG WARNING HAS BEEN POSTED IN NORTHERN AND CENTRAL PORTIONS OF NEVADA FOR STRONG WINDS AND LOW HUMIDITY***
***A RED FLAG WARNING HAS BEEN POSTED IN WESTERN SOUTH DAKOTA FOR ISOLATED DRY LIGHTNING, INCREASING WINDS, AN UNSTABLE AIR MASS, LOW RELATIVE HUMIDITY AND HIGH TEMPERATURES***
***A FIRE WEATHER WATCH HAS BEEN POSTED IN THE IDAHO UPPER SNAKE RIVER PLAIN FOR STRONG GUSTY WINDS IN THE AFTERNOON AND EVENING***
***A FIRE WEATHER WATCH HAS BEEN POSTED IN WESTERN AND CENTRAL UTAH FOR STRONG SOUTH TO SOUTHWEST WINDS, LOW RELATIVE HUMIDITY AND A HIGH HAINES INDEX***
***A FIRE WEATHER WATCH HAS BEEN POSTED IN WESTERN, CENTRAL AND NORTHEAST WYOMING FOR ISOLATED DRY LIGHTNING, INCREASING WINDS, AN UNSTABLE AIR MASS, LOW RELATIVE HUMIDITY AND HIGH TEMPERATURES***
***A FIRE WEATHER WATCH HAS BEEN POSTED IN SOUTH-CENTRAL AND SOUTHEASTERN MONTANA FOR WET AND DRY THUNDERSTORMS AND GUSTY WINDS ASSOCIATED WITH A COLD FRONTAL PASSAGE***
***A FIRE WEATHER WATCH HAS BEEN POSTED IN NORTHERN CALIFORNIA FOR AREAS EAST OF THE SIERRA-CASCADE CREST SOUTH OF THE MODOC NATIONAL FOREST (INCLUDING LASSEN AND FAR EASTERN PLUMAS NATIONAL FORESTS) FOR STRONG WINDS AND VERY LOW RELATIVE HUMIDITY***

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Tyros Satellite Data
September 4, 2001
National Preparedness Level 4
Five new large fires were reported, three in Northern Rockies, one each in Eastern Great Basin and Western Great Basin. Three large fires reached containment in the Northern Rockies Area. Initial attack activity was light nationwide. Very high to extreme fire indices were reported in Arizona, California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington and Wyoming.
An upper level disturbance and associated moisture from an old tropical storm will push over the high pressure ridge into Wyoming and western South Dakota. This will bring isolated to widely scattered thunderstorms over the Black Hills region, otherwise hot and dry conditions will prevail over the Rocky Mountain region. High temperatures will be in the mid 70's to lower 80's in the mountains, 85 to 95 at lower elevations and near 100 in the Black Hills region.  High pressure will remain over most of the Northern Rockies with partly cloudy skies and isolated late thunderstorms over southwest and south central Montana. High temperatures will be 80 to 95. A weak cold front will stall across western Washington and northwestern Oregon and a dry southwesterly flow will cover eastern Washington and most of Oregon. This will bring mostly sunny conditions except for morning clouds over western Washington and northwestern Oregon. High temperatures will be 65 to 80 west of the Cascades, and 78 to 93 east.  A dry southwest flow will move over northern California bringing sunny skies. High temperatures will be in mid 80's to upper 90's inland.
*** A FIRE WEATHER WATCH HAS BEEN POSTED IN NORTHEAST WYOMING AND WESTERN SOUTH DAKOTA FOR ISOLATED DRY LIGHTNING, LOW RELATIVE HUMIDITY, HIGH TEMPERATURES AND HIGH HAINES INDEX ***

Three new large fires were reported, one each in the Rocky Mountain, Eastern Great Basin and Northern Rockies areas. Three large fires met containment objectives, one each in the Eastern Great Basin, Western Great Basin and Northern Rockies areas. Initial attack activity was light nation wide. Very high to extreme fire danger was reported in Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Texas, Utah, Washington and Wyoming.
A dry cold front will move into the Northern Rockies area, resulting in windy conditions during the afternoon. Temperatures will be in the 70s and 80s, with 90s in the lower elevations.  An upper level ridge of high pressure begins to build over the Rocky Mountain area with some isolated, dry thunderstorms occurring over the Colorado mountains. Temperatures will be in the mid 70s to lower 80s in the mountains and 85 to 95 in the valleys.  Building high pressure over the Eastern Great Basin area results in a return of monsoonal moisture to Utah and continued dry conditions over Idaho. Temperatures will be 73 to 83 in the mountains and 85 to 95 in the lower elevations.  A dry westerly flow aloft will be over the Northern California area. Weather conditions will be mostly sunny, with temperatures in the lower 80s to mid 90s inland and in the 60s along the coast.
***A FIRE WEATHER WATCH HAS BEEN ISSUED IN THE NORTHERN ROCKIES AREA FOR STRONG, GUSTY WINDS AND LOW MINIMUM RELATIVE HUMIDITY***

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Tyros Satellite Data
September 1, 2001
National Preparedness Level 4
One new large fire was reported in the Northern California area.  Four large fires met containment objectives, one each in the Western Great Basin, Eastern Great Basin, Northwest and Northern California areas.  Initial attack activity was moderate in Northern California nad Eastern Great Basin areas and light elsewhere.  Very high to extreme fire danger was reported in Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Texas, Utah, Washington and Wyoming.
Another cold front will reach the Northern Rockies area Saturday afternoon.  Strong pressure gradients will develop ahead of the front, resulting in windy conditions.  Weather will be partly cloudy, with a chance of afternoon showers over Northwestern Montana and Northern Idaho.  Temperatures will be in the mid 70s to mid 80s.  Isolated afternoon and evening thunderstorms are expected in the Rocky Mountain area, mainly over the mountains of Colorado and southeast Wyoming.  Temperatures will be in the 70s in the mountains and 80s to 90s in the lower elevations. A dry westerly flow prevails over the Eastern Great Basin area as the main cold front remains north of the region.  Isolated thunderstorms over the mountains of Utah are expected, otherwise dry conditions will persist.  Temperatures will range from 85 to 100 in Utah, with mid 80s to 90s in Idaho.  Remnants of tropical storm Flossied, will bring a slight chance of afternoon thunderstorms to the Western Great Basin area.  Weather will be partly cloudy with isolated afternoon thunderstorms, mainly over the southern portions of the area.  Temperatures will be in the 80s to low 90s in the northern and central portions, with 90 to 105 in the southern portion.
***A FIRE WEATHER WATCH HAS BEEN POSTED IN THE NORTHERN ROCKIES FOR STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY***

Simulated Natural Color Images (Bands 1, 2 and 3):
Enhanced image of Western United States. NOAA 14,  6:44 p.m.

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