Storm Prediction Center Fire Weather Outlook - thorntonweather.com

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Updated: Sun, 25-Aug-2019 9:20am MDT

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Storm Prediction Center Fire Weather Outlook	Weather Advisories and Warnings National Wildland Fire Activity Map

Day 1 fire weather outlook and map Day 2 fire weather outlook and map
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0109 AM CDT Sun Aug 25 2019 Valid 251200Z - 261200Z ...CRITICAL FIRE WEATHER AREA FOR NORTHEAST NEVADA...SNAKE RIVER VALLEY...SOUTHERN WYOMING...NORTHEAST UTAH...NORTHWEST COLORADO... ...Synopsis... A strong mid-level jet will push into the central Rockies today, on the back side of a broad upper-level trough along the Canadian border. At the surface, a cold front will move across the Intermountain West. Boundary-layer mixing of stronger flow aloft along with a more stout surface pressure gradient than recent days will lead to critical fire weather conditions across portions of both the northern Great Basin and central Rockies. Winds of 20-25 mph will be common across the highlighted critical area. Potential for 25+ mph sustained winds, and higher gusts, will be maximized underneath the mid-level jet core in the Snake River Valley and southern Wyoming. Elevated conditions will occur surrounding the critical area as winds in these locations will either be lighter (15-20 mph) and/or fuels will be slightly less receptive to fire spread. All areas that have been highlighted can expect 10-15% RH during the afternoon. Only minor changes have been made from the previous forecast on account of the latest guidance. The critical area in northeast Nevada was expanded slightly westward and the elevated area was expanded to include more of central Colorado. ..Wendt.. 08/25/2019 ...Please see www.spc.noaa.gov/fire for graphic product... Day 2 Fire Weather Outlook Storm Prediction Center Norman OK 0200 AM CDT Sun Aug 25 2019 Valid 261200Z - 271200Z ...NO CRITICAL AREAS... ...Synopsis... Broad upper-level cyclonic flow will shift eastward into the northern Plains/upper-Midwest during the D2/Monday period. At the surface, high pressure will build into parts of the Pacific Northwest and northern Rockies with a thermally-induced pressure trough present across northern California. With mid-level winds waning across areas of dry fuels, as well as a generally weak surface pressure gradient across the northwestern quarter of the CONUS, fire weather concerns will be reduced below elevated levels in most locations. Locally elevated conditions will be most likely in portions of southern Wyoming and perhaps the Snake River Valley where some residual mid-level flow will exist. However, conditions are expected to be relatively brief and occur over areas with a general lack of fuels. With higher pressure over Montana and a pressure trough along the Oregon coast, portions of the Willamette Valley will see easterly downslope flow during the evening/overnight. RH values may dip to 30-35%. Based on available guidance, winds do not appear likely reach the sustained 15 mph threshold except on a localized basis. ..Wendt.. 08/25/2019 ...Please see www.spc.noaa.gov/fire for graphic product...
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