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#758320
Fri 21 Mar 2025 03:57:PM
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Joined: Feb 2001
Posts: 381,904
Launch Director
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OP
Launch Director
Joined: Feb 2001
Posts: 381,904 |
SPC Day 1 Fire Weather OutlookSPC Day 1 Fire Weather Outlook  Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1055 AM CDT Fri Mar 21 2025
Valid 211700Z - 221200Z
...Update... Elevated fire-weather conditions are expected across east-central NM later this afternoon, where sustained localized westerly downslope winds up to 20 to 25 mph will combine with RH in the low teens. ERC estimates and monthly percentiles across this region suggest fuels are receptive to ignition and spread. Only subtle adjustments to the forecast were made elsewhere, including a slight extension to the southeast for the Elevated area within NE and far northwest KS. Although widespread fuel conditions appear less receptive here, persistent breezy northwest downslope flow will aid in drier conditions/lower RH spreading into more of southwest NE this afternoon. In addition, the Elevated area for central TX was nudged slightly westward to account for some ongoing stronger southwesterly flow (expected to continue through early this afternoon), and was reduced across the TX panhandle where wind speeds should slowly decrease throughout the day. For additional details, please see the previous discussion below.
..Barnes/Williams.. 03/21/2025
.PREV DISCUSSION... /ISSUED 0210 AM CDT Fri Mar 21 2025/
...Synopsis... Elevated to critical fire-weather conditions are likely this afternoon and evening over parts of the central US. A shortwave trough within northwesterly flow will move from the central Rockies to the southern Plains. A weak surface low will shift eastward over the Midwest as a cold front moves south into the Plains. Gusty winds and low humidity are expected near the front, supporting widespread fire-weather concerns amidst dry fuels.
...Southern Plains... South of the surface low and ahead of the cold front, southerly flow is forecast to intensify over much of the southern Plains and parts of the central MS valley. Southerly gusts of 15-20 mph are likely through peak heating. The recent frontal intrusion into the Gulf has shunted the majority of appreciable moisture well offshore with low 30 dewpoints noted along the northwest Gulf coast. This will support continued dry return flow, with afternoon RH values of 20-25%, colocated with the strong gusts. Widespread elevated to locally critical fire-weather conditions appear likely over much of the southern Plains and central MS Valley, given the dry fuels and fire activity in recent days.
A more focused corridor of critical conditions is expected across north-central Texas early this afternoon. Stronger surface winds are expected along and behind the front with gusts of 20-25 mph likely. Along with the stronger gusts, strong diurnal heating and the dry return flow will favor lower RH below 20% atop dry fuels.
...Central High Plains... Northwesterly downslope flow is likely over portions of the central high Plains today and tonight as the upper trough and cold front move south. Elevated fire weather conditions are expected to be fairly widespread behind the front from the NE Panhandle southward into the High Plains. Downslope warming/drying should support RH values in the 15-25% range and widespread wind gusts of 15-25 mph. While area fuels are only partially supportive given recent rainfall/snow, enough dryness exists to support sufficient fire-weather risk to maintain the Elevated area.
...Florida... Offshore flow is likely over much of the Southeast today as surface high pressure builds over the central Gulf Coast. Northerly flow is likely over the Peninsula with a relatively dry air mass. While winds most of the day will be modest, occasional gusts of 10-15 mph may overlap with RH values below 30% and areas of dry fuels. This could support several hours of locally elevated fire-weather concerns given recent fire activity and little rainfall.
...Please see www.spc.noaa.gov/fire for graphic product...
Read morehttps://www.spc.noaa.gov/products/fire_wx/fwdy1.html
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