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FNUS22 KWNS 151949

FWDDY2



Day 2 Fire Weather Outlook  

NWS Storm Prediction Center Norman OK

0249 PM CDT Thu May 15 2025



Valid 161200Z - 171200Z



A dry, post-frontal air mass will push through portions of the

Midwest this evening, priming northern Illinois for substantially

lower relative humidity for Friday. As a surface low moves into the

Great Lakes region along with accelerating mid-level winds, strong

surface winds of 20-25 mph from the south and southwest will develop

by late morning. The stronger winds combined with relative humidity

falling into the 20-25 percent range will support elevated fire

weather conditions across northern Illinois for Friday morning/early

afternoon. Fire weather threat remains conditional for the Chicago

area as line of showers and thunderstorms and subsequent rainfall

expected this afternoon/evening could limit fire spread potential

for Friday.



..Williams.. 05/15/2025



.PREV DISCUSSION... /ISSUED 0104 AM CDT Thu May 15 2025/



...Synopsis...

Fire-weather potential across the CONUS is relatively low Friday. In

the wake of the departing upper trough, shortwave ridging is

expected over the southern Plains and Southwest. This will

temporarily slow stronger mid-level flow as a Pacific front shifts

eastward. With only modest flow aloft and at the surface, strong

winds are not expected over the driest fuels of the Southwest.

However, warm temperatures and low RH below 20% will remain likely.

This could support some localized fire-weather risk where westerly

winds could gust to 15 mph closer to the terrain. Otherwise,

increasing surface moisture and recent rainfall will largely

preclude fire-weather concerns Friday outside of localized dry and

breezy conditions over parts of the Midwest. However, this is not

expected to be widespread.



...Please see www.spc.noaa.gov/fire for graphic product...



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