Administrators NorthGeorgiaWX Posted July 25 Administrators Share Posted July 25 SPC Day 1 Fire Weather Outlook Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1248 AM CDT Thu Jul 25 2024 Valid 251200Z - 261200Z ...Synopsis... Isolated dry thunderstorms are anticipated across portions of southern Idaho into southwestern Montana as an upper-level trough progresses eastward across the Northwest. Additionally, elevated fire-weather conditions are expected across the southern Cascades, portions of northern Montana, and the northern Great Plains. ...Pacific Northwest... As an upper-level trough is forecast to progress eastward out of the Pacific Northwest and into Montana, isolated dry thunderstorms are expected across southeastern Idaho and into southwestern Montana over receptive fuels. Some trimming of the previous forecast area, particularly over southwestern Idaho, was necessary after significant wetting rainfall occurred the previous day. Additionally, current forecast guidance suggests a mix of both wet and dry thunderstorms, precluding the introduction of a scattered dry thunder area despite widespread thunderstorm coverage. Forecast profiles across southwestern Montana show deep inverted-v boundary layers supportive of gusty thunderstorm outflow that could contribute to wildfire spread with both existing fires and new lightning ignitions. Elevated fire-weather conditions are expected to occur over the southern Cascades, especially where local gap flow enhanced winds could contribute to wildfire spread with existing fires. Some trimming of the previous forecast areas was necessary to account for wetting rainfall occurring the previous day, leaving fuels less receptive to ignition. Some elevated fire-weather conditions are also possible in portions of north-central Montana, but the overlap of stronger surface winds/low relative humidity and receptive fuels is somewhat narrow. ...Northern Great Plains... Elevated fire-weather conditions are anticipated, particularly along portions of western Montana and Wyoming, into eastern Nebraska and the Dakotas. Strong southerly flow, coupled with hot, dry boundary layer profiles, are expected to persist for much of the afternoon and into the evening. Fuels in this region will be at or exceed the 90th percentile for ERCs, but conditions are expected to remain below critical criteria for wind and relative humidity. ..Halbert/Lyons.. 07/25/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more View the full article Quote Link to comment Share on other sites More sharing options...
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