Area Forecast Discussion
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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386 FXUS65 KRIW 110354 AFDRIW Area Forecast Discussion National Weather Service Riverton WY 954 PM MDT Wed Jul 10 2024 .KEY MESSAGES... - Warming trend continues today with some isolated storms across the Winds and off the Absarokas. - Hottest temperatures to come Thursday through Sunday. - More seasonable with increasing precipitation chances early next week. && .DISCUSSION... Issued at 1222 PM MDT Wed Jul 10 2024 IR currently depicts mainly clear skies under an upper level high centered to the southwest. Some cooling cloud tops associated with a couple isolated weak storms over the Winds and off the Absarokas extending to the Owl Creeks throughout the afternoon. No impacts are expected at this time. Otherwise, warming trend continues today with a slight breeze at some locations 10-20 mph with no wind and limited fire weather threats going forward despite the increasing temperatures and lowering relative humidity values. The big story will be with the building ridge to the west with increasing convergence aloft fueling the weak upper level flow pattern and pulling up the desert heat. Near record heat is expected with some locations across the Wind River and Bighorn Basins possibly breaking some high temperature records. Models are still on track with this with H7 temperatures pushing into the low 20s C. 100 degree temperatures expected east of the Divide and 90s to the west through Sunday. As the bridge weakens and shifts east late weekend, a weak trough looks to skirt to the north that will bring a "reprieve" to the heat becoming more seasonable. Models are still not in great agreement on precipitation but higher elevations and northern counties should have the best chances for early to mid next week. Otherwise, longer term outlooks continue to have average precipitation and above average temperatures that even though it is July, it still out of the norm being this warm. && .AVIATION /06Z TAFS THROUGH 06Z FRIDAY/... Issued at 953 PM MDT Wed Jul 10 2024 West of the Divide...KBPI/KJAC/KPNA/KRKS Terminals Prevailing VFR conditions persist through the TAF period. Wind will increase by about mid-afternoon Thursday and decrease around sunset. Wind will be sustained in the low teens, with gusts around 20 knots. Skies will remain mostly clear, although mid-level scattered cumulus will develop in the afternoon. Thermals will be quite strong Thursday afternoon. East of the Divide...KCOD/KCPR/KLND/KRIW/KWRL Terminals Prevailing VFR conditions persist through the TAF period. Wind will increase by about mid-afternoon Thursday and decrease around sunset. Wind will be sustained in the low teens, with gusts around 20 knots. Another afternoon of isolated convection will occur Thursday on the periphery of the ridge as it takes its sweet time moving north and east. Lingering showers are possible (30%) into Thursday evening around KCPR. Similar to Wednesday numerous outflow boundaries are likely (70%) in the afternoon as downdrafts from convection develop. This will lead to gusty erratic wind at times through Thursday afternoon/into the evening hours. Thermals will be quite strong Thursday afternoon. Please see the Aviation Weather Center and/or CWSU ZDV and ZLC for the latest information on icing and turbulence forecasts. && .RIW WATCHES/WARNINGS/ADVISORIES... Heat Advisory from noon Thursday to 10 PM MDT Sunday for WYZ004>006-010-011-017-018-020. && $$ DISCUSSION...Lowe AVIATION...Rowe