Area Forecast Discussion
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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989 FXUS65 KRIW 251647 AFDRIW Area Forecast Discussion National Weather Service Riverton WY 1047 AM MDT Wed Sep 25 2024 .KEY MESSAGES... - Well above normal temperatures today with breezy winds developing by the afternoon/evening. - Elevated to critical fire weather conditions will be possible Thursday as winds increase due to a nearing shortwave. - Warm, dry, and quiet conditions are likely to remain in place into the weekend with little to no chances for precipitation. && .DISCUSSION... Issued at 131 AM MDT Wed Sep 25 2024 Summer like weather returns today with warm, near record breaking temperatures 10 to 20 degrees above normal. Highs will be in the upper 80s to low 90s in areas east of the Divide and low to mid 80s west of the Divide. Skies remain mostly clear with quiet and dry conditions. Southwesterly winds will begin to increase during the afternoon/evening with gusts of 15 to 25 mph possible at times. Elevated to critical fire weather conditions will be a concern in parts of the CWA today due to the warm temperatures, low RH, and breezy winds. However, due to these winds and low RH values occurring at the same time for only a short period, no fire weather related highlights will be issued. Warm, dry, and quiet conditions are expected to prevail through the remainder of the week as high pressure builds in over the region. Wednesday will see a shortwave move across the PACNW, which will begin to tighten the pressure gradient for Thursday. The system is expected to remain too far north to bring any precipitation. However, winds are expected to increase as a result of the proximity of the system, with gusts of 20 to 30 mph possible at times during the afternoon/evening on Thursday. The strongest of winds will be across portions of Johnson, Natrona, Fremont, and Sweetwater Counties along with the wind corridor. Due to well above normal temperatures, gusty winds, and low RH values elevated to critical fire weather conditions may be possible for Thursday afternoon/evening. As of right now no highlights will be issued but the situation will need to be monitored. Ridging looks to persist across the region well into the weekend keeping any disturbances well to the north of the area. The next chance for precipitation does not look to arrive until the middle of next week but chances are looking slim with little agreement among models. If models do not end up changing its very likely we will see dry and warm conditions continue into the end of September. && .AVIATION /18Z TAFS THROUGH 18Z THURSDAY/... Issued at 1047 AM MDT Wed Sep 25 2024 High pressure will keep skies clear and conditions VFR through the TAF period. A weak trough will slide through the region Thursday, but it will be a very dry system, with almost no moisture or cloud cover as it passes by. Wind will be breezy this afternoon, as well as Thursday afternoon as the trough approaches/moves through. 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... None. && $$ DISCUSSION...Dziewaltowski AVIATION...Rowe