


Area Forecast Discussion
Issued by NWS Bismarck, ND
Issued by NWS Bismarck, ND
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221 FXUS63 KBIS 010557 AFDBIS Area Forecast Discussion National Weather Service Bismarck ND 1257 AM CDT Tue Jul 1 2025 .KEY MESSAGES... - Low to medium chances for occasional showers or thunderstorms through Thursday afternoon. - Gradual warming trend through Thursday, with increasing humidity. - Medium to high chances for showers and thunderstorms Thursday night through Independence Day. && .UPDATE... Issued at 1257 AM CDT Tue Jul 1 2025 A quiet night continues across western and central North Dakota still. Ingested the newest NBM forecast. UPDATE Issued at 947 PM CDT Mon Jun 30 2025 A quiet evening continues across western and central North Dakota. Just blended in the latest observations to the going forecast. UPDATE Issued at 615 PM CDT Mon Jun 30 2025 The forecast should remain quiet through the evening across western and central North Dakota. The few fair weather cumulus clouds floating around will continue to diminish with the loss of daytime heating. && .DISCUSSION... Issued at 153 PM CDT Mon Jun 30 2025 Current surface analysis places low over Ontario with high over northeast Wyoming, bringing a northwesterly breeze to the area. Upper level analysis places trough over the Midwest with ridge over the northern Rockies. Very modest cyclonic flow over our area combined with daytime heating has resulted in widespread cumulus clouds over our area, with one very small compact shower noted over south central North Dakota. For the rest of today into this evening, mainly quiet weather expected with the northwest breeze eventually tapering off. A few weak showers and maybe a stray weak thunderstorm may develop primarily around the James River Valley this afternoon in the weak cyclonic flow, which would end by early evening. Upper ridge then gradually creeps over our area through mid- week. A few weak waves sliding through the ridge will bring occasional low shower/thunderstorm chances over parts of the area. The main story will be a gradual warming trend, with highs pushing into the 90s over parts of the area Wednesday, and across most of the area by Thursday. In addition, humidity will also be on the increase. On Thursday ridge axis slides to the east, with upper flow becoming southwest over our area. This will result in increasing chances for showers and thunderstorms Thursday night going into Independence Day. For the anticipated Thursday night storms, instability is expected to be elevated with plenty of moisture in place, but deep layer shear remains in question, which may be the limiting factor in severe potential, though some areas of heavy rain may become a concern given the moist atmosphere. An active pattern remains in place for Saturday into the start of the upcoming week, bringing daily low to medium chances for showers and thunderstorms. && .AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/... Issued at 1257 AM CDT Tue Jul 1 2025 VFR CIGs and VIS through the entire period. Light and variable winds tonight and into Tuesday morning. Wind directions will be different throughout the state, but should only be around 12kts. && .BIS WATCHES/WARNINGS/ADVISORIES... None. && $$ UPDATE...Smith DISCUSSION...JJS AVIATION...Smith