


Area Forecast Discussion
Issued by NWS Bismarck, ND
Issued by NWS Bismarck, ND
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122 FXUS63 KBIS 071929 AFDBIS Area Forecast Discussion National Weather Service Bismarck ND 229 PM CDT Mon Apr 7 2025 .KEY MESSAGES... - Chances (20 to 40 percent) for rain showers Tuesday and Wednesday. - Near critical fire weather conditions are possible across the southwest and south central Wednesday. - Windy conditions are expected both Wednesday and Thursday. - Above normal temperatures and breezy conditions favored for the second half of the week through the weekend, with the warmest temperatures expected Friday and Saturday. && .DISCUSSION... Issued at 228 PM CDT Mon Apr 7 2025 Across western and central North Dakota, we see clear skies, with some slightly breezy southeasterly winds, driven mostly by surface high pressure positioned to our northeast. Aloft, ridging is nudging into the west, with a substantial trough to our east across the Great Lakes. The strongest winds are across the west, with sustained 15-20 mph speeds expected, along with some gusts up to around 25 mph. As a result of the cold front last night, highs in the James River Valley and Turtle Mountains will remain in the mid 30s, while the far west will extend into the mid to upper 50s. Cooler temperatures will linger tonight, with lows ranging from the upper teens in the east to the mid 30s west. Tuesday sees the arrival of a weak shortwave, bringing about a chance (roughly 20 to 40 percent) for some light rain showers, moving quickly from west to east during the early morning and daytime hours. As the aforementioned surface high gets pushed off to the east, a weaker surface pressure gradient sets up across our area, helping keep winds a bit lower than today. Highs begin to increase a bit, in the mid 40s east to mid 60s west, while overnight lows generally remain just at or slightly above freezing. A more substantial trough will dig across the state Wednesday, bringing a second round of light rain showers. A bit of instability will be present, allowing for the potential for a few rumbles of thunder here and there. QPF remains rather low with these rain showers as well, which also leads to concerns with regards to fire weather. Northwesterly sustained winds around 25 to 30 mph will be present, strongest across the southwest, while relative humidity values range from 25 to 30 percent. As a result, near critical fire weather conditions will be present for much of the southwest and south central. If conditions continue to trend towards further deterioration, then we`ll need to evaluate concerns with regards to both fire weather and strong winds. Highs are generally expected to be in the 50s and lower 60s, with similar temperatures on Thursday. Thursday and Friday will be drier, as upper level ridging builds across the state. Daily breezy conditions are expected in the afternoon and evening during peak mixing hours. Relative humidities will also decrease substantially into the 20 to 25 percent range across much of the west, though generally, the strongest winds each day will be displaced from the lowest relative humidities. Near critical fire weather conditions are certainly a possibility. The axis of the mid-level thermal ridge will move through North Dakota Friday and Saturday, where highs may breach the 70 degree threshold across the south, with high 60s elsewhere. Long range guidance suggests a deep trough digging into the west by Sunday, bringing about the next few chances for rain, as well as slightly cooler temperatures. && .AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1229 PM CDT Mon Apr 7 2025 VFR conditions are present and will prevail through the forecast period. Some low stratus may persist across the southwest for another hour or so, but otherwise clear skies are present, with some cirrus across the central part of the state. There will be some southeasterly sustained winds around 15 kts across the west today, with gusts up to 25 kts, tapering off overnight. Otherwise, southeasterly winds around 10 kts is expected. High level clouds will begin moving into the west overnight, ahead of a weak shortwave. && .BIS WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...Besson AVIATION...Besson