921 FXUS63 KFGF 191502 AFDFGFArea Forecast Discussion National Weather Service Grand Forks ND 1002 AM CDT Fri Sep 19 2025
.KEY MESSAGES...
- Showers today, isolated t-storms possible. Additional 0.25 to 0.75 inch rainfall next 24 hours, then shower chances diminishing over the weekend. Dry next week.
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.UPDATE... Issued at 1002 AM CDT Fri Sep 19 2025
Adjusted POPs a bit for current radar trends as areas of rain and showers continue to rotate up from the south as low pressure continues to our southwest. Will remain across our area this morning before becoming a bit more showery this evening.
UPDATE Issued at 643 AM CDT Fri Sep 19 2025
More solid area of rain showers is moving north-northwest into the RRV as expected. So the high pops continue. Other showers with pockets of heavier rain into the Devils Lake basin and in north central MN. So idea of highest chc of rain this morning is indeed working out.
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.DISCUSSION... Issued at 304 AM CDT Fri Sep 19 2025
...Synopsis...
Forecast is progressing as anticipated early this morning. Upper low is in northwest SD with a 500 mb vort in western Missouri. Feed of deeper moisture extends from eastern Missouri northwest across Iowa into Minnesota and there is a 40 kt 700 mb jet involved as well. This feed of deeper moisture and mid level jet will aid in an increase in shower coverage thru the morning before diminishing this aftn. This is what was shown 24 hours ago with an increase in coverage of showers arriving late Thu night and lasting thru early Friday afternoon. Thus will maintain the categorical pops for most areas thru 18z then went close to model blend pops which shows chances of rain diminishing mid to late afternoon into this evening. Additional rain amounts 12z Fri to 12z Sat look to be in the 0.25 to 0.75 inch range. Isolated thunderstorms possible as well, but with main upper low forecast to drop more southeast thru today and tonight feel conditions less favorable for any funnels. Sfc low however is present in east central SD near Huron and this will be near the ND/SD/MN border by late today.
500 mb low and trough remains over Minnesota and eastern ND Saturday but moisture feed is much less into the system. But enough for continued scattered showers. Sunday will see upper wave shift a bit more east with showers limited to east of the Red River in MN then Monday will see clearing progress east thru the entire area.
A much needed prolonged dry period is in store from Monday thru Saturday across the area, as next in our series of upper lows this time develops over the central or southern Plains with flat upper ridge, 500 mb high heights, building north of upper low across the area and south central Canada.
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.AVIATION /12Z TAFS THROUGH 12Z SATURDAY/... Issued at 643 AM CDT Fri Sep 19 2025
Variable conditions today, though for most areas it should be IFR/low end MVFR in terms of vsby and cloud bases. Exceptions have remained in the immediate Red River valley where cloud bases have been higher. I would think there is a good chance of them lowering this morning. Mainly ENE wind 10 kts or less thru tonight.
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.FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None.
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UPDATE...Riddle/JR DISCUSSION...Riddle AVIATION...Riddle
NWS FGF Office Area Forecast Discussion