textproduct: Grand Forks
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Another round of showers is expected this afternoon through tonight, bringing an additional few hundredths to two tenths of an inch across mainly southeastern North Dakota into western Minnesota.
- Overnight temperatures could drop into the low to mid 30s west of the Red River Valley tonight, and a frost advisory is in effect. Temperatures drop again to near freezing across all of eastern North Dakota and western Minnesota Tuesday night.
..Temperatures into the 30s tonight
Continued cold air advection pushes 850mb and even 925mb temps in some areas down below 0 C tonight. While skies will remain cloudy and there will be at least a little bit of mixing from northwesterly winds, temperatures look quite cold by tomorrow morning. NBM has probabilities 80 percent and higher for temperatures to get below 36 degrees, and even the less bullish HREF has 40 to 50 percent. With the clouds and wind do not think we will get down as low as the base NBM had us, so tweaked lows up a bit. We should stay above 32, but even with not much actual frost occurring the 33 to 36 degree range west of the Red River Valley could cause some issues to sensitive plants. Went ahead and matched neighbors for a frost advisory tonight. It does look to clear out and go light for winds tomorrow night, so better chances for freeze and frost look likely Wednesday morning.
AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/
Issued at 631 PM CDT Mon May 18 2026
Light to moderate rain is moving across eastern ND and northwest MN and will transition east of the region through the late evening/overnight. Vis within areas of rain is generally 3-6sm, however brief drops under 3sm within some moderate showers may occur (better chances KFAR to BJI). MVFR ceilings are prevailing, and eventually IFR will overspread the region tonight, with gradual improvement west to east through the daytime period Tuesday. Better chances for VFR (3500-6000ft agl) ceilings will be late afternoon Tuesday.
North to northwest winds 12-20kt are expected across much of the region, with periodic gusts around 25kt.
FGF WATCHES/WARNINGS/ADVISORIES
ND...Frost Advisory from 1 AM to 9 AM CDT Tuesday for NDZ006-007- 014-015-024-026-028-029-038-049-052-054. MN...None.
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