805 FXUS63 KFGF 061723 AFDFGFArea Forecast Discussion National Weather Service Grand Forks ND 1223 PM CDT Mon Oct 6 2025
.KEY MESSAGES...
- Frost advisory and freeze warning impacts early Tuesday morning and early Wednesday morning over portions of eastern North Dakota and northwest Minnesota.
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.UPDATE... Issued at 1223 PM CDT Mon Oct 6 2025
The region continues to be in the warm sector (albeit the airmass is much cooler compared to last week) ahead of an approaching weak cold front from the north. At any rate, no impacts today.
UPDATE Issued at 855 AM CDT Mon Oct 6 2025
Temperatures will continue to warm (day time heating) and thus frost advisory/freeze warning allowed to expire at 9am. For today, region will be in the warm sector ahead of the next cold front tonight - minimal impacts today.
UPDATE Issued at 658 AM CDT Mon Oct 6 2025
Temp fall has about stopped with 30-33 degrees Devils Lake basin, away from the lake with mostly 36-39 in the Red River valley and a pocket of cooler temps near 32-34 Park Rapids and areas east of Detroit Lakes in the Osage Hills. Weak surface trough and wind shift from southwest to northwest/west is nearing Roseau, TRF and Fargo. Patches of mid level CU in NW MN with front otherwise clear behind front.
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.DISCUSSION... Issued at 253 AM CDT Mon Oct 6 2025
...Synopsis...
500 mb low is north of Churchill with trough into north central US. This will maintain itself thru Tuesday night before it shifts east and a short wave ridge builds north into central Canada and north central US. We have one weak surface trough noted moving into the RRV at 07z. Bands of mid clouds are with this as well, with a southwest wind turning northwest. Surface high is located near the Saskatchewan, Montana and North Dakota border where temps are in the low-mid 20s. This high drifts southeast today quickly. Briefly colder air moves into DVL basin with drier airmass and clearer sky moving in. Thus temps dropping to 32 and colder still possible in this area. Getting temps dropping to widespread 36 or colder farther east may be difficult. Not changing the warning/advisory as got several more hours.
Upstream short wave moving quickly southeast into east central Saskatchewan and west central Manitoba with clouds and light rain. This system moves well north of the area, but another surface trough passes thru overnight with a band of clouds. DLH wanted to add a low pop for a shower Lake of the Woods around 06z and did include as well. After this trough, colder air moves in with high pressure behind this trough a bit farther east than the current one, and is forecast to be in southwest Manitoba near 12z Tues. Thus anticipate a quick cool down with another potential/likely freeze for DVL region and frost temps farther east thru the mid and north RRV and NW MN. Overall temps likely to be colder Mon late night/Tues early than this morning.
High pressure over the area Tuesday and then slips southeast Tuesday night. Lightest winds Tues night over northern MN and would anticipate freeze Tues night in most of NW MN.
Handling these frost/freeze events individually at the present time, meaning nothing issued for this upcoming night/Tues early until the current headlines expire. Kept mentioning the frost in the grids thru the overnight/early AM thru early Wednesday based on forecast temps.
Milder air moves in mid to late week as upper ridge builds in Wed-Thu and trough moves into western Canada and the west coast, Global models drop upper low south along the west coast to off northern California Friday. Dry thru Friday. Then shower chances over the weekend will be determined on what happens to the western trough. Overall though models differ, they do show some sfc and upper system and front moving into the northern Plains later Saturday and Sunday with chance of showers increasing.
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.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1223 PM CDT Mon Oct 6 2025
VFR conditions through the period. Westerly low level flow through the evening into the overnight, with a weak cold front switching winds to more of a northerly direction by Tuesday morning (although winds remaining below 12 knots for the most part).
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.FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None.
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UPDATE...TG DISCUSSION...Riddle AVIATION...TG
NWS FGF Office Area Forecast Discussion