Area Forecast Discussion
Issued by NWS Grand Forks, ND
Issued by NWS Grand Forks, ND
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003 FXUS63 KFGF 161757 AFDFGF Area Forecast Discussion National Weather Service Grand Forks ND Issued by National Weather Service Bismarck ND 1257 PM CDT Thu May 16 2024 .KEY MESSAGES... - Low to mid clouds to linger through the morning. Temperatures warming into the 60s and 70s this afternoon, with a few scattered showers and thunderstorms this afternoon through the evening. - Impacts possible Friday. Isolated strong to severe thunderstorms are possible Friday afternoon and evening. Damaging wind gusts are the main concern, but hail up to 1 inch in diameter cannot be ruled out. && .UPDATE... Issued at 1255 PM CDT Thu May 16 2024 Low to mid level clouds continue to linger, mainly in Minnesota and the Red River Valley. These should push out of North Dakota shortly, but may linger in northwestern Minnesota through much of the afternoon. Warming temperatures then look to be found after clouds clear. Look for 60s and 70s as high temperatures today. CAMs continue to shower an isolated shower or thunderstorm through this evening across eastern ND, then a broad line of showers tonight into Friday morning from west to east across the CWA. Add mention of thunderstorms into the HWO, although these storms through tonight are not expected to be severe. && .DISCUSSION... Issued at 415 AM CDT Thu May 16 2024 Today into tonight: Patchy morning fog will remain possible through around mid morning where we see the best clearing. Thus far, this has been limited to the Devils Lake Basin and a few areas along the International Border. Look for at least partial clearing through much of the day across the area as we will be between two upper lows. The resultant shortwave ridge will allow temperatures to recover well into the 70s today west of the Red River, and mid to upper 60s to the east. Scattered showers and thunderstorms are possible later this afternoon, mainly west of the Red River. Friday morning through midday: Our next chance for showers and thunderstorms will be on Friday as another shortwave moves across the area. Several short range ensemble members develop a weak, pre-frontal trough early Friday morning, which will bring a slight chance for scattered showers during the pre dawn hours. This is expected to clear after sunrise, with a strong rebound in temperatures expected through early afternoon. Highs are expected to reach well into the 80s, with a 90 degree reading or two possible for portions of the far southern Red River Valley. This will be in response to a retreating shortwave trough and the resultant WAA ahead of our next upper low. Impacts possible Friday Afternoon: Looking into the afternoon and evening hours, instability increases, with CAPE values climbing into the range of 1200 to 2000 J/Kg. Soundings favor the potential for relatively strong updrafts with multicell clusters or perhaps hybrid supercells, followed by potentially rapid upscale growth. With dew points in the 50s to near 60 degrees and temperatures in the 80s, this leaves us with an inverted V sounding, and resultant DCAPE values of 1000 J/kg or higher, thus damaging wind gusts will be the primary risk with any of the stronger updrafts that form. Hail is possible, but will have a somewhat narrow window during the mid afternoon. Forcing will occur along a strong theta-e gradient boundary and the associated cold front to follow. Low to mid level shear in the 0-3 km layer will be in the range of 15 to 30 knots, with an favorable orientation for a mention of possible QLCS formation. For the weekend and into next week: Much cooler temperatures are expected in a post frontal environment. Lingering showers and thunderstorms are possible through around midday Saturday as zonal flow takes over across the Northern Plains. This will be relatively short lived in this progressive setup, and another shortwave is expected to impact the region starting Sunday afternoon. Early indications show another chance for showers and thunderstorms, with a few stronger storms not out of the question. Progressive flow brings several more shortwaves across the area Monday through Wednesday, with a large degree of temporal and spatial variation at this time. && .AVIATION /18Z TAFS THROUGH 18Z FRIDAY/... Issued at 1255 PM CDT Thu May 16 2024 MVFR to IFR clouds continue to linger across northwestern Minnesota, with VFR conditions slowly returning to eastern North Dakota. Anywhere with lingering low clouds early this afternoon will see a gradual transition to VFR by mid to late afternoon. VFR conditions are then expected tonight into Friday morning. A few showers or thunderstorms are possible to most TAF sites this evening through tonight. Confidence was only high enough to place in VCSH in TAFs at this time. Light winds today will become a steady southerly wind tonight into Friday. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None. && $$ UPDATE...Anglin DISCUSSION...Lynch AVIATION...Anglin