


Area Forecast Discussion
Issued by NWS Grand Forks, ND
Issued by NWS Grand Forks, ND
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782 FXUS63 KFGF 301905 AFDFGF Area Forecast Discussion National Weather Service Grand Forks ND 205 PM CDT Mon Jun 30 2025 .KEY MESSAGES... - Scattered thunderstorms are expected this afternoon. Lightning and hail to the size of pennies would be the main threats with stronger storms. - Severe thunderstorm chances return Independence Day (Friday) into next weekend to parts of the region. && .DISCUSSION... Issued at 205 PM CDT Mon Jun 30 2025 ...Synopsis... Northwest flow prevails today through Wednesday, with H5 ridging building into the area late Wednesday into Thursday. A trough continues to move from northwest to southeast this afternoon, allowing isolated showers and thunderstorms to develop, mainly east of the Red River. Precipitation has been rather brief, but moderately heavy in locations where development occurs. Heading into Tuesday, precipitation chances will be minimal, with only a slight chance of scattered showers and storms along the International Border during the late morning through late afternoon. Another shortwave rapidly traverses the area on Wednesday ahead of H5 ridging. This will allow moisture return into the area late Wednesday through Thursday and into Friday, the 4th of July. Another system is expected to form and bring a chance for strong to severe storms to portions of the area on the 4th; however, timing and spatial extend remain low confidence. Active weather is expected to persist into the weekend and early part of next week as shortwaves continue to traverse the upper extent of a flattening H5 ridge. ...Scattered Storms this Afternoon... For this afternoon, isolated shower and thunderstorm activity will largely be driven by daytime heating and good low level lapse rates. Mid level shear and lapse rates are not supportive of organized storms, with instability also relatively low, generally ranging from 900 to 1200 J/Kg of SBCAPE. Most of the observed storms this afternoon have been rather short-lived, and low impact. ...Chance of Severe Storms from July 4th and the Weekend... H5 ridging works slowly east Thursday into Friday with moisture levels increasing ahead of an approaching shortwave. MLCAPE is ranging from 2000 to 3000 J/Kg; however, current model soundings indicate a shear profile that is slightly displaced from the better forcing along the front. It is worth noting that timing is very uncertain, with ensemble members trending a bit slower in recent model runs. This would line the shear up a bit better and bring the front through during the late afternoon, thus increasing the chance for severe storms as long as the cap is able to break. The later scenario also supports slightly larger MLCAPE that could exceed 3000 J/Kg. The shortwave timing will ultimately determine potential impacts; however, all scenarios bring a chance for at least isolated strong to severe thunderstorms Friday and possibly into Saturday. && .AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1225 PM CDT Mon Jun 30 2025 MVFR conditions prevail at KBJI and KTVF this afternoon with KFAR going between VFR and MVFR. Look for a continuation of this pattern through the remainder of the afternoon, with a few thunderstorms starting to develop through around sunset. Confidence in any one location or time is somewhat low, but there should be enough coverage to allow a mention of VCTS for sites in the Red River Valley as well as northwest Minnesota. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None. && $$ DISCUSSION...Lynch AVIATION...Lynch