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Area Forecast Discussion
Issued by NWS Twin Cities, MN
Issued by NWS Twin Cities, MN
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276 FXUS63 KMPX 142325 AFDMPX Area Forecast Discussion National Weather Service Twin Cities/Chanhassen MN 625 PM CDT Sun Jul 14 2024 .KEY MESSAGES... - Severe weather possible again late tonight into Monday afternoon. Damaging wind is the primary threat, followed by hail. The risk for tornadoes is low. - Looking ahead, cooler and drier weather remains on track for this coming week. && .DISCUSSION... Issued at 246 PM CDT Sun Jul 14 2024 TODAY THROUGH MONDAY...Early afternoon satellite imagery and surface obs showed mostly clear skies with light northerly winds across the region. Temperatures were seasonably warm, in the mid to upper 80s, but heat indices were were in the lower to mid 90s. Expect dry and summer-like weather the rest of the evening before the next system arrives later tonight. Later tonight, storms will fire across the Dakotas, and then move into western Minnesota after midnight. These storms should be on the downward trend, but then are expected to intensify or redevelop on Monday as the overall system moves toward the Ohio River Valley. As it stands now, most of the area will see the storms as their weakest point. We anticipate the storms to produce severe weather across the Dakotas, with a lingering severe wind threat as they approach western Minnesota early Monday morning. A few different scenarios could play out on Monday. The most likely scenario is that storms will weaken as they move into central Minnesota, and then strengthen as they approach southeast Minnesota, Wisconsin, and Iowa. If these storms develop a cold pool and move faster then the severe threat could continue from the Dakotas, across the region Monday morning. This faster solution would limit the potential for additional storms Monday afternoon. If the storms are slower, then the chance for storm development Monday afternoon increases, and so does the risk for severe weather. The Storm Prediction Center has an Enhanced Risk to the southeast where confidence is higher in severe weather. Meanwhile for our area, we`re kind of in the lull between the weakening storms tonight, and the developing storms tomorrow. This puts us in a lower-confidence forecast, so please continue to check back for updates. Damaging wind would be the primary threat, with hail a secondary threat. The risk for tornadoes is lower given the unfavorable low level shear profile. Heavy rain is also likely with these storms, but they should be moving fast enough to limit any flooding threat. TUESDAY THROUGH SATURDAY...No significant changes from the previous forecast. Northwest wind will bring cooler air across the region, and upper level subsidence will lead to surface high pressure and overall a drier weather pattern for the upcoming week. Humidity will be lower as well, with dewpoints in the 50s on Tuesday, with a few 40s possible on Wednesday. Highs will be in the mid 70s, with a slow warming trend back toward the 80s for later next week. && .AVIATION /00Z TAFS THROUGH 00Z MONDAY/... Issued at 625 PM CDT Sun Jul 14 2024 Outside of some diurnal cumulus lingering into the evening clear to mostly clear VFR skies this evening and most of tonight. Late tonight into Monday morning a line of thunderstorms will track across Minnesota and Wisconsin. How widespread these storms will be and at what exact time they arrive is still uncertain. So opted for PROB30 groups at each terminal when the storms are most likely to occur. Once storms form, later TAFs should be able to have the needed confidence to upgrade to TEMPO or prevailing. After the storms pass VFR will return with a lower, but still possible chance of storms for eastern MN and western WI terminals. In advance of the storms clear skies will allow for some fog to form, most likely at the Wisconsin terminals. KMSP... Continued VFR and light winds through the evening and into tonight. Any fog should remain in the river valleys and not at the air field. Main concern continues to be the chance for another round of thunderstorms Monday morning. These storms are trending later and could now impact the Monday morning rush. There is also a chance for some late Monday storms, but chances remain low and dependent on how the morning plays out. The later or stronger the morning storms are the less likely another round occurs later in the day. /OUTLOOK FOR KMSP/ TUE...VFR, Wind NW 5-15 kts. WED...VFR, Wind N 10-15 kts. THU...VFR, Wind VRB 0-5 kts. && .MPX WATCHES/WARNINGS/ADVISORIES... MN...None. WI...None. && $$ DISCUSSION...JRB AVIATION...NDC