A funnel developed from a shower in western Yellow Medicine County.
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The episode as NWS MPX wrote it up.
A funnel developed from a shower in western Yellow Medicine County.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Twin Cities, MN wrote its last area forecast discussion before the first event at May 15, 1:04 PM CST, 26 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Twin Cities/Chanhassen MN 204 PM CDT Wed May 15 2024 .KEY MESSAGES... - Brief funnel clouds possible across southwestern Minnesota this afternoon. - A band of showers with a few rumbles of thunder will gradually drift from western Minnesota into western Wisconsin this afternoon through Thursday morning. Rainfall amounts of 0.25" or less expected. - Dry to end the work week, followed by the chance for scattered showers and storms on Saturday. && .DISCUSSION... Issued at 155 PM CDT Wed May 15 2024 Early afternoon satellite imagery illustrates clouds expanding to the east across the region, tied to the advance of a surface low spinning through eastern South Dakota. MPX Radar imagery captured an initial band of echoes across western Minnesota earlier today, but surface observations reveal that little if any precipitation was able to reach the surface given notable dry air throughout the column. Better support for precipitation will arrive this afternoon, as a shortwave located within the upper flow advances across the Upper Midwest. The forcing associated with this wave will be recognized by way of a cold front, which is forecast to slowly move across Minnesota and western Wisconsin starting this afternoon and continuing into tomorrow morning. Regional MRMS picture depicts the first showers developing along the South Dakota/Minnesota state border at this hour. CAMs are in fairly solid agreement with the timing of the narrow band of rain showers, such that our PoP timing reflects the highest PoPs (80-90%) across western Minnesota this afternoon, moving across I-35/Twin Cities Metro by late evening, and eventually wrapping up across western Wisconsin by mid-morning Thursday. We can't rule out some thunder, especially across southwest Minnesota where a few hundred joules of CAPE are present on forecast soundings. Additionally, we will have to watch for the potential for funnel clouds/perhaps a quick spin-up with the initial convection this afternoon, given ample surface vorticity co-located with an axis of 0-3km CAPE per SPC mesoanalysis. Rainfall amounts of 0.25" or less are expected for most locations, with slight chance that a few spots observe higher amounts due to convective nature of the rainfall. The last of the showers will depart western Wisconsin by midday tomorrow, which will open the door for a dry end to the work week. Little change in the airmass will allow for highs to climb into the low 70s tomorrow afternoon. Our focus will shift back to the northwest on Friday, as an upper low is forecast to take shape across southern Canada. Synoptic scale warm advection will increase across the Upper Midwest ahead of this system, which will warm temperatures well above normal heading into the weekend. Friday's highs are forecast to climb into the to a developing upper low across southern Canada low to mid 80s for much of the region and it's conceivable that locations in western Minnesota make a run towards 90 degrees. As the upper low transitions east Saturday, a cold front will swoop across the region. Scattered showers and a few thunderstorms appear possible with this frontal passage. Forecast soundings show a capping inversion present across south/west portions of the area Saturday morning, with less capping (later in the diurnal curve) across eastern Minnesota and western Wisconsin during the afternoon and evening. For this reason, the highest PoPs (40-60%) exist for locations along and east of I-35. Temperatures will cool back to the 70s following the passage of this storm system. As mentioned by the midnight shift, the pattern from early next week onward will be dominated broad southwest flow aloft, such that the main storm track appears to setup south of Minnesota/Wisconsin. We have maintained slight chance PoPs for several days next week, as it is possible that portions of the area (mainly south) may be "brushed" by the passing disturbances. Global ensembles feature a northward shift in the general storm track by the end of next week, which may result in the return of more widespread rain chances towards the end of the extended forecast. && .AVIATION /12Z TAFS THROUGH 12Z THURSDAY/... Issued at 1153 AM CDT Wed May 15 2024 A band of scattered to continuous rain showers will move into western MN later this afternoon and slowly continue east- northeast into eastern MN by late this evening, and western WI by early Thursday morning. These showers should be light enough for impacts to terminals not to be realized, except at RWF where non-zero instability could lead to a thunderstorm or two from 23-02Z. The main impact will be cigs lowering with the building clouds, with large-scale low-end VFR to MVFR expected at most terminals thru the end of the period. However, AXN has a good chance of dropping to IFR overnight tonight into Thursday morning with its proximity to the surface low. Cigs should slowly improve towards the end of the period. Southeasterly winds will eventually turn clockwise to west-northwesterly overnight as the cold frontal passage occurs. Aside from western MN where winds and gusts will be 3-5 knots greater this afternoon, winds should be at or just below 10 knots the entire period. KMSP...The best timing for -SHRA continues to look like 03-08Z. Forecast soundings also have kept with very low instability, signaling a low likelihood of TS. Thus, have kept TS out of the TAF. Periods of MVFR cigs (down to 1500 feet) also look possible after 06Z but confidence is too low to include at this time. /OUTLOOK FOR KMSP/ FRI...VFR. Wind SE 10-15kts. SAT...VFR, chc MVFR/-TSRA. Winds SE becmng W 15-20G30kts. SUN...VFR. Wind W 10-15kts && .MPX WATCHES/WARNINGS/ADVISORIES... MN...None. WI...None. && DISCUSSION...Strus AVIATION...CTG
Hazardous Weather Outlook National Weather Service Twin Cities/Chanhassen MN 124 PM CDT Wed May 15 2024 MNZ041-047-048-054>057-064-065-073-161830- Douglas-Stevens-Pope-Lac Qui Parle-Swift-Chippewa-Kandiyohi- Yellow Medicine-Renville-Redwood- 124 PM CDT Wed May 15 2024 This Hazardous Weather Outlook is for portions of central Minnesota...southwest Minnesota and west central Minnesota. .DAY ONE...This Afternoon and Tonight. One or two funnel clouds or weak landspouts are possible with any stronger rain showers. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... SKYWARN spotter activation will not be needed. MNZ042>045-049>053-058>063-066>070-074>078-082>085-091>093- WIZ014>016-023>028-161830- Todd-Morrison-Mille Lacs-Kanabec-Stearns-Benton-Sherburne-Isanti- Chisago-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-McLeod- Sibley-Carver-Scott-Dakota-Brown-Nicollet-Le Sueur-Rice-Goodhue- Watonwan-Blue Earth-Waseca-Steele-Martin-Faribault-Freeborn-Polk- Barron-Rusk-St. Croix-Pierce-Dunn-Pepin-Chippewa-Eau Claire- 124 PM CDT Wed May 15 2024 This Hazardous Weather Outlook is for portions of central Minnesota...east central Minnesota...south central Minnesota... southeast Minnesota...northwest Wisconsin and west central Wisconsin. .DAY ONE...This Afternoon and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... SKYWARN spotter activation will not be needed.
Special Weather Statement National Weather Service Twin Cities/Chanhassen MN 136 PM CDT Wed May 15 2024 MNZ041-047-048-054>057-064-065-073-152200- Douglas-Stevens-Pope-Lac Qui Parle-Swift-Chippewa-Kandiyohi- Yellow Medicine-Renville-Redwood- Including the cities of Alexandria, Morris, Glenwood, Madison, Benson, Montevideo, Willmar, Granite Falls, Olivia, and Redwood Falls 136 PM CDT Wed May 15 2024 One or two funnel clouds or weak landspouts are possible this afternoon as rain showers and a possible thunderstorm move through the area. Seek shelter on the lowest floor of a sturdy structure if you observe a funnel cloud or landspout. Relay any reports to local law enforcement or the National Weather Service when safe to do so.
The Sioux Falls radar (KFSD), 132 km away, was scanning. The volume nearest the first event began at 19:31 UTC.
1 funnel cloud. Local standard time, as filed.
A funnel cloud was photographed near Canby. Other funnel clouds may have occurred in the area, but additional information was not provided.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2024Every state in 2024This day in weather historyWarnings in Minnesota, May 2024
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1209346.