Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >
Overview
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A cold front moved it's way south across Wisconsin on Tuesday with storms developing quickly over north-central Wisconsin shortly after sunrise. These storms quickly became severe in the NWS Green Bay forecast area. Large hail was reported in the Appleton area with hail approaching 4 inches in diameter. Storms continued south to southeast along the front and hail of 2 to 3 inches was reported in Fond du Lac. Additional storms developed along the southern flank of the front near Madison and produced hail around 1 inch. These southern storms continued to strengthen and hail closer to 2 inches was reported in Rock and Walworth counties. While the storms were very strong there was enough of a stable layer near the surface to prevent strong wind gusts from these storms from reaching the surface. These storms did produce very frequent and intense lightning and a couple of houses were struck and caught fire from the lightning strikes. |
 Large Hail up to 3" in Fond du Lac from Betsy Spaeth |
Radar
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| Radar loop of storms as they moved across central and southern Wisconsin Tuesday morning into the early afternoon hours. |
Hail Photos
Hail ranged from pea size for most locations all the way up to Teacup size hail which is around 3 inches. The largest hail stones were reported in Fond du Lac.
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| 3" hail in Fond du Lac from Betsy Spaeth | 2" to 2.75" hail in Fond du Lac from Betsy Spaeth | Golfball Hail Fond du Lac from DDeumer via Twitter | Golfball Hail Ripon from SarahS relayed from WKOW27 |
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| Half Dollar hail in Fond du Lac from Jason Michael | Ping Pong Ball hail in Cleveland from Sara Tremblay | Ping Pong Ball hail in Delavan from Bridgett Zerbach | Ping Pong Ball hail in Delavan from Jeff Coblentz |
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| Ping Pong Ball hail in Delavan from Tom Russ | Ping Pong Ball hail in Doylestown from Bonnie Langsdorf | Ping Pong Ball hail in Fond du Lac from Sharky Berenz | Quarter size hail in Juneau from Ashley Rabehl |
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| Quarter size hail in Lake Geneva from Melissa McKay | Quarter size hail in Mazomanie from Anita Robinson | Quarter size hail in Town of Geneva from Kelly Herwald | Quarter size hail in Edgerton from Abby Mazuk relayed from WKOW27 |
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| Penny size hail in Lake Geneva from Sara Wahlstedt | Quarter size hail in Milton from Michael Gouvin | Quarter size hail in Kristin Behring relayed from NBC15 | Quarter size hail in Westfield from Dana Rae Neufeld relayed from WKOW |
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| Golfball hail in Delavan from David Eucker relayed from TMJ4 | 1.5" hail in Delavan from Meg Syves | 1.25" hail in Delavan from Josh Schmirler | Ping Pong ball size hail in Ripon from Kimberly Young |
Storm Reports
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| Link to Map of storm reports |
000 NWUS53 KMKX 072035 LSRMKX PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 335 PM CDT TUE SEP 7 2021 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 1045 AM HAIL 1 N KEWASKUM 43.53N 88.23W 09/07/2021 E1.00 INCH WASHINGTON WI PUBLIC 1122 AM HAIL ALLENTON 43.42N 88.33W 09/07/2021 M1.00 INCH WASHINGTON WI LAW ENFORCEMENT SHERIFFS OFFICE REPORTED QUARTER SIZE HAIL IN ALLENTON. 1232 PM HAIL DELAVAN 42.63N 88.63W 09/07/2021 E1.25 INCH WALWORTH WI TRAINED SPOTTER CORRECTS PREVIOUS HAIL REPORT FROM DELAVAN. 1.0 TO 1.25 INCH HAIL REPORTED BY TRAINED SPOTTER. 1233 PM HAIL 1 N DELAVAN 42.64N 88.63W 09/07/2021 M1.50 INCH WALWORTH WI PUBLIC MULTIPLE REPORTS OF 1.0 TO 1.5 INCH HAIL REPORTED AROUND DELAVAN WI. 1242 PM HAIL ELKHORN 42.67N 88.54W 09/07/2021 E1.00 INCH WALWORTH WI PUBLIC 1244 PM HAIL WILLIAMS BAY 42.58N 88.54W 09/07/2021 M1.50 INCH WALWORTH WI PUBLIC PENNY SIZE TO PING PONG BALL SIZE. TIME ESTIMATED FROM RADAR. 1244 PM HAIL 1 NNE COMO 42.62N 88.49W 09/07/2021 E1.00 INCH WALWORTH WI PUBLIC 1246 PM HAIL 1 S COMO 42.59N 88.49W 09/07/2021 E1.00 INCH WALWORTH WI PUBLIC 1248 PM HAIL 1 NNW WALWORTH 42.54N 88.60W 09/07/2021 E1.00 INCH WALWORTH WI PUBLIC 1112 AM HAIL 2 N KOHLER 43.76N 87.78W 09/07/2021 E1.00 INCH SHEBOYGAN WI PUBLIC 1135 AM HAIL EDGERTON 42.84N 89.06W 09/07/2021 M1.00 INCH ROCK WI PUBLIC 1152 AM HAIL MILTON 42.77N 88.96W 09/07/2021 U1.00 INCH ROCK WI PUBLIC REPORT FROM MPING: QUARTER (1.00 IN.). 1235 PM HAIL 4 WSW CLINTON 42.54N 88.93W 09/07/2021 M1.00 INCH ROCK WI PUBLIC 0847 AM HAIL WESTFIELD 43.89N 89.49W 09/07/2021 E1.00 INCH MARQUETTE WI PUBLIC TIME ESTIMATED FROM RADAR. 1124 AM HAIL 2 WSW WATERTOWN 43.18N 88.75W 09/07/2021 E1.00 INCH JEFFERSON WI PUBLIC 0918 AM HAIL BERLIN 43.97N 88.95W 09/07/2021 M1.00 INCH GREEN LAKE WI LAW ENFORCEMENT 1024 AM HAIL MARKESAN 43.71N 88.99W 09/07/2021 E1.00 INCH GREEN LAKE WI PUBLIC PENNY TO QUARTER SIZE HAIL. 0943 AM HAIL RIPON 43.85N 88.84W 09/07/2021 E2.00 INCH FOND DU LAC WI PUBLIC REPORTS OF 3/4 INCH UP TO 2 INCH HAIL. 1010 AM HAIL 2 NNE NORTH FOND DU LAC 43.84N 88.47W 09/07/2021 M3.00 INCH FOND DU LAC WI PUBLIC IMAGE SHARED WITH US ON SOCIAL MEDIA. 1024 AM HAIL 2 SSE ALTO 43.65N 88.77W 09/07/2021 M0.88 INCH FOND DU LAC WI PUBLIC 1037 AM HAIL FOND DU LAC 43.78N 88.45W 09/07/2021 M0.88 INCH FOND DU LAC WI PUBLIC 1039 AM HAIL 3 S FOND DU LAC 43.74N 88.45W 09/07/2021 E1.50 INCH FOND DU LAC WI TRAINED SPOTTER SPOTTER REPORTED PING PONG BALL SIZE HAIL NEAR THE INTERSECTION OF. 1042 AM HAIL 2 SSE FOND DU LAC 43.75N 88.43W 09/07/2021 M1.00 INCH FOND DU LAC WI PUBLIC 1045 AM HAIL FOND DU LAC 43.78N 88.45W 09/07/2021 E1.75 INCH FOND DU LAC WI PUBLIC 1056 AM HEAVY RAIN 2 ESE FOND DU LAC 43.77N 88.41W 09/07/2021 M0.80 INCH FOND DU LAC WI PUBLIC 0.8 INCHES OF RAIN REPORTED OVER HALF HOUR DURATION IN EASTERN FOND DU LAC. 1107 AM HAIL JUNEAU 43.41N 88.70W 09/07/2021 M1.00 INCH DODGE WI LAW ENFORCEMENT NICKEL TO QUARTER SIZE HAIL. 1030 AM HAIL MAZOMANIE 43.17N 89.80W 09/07/2021 M1.00 INCH DANE WI PUBLIC REPORT OF QUARTER SIZE HAIL FROM MAZOMANIE. TIME ESTIMATED FROM RADAR. 1051 AM HAIL 4 NNE CROSS PLAINS 43.17N 89.62W 09/07/2021 E1.00 INCH DANE WI PUBLIC 1055 AM HAIL 1 ESE MIDDLETON 43.10N 89.49W 09/07/2021 E1.00 INCH DANE WI PUBLIC 1055 AM HAIL 1 NNW WAUNAKEE 43.21N 89.46W 09/07/2021 M0.88 INCH DANE WI PUBLIC 1057 AM HAIL 1 NNE VERONA 43.00N 89.53W 09/07/2021 M1.00 INCH DANE WI PUBLIC 1058 AM HAIL 2 W VERONA 42.99N 89.57W 09/07/2021 E1.50 INCH DANE WI PUBLIC 1108 AM HAIL MCFARLAND 43.02N 89.29W 09/07/2021 M1.00 INCH DANE WI BROADCAST MEDIA TIME ESTIMATED FROM RADAR. 1110 AM HAIL FITCHBURG 42.99N 89.43W 09/07/2021 M1.00 INCH DANE WI PUBLIC 1122 AM HAIL STOUGHTON 42.92N 89.23W 09/07/2021 M1.00 INCH DANE WI TRAINED SPOTTER SPOTTER REPORTED QUARTER SIZE HAIL IN STOUGHTON. 1038 AM HAIL DOYLESTOWN 43.43N 89.15W 09/07/2021 M1.50 INCH COLUMBIA WI PUBLIC TIME ESTIMATED FROM RADAR. && $$
Rain Reports
Map of rainfall reports from Co-op, CoCoRaHS, and airport observations.
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| Event total rainfall |
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