Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 82, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 13, 2021, 3:34 AM CDT for Milwaukee County, Waukesha County, Wisconsin. It was in force for 41 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 13, 2021, 3:34 AM CDT (08:34 UTC)
- Expired
- Sep 13, 2021, 4:15 AM CDT
- In force
- 41 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Milwaukee County, WI, Waukesha County, WI
The radar
The Milwaukee radar (KMKX), 50 km from the middle of the area, began a volume at 08:37 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 13, 3:34 AM CDT | HAIL 0.75 | 2 Wnw Waukesha, WI | |
| Sep 13, 3:40 AM CDT | HAIL 0.75 | 3 Ene Waukesha, WI | |
| Sep 13, 3:43 AM CDT | HAIL 0.75 | 1 Ssw Brookfield, WI | |
| Sep 13, 4:05 AM CDT | HAIL 0.88 | 1 Ese Saint Francis, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 8.6 hours before the alert went out and 163 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1081 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
659
WUUS53 KMKX 130834
SVRMKX
WIC079-133-130915-
/O.NEW.KMKX.SV.W.0082.210913T0834Z-210913T0915Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
334 AM CDT Mon Sep 13 2021
The National Weather Service in Milwaukee/Sullivan has issued a
* Severe Thunderstorm Warning for...
Milwaukee County in southeastern Wisconsin...
Northeastern Waukesha County in southeastern Wisconsin...
* Until 415 AM CDT.
* At 334 AM CDT, a severe thunderstorm was located over Waukesha,
moving east at 35 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Milwaukee, Waukesha, West Allis, Wauwatosa, New Berlin, Brookfield,
Greenfield, Menomonee Falls, Oak Creek, Muskego, South Milwaukee,
Cudahy, Whitefish Bay, Greendale, Pewaukee, St. Francis, Hales
Corners, Elm Grove, West Milwaukee and Glendale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4290 8785 4294 8834 4311 8832 4313 8790
4312 8790 4310 8787 4307 8787 4305 8789
4302 8790 4299 8788 4296 8785 4291 8784
TIME...MOT...LOC 0834Z 271DEG 30KT 4301 8823
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
BOXELL2 follow-up statements
784
WWUS53 KMKX 130852
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
352 AM CDT Mon Sep 13 2021
WIC133-130902-
/O.CAN.KMKX.SV.W.0082.000000T0000Z-210913T0915Z/
Waukesha WI-
352 AM CDT Mon Sep 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WAUKESHA COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4290 8785 4292 8807 4312 8806 4313 8790
4312 8790 4310 8787 4307 8787 4305 8789
4302 8790 4299 8788 4296 8785 4291 8784
TIME...MOT...LOC 0852Z 271DEG 30KT 4301 8802
$$
WIC079-130915-
/O.CON.KMKX.SV.W.0082.000000T0000Z-210913T0915Z/
Milwaukee WI-
352 AM CDT Mon Sep 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 AM CDT
FOR CENTRAL MILWAUKEE COUNTY...
At 352 AM CDT, a severe thunderstorm was located over West Allis,
moving east at 35 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Milwaukee, West Allis, Wauwatosa, Greenfield, Oak Creek, South
Milwaukee, Cudahy, Whitefish Bay, Greendale, St. Francis, Hales
Corners, West Milwaukee, Glendale, Franklin, Milwaukee Hoan Bridge,
Shorewood, State Fair Park, Marquette University, UW-
Milwaukee and Mitchell Park Domes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4290 8785 4292 8807 4312 8806 4313 8790
4312 8790 4310 8787 4307 8787 4305 8789
4302 8790 4299 8788 4296 8785 4291 8784
TIME...MOT...LOC 0852Z 271DEG 30KT 4301 8802
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
BOXELL468
WWUS53 KMKX 130905
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
405 AM CDT Mon Sep 13 2021
WIC079-130915-
/O.EXP.KMKX.SV.W.0082.000000T0000Z-210913T0915Z/
Milwaukee WI-
405 AM CDT Mon Sep 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MILWAUKEE COUNTY WILL
EXPIRE AT 415 AM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Milwaukee/Sullivan.
LAT...LON 4290 8785 4292 8807 4312 8806 4313 8790
4312 8790 4310 8787 4307 8787 4305 8789
4302 8790 4299 8788 4296 8785 4291 8784
TIME...MOT...LOC 0905Z 271DEG 30KT 4301 8787
$$
BOXELLThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 1:41 AM CDT | Special Weather Statement | MKX | Dane, Iowa | 34 min |
| Sep 13, 1:55 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson | 50 min |
| Sep 13, 2:15 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa | 45 min |
| Sep 13, 2:38 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Waukesha | 52 min |
| Sep 13, 2:45 AM CDT | Severe Thunderstorm Warning | MKX | Dane | 30 min |
| Sep 13, 3:15 AM CDT | Special Weather Statement | MKX | Jefferson | 30 min |
| Sep 13, 3:29 AM CDT | Special Weather Statement | MKX | Waukesha | 31 min |
| Sep 13, 3:38 AM CDT | Special Marine Warning | MKX | 75 min | |
| Sep 13, 6:11 AM CDT | Severe Thunderstorm Warning | MKX | Iowa, Sauk | 28 min |
| Sep 13, 7:43 AM CDT | Special Weather Statement | MKX | Jefferson | 32 min |
| Sep 13, 8:21 AM CDT | Special Weather Statement | MKX | Milwaukee, Ozaukee, Washington, Waukesha | 39 min |
| Sep 13, 1:13 PM CDT | Small Craft Advisory | MKX | 29 hr | |
| Sep 13, 3:51 PM CDT | Special Weather Statement | MKX | Dodge | 39 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.