Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 66, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 7, 2021, 10:10 AM CDT for Fond du Lac County, Wisconsin. It was in force for 50 min. 5 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 7, 2021, 10:10 AM CDT (15:10 UTC)
- Expired
- Sep 7, 2021, 11:00 AM CDT
- In force
- 50 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Fond du Lac County, WI
The radar
The Milwaukee radar (KMKX), 86 km from the middle of the area, began a volume at 15:11 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 7, 10:24 AM CDT | HAIL 0.88 | 2 Sse Alto, WI | |
| Sep 7, 10:37 AM CDT | HAIL 0.88 | Fond Du Lac, WI | |
| Sep 7, 10:39 AM CDT | HAIL 1.5 | 3 S Fond Du Lac, WI | SPOTTER REPORTED PING PONG BALL SIZE HAIL NEAR THE INTERSECTION OF. |
| Sep 7, 10:42 AM CDT | HAIL 1 | 2 Sse Fond Du Lac, WI | |
| Sep 7, 10:45 AM CDT | HAIL 1.75 | Fond Du Lac, 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 12:00Z, 3.2 hours before the alert went out and 87 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
- 14 J/kg
- Mixed-layer CIN
- -216 J/kg
- Mixed-layer LCL
- 1012 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -120 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted.
355
WUUS53 KMKX 071510
SVRMKX
WIC039-071600-
/O.NEW.KMKX.SV.W.0066.210907T1510Z-210907T1600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
1010 AM CDT Tue Sep 7 2021
The National Weather Service in Milwaukee/Sullivan has issued a
* Severe Thunderstorm Warning for...
Central Fond du Lac County in east central Wisconsin...
* Until 1100 AM CDT.
* At 1010 AM CDT, a severe thunderstorm was located near Rosendale,
or 8 miles north of Waupun, moving east at 40 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Fond Du Lac, Waupun, North Fond Du Lac, Oakfield, Rosendale,
Brandon, Taycheedah, Lamartine, Byron, Alto, Eden, Fairwater, Oak
Center, Dundee, Waucousta, Lagoda and Town of Forest.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4381 8816 4363 8816 4363 8889 4381 8888
TIME...MOT...LOC 1510Z 266DEG 37KT 4376 8870
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
WOODThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 9:06 PM CDT | Small Craft Advisory | MKX | 45 hr | |
| Sep 7, 2:21 AM CDT | Gale Warning | MKX | 13 hr | |
| Sep 7, 8:41 AM CDT | Special Weather Statement | MKX | Marquette | 49 min |
| Sep 7, 8:57 AM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 48 min |
| Sep 7, 9:34 AM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 56 min |
| Sep 7, 10:27 AM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan | 78 min |
| Sep 7, 10:40 AM CDT | Special Weather Statement | MKX | Columbia, Dane, Dodge, Iowa | 65 min |
| Sep 7, 10:57 AM CDT | Special Marine Warning | MKX | 63 min | |
| Sep 7, 11:01 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Dodge, Jefferson | 59 min |
| Sep 7, 11:04 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac, Ozaukee, Sheboygan, Washington | 56 min |
| Sep 7, 11:11 AM CDT | Severe Thunderstorm Warning | MKX | Green, Rock | 34 min |
| Sep 7, 11:22 AM CDT | Special Marine Warning | MKX | 53 min | |
| Sep 7, 11:27 AM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Ozaukee, Washington, Waukesha | 48 min |
| Sep 7, 11:31 AM CDT | Special Marine Warning | MKX | 89 min | |
| Sep 7, 11:42 AM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 48 min |
| Sep 7, 11:45 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Milwaukee, Waukesha | 60 min |
| Sep 7, 12:18 PM CDT | Special Marine Warning | MKX | 87 min | |
| Sep 7, 12:19 PM CDT | Severe Thunderstorm Warning | MKX | Racine, Walworth | 40 min |
| Sep 7, 12:30 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Rock, Walworth | 60 min |
| Sep 7, 12:47 PM CDT | Special Weather Statement | MKX | Milwaukee | 28 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.