Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 14, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 29, 2021, 12:22 AM CDT for Columbia County, Dane County, Sauk County, Wisconsin. It was in force for 53 min. 2 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
- Jul 29, 2021, 12:22 AM CDT (05:22 UTC)
- Expired
- Jul 29, 2021, 1:15 AM CDT
- In force
- 53 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Columbia County, WI, Dane County, WI, Sauk County, WI
The radar
The Milwaukee radar (KMKX), 80 km from the middle of the area, began a volume at 05:22 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 |
|---|---|---|---|
| Jul 29, 12:40 AM CDT | TSTM WND DMG | Columbus, WI | NUMEROUS TREES AND LARGE BRANCHES DOWN. TIME ESTIMATED WITH RADAR. |
| Jul 29, 12:41 AM CDT | TORNADO | 2 Nw Columbus, WI | NWS STORM SURVEY HAS CONFIRMED A BRIEF EF-0 TORNADO NORTHWEST OF COLUMBUS. THIS TORNADO PRODUCED A NARROW PATH OF CROP AND TREE DAMAGE BETWEEN HALL RD AND HWY 16. PEAK WINDS ARE ESTIMATED TO BE AROUND 75 MPH. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 28, 7:17 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 5.4 hours before the alert went out and 144 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
- 593 J/kg
- Mixed-layer CIN
- -264 J/kg
- Mixed-layer LCL
- 1088 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
434
WUUS53 KMKX 290522
SVRMKX
WIC021-025-111-290615-
/O.NEW.KMKX.SV.W.0014.210729T0522Z-210729T0615Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
1222 AM CDT Thu Jul 29 2021
The National Weather Service in Milwaukee/Sullivan has issued a
* Severe Thunderstorm Warning for...
Columbia County in south central Wisconsin...
Northeastern Dane County in south central Wisconsin...
East central Sauk County in south central Wisconsin...
* Until 115 AM CDT.
* At 1222 AM CDT, severe thunderstorms were located along a line
extending from near Pardeeville to near Lake Wisconsin, moving
southeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Sun Prairie, Waunakee, Windsor, Columbus, Lake Wisconsin, Deforest,
Lodi, Poynette, Pardeeville, Randolph, Fall River, Rio, Cambria,
Dane, Arlington, Wyocena, Otsego, Merrimac, Friesland and
Doylestown.
This includes the following Locations Gibraltar Rock Natural Area
County Park and Alliant Energy Portage Power Plant.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4363 8912 4363 8901 4320 8901 4313 8959
4335 8976 4364 8926 4364 8913
TIME...MOT...LOC 0522Z 328DEG 36KT 4358 8924 4335 8964
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
HANSENThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 11:18 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Green Lake, Marquette | 72 min |
| Jul 28, 11:41 PM CDT | Tornado Warning | MKX | Fond du Lac | 20 min |
| Jul 28, 11:48 PM CDT | Special Weather Statement | MKX | Sauk | 42 min |
| Jul 28, 11:55 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Washington | 65 min |
| Jul 29, 12:26 AM CDT | Tornado Warning | MKX | Columbia, Dodge | 31 min |
| Jul 29, 12:43 AM CDT | Tornado Warning | MKX | Columbia, Dane, Dodge, Jefferson | 32 min |
| Jul 29, 12:45 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson | 45 min |
| Jul 29, 12:51 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa, Sauk | 39 min |
| Jul 29, 12:57 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Washington | 48 min |
| Jul 29, 1:07 AM CDT | Severe Thunderstorm Warning | MKX | Green, Lafayette | 38 min |
| Jul 29, 1:08 AM CDT | Tornado Warning | MKX | Jefferson, Waukesha | 37 min |
| Jul 29, 1:17 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson, Kenosha, Milwaukee, Racine, Rock and 2 more | 67 min |
| Jul 29, 1:24 AM CDT | Special Marine Warning | MKX | 96 min | |
| Jul 29, 1:31 AM CDT | Tornado Warning | MKX | Milwaukee, Racine, Walworth, Waukesha | 44 min |
| Jul 29, 1:36 AM CDT | Tornado Warning | MKX | Rock | 24 min |
| Jul 29, 1:51 AM CDT | Special Weather Statement | MKX | Green, Lafayette | 24 min |
| Jul 29, 4:06 AM CDT | Small Craft Advisory | MKX | 33 hr | |
| Jul 29, 2:02 PM CDT | Beach Hazards Statement | MKX | Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan | 29 hr |
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.