Alert archive / Wisconsin / Special Weather Statements in 2021
Special Weather Statement, NWS Milwaukee, WI
NWS Milwaukee, WI issued this special weather statement at Aug 7, 2021, 11:47 AM CDT for Dodge County, Jefferson County, Wisconsin. It was in force for 58 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
- Aug 7, 2021, 11:47 AM CDT (16:47 UTC)
- Expired
- Aug 7, 2021, 12:45 PM CDT
- In force
- 58 min
- Issued by
- NWS Milwaukee, WI
- Hail
- 0.25 in
- Wind
- 55
Counties Dodge County, WI, Jefferson County, WI
The radar
The Milwaukee radar (KMKX), 45 km from the middle of the area, began a volume at 16:47 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 |
|---|---|---|---|
| Aug 7, 12:30 PM CDT | TSTM WND DMG | 1 W Watertown, WI | LARGE TREES DOWN ALONG WEST ST. ALONG WITH PEA SIZE HAIL. |
| Aug 7, 12:30 PM CDT | TSTM WND GST 60 | 1 W Watertown, WI | |
| Aug 7, 12:35 PM CDT | TSTM WND DMG | 1 S Watertown, WI | TREE DOWN ALONG BOOMER ST. |
| Aug 7, 12:35 PM CDT | TSTM WND GST 60 | 1 S Watertown, WI | MEASURED AT WATERTOWN AIRPORT. |
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, 4.8 hours before the alert went out and 143 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
- 20 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 656 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
620
WWUS83 KMKX 071647
SPSMKX
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1147 AM CDT Sat Aug 7 2021
WIZ057-058-063-064-071745-
Dodge WI-Columbia WI-Jefferson WI-Dane WI-
1147 AM CDT Sat Aug 7 2021
...Strong thunderstorms will impact portions of southeastern
Columbia, northeastern Dane, northwestern Jefferson and southern
Dodge Counties through 1245 PM CDT...
At 1147 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles northeast of Fall River to near
Columbus to 6 miles north of Waterloo. Movement was southeast at 25
mph.
HAZARD...Wind gusts of 50 to 55 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Watertown, Beaver Dam, Jefferson, Lake Mills, Columbus, Marshall,
Waterloo, Juneau, Johnson Creek, Fall River, Hustisford, Lebanon,
Milford, Reeseville, Richwood, Clyman, Lowell, Hubbleton, Danville
and Pipersville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.
&&
LAT...LON 4336 8852 4296 8875 4325 8916 4339 8906
4357 8906
TIME...MOT...LOC 1647Z 303DEG 21KT 4346 8897 4335 8897 4327 8903
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
$$
HANSENThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 7:34 PM CDT | Areal Flood Advisory | MKX | Milwaukee, Waukesha | 119 min |
| Aug 6, 7:38 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson | 37 min |
| Aug 6, 7:55 PM CDT | Special Marine Warning | MKX | 50 min | |
| Aug 6, 7:57 PM CDT | Special Weather Statement | MKX | Kenosha, Racine, Walworth | 63 min |
| Aug 6, 8:00 PM CDT | Areal Flood Advisory | MKX | Jefferson, Rock, Walworth | 2 hr |
| Aug 6, 8:14 PM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 31 min |
| Aug 6, 8:51 PM CDT | Special Weather Statement | MKX | Rock, Walworth | 54 min |
| Aug 6, 9:45 PM CDT | Severe Thunderstorm Warning | MKX | Dane | 30 min |
| Aug 6, 10:15 PM CDT | Special Weather Statement | MKX | Dane | 30 min |
| Aug 7, 10:06 AM CDT | Special Weather Statement | MKX | Columbia, Marquette | 54 min |
| Aug 7, 11:01 AM CDT | Special Weather Statement | MKX | Columbia, Green Lake | 59 min |
| Aug 7, 12:32 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson | 43 min |
| Aug 7, 12:54 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Waukesha | 45 min |
| Aug 7, 1:48 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 42 min |
| Aug 7, 3:53 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 52 min |
| Aug 7, 4:33 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Iowa, Sauk | 57 min |
| Aug 7, 4:38 PM CDT | Tornado Warning | MKX | Iowa | 67 min |
| Aug 7, 5:17 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Green Lake, Marquette, Sauk | 58 min |
| Aug 7, 5:26 PM CDT | Tornado Warning | MKX | Columbia | 39 min |
| Aug 7, 5:31 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane | 59 min |
| Aug 7, 5:33 PM CDT | Tornado Warning | MKX | Iowa | 57 min |
| Aug 7, 6:03 PM CDT | Special Weather Statement | MKX | Dodge, Fond du Lac, Green Lake | 42 min |
| Aug 7, 6:09 PM CDT | Severe Thunderstorm Warning | MKX | Dane | 66 min |
| Aug 7, 6:25 PM CDT | Severe Thunderstorm Warning | MKX | Dane | 50 min |
| Aug 7, 6:40 PM CDT | Special Weather Statement | MKX | Jefferson | 50 min |
Nearby
Special Weather Statements in Wisconsin, 2021Every special weather statement 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.