Alert archive / Wisconsin / Tornado Warnings in 2021
Tornado Warning 8, NWS Milwaukee, WI
NWS Milwaukee, WI issued this tornado warning at Aug 7, 2021, 4:38 PM CDT for Iowa County, Wisconsin. It was in force for 67 min. 3 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, 4:38 PM CDT (21:38 UTC)
- Expired
- Aug 7, 2021, 5:45 PM CDT
- In force
- 67 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 1.0 in
County Iowa County, WI
The radar
The La Crosse radar (KARX), 104 km from the middle of the area, began a volume at 21:42 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, 5:09 PM CDT | HAIL 2.5 | 3 Nnw Highland, WI | MULTIPLE REPORTS OF TENNIS BALL SIZED HAIL FROM FARMERS IN NW IOWA COUNTY VIA NWS DAMAGE SURVEY. NO MEASUREMENTS, BUT SAID TWO HAIL STONES WOULD FIT END TO END ON A DOLLAR BILL OR SLIGHTLY LOWER. |
| Aug 7, 5:09 PM CDT | TORNADO | 2 Nnw Highland, WI | NWS DAMAGE SURVEY IN NW IOWA COUNTY FOUND LOW END EF-1 TORNADO DAMAGE. MAIN STRUCTURAL DAMAGE TO TWO BARNS ON A PROPERTY NORTH OF HIGHLAND ON CAMP RD. OTHERWISE, MAINLY SPORADIC TREE DAMAGE EAST OF THERE. |
| Aug 7, 5:15 PM CDT | TSTM WND DMG | 2 N Highland, WI | COUNTY SHERIFF REPORTS BARN DAMAGE AND TREES TOPPED ALONG CAMP ROAD NORTH OF HIGHLAND. POSSIBLE TORNADO. |
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 |
|---|---|---|---|
| Aug 7, 4:36 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.6 hours before the alert went out and 173 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
- 1645 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 1006 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
653
WFUS53 KMKX 072138
TORMKX
WIC049-072245-
/O.NEW.KMKX.TO.W.0008.210807T2138Z-210807T2245Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
438 PM CDT Sat Aug 7 2021
The National Weather Service in Milwaukee/Sullivan has issued a
* Tornado Warning for...
Northwestern Iowa County in south central Wisconsin...
* Until 545 PM CDT.
* At 438 PM CDT, a tornado producing storm was located over Boscobel,
or 19 miles southwest of Richland Center, moving east at 25 mph.
HAZARD...Damaging tornado and quarter size hail.
SOURCE...Radar confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* Locations impacted include...
Avoca, Orion and Clyde.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 4320 9043 4321 9033 4321 9029 4319 9028
4319 9025 4317 9022 4316 9018 4317 9016
4317 9014 4304 9013 4307 9043
TIME...MOT...LOC 2138Z 263DEG 23KT 4313 9064
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
CMILLER3 follow-up statements
831
WWUS53 KMKX 072148
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
448 PM CDT Sat Aug 7 2021
WIC049-072245-
/O.CON.KMKX.TO.W.0008.000000T0000Z-210807T2245Z/
Iowa WI-
448 PM CDT Sat Aug 7 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
NORTHWESTERN IOWA COUNTY...
At 446 PM CDT, a confirmed tornado was located near Boscobel, or 17
miles southwest of Richland Center, moving east at 25 mph.
HAZARD...Damaging tornado and quarter size hail.
SOURCE...Radar confirmed tornado. Numerous reports of trees down and
trailer homes in the Boscobel area.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Avoca, Orion and Clyde.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 4320 9043 4321 9033 4321 9029 4319 9028
4319 9025 4317 9022 4316 9018 4317 9016
4317 9014 4304 9013 4307 9043
TIME...MOT...LOC 2146Z 263DEG 23KT 4312 9056
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
CMILLER148
WWUS53 KMKX 072155
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
455 PM CDT Sat Aug 7 2021
WIC049-072245-
/O.CON.KMKX.TO.W.0008.000000T0000Z-210807T2245Z/
Iowa WI-
455 PM CDT Sat Aug 7 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
NORTHWESTERN IOWA COUNTY...
At 454 PM CDT, a confirmed tornado was located near Muscoda, or 15
miles south of Richland Center, moving east at 25 mph.
HAZARD...Damaging tornado and quarter size hail.
SOURCE...Emergency management confirmed tornado. At 4:50 PM a
tornado was reported south of Blue River near County
Highway T.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Avoca, Orion and Clyde.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 4320 9043 4321 9033 4321 9029 4319 9028
4319 9025 4317 9022 4316 9018 4317 9016
4317 9014 4304 9013 4307 9043
TIME...MOT...LOC 2154Z 263DEG 23KT 4313 9049
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
CMILLER323
WWUS53 KMKX 072236
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
536 PM CDT Sat Aug 7 2021
WIC049-072245-
/O.CON.KMKX.TO.W.0008.000000T0000Z-210807T2245Z/
Iowa WI-
536 PM CDT Sat Aug 7 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
NORTHWESTERN IOWA COUNTY...
At 535 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Spring Green, or 13 miles north of Dodgeville,
moving east at 25 mph.
HAZARD...Tornado and half dollar size hail.
SOURCE...Radar indicated rotation. This storm has a history of
producing tornadoes.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Clyde.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4318 9032 4318 9026 4317 9024 4317 9022
4316 9018 4316 9016 4315 9014 4304 9013
4307 9036
TIME...MOT...LOC 2235Z 263DEG 23KT 4316 9013
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
$$
CMILLERThe 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, 11:47 AM CDT | Special Weather Statement | MKX | Dodge, Jefferson | 58 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, 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
Tornado Warnings in Wisconsin, 2021Every tornado warning in 2021Tornadoes 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.