Alert archive / Wisconsin / Tornado Warnings in 2020
Tornado Warning 6, NWS Milwaukee, WI
NWS Milwaukee, WI issued this tornado warning at Aug 10, 2020, 1:23 PM CDT for Green County, Lafayette County, Wisconsin. It was in force for 27 min. 1 report 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 10, 2020, 1:23 PM CDT (18:23 UTC)
- Expired
- Aug 10, 2020, 1:50 PM CDT
- In force
- 27 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Green County, WI, Lafayette County, WI
The radar
The Milwaukee radar (KMKX), 117 km from the middle of the area, began a volume at 18:26 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 10, 1:29 PM CDT | TSTM WND DMG | Darlington, WI | MULTIPLE REPORTS OF DOWNED POWERLINES, TREE BRANCHES, AND A BLOWN TRANSFORMER AROUND ALICE ST. AND GALENA ST. ON THE SOUTH SIDE OF DARLINGTON. TIME ESTIMATED BASED ON RADAR. |
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 10, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 6.4 hours before the alert went out and 126 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
- 1683 J/kg
- Mixed-layer CIN
- -223 J/kg
- Mixed-layer LCL
- 894 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
218
WFUS53 KMKX 101823
TORMKX
WIC045-065-101900-
/O.NEW.KMKX.TO.W.0006.200810T1823Z-200810T1900Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
123 PM CDT Mon Aug 10 2020
The National Weather Service in Milwaukee/Sullivan has issued a
* Tornado Warning for...
Eastern Lafayette County in south central Wisconsin...
Central Green County in south central Wisconsin...
* Until 200 PM CDT.
* At 122 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Darlington, moving east at 40 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
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.
* This dangerous storm will be near...
Argyle and Blanchardville around 145 PM CDT.
New Glarus and Monticello around 200 PM CDT.
Other locations impacted by this tornadic thunderstorm include Wiota,
Yellowstone Lake St Park, Attica, Calamine, Lamont, Woodford, Jordan
Center, Fayette, Dayton and Gratiot.
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 4257 9024 4275 9028 4285 8948 4262 8940
TIME...MOT...LOC 1822Z 261DEG 36KT 4267 9016
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
BOXELL2 follow-up statements
742
WWUS53 KMKX 101833
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
133 PM CDT Mon Aug 10 2020
WIC045-065-101900-
/O.CON.KMKX.TO.W.0006.000000T0000Z-200810T1900Z/
Lafayette WI-Green WI-
133 PM CDT Mon Aug 10 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 PM CDT FOR EASTERN
LAFAYETTE AND CENTRAL GREEN COUNTIES...
At 133 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Darlington, moving east at 25 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Monroe, Darlington, New Glarus, Monticello, Albany, Argyle, Wiota,
Dayton, Fayette, Lamont, Gratiot, Attica, Calamine, Jordan Center,
Yellowstone Lake St Park and Woodford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4257 9018 4276 9018 4285 8948 4262 8940
TIME...MOT...LOC 1833Z 260DEG 24KT 4268 9011
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
BOXELL888
WWUS53 KMKX 101850
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
150 PM CDT Mon Aug 10 2020
WIC045-065-101859-
/O.CAN.KMKX.TO.W.0006.000000T0000Z-200810T1900Z/
Lafayette WI-Green WI-
150 PM CDT Mon Aug 10 2020
...THE TORNADO WARNING FOR EASTERN LAFAYETTE AND CENTRAL GREEN
COUNTIES IS CANCELLED...
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, damaging winds remain likely and a Severe
Thunderstorm Warning remains in effect for the area.
A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
south central Wisconsin.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Milwaukee/Sullivan.
LAT...LON 4257 9018 4276 9018 4285 8948 4262 8940
TIME...MOT...LOC 1849Z 261DEG 36KT 4271 8988
$$
BOXELLThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:06 PM CDT | Special Marine Warning | MKX | 54 min | |
| Aug 10, 8:02 AM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 43 min |
| Aug 10, 12:34 PM CDT | Severe Thunderstorm Warning | MKX | Iowa, Lafayette | 56 min |
| Aug 10, 1:26 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa, Lafayette | 64 min |
| Aug 10, 2:26 PM CDT | Tornado Warning | MKX | Green, Rock | 17 min |
| Aug 10, 2:29 PM CDT | Severe Thunderstorm Warning | MKX | Green, Rock, Walworth | 61 min |
| Aug 10, 2:35 PM CDT | Special Marine Warning | MKX | 115 min | |
| Aug 10, 2:44 PM CDT | Special Weather Statement | MKX | Iowa, Lafayette | 46 min |
| Aug 10, 3:13 PM CDT | Areal Flood Advisory | MKX | Rock | 3 hr |
| Aug 10, 3:13 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Rock, Walworth | 47 min |
| Aug 10, 3:18 PM CDT | Special Weather Statement | MKX | Sheboygan | 27 min |
| Aug 10, 3:21 PM CDT | Special Marine Warning | MKX | 114 min | |
| Aug 10, 3:26 PM CDT | Special Weather Statement | MKX | Fond du Lac | 64 min |
| Aug 10, 3:30 PM CDT | Special Weather Statement | MKX | Fond du Lac | 60 min |
| Aug 10, 3:37 PM CDT | Special Weather Statement | MKX | Rock | 38 min |
| Aug 10, 3:39 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine | 51 min |
| Aug 10, 3:42 PM CDT | Tornado Warning | MKX | Racine, Walworth | 16 min |
| Aug 10, 3:44 PM CDT | Tornado Warning | MKX | Kenosha | 31 min |
| Aug 10, 4:01 PM CDT | Special Weather Statement | MKX | Fond du Lac | 59 min |
| Aug 10, 4:10 PM CDT | Tornado Warning | MKX | Racine | 16 min |
| Aug 10, 4:21 PM CDT | Severe Thunderstorm Warning | MKX | Sheboygan | 39 min |
| Aug 10, 4:25 PM CDT | Special Marine Warning | MKX | 95 min | |
| Aug 10, 4:25 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine | 50 min |
| Aug 10, 4:34 PM CDT | Areal Flood Advisory | MKX | Jefferson, Kenosha, Milwaukee, Racine, Rock, Walworth and 1 more | 3 hr |
| Aug 10, 5:24 PM CDT | Special Marine Warning | MKX | 41 min |
Nearby
Tornado Warnings in Wisconsin, 2020Every tornado warning in 2020Tornadoes in 2020
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.