Alert archive / Wisconsin / Tornado Warnings in 2019

Tornado Warning 4, NWS Milwaukee, WI

October 1, 2019Jefferson County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Oct 1, 2019, 9:31 PM CDT for Jefferson County, Wisconsin. It was in force for 29 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
Oct 1, 2019, 9:31 PM CDT (02:31 UTC)
Expired
Oct 1, 2019, 10:00 PM CDT
In force
29 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Jefferson County, WI

The radar

The Milwaukee radar (KMKX), 19 km from the middle of the area, began a volume at 02:34 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

TimeReportWhereRemark
Oct 1, 9:33 PM CDTTSTM WND DMG1 Ssw Fort Atkinson, WIROOF DAMAGE, TREES DOWN AND WINDOWS BLOWN OUT ACROSS THE SOUTH END OF TOWN. POSSIBLE TORNADO. TIME ESTIMATED BY RADAR.
Oct 1, 9:42 PM CDTTORNADO3 Wsw Sullivan, WICORRECTS PREVIOUS TORNADO REPORT FROM 3 WSW SULLIVAN. NWS STORM SURVEY CONFIRMS AN EF-1 RATED TORNADO WITH PEAK WINDS OF 100 MPH. NUMEROUS TREES SNAPPED OR UPROOTED. ROOF DAMAGE TO SEVERAL STRUCTURES. STARTING POINT IS NEAR INTERSECTION OF ROME RD. AND FROELIC
Oct 1, 9:42 PM CDTTORNADO3 Wsw Sullivan, WINWS STORM SURVEY CONFIRMS AN EF-1 RATED TORNADO. NUMEROUS TREES SNAPPED OR UPROOTED. ROOF DAMAGE TO SEVERAL STRUCTURES. STARTING POINT IS NEAR INTERSECTION OF ROME RD. AND FROELICH RD. WITH AND END POINT NEAR HIGHWAY 83 BETWEEN HIGHWAYS E AND D.

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.

IssuedProductOfficeLasted
Oct 1, 6:05 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.5 hours before the alert went out and 183 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.

Skew-T log-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 2019-10-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 2019-10-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 175 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
554 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
175 m²/s²
0-3 km storm-relative helicity
367 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

037 
WFUS53 KMKX 020231
TORMKX
WIC055-020300-
/O.NEW.KMKX.TO.W.0004.191002T0231Z-191002T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
931 PM CDT Tue Oct 1 2019

The National Weather Service in Milwaukee/Sullivan has issued a

* Tornado Warning for...
  Southern Jefferson County in southeastern Wisconsin...

* Until 1000 PM CDT.
    
* At 931 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Fort Atkinson, moving east at 45 mph.

  HAZARD...Tornado.

  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...
  Jefferson around 935 PM CDT.
  Whitewater around 940 PM CDT.
  Palmyra around 950 PM CDT.

Other locations impacted by this tornadic thunderstorm include Rome,
Sullivan, Nws Milwaukee/sullivan and Hebron.

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 4287 8898 4299 8889 4302 8854 4284 8855
      4284 8866
TIME...MOT...LOC 0231Z 273DEG 38KT 4292 8888 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

MRC
2 follow-up statements
265 
WWUS53 KMKX 020243
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
943 PM CDT Tue Oct 1 2019

WIC055-020300-
/O.CON.KMKX.TO.W.0004.000000T0000Z-191002T0300Z/
Jefferson WI-
943 PM CDT Tue Oct 1 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
SOUTHEASTERN JEFFERSON COUNTY...

At 943 PM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located near
Whitewater, moving east at 45 mph.

HAZARD...Tornado.

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.

These dangerous storms will be near...
  Palmyra around 950 PM CDT.

Other locations impacted by this tornadic thunderstorm include Rome,
Sullivan, Nws Milwaukee/sullivan and Hebron.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4285 8877 4300 8875 4302 8854 4284 8855
      4284 8866
TIME...MOT...LOC 0243Z 273DEG 38KT 4291 8871 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

MRC
158 
WWUS53 KMKX 020251
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
951 PM CDT Tue Oct 1 2019

WIC055-020300-
/O.EXP.KMKX.TO.W.0004.000000T0000Z-191002T0300Z/
Jefferson WI-
951 PM CDT Tue Oct 1 2019

...THE TORNADO WARNING FOR SOUTHEASTERN JEFFERSON COUNTY WILL EXPIRE
AT 1000 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
southeastern Wisconsin.

LAT...LON 4285 8877 4300 8875 4302 8854 4284 8855
      4284 8866
TIME...MOT...LOC 0250Z 273DEG 38KT 4291 8863 

$$

MRC

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 1, 7:13 PM CDTSpecial Weather StatementMKXOzaukee, Washington77 min
Oct 1, 7:29 PM CDTFlash Flood WarningMKXDodge, Fond du Lac, Sheboygan3 hr
Oct 1, 7:38 PM CDTFlash Flood WarningMKXColumbia, Dane, Dodge, Sauk3 hr
Oct 1, 8:00 PM CDTSpecial Weather StatementMKXIowa, Lafayette60 min
Oct 1, 8:08 PM CDTAreal Flood AdvisoryMKXDane, Iowa, Lafayette3 hr
Oct 1, 8:35 PM CDTFlash Flood WarningMKXColumbia, Dane3 hr
Oct 1, 8:41 PM CDTRiver Flood WarningMKXSheboygan67 hr
Oct 1, 8:43 PM CDTSpecial Weather StatementMKXDane62 min
Oct 1, 8:51 PM CDTFlash Flood WarningMKXDodge, Ozaukee, Washington3 hr
Oct 1, 9:24 PM CDTSpecial Weather StatementMKXRock, Walworth, Waukesha51 min
Oct 1, 9:47 PM CDTAreal Flood AdvisoryMKXJefferson, Milwaukee, Rock, Waukesha3 hr
Oct 1, 9:48 PM CDTTornado WarningMKXWaukesha27 min
Oct 1, 10:31 PM CDTFlash Flood WarningMKXMilwaukee, Racine, Rock, Walworth, Waukesha2 hr
Oct 1, 10:57 PM CDTSpecial Marine WarningMKX63 min
Oct 2, 12:00 AM CDTRiver Flood WarningMKXFond du Lac21 days
Oct 2, 2:40 AM CDTRiver Flood WarningMKXDane38 hr
Oct 2, 3:37 AM CDTRiver Flood WarningMKXOzaukee21 days
Oct 2, 3:54 AM CDTRiver Flood WarningMKXOzaukee6 days
Oct 2, 4:04 AM CDTRiver Flood WarningMKXKenosha21 days
Oct 2, 5:28 AM CDTRiver Flood WarningMKXSauk7 days
Oct 2, 8:25 AM CDTRiver Flood WarningMKXColumbia21 days
Oct 2, 9:38 AM CDTRiver Flood WarningMKXOzaukee25 hr
Oct 2, 10:05 AM CDTRiver Flood WarningMKXLafayette66 hr
Oct 2, 10:05 AM CDTRiver Flood WarningMKXMilwaukee34 hr
Oct 2, 10:05 AM CDTRiver Flood WarningMKXRacine57 hr
Oct 2, 10:05 AM CDTRiver Flood WarningMKXRock54 hr
Oct 2, 10:05 AM CDTRiver Flood WarningMKXRock37 hr
Oct 2, 10:40 AM CDTRiver Flood WatchMKXJefferson29 hr
Oct 2, 10:40 AM CDTRiver Flood WatchMKXRock22 days
Oct 2, 10:40 AM CDTRiver Flood WatchMKXRacine5 days
Oct 2, 2:49 PM CDTLakeshore Flood AdvisoryMKXKenosha, Milwaukee, Ozaukee, Racine, Sheboygan13 hr
Oct 2, 4:36 PM CDTRiver Flood WarningMKXRock37 days
Oct 2, 4:36 PM CDTRiver Flood WarningMKXRacine5 days

Nearby

Tornado Warnings in Wisconsin, 2019Every tornado warning in 2019Tornadoes in 2019

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.