Alert archive / Wisconsin / Tornado Warnings in 2017

Tornado Warning 8, NWS Green Bay, WI

July 7, 2017Manitowoc County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Jul 7, 2017, 5:29 PM CDT for Manitowoc County, Wisconsin. It was in force for 31 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
Jul 7, 2017, 5:29 PM CDT (22:29 UTC)
Expired
Jul 7, 2017, 6:00 PM CDT
In force
31 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.75 in

County Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 63 km from the middle of the area, began a volume at 22:30 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
Jul 7, 5:36 PM CDTHAIL 1.25School Hill, WIFOX 11.
Jul 7, 5:37 PM CDTFUNNEL CLOUD10 Nw Cleveland, WITIME ESTIMATED. DELAYED REPORT.
Jul 7, 5:45 PM CDTHAIL 1.754 W Cleveland, WI
Jul 7, 5:45 PM CDTHAIL 1.75Spring Valley, WI

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, 10.5 hours before the alert went out and 61 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 12:00Z on 2017-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2017-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -52 square meters per square second.19395878Sfc1 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
1226 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-52 m²/s²
0-3 km storm-relative helicity
-21 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

348 
WFUS53 KGRB 072229
TORGRB
WIC071-072300-
/O.NEW.KGRB.TO.W.0008.170707T2229Z-170707T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Green Bay WI
529 PM CDT FRI JUL 7 2017

The National Weather Service in Green Bay has issued a

* Tornado Warning for...
  Southwestern Manitowoc County in east central Wisconsin...

* Until 600 PM CDT.

* At 528 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over St. Nazianz, or 12 miles north of Howards Grove,
  moving southeast at 30 mph.

  HAZARD...Tornado and golf ball 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...
  Spring Valley around 540 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Louis
Corners, St Nazianz, Osman, School Hill, Spring Valley and Steinthal.

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 4400 8801 4404 8788 4390 8768 4389 8772
      4389 8795
TIME...MOT...LOC 2228Z 326DEG 25KT 4400 8792 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

RDM
3 follow-up statements
097 
WWUS53 KGRB 072243
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
543 PM CDT FRI JUL 7 2017

WIC071-072300-
/O.CON.KGRB.TO.W.0008.000000T0000Z-170707T2300Z/
Manitowoc WI-
543 PM CDT FRI JUL 7 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR SOUTH
CENTRAL MANITOWOC COUNTY...
    
At 542 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Cleveland, or near Howards Grove, moving southeast
at 30 mph.

HAZARD...Tornado and two inch 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 tornadic thunderstorm will remain over mainly rural areas of
south central Manitowoc County, including the following locations:
Osman, School Hill and Spring Valley.

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 4397 8794 4401 8784 4390 8768 4390 8769
      4389 8772 4389 8790
TIME...MOT...LOC 2242Z 326DEG 25KT 4392 8784 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

RDM
690 
WWUS53 KGRB 072249
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
549 PM CDT FRI JUL 7 2017

WIC071-072300-
/O.CON.KGRB.TO.W.0008.000000T0000Z-170707T2300Z/
Manitowoc WI-
549 PM CDT FRI JUL 7 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR SOUTH
CENTRAL MANITOWOC COUNTY...
    
At 549 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Cleveland, or near Howards Grove, moving southeast
at 30 mph.

HAZARD...Tornado and two inch 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...
Cleveland.

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 4389 8790 4391 8786 4391 8775 4390 8769
      4389 8772
TIME...MOT...LOC 2249Z 326DEG 25KT 4388 8780 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

RDM
341 
WWUS53 KGRB 072256
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
556 PM CDT FRI JUL 7 2017

WIC071-072305-
/O.EXP.KGRB.TO.W.0008.000000T0000Z-170707T2300Z/
Manitowoc WI-
556 PM CDT FRI JUL 7 2017

...THE TORNADO WARNING FOR SOUTH CENTRAL MANITOWOC COUNTY WILL EXPIRE
AT 600 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

LAT...LON 4389 8790 4391 8786 4391 8775 4390 8769
      4389 8772
TIME...MOT...LOC 2255Z 326DEG 25KT 4384 8777 

$$

RDM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 7:16 PM CDTSpecial Weather StatementGRBFlorence44 min
Jul 6, 7:28 PM CDTSevere Thunderstorm WarningGRBFlorence62 min
Jul 6, 7:36 PM CDTSpecial Weather StatementGRBVilas39 min
Jul 6, 7:44 PM CDTSevere Thunderstorm WarningGRBWaushara61 min
Jul 6, 7:54 PM CDTSpecial Weather StatementGRBOneida51 min
Jul 6, 8:13 PM CDTSevere Thunderstorm WarningGRBFlorence, Forest, Marinette62 min
Jul 6, 8:16 PM CDTSpecial Weather StatementGRBOneida44 min
Jul 6, 8:32 PM CDTSpecial Weather StatementGRBOneida43 min
Jul 6, 8:37 PM CDTSpecial Marine WarningGRB113 min
Jul 6, 8:44 PM CDTSevere Thunderstorm WarningGRBWaushara31 min
Jul 6, 8:51 PM CDTSpecial Weather StatementGRBOneida39 min
Jul 6, 9:02 PM CDTSevere Thunderstorm WarningGRBDoor58 min
Jul 6, 9:07 PM CDTSevere Thunderstorm WarningGRBMarinette34 min
Jul 6, 9:11 PM CDTSpecial Weather StatementGRBForest49 min
Jul 6, 9:40 PM CDTSpecial Weather StatementGRBMarathon65 min
Jul 6, 9:47 PM CDTSpecial Weather StatementGRBMarinette43 min
Jul 6, 10:24 PM CDTSpecial Weather StatementGRBPortage, Wood51 min
Jul 6, 10:43 PM CDTSpecial Weather StatementGRBOutagamie62 min
Jul 6, 11:25 PM CDTSpecial Marine WarningGRB35 min
Jul 6, 11:31 PM CDTSpecial Weather StatementGRBCalumet44 min
Jul 6, 11:52 PM CDTSpecial Weather StatementGRBManitowoc38 min
Jul 7, 12:00 AM CDTSevere Thunderstorm WarningGRBWaushara27 min
Jul 7, 2:56 PM CDTSpecial Weather StatementGRBLanglade, Lincoln, Marathon79 min
Jul 7, 3:51 PM CDTSpecial Weather StatementGRBPortage, Shawano, Waupaca, Wood69 min
Jul 7, 4:03 PM CDTSpecial Weather StatementGRBBrown, Outagamie42 min
Jul 7, 4:18 PM CDTSpecial Weather StatementGRBMarathon72 min
Jul 7, 4:34 PM CDTSpecial Weather StatementGRBWaupaca41 min
Jul 7, 4:37 PM CDTSevere Thunderstorm WarningGRBWaupaca25 min
Jul 7, 4:44 PM CDTSevere Thunderstorm WarningGRBBrown, Calumet, Manitowoc46 min
Jul 7, 5:09 PM CDTSpecial Weather StatementGRBCalumet, Outagamie, Waupaca, Waushara, Winnebago81 min
Jul 7, 5:22 PM CDTSevere Thunderstorm WarningGRBManitowoc34 min
Jul 7, 5:28 PM CDTSpecial Marine WarningGRB92 min
Jul 7, 6:08 PM CDTSpecial Weather StatementGRBCalumet, Manitowoc82 min

Nearby

Tornado Warnings in Wisconsin, 2017Every tornado warning in 2017Tornadoes in 2017

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.