Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 38, NWS Green Bay, WI

July 7, 1991Columbia County, Dane County, Sauk County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 7, 1991, 1:56 PM CDT for Columbia County, Dane County, Sauk County, Wisconsin. It was in force for 64 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 7, 1991, 1:56 PM CDT (18:56 UTC)
Expired
Jul 7, 1991, 3:00 PM CDT
In force
64 min
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Columbia County, WI, Dane County, WI, Sauk County, WI

What was reported inside it

TimeReportWhereRemark
Jul 7, 2:41 PM CDTThunderstorm Wind 0Sauk, WI
Jul 7, 2:45 PM CDTThunderstorm Wind 0Dane, WI
Jul 7, 3:05 PM CDTThunderstorm Wind 59Dane, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.9 hours before the alert went out and 174 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 1991-07-07Temperature 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 1991-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -67 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
1805 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
-67 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 1:45 PM CDTSevere Thunderstorm WarningGRBIowa, Richland60 min
Jul 7, 2:12 PM CDTSevere Thunderstorm WarningGRBAdams, Juneau48 min
Jul 7, 2:26 PM CDTTornado WarningGRBIowa, Sauk34 min
Jul 7, 2:41 PM CDTTornado WarningGRBColumbia, Dane34 min
Jul 7, 2:59 PM CDTTornado WarningGRBDane31 min
Jul 7, 3:07 PM CDTTornado WarningGRBDane33 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1991Every severe thunderstorm warning in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.