Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 322, NWS Twin Cities, MN

September 2, 2002Dunn County, Pepin County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 2, 2002, 12:35 AM CDT for Dunn County, Pepin County, Wisconsin. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 2, 2002, 12:35 AM CDT (05:35 UTC)
Expired
Sep 2, 2002, 1:15 AM CDT
In force
40 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Dunn County, WI, Pepin County, WI

The radar

The La Crosse radar (KARX), 119 km from the middle of the area, began a volume at 05:35 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.6 hours before the alert went out and 125 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, Minneapolis, MN at 00:00Z on 2002-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 905 joules per kilogram.LCLLFCEL10008507005003002001001 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, Minneapolis, MN at 00:00Z on 2002-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 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
905 J/kg
Mixed-layer CIN
-145 J/kg
Mixed-layer LCL
1277 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

009 
WUUS53 KMPX 020535
SVRMSP
WIC033-091-020615-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1234 AM CDT MON SEP 2 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN
  PEPIN COUNTY IN WEST CENTRAL WISCONSIN

* UNTIL 115 AM CDT

* AT 1234 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL AND DAMAGING WINDS 10 MILES WEST OF DURAND...MOVING SOUTHEAST
  AT 30 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  DURAND
  PEPIN
  DOWNEVILLE
  EAU GALLE.

THIS IS A DANGEROUS STORM WITH DAMAGING WINDS...STAY INDOORS AWAY
FROM WINDOWS.

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 1, 11:40 PM CDTSevere Thunderstorm WarningMPXDunn, Pepin, Pierce, Saint Croix50 min
Sep 1, 11:43 PM CDTSevere Thunderstorm WarningMPXChippewa, Eau Claire47 min
Sep 2, 3:55 PM CDTSevere Thunderstorm WarningMPXRusk65 min
Sep 2, 4:37 PM CDTTornado WarningMPXRusk38 min
Sep 2, 4:42 PM CDTSevere Thunderstorm WarningMPXChippewa48 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2002Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.