Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 56, NWS Twin Cities, MN

April 18, 2002Chippewa County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 18, 2002, 6:59 PM CDT for Chippewa County, Wisconsin. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 18, 2002, 6:59 PM CDT (23:59 UTC)
Expired
Apr 18, 2002, 7:30 PM CDT
In force
31 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Chippewa County, WI

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 18, 2:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 12.0 hours before the alert went out and 204 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 12:00Z on 2002-04-18Temperature 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, Minneapolis, MN at 12:00Z on 2002-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 745 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
1064 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
745 m²/s²
0-3 km storm-relative helicity
912 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 182359
SVRMSP
WIC017-190030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
659 PM CDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN

* UNTIL 730 PM CDT

* AT 659 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL 4 MILES SOUTHWEST OF BOYD...OR ABOUT 11 MILES EAST OF LAKE
  WISSOTA...MOVING NORTHEAST AT 45 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  BOYD.
  CADOTT.
  STANLEY.

LAT...LON 4489 9128 4488 9099 4509 9059 4527 9093

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 3:52 AM CDTSevere Thunderstorm WarningMPXPierce, Saint Croix53 min
Apr 18, 4:49 AM CDTSevere Thunderstorm WarningMPXBarron, Dunn41 min
Apr 18, 5:24 AM CDTTornado WarningMPXDunn21 min
Apr 18, 5:36 AM CDTSevere Thunderstorm WarningMPXBarron24 min
Apr 18, 5:42 AM CDTSevere Thunderstorm WarningMPXChippewa33 min
Apr 18, 4:12 PM CDTSevere Thunderstorm WarningMPXChippewa63 min
Apr 18, 4:20 PM CDTSevere Thunderstorm WarningMPXEau Claire, Pepin40 min
Apr 18, 4:28 PM CDTSevere Thunderstorm WarningMPXDunn32 min
Apr 18, 4:57 PM CDTSevere Thunderstorm WarningMPXEau Claire63 min
Apr 18, 5:34 PM CDTSevere Thunderstorm WarningMPXRusk26 min
Apr 18, 5:57 PM CDTSevere Thunderstorm WarningMPXEau Claire63 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.