Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 233, NWS Twin Cities, MN

July 30, 2002Chippewa County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 30, 2002, 6:16 PM CDT for Chippewa County, Wisconsin. It was in force for 44 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: Jul 30, 2002, 6:16 PM CDT (23:16 UTC)
Expired: Jul 30, 2002, 7:00 PM CDT
In force: 44 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Chippewa County, WI

The radar

The La Crosse radar (KARX), 141 km from the middle of the area, began a volume at 23:19 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 30, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.3 hours before the alert went out and 189 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 767 J/kg
Mixed-layer CIN: -274 J/kg
Mixed-layer LCL: 2024 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 280 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

417 
WUUS53 KMPX 302316
SVRMSP
WIC017-310000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
615 PM CDT TUE JUL 30 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 700 PM CDT

* AT 615 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL AND DAMAGING WINDS 13 MILES SOUTHWEST OF CORNELL...OR ABOUT 7
  MILES NORTH OF CHIPPEWA FALLS...MOVING EAST AT 25 MPH.

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

THIS EXTENDS THE SEVERE THUNDERSTORM WARNING WHICH WAS IN EFFECT FOR 
CHIPPEWA COUNTY.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER
IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4513 9144 4496 9134 4498 9094 4525 9094

RAH/SEB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 4:30 PM CDT	Severe Thunderstorm Warning	MPX	Pierce, Saint Croix	30 min
Jul 30, 4:41 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	49 min
Jul 30, 5:19 PM CDT	Severe Thunderstorm Warning	MPX	Pepin	41 min
Jul 30, 5:30 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	45 min
Jul 30, 5:39 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	66 min
Jul 30, 6:02 PM CDT	Flash Flood Warning	MPX	Chippewa, Dunn, Eau Claire	88 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2002 Every 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.