Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 70, NWS Twin Cities, MN

May 5, 2002Dunn County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 5, 2002, 7:20 PM CDT for Dunn County, Wisconsin. It was in force for 40 min. 2 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: May 5, 2002, 7:20 PM CDT (00:20 UTC)
Expired: May 5, 2002, 8:00 PM CDT
In force: 40 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Dunn County, WI

The radar

The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 00:24 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

Time	Report	Where	Remark
May 5, 7:35 PM CDT	Hail 1.75	Boyceville, WI
May 5, 7:40 PM CDT	Hail 1	Connorsville, 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 5, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.3 hours before the alert went out and 310 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1680 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 204 m²/s²
0-3 km storm-relative helicity: 393 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 060020
SVRMSP
WIC033-060100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
719 PM CDT SUN MAY 5 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 800 PM CDT

* AT 719 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL 6 MILES NORTHWEST OF BOYCEVILLE...OR ABOUT 18 MILES SOUTHEAST
  OF AMERY. THE STORM WAS MOVING EAST AT 45 MPH.  GOLFBALL SIZE HAIL
  WAS REPORTED AT GLENWOOD CITY AT 717 PM.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  DOWNING.
  BOYCEVILLE.
  COLFAX.
  MENOMONIE.
  WHEELER.

THIS IS A DANGEROUS STORM WITH LARGE HAIL...STAY INDOORS AWAY FROM
WINDOWS.

LAT...LON 4519 9214 4476 9208 4475 9173 4515 9168

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 7:34 PM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	41 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.