Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 16, NWS Twin Cities, MN

March 29, 1998Dunn County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Mar 29, 1998, 4:09 PM CST for Dunn County, Wisconsin. It was in force for 46 min. 1 report 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: Mar 29, 1998, 4:09 PM CST (22:09 UTC)
Expired: Mar 29, 1998, 4:55 PM CST
In force: 46 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Dunn County, WI

The radar

The Minneapolis radar (KMPX), 132 km from the middle of the area, began a volume at 22:11 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
Mar 29, 4:30 PM CST	Hail 1	Boyceville, 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
Mar 29, 11:00 AM CST	Severe Thunderstorm Watch	SPC	6 hr
Mar 29, 2:45 PM CST	Tornado Watch	SPC	6 hr
Mar 29, 3:15 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.2 hours before the alert went out and 135 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: 551 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 251 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 
TTAA00 KMSP 292209
SVRMSP
WIC033-292255-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
409 PM CST SUN MAR 29 1998


* SEVERE THUNDERSTORM WARNING FOR
  NORTHERN DUNN COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 455 PM CST

* SOME LOCATIONS AFFECTED
    BOYCEVILLE
    CONNORSVILLE
    DOWNING
    RIDGELAND

* AT 410 PM CST DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL RURAL AREAS SOUTHWEST OF KNAPP OR ABOUT 10 MILES WEST OF
  MENOMONIE.  THE STORM WAS MOVING NORTHEAST AT 35 MPH.

THIS IS A DANGEROUS STORM...WITH LARGE HAIL.  STAY INDOORS AWAY
FROM WINDOWS.  A TORNADO MAY DEVELOP WITH THIS THUNDERSTORM SO BE
PREPARED TO QUICKLY LSEEK SHELTER.

MBK

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 3:32 PM CST	Severe Thunderstorm Warning	MPX	Pierce	63 min
Mar 29, 3:49 PM CST	Severe Thunderstorm Warning	MPX	Polk, Saint Croix	56 min
Mar 29, 4:19 PM CST	Tornado Warning	MPX	Dunn	41 min
Mar 29, 4:43 PM CST	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Rusk	62 min
Mar 29, 4:53 PM CST	Severe Thunderstorm Warning	MPX	Polk	37 min
Mar 29, 5:02 PM CST	Tornado Warning	MPX	Pepin	28 min
Mar 29, 5:28 PM CST	Tornado Warning	MPX	Dunn	47 min
Mar 29, 5:36 PM CST	Severe Thunderstorm Warning	MPX	Eau Claire	39 min
Mar 29, 5:55 PM CST	Severe Thunderstorm Warning	MPX	Chippewa	65 min
Mar 29, 5:58 PM CST	Severe Thunderstorm Warning	MPX	Dunn, Pepin, Pierce	47 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1998 Every severe thunderstorm warning in 1998

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.