Alert archive / Wisconsin / Tornado Warnings in 1998

Tornado Warning 12, NWS Twin Cities, MN

March 29, 1998Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Mar 29, 1998, 6:37 PM CST for Eau Claire County, Wisconsin. It was in force for 53 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
Mar 29, 1998, 6:37 PM CST (00:37 UTC)
Expired
Mar 29, 1998, 7:30 PM CST
In force
53 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Eau Claire County, WI

The radar

The La Crosse radar (KARX), 101 km from the middle of the area, began a volume at 00:39 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.

IssuedProductOfficeLasted
Mar 29, 2:00 PM CSTTornado WatchSPC6 hr
Mar 29, 2:45 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.6 hours before the alert went out and 183 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 1998-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 625 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 1998-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 499 square meters per square second.1939587897117Sfc1 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
625 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
529 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
499 m²/s²
0-3 km storm-relative helicity
565 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 300040
TORMSP
WIC035-300130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
637 PM CST SUN MAR 29 1998


* TORNADO WARNING FOR
  EAU CLAIRE COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 730 PM CST

* SOME LOCATIONS AFFECTED
    EAU CLAIRE
    ALTOONA
    BRACKETT
    CLEGHORN

* AT 636 PM CST DOPPLER RADAR DETECTED A POSSIBLE TORNADO 10 MILES
  SOUTHWEST OF EAU CLAIRE.  THE STORM WAS MOVING EAST-NORTHEAST AT
  25 MPH.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 29, 7:07 PM CSTSevere Thunderstorm WarningMPXPierce63 min

Nearby

Tornado Warnings in Wisconsin, 1998Every tornado warning in 1998Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.