Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 89, NWS La Crosse, WI

June 18, 2001Grant County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 18, 2001, 4:35 AM CDT for Grant County, Wisconsin. It was in force for 55 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
Jun 18, 2001, 4:35 AM CDT (09:35 UTC)
Expired
Jun 18, 2001, 5:30 AM CDT
In force
55 min
Issued by
NWS La Crosse, WI
Area
Whole counties

County Grant County, WI

The radar

The La Crosse radar (KARX), 113 km from the middle of the area, began a volume at 09:35 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

TimeReportWhereRemark
Jun 18, 4:45 AM CDTHail 1Lancaster, 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.

IssuedProductOfficeLasted
Jun 18, 1:30 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 9.6 hours before the alert went out and 140 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, Davenport, at 00:00Z on 2001-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1681 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2001-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.19395878Sfc1 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
1681 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1616 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.2

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KARX 180936
SVRLSE

WIC043-181030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
435 AM CDT MON JUN 18 2001

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRANT COUNTY IN SOUTHWEST WISCONSIN

* UNTIL 530 AM CDT

* AT 435 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING LARGE HAIL 2 MILES WEST OF
  LANCASTER...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM IS EXPECTED TO BE...
  OVER RURAL GRANT COUNTY AT 450 AM CDT

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 
55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VxERY HEAVY RAIN. FOR
YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS.

$$

BOYNE

LAT...LON 4292 9084 4275 9078 4289 8970 4315 8978

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 17, 8:02 PM CDTSevere Thunderstorm WarningARXBuffalo58 min
Jun 17, 8:37 PM CDTTornado WarningARXBuffalo53 min
Jun 17, 8:56 PM CDTSevere Thunderstorm WarningARXTrempealeau49 min
Jun 17, 9:08 PM CDTSevere Thunderstorm WarningARXJackson67 min
Jun 17, 9:15 PM CDTSevere Thunderstorm WarningARXAdams, Juneau60 min
Jun 17, 9:30 PM CDTSevere Thunderstorm WarningARXBuffalo60 min
Jun 17, 9:36 PM CDTFlash Flood WarningARXBuffalo3 hr
Jun 17, 9:55 PM CDTSevere Thunderstorm WarningARXMonroe65 min
Jun 17, 10:07 PM CDTSevere Thunderstorm WarningARXTrempealeau53 min
Jun 17, 10:32 PM CDTSevere Thunderstorm WarningARXLa Crosse58 min
Jun 17, 10:47 PM CDTSevere Thunderstorm WarningARXJuneau58 min
Jun 17, 11:14 PM CDTSevere Thunderstorm WarningARXMonroe61 min
Jun 17, 11:28 PM CDTSevere Thunderstorm WarningARXAdams32 min
Jun 17, 11:31 PM CDTSevere Thunderstorm WarningARXVernon59 min
Jun 18, 1:19 AM CDTSevere Thunderstorm WarningARXVernon56 min
Jun 18, 1:35 AM CDTSevere Thunderstorm WarningARXRichland55 min
Jun 18, 6:03 AM CDTSevere Thunderstorm WarningARXLa Crosse57 min
Jun 18, 6:06 AM CDTSevere Thunderstorm WarningARXTrempealeau54 min
Jun 18, 6:50 AM CDTSevere Thunderstorm WarningARXTrempealeau20 min
Jun 18, 7:15 AM CDTSevere Thunderstorm WarningARXClark60 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2001Every severe thunderstorm warning in 2001

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.