Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 91, NWS La Crosse, WI

June 18, 2001Trempealeau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jun 18, 2001, 6:06 AM CDT for Trempealeau County, Wisconsin. It was in force for 54 min. 2 reports 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, 6:06 AM CDT (11:06 UTC)
Expired: Jun 18, 2001, 7:00 AM CDT
In force: 54 min
Issued by: NWS La Crosse, WI
Area: Whole counties

County Trempealeau County, WI

The radar

The La Crosse radar (KARX), 55 km from the middle of the area, began a volume at 11:05 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
Jun 18, 6:09 AM CDT	Hail 0.75	Arcadia, WI
Jun 18, 7:06 AM CDT	Hail 0.75	Osseo, 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
Jun 18, 5:15 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.1 hours before the alert went out and 188 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: 38 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1536 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 289 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.

265 
WUUS53 KARX 181106
SVRLSE
WIC121-181200-

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

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 700 AM CDT

* AT 606 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 12 MILES SOUTHWEST OF BLAIR...OR ABOUT 4 MILES
  SOUTHEAST OF ARCADIA...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM IS EXPECTED TO BE...
  NEAR BLAIR AT 615 AM CDT...

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

$$

BOYNE

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS La Crosse, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 3:33 AM CDT, 2 hours 33 minutes earlier.

Area forecast discussion, Jun 18, 3:33 AM CDT, 2 hours 33 minutes before

AREA FORECAST DISCUSSION...UPDATED.
NATIONAL WEATHER SERVICE LA CROSSE WI
333 AM CDT MON JUN 18 2001

...MAIN FORECAST PROBLEM IS CONVECTION THIS MORNING AND AGAIN
TONIGHT...

SURFACE ANALYSIS SHOWS SEVERAL BOUNDARIES ACROSS THE REGION...MANY
OF WHICH CONTINUE TO SUPPORT ELEVATED CONVECTION.  MAIN COMPLEX
CURRENTLY ACROSS NORTHEAST IOWA/SOUTHWEST WISCONSIN IS MOVING TO
THE EAST.  THREAT EVOLVING FROM HAIL TO HEAVY RAIN.  IT IS
EXITING TO THE EAST...SO DO NOT ANTICIPATE ANY FLOODING AT THIS
TIME...UNLESS BACK BUILDING OCCURS.  UPON LATEST ANALYSIS...STORMS
SEEM TO BE EXITING...THEREFORE WILL HOLD OFF ON FLASH FLOOD WATCH.

LOCAL COMPLEX SHOULD DECAY THIS MORNING AFTER SUNRISE.  COMPLEX OVER
THE DAKOTAS SHOULD MOVE EAST AND MOVE INTO SOUTHWEST MINNESOTA EARLY
THIS MORNING.  THIS COMPLEX SHOULD MOVE INTO THE SOUTHEAST MINNESOTA
ZONES WHILE IT WEAKENS.  BY EARLY AFTERNOON...THE STORMS SHOULD BE
GONE...GIVING WAY TO CAPPING INVERSION IN BEHIND THE WARM FRONT
AS IT MOVES NORTH.  THIS WILL ALLOW GUSTY SOUTHWEST WINDS AND WARM
TEMPERATURES TO MOVE INTO THE FORECAST AREA.  WILL GO WELL ABOVE
GUIDANCE GIVEN THE MIXING EXPECTED AND 850 MB TEMPERATURES IN THE
MID 20S.

BY MID-AFTERNOON...WARM FRONT SHOULD BE NEAR KRGK-KISW.  NORTH OF
THIS BOUNDARY...SHOWERS AND THUNDERSTORMS MAY PERSIST ALL DAY DUE TO
PERSISTENT MOISTURE TRANSPORT.  HODOGRAPHS ACROSS THE FORECAST AREA
SHOULD EXHIBIT A GRADUAL CURVING STRONG SPEED SHEARING ATMOSPHERE.
ALSO...STRONG INSTABILITY WILL EXIST WITH MUCAPES APPROACHING 5000
J/KG.  WITH THE CAP IN PLACE...COLD FRONT WILL APPROACH THE FORECAST
AREA THIS EVENING.  ONCE STORM INITIATION OCCURS...STORMS WILL
INTENSIFY RAPIDLY...BECOMING SUPERCELLULAR.  SEVERE WEATHER THREAT
WILL BE LARGE HAIL...DAMAGING WIND AND TORNADOES.  EXPECT A HANDFUL
OF SUPERCELLS THIS EVENING...BECOMING MORE WIDESPREAD ONCE THE CAP
WEAKENS...MAINLY AFTER DARK.

CONVECTION WILL MOVE THROUGH THE FORECAST AREA TONIGHT ALONG THE
ADVANCING COLD FRONT.  COOLER AIR WILL MOVE INTO THE REGION...WITH
NO PRECIPITATION EXPECTED FOR THE REMAINDER OF THE SHORT RANGE
PERIOD.

COORDINATED WITH MPX/DMX/DVN/MKX/GRB.

.LSE...NONE'.

KRC

In the hours before

Special weather statement, Jun 18, 4:11 AM CDT, 1 hour 55 minutes before

IAZ008>011-018-019-029-030-MNZ086>088-094>096-WIZ041>044-053>055-061-
181000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
411 AM CDT MON JUN 18 2001

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELED FOR THE FOLLOWING
COUNTIES:

IN MINNESOTA
     FILLMORE...MOWER...DODGE...WINONA...HOUSTON AND OLMSTED

IN WISCONSIN
     VERNON...ADAMS...GRANT...LA CROSSE...RICHLAND...CRAWFORD...
     MONROE AND JUNEAU

IN IOWA
     CHICKASAW...FLOYD...WINNESHIEK...CLAYTON...FAYETTE...HOWARD...
     ALLAMAKEE AND MITCHELL

INCLUDING THE CITIES OF...WEST UNION...WAUKON...VIROQUA...
ROCHESTER...RICHLAND CENTER...PRESTON...PRAIRIE DU CHIEN...OSAGE...
NEW HAMPTON...MAUSTON...MANTORVILLE...LANSING...LANCASTER...LA
CROSSE...LA CRESCENT...GUTTENBERG...ELKADER...DODGE CENTER...
DECORAH...CRESCO...CHARLES CITY...CALEDONIA AND AUSTIN

THE CLUSTER OF THUNDERSTORMS WHICH PROMPTED THIS WATCH HAS MOVED
EAST OF THE AREA...THEREFORE...SEVERE THUNDERSTORM WATCH NUMBER 440
HAS BEEN CANCELLED FOR THE AFOREMENTIONED COUNTIES IN SOUTHEAST
MINNESOTA...NORTHEAST IOWA...AND SOUTHWEST WISCONSIN.

BOYNE

Local storm report, Jun 18, 6:04 AM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
604 AM CDT MON JUN 18 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION....

0600 AM    HOLMEN                    WI   0.75 INCH HAIL
06/18/01   LA CROSSE                      REPORTED BY NWS EMPLOYEE

KRC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 8:02 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	58 min
Jun 17, 8:37 PM CDT	Tornado Warning	ARX	Buffalo	53 min
Jun 17, 8:56 PM CDT	Severe Thunderstorm Warning	ARX	Trempealeau	49 min
Jun 17, 9:08 PM CDT	Severe Thunderstorm Warning	ARX	Jackson	67 min
Jun 17, 9:15 PM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	60 min
Jun 17, 9:30 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	60 min
Jun 17, 9:36 PM CDT	Flash Flood Warning	ARX	Buffalo	3 hr
Jun 17, 9:55 PM CDT	Severe Thunderstorm Warning	ARX	Monroe	65 min
Jun 17, 10:07 PM CDT	Severe Thunderstorm Warning	ARX	Trempealeau	53 min
Jun 17, 10:32 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse	58 min
Jun 17, 10:47 PM CDT	Severe Thunderstorm Warning	ARX	Juneau	58 min
Jun 17, 11:14 PM CDT	Severe Thunderstorm Warning	ARX	Monroe	61 min
Jun 17, 11:28 PM CDT	Severe Thunderstorm Warning	ARX	Adams	32 min
Jun 17, 11:31 PM CDT	Severe Thunderstorm Warning	ARX	Vernon	59 min
Jun 18, 1:19 AM CDT	Severe Thunderstorm Warning	ARX	Vernon	56 min
Jun 18, 1:35 AM CDT	Severe Thunderstorm Warning	ARX	Richland	55 min
Jun 18, 4:35 AM CDT	Severe Thunderstorm Warning	ARX	Grant	55 min
Jun 18, 6:03 AM CDT	Severe Thunderstorm Warning	ARX	La Crosse	57 min
Jun 18, 6:50 AM CDT	Severe Thunderstorm Warning	ARX	Trempealeau	20 min
Jun 18, 7:15 AM CDT	Severe Thunderstorm Warning	ARX	Clark	60 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2001 Every 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.