Alert archive / Iowa / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 7, NWS La Crosse, WI

April 18, 2002Fayette County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Apr 18, 2002, 2:22 AM CDT for Fayette County, Iowa. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 18, 2002, 2:22 AM CDT (07:22 UTC)
Expired: Apr 18, 2002, 3:00 AM CDT
In force: 38 min
Issued by: NWS La Crosse, WI
Area: Counties, with a storm outline in the text

County Fayette County, IA

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 18, 1:00 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 7.4 hours before the alert went out and 192 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: 3095 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 340 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 KARX 180722
SVRLSE
IAC065-180800-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
222 AM CDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FAYETTE COUNTY IN NORTHEAST IOWA

* UNTIL 300 AM CDT

* AT 222 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER HAWKEYE...OR ABOUT 8 MILES WEST OF WEST
  UNION...MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM IS EXPECTED TO BE...
  NEAR ELGIN AT 235 AM CDT...
  NEAR CLERMONT AT 240 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.

LAT...LON 4308 9208 4286 9208 4291 9162 4308 9161

MW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 1:30 AM CDT	Severe Thunderstorm Warning	ARX	Fayette	30 min
Apr 18, 1:47 AM CDT	Severe Thunderstorm Warning	ARX	Winneshiek	58 min
Apr 18, 2:48 AM CDT	Severe Thunderstorm Warning	ARX	Chickasaw	42 min
Apr 18, 2:50 AM CDT	Severe Thunderstorm Warning	ARX	Allamakee	55 min
Apr 18, 2:58 AM CDT	Severe Thunderstorm Warning	ARX	Fayette	47 min
Apr 18, 3:29 AM CDT	Severe Thunderstorm Warning	ARX	Howard	46 min
Apr 18, 3:49 AM CDT	Severe Thunderstorm Warning	ARX	Winneshiek	56 min
Apr 18, 4:01 AM CDT	Severe Thunderstorm Warning	ARX	Allamakee	44 min
Apr 18, 4:31 PM CDT	Severe Thunderstorm Warning	ARX	Floyd	44 min
Apr 18, 4:57 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw	63 min
Apr 18, 5:25 PM CDT	Tornado Warning	ARX	Chickasaw	50 min
Apr 18, 5:49 PM CDT	Severe Thunderstorm Warning	ARX	Fayette, Winneshiek	56 min
Apr 18, 5:53 PM CDT	Tornado Warning	ARX	Howard, Winneshiek	67 min
Apr 18, 6:31 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	59 min
Apr 18, 6:34 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw	41 min
Apr 18, 6:49 PM CDT	Severe Thunderstorm Warning	ARX	Winneshiek	56 min

Nearby

Severe Thunderstorm Warnings in Iowa, 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; the sounding from the Mesonet's radiosonde archive.