Severe Thunderstorm Warning 56, NWS Des Moines, IA

Issued

Apr 11, 2001, 4:31 PM CDT (21:31 UTC)

Expired

Apr 11, 2001, 5:15 PM CDT

In force

44 min

Issued by

NWS Des Moines, IA

Area

Whole counties; the outline is the Mesonet’s reconstruction

Counties Butler County, IA, Grundy County, IA

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.

813 
WUUS53 KDMX 112131
SVRDSM
IAC023-075-112215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
431 PM CDT WED APR 11 2001

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRUNDY COUNTY IN CENTRAL IOWA
  BUTLER COUNTY IN NORTH CENTRAL IOWA

* UNTIL 515 PM CDT

* AT 429 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
  OF SEVERE THUNDERSTORMS FROM 18 MILES WEST OF ALLISON TO 9 MILES
  SOUTHEAST OF GRUNDY CENTER...OR FROM 24 MILES SOUTH OF MASON CITY
  TO 25 MILES SOUTHWEST OF WATERLOO...MOVING NORTHEAST AT 60 MPH.

* SEVERE THUNDERSTORMS WILL BE...
  NEAR ALLISON...PARKERSBURG AROUND 440 PM
  NEAR CLARKSVILLE...SHELL ROCK AROUND 450 PM

DAMAGING WINDS OF 60 TO 70 MILES AN HOUR ARE LIKELY IN THE WARNED 
AREA.  STRAIGHT-LINE WINDS OVER 75 MPH CAN SOUND JUST LIKE A TORNADO 
AND CAUSE JUST AS MUCH DAMAGE.

A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM WEDNESDAY 
EVENING FOR PARTS OF NORTHERN AND EASTERN IOWA.

LAT...LON 4254 9299 4227 9299 4232 9257 4289 9258
          4289 9301

COGIL

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 11, 2:50 PM CDT, 1 hour 41 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
250 PM CDT WED APR 11 2001

SVR WX WITH NO SIG TIME.  LAST LN ABT TO MOV THRU DSM ATTM AND WL
LFT NE OF CWA THIS EVE.  STG SLY WINDS BCMG W-NW POST DRY SLOT.  WL
GO WND ADVY TNGT THRU THU, THO CUD SEE WNDS DMSH THU AFTN.  NXT WK
SYS FRI NGT, AFT THAT A SAT NGT INTO SUN WK EVENT.  OPTED WITH MAV
GUID.
DSM 22-13   ALO 63-14

.DSM...WND ADVY ALL ZONES TNGT AND THU
MS APR 01

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

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.