Severe Thunderstorm Warning 152, NWS Des Moines, IA

Issued

May 30, 1998, 12:10 PM CDT (17:10 UTC)

Expired

May 30, 1998, 1:00 PM CDT

In force

50 min

Issued by

NWS Des Moines, IA

Area

Whole counties

County Calhoun 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.

000 
TTAA00 KDSM 301710 RRA
SVRDSM
IAC025-301800-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1210 PM CDT SAT MAY 30 1998

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN WEST CENTRAL IOWA

* UNTIL 100 PM CDT

* AT 1209 PM CDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 33
  MILES WEST OF FORT DODGE OR 6 MILES WEST SOUTHWEST OF JOLLEY
  MOVING EAST NORTHEAST AT 40 MPH.

* THIS STORM CAN BE EXPECTED NEAR...
   ROCKWELL CITY      BY 1212 PM CDT
   POMEROY            BY 1216 PM CDT
   MANSON             BY 1223 PM CDT
   KNIERIM            BY 1224 PM CDT

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

FAB

In the hours before

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-310130-

CENTRAL IOWA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
1032 AM CDT SAT MAY 30 1998

HAZARD--THUNDERSTORMS WITH LARGE HAIL...DAMAGING WINDS...VERY HEAVY
RAINFALL AND ISOLATED TORNADOES.

TIMING AND AREA OF CONCERN--THE PRIMARY THREAT FOR SEVERE WEATHER WILL
BE ALONG AND NORTH OF INTERSTATE 80 FROM NOON THROUGH EARLY EVENING.
A LESSER THREAT FOR SEVERE WEATHER WILL OCCUR SOUTH OF INTERSTATE 80
SOUTH TO THE IOWA/MISSOURI BORDER.

METEOROLOGICAL COMMENTS--A VERY UNSTABLE AIRMASS IS IN PLACE OVER IOWA
TODAY.  IN ADDITION...THERE IS A RICH SUPPLY OF MOISTURE ORIGINATING
FROM THE PACIFIC...KNOWN AS THE PINEAPPLE CONNECTION.  AS A SOUTHERLY
WIND INCREASES ACROSS THE STATE THEY WILL INTERACT WITH A NEARLY
STATIONARY FRONT EXTENDING ACROSS THE STATE FROM A DAVENPORT TO SIOUX
FALLS LINE.

LIFTED INDICES OF -8 TO -12 ARE FORECAST OVER THE STATE WITH CAPES
INCREASING TO ALMOST 5000 J/KG AND HELICITY VALUES IN THE 400 TO 500
RANGE.

PRECAUTIONS--EMERGENCY MANAGERS FOR COUNTIES ALONG AND NORTH OF
INTERSTATE 80 SHOULD PREPARE THEIR SPOTTER NETWORKS FOR DEPLOYMENT
AROUND OR JUST AFTER THE NOON HOUR.  EMERGENCY MANAGERS FOR COUNTIES
TO THE SOUTH OF INTERSTATE 80 SHOULD ALERT THEIR SPOTTERS FOR POSSIBLE
DEPLOYMENT LATER THIS AFTERNOON OR EVENING.

FAB

Severe Thunderstorm Warnings in Iowa, 1998Every severe thunderstorm warning in 1998

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.