Alert archive / Iowa / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 49, NWS Des Moines, IA

May 9, 1989Davis County, Van Buren County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 9, 1989, 12:02 AM CDT for Davis County, Van Buren County, Iowa. It was in force for 43 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: May 9, 1989, 12:02 AM CDT (05:02 UTC)
Expired: May 9, 1989, 12:45 AM CDT
In force: 43 min
Issued by: NWS Des Moines, IA
Area: Whole counties

Counties Davis County, IA, Van Buren County, IA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
May 9, 12:10 AM CDT	Hail 1.75	Davis, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Peoria Regional, IL (KPIA), launched 00:00Z, 5.0 hours before the alert went out and 218 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: 1379 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 224 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 
TTAA00 KDSM 090502
SVRDSM
IAC177-051-090545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE DES MOINES IA
1202 AM CDT TUE MAY 9 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1245 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTHEAST PART OF IOWA
      WESTERN VAN BUREN...EASTERN DAVIS

AT 1155 PM...A SEVERE THUNDERSTORM WAS LOCATED ABOUT 20 MILES
SOUTH OF OTTUMWA OR EAST OF BLOOMFIELD.

THE STORM WAS MOVING EAST AT 30 MILES AN HOUR.

REPORTS OF HALF INCH SIZE HAIL COVERED HIGHWAY 63 TO DEPTH OF
ONE INCH.

PEOPLE IN THE CITIES OF TROY...PULASKI...LEANDO...KEOSAUQUA...
MILTON AND CANTRIL SHOULD SEEK SHELTER IMMEDIATELY IF THREATENING
WEATHER APPROACH YOUR AREA.

REMEMBER...SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MILES
AN HOUR...LARGE HAIL...DANGEROUS LIGHTNING...AND VERY HEAVY RAINS.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOU HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

MCQUIRTER/MARTIN

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 8, 10:59 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	36 min
May 8, 11:30 PM CDT	Severe Thunderstorm Warning	DMX	Davis	30 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1989 Every severe thunderstorm warning in 1989

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.