Alert archive / Iowa / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 53, NWS Des Moines, IA

May 24, 1996Mahaska County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 24, 1996, 10:28 AM CDT for Mahaska County, Iowa. It was in force for 32 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: May 24, 1996, 10:28 AM CDT (15:28 UTC)
Expired: May 24, 1996, 11:00 AM CDT
In force: 32 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Mahaska County, IA

What was reported inside it

Time	Report	Where	Remark
May 24, 10:30 AM CDT	Hail 0.75	Rose Hill, IA
May 24, 10:45 AM CDT	Thunderstorm Wind 50	Fremont, 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.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 3.5 hours before the alert went out and 181 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: 710 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 352 m²/s²
0-3 km storm-relative helicity: 374 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDSM 241527
SVRDSM
IAC123-241600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1028 AM CDT FRI MAY 24 1996

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHEASTERN MAHASKA COUNTY - SOUTHEAST IOWA

* UNTIL 1100 AM CDT
 
* SOME LOCATIONS AFFECTED
    CEDAR
    FREMONT
    WRIGHT

* AT 1025 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES
  NORTHWEST OF OTTUMWA OR NEAR THE TOWN OF CEDAR MOVING EAST AT 30
  MPH.

* THE STORM WILL BE INTO CEDAR WRIGHT AND FREMONT BY 10 30 AM CDT.

THIS IS A DANGEROUS STORM.  DO NOT GO OUTDOORS.




FORSTER

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.

In the hours before

Special weather statement, May 24, 9:03 AM CDT, 1 hour 25 minutes before

IAZ074-075-241440-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
903 AM CDT FRI MAY 24 1996

THE SEVERE THUNDERSTORM WARNING FOR NORTHEAST MARION AND NORTHERN
MAHASKA COUNTIES HAS BEEN CANCELLED.  THE STORM HAS WEAKEN.
NUMEROUS REPORTS WERE RECEIVED FROM NORTHEAST MARION COUNTY.

THREE MILES SOUTHWEST OF PELLA 3/4 TO 1 INCH HAIL...5 MILES NORTH OF
KNOXVILLE GOLFBALL SIZED HAIL...KNIA RADIO IN PELLA REPORTED ONE
INCH HAIL...AND 3.5 MILES NORTHEAST OF KNOXVILLE REPORTED ONE INCH
HAIL.

FORSTER

Special weather statement, May 24, 9:26 AM CDT, 1 hour 2 minutes before

IAZALL-241400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
925 AM CDT FRI MAY 24 1996

STRONG WINDS WERE BEING REPORTED IN PARTS OF NORTHWEST AND NORTH
CENTRAL IOWA.  IT APPEARS THAT STRONG WINDS ALOFT ARE BEING
TRANSPORTED DOWN TO THE SURFACE.

REPORTS OF 55 TO 60 MPH WINDS WERE REPORTED IN POCAHONTAS...CLAY
AND PALO ALTO COUNTIES.

PEOPLE IN SOUTHERN KOSSUTH...HUMBOLDT...NORTHEN WEBSTER CAN EXPECT
THESE STRONG SURFACE WINDS BETWEEN 930 AND 1030 AM CDT.

FORSTER

Special weather statement, May 24, 10:23 AM CDT, 5 minutes before

IAZ074-241600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1024 AM CDT FRI MAY 24 1996

THE SEVERE THUNDERSTORM WARNING FOR SOUTHEAST MARION COUNTY HAS
EXPIRED.  THE STORM HAS MOVED INTO MAHASKA WHERE NUMEROUS REPORTS OF
LARGE HAIL UP TO TENNIS BALL SIZE.  HOWEVER THE STORM WAS OUT OF
MARION COUNTY.

FORSTER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 8:31 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion	34 min
May 24, 9:17 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska	48 min
May 24, 9:45 AM CDT	Severe Thunderstorm Warning	DMX	Marion	35 min
May 24, 9:54 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska	31 min
May 24, 11:08 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion	47 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1996 Every severe thunderstorm warning in 1996

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.