Alert archive / Iowa / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 125, NWS Des Moines, IA

May 10, 2001Madison County, Warren County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 10, 2001, 8:01 PM CDT for Madison County, Warren County, Iowa. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 10, 2001, 8:01 PM CDT (01:01 UTC)
Expired: May 10, 2001, 8:40 PM CDT
In force: 39 min
Issued by: NWS Des Moines, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Madison County, IA, Warren 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
May 10, 4:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.0 hours before the alert went out and 207 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: 979 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 922 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 255 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

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

142 
WUUS53 KDMX 110102
SVRDSM
IAC121-181-110140-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
801 PM CDT THU MAY 10 2001

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MADISON COUNTY IN SOUTH CENTRAL IOWA
  SOUTHERN WARREN COUNTY IN SOUTH CENTRAL IOWA

* UNTIL 840 PM CDT

* AT 758 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 15 MILES WEST OF INDIANOLA...OR ABOUT 23 MILES
  SOUTHWEST OF DES MOINES...MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
IN RURAL SOUTHWESTERN WARREN COUNTY AROUND 810 PM
IN RURAL SOUTHEASTERN MADISON COUNTY AROUND 810 PM
IN RURAL SOUTHERN WARREN COUNTY AROUND 830 PM

STAY AWAY FROM WINDOWS DURING A SEVERE STORM...WIND GUSTS OVER 70 MPH
COULD BLOW THEM OUT.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM THURSDAY
EVENING FOR IOWA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT
UNTIL 1000 PM THURSDAY EVENING FOR SOUTHWEST IOWA.

LAT...LON 4132 9425 4116 9426 4117 9334 4137 9334

JAJ/FAB

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.

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 10, 3:30 PM CDT, 4 hours 31 minutes earlier.

Area forecast discussion, May 10, 3:30 PM CDT, 4 hours 31 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
330 PM CDT THU MAY 10 2001

IN THE SHORT TERM...EAST TO WEST OUTFLOW BOUNDARY ALONG HIGHWAY 20
NOW BEGINNING TO LIGHT UP WHILE ADDITIONAL DEVELOPMENT EXPECTED
FURTHER WEST ALONG COLD FRONT. ATMOSPHERE OVER SOUTHWEST IOWA SHOULD
HAVE WARMED ENOUGH TO ELIMINATE WEAK CAP SHOWN ON 18Z OMA SOUNDING.
LCL HAVE LOWERED CONSIDERABLY FROM YESTERDAY...THROUGH THEY STILL
REMAIN FAIRLY HIGH AT AROUND 5.5K FT. SURFACE WINDS IN WARM SECTOR
HAVE VEERED SO IT APPEARS MAIN THREAT FROM STORMS WILL CONTINUE TO
BE HAIL/WIND. SOME ROTATING STORMS MAY BE A LITTLE MORE LIKELY ALONG
THE OUTFLOW BOUNDARY TO THE NORTH OR NEAR OUTFLOW/FRONTAL
INTERSECTION. AS SHORT WAVE TROUGH MOVES THROUGH CWA THIS EVENING...
CONVECTION SHOULD BE SHUNTED OFF INTO N MO AND SE IA BY OR AROUND
MIDNIGHT.

MOST OF THE FRONTAL CONVECTION SHOULD BE S OF THE CWA FRIDAY SO WILL
MAINTAIN A DRY FORECAST.

MODELS SHOWING SOME POSSIBILITY OF WARM AIR ADVECTION SHOWERS/STORMS
SATURDAY. WILL HOLD OFF ON ADDITION OF POPS ACROSS THE NORTH FOR NOW
AND LET ANOTHER MODEL RUN OR TWO PASS TO GET A BETTER HANDLE ON
THAT. HAVE LEFT EXTENDEDQ UNCHANGED.

MOS TEMPS LOOK PRETTY GOOD AND ARE IN LINE WITH CURRENT FORECASTS.

.DSM...NONE

JAW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:08 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	32 min
May 10, 7:20 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	40 min
May 10, 7:29 PM CDT	Severe Thunderstorm Warning	DMX	Madison, Warren	41 min
May 10, 7:33 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	42 min
May 10, 7:59 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	41 min
May 10, 8:10 PM CDT	Tornado Warning	DMX	Marion	30 min
May 10, 8:23 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas	42 min
May 10, 8:26 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	19 min
May 10, 8:35 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska	40 min
May 10, 8:42 PM CDT	Severe Thunderstorm Warning	DMX	Warren	18 min
May 10, 9:06 PM CDT	Severe Thunderstorm Warning	DMX	Clarke	19 min
May 10, 9:10 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	40 min
May 10, 9:16 PM CDT	Severe Thunderstorm Warning	DMX	Lucas	39 min

Nearby

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

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.