Alert archive / Iowa / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 101, NWS Des Moines, IA

May 9, 2001Hamilton County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 9, 2001, 9:14 PM CDT for Hamilton County, Iowa. It was in force for 31 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 9, 2001, 9:14 PM CDT (02:14 UTC)
Expired: May 9, 2001, 9:45 PM CDT
In force: 31 min
Issued by: NWS Des Moines, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Hamilton 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 9, 4:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.2 hours before the alert went out and 257 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: 1368 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 2240 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDMX 100214
SVRDSM
IAC079-100245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
914 PM CDT WED MAY 9 2001

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN HAMILTON COUNTY IN CENTRAL IOWA

* UNTIL 945 PM CDT

* AT 912 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER JEWELL...OR ABOUT 26 MILES SOUTHEAST OF
  FORT DODGE...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR JEWELL AROUND 920 PM

HAIL UP TO THE SIZE OF NICKELS IS LIKELY IN THE WARNED AREA.

VERY STRONG WINDS UP TO 60 MPH ARE LIKELY IN THE WARNED AREA.

SEEK A STURDY SHELTER SUCH AS A BASEMENT OR INTERIOR ROOM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM WEDNESDAY
EVENING FOR WESTERN IOWA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 200 AM THURSDAY MORNING FOR SOUTHWESTERN IOWA.

LAT...LON 4248 9371 4223 9373 4225 9347 4254 9351

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:06 PM CDT	Severe Thunderstorm Warning	DMX	Sac	29 min
May 9, 7:31 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto, Pocahontas	39 min
May 9, 8:12 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	18 min
May 9, 8:32 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	38 min
May 9, 8:57 PM CDT	Severe Thunderstorm Warning	DMX	Guthrie	28 min
May 9, 10:20 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Tama	30 min
May 9, 10:41 PM CDT	Severe Thunderstorm Warning	DMX	Cass	29 min
May 9, 10:51 PM CDT	Severe Thunderstorm Warning	DMX	Tama	29 min
May 10, 12:20 AM CDT	Severe Thunderstorm Warning	DMX	Cass	30 min
May 10, 3:44 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	46 min
May 10, 3:58 PM CDT	Severe Thunderstorm Warning	DMX	Butler	32 min
May 10, 4:05 PM CDT	Tornado Warning	DMX	Hardin	30 min
May 10, 4:06 PM CDT	Severe Thunderstorm Warning	DMX	Greene	29 min
May 10, 4:33 PM CDT	Severe Thunderstorm Warning	DMX	Boone	47 min
May 10, 4:34 PM CDT	Severe Thunderstorm Warning	DMX	Grundy	41 min
May 10, 4:35 PM CDT	Severe Thunderstorm Warning	DMX	Greene	30 min
May 10, 4:37 PM CDT	Tornado Warning	DMX	Greene	28 min
May 10, 4:56 PM CDT	Tornado Warning	DMX	Boone	29 min
May 10, 5:01 PM CDT	Tornado Warning	DMX	Marshall	19 min
May 10, 5:03 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	42 min
May 10, 5:05 PM CDT	Severe Thunderstorm Warning	DMX	Greene	40 min
May 10, 5:07 PM CDT	Tornado Warning	DMX	Grundy	13 min
May 10, 5:12 PM CDT	Severe Thunderstorm Warning	DMX	Butler	28 min
May 10, 5:15 PM CDT	Tornado Warning	DMX	Greene, Guthrie	40 min
May 10, 5:19 PM CDT	Tornado Warning	DMX	Tama	31 min
May 10, 5:25 PM CDT	Tornado Warning	DMX	Boone, Story	45 min
May 10, 5:39 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	46 min
May 10, 5:39 PM CDT	Tornado Warning	DMX	Tama	31 min
May 10, 5:50 PM CDT	Severe Thunderstorm Warning	DMX	Story	30 min
May 10, 5:54 PM CDT	Tornado Warning	DMX	Guthrie	41 min
May 10, 6:05 PM CDT	Tornado Warning	DMX	Marshall	40 min
May 10, 6:11 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	39 min
May 10, 6:24 PM CDT	Tornado Warning	DMX	Jasper	31 min
May 10, 6:27 PM CDT	Tornado Warning	DMX	Dallas	43 min
May 10, 6:38 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	42 min
May 10, 6:43 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	42 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.