Alert archive / Iowa / Tornado Warnings in 2001

Tornado Warning 29, NWS Des Moines, IA

May 1, 2001Carroll County, Greene County, Guthrie County, Iowa

NWS Des Moines, IA issued this tornado warning at May 1, 2001, 7:35 PM CDT for Carroll County, Greene County, Guthrie County, Iowa. It was in force for 30 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 1, 2001, 7:35 PM CDT (00:35 UTC)
Expired: May 1, 2001, 8:05 PM CDT
In force: 30 min
Issued by: NWS Des Moines, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Carroll County, IA, Greene County, IA, Guthrie 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 1, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.6 hours before the alert went out and 155 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: 1236 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 2701 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 020035
TORDSM
IAC027-073-077-020105-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
735 PM CDT TUE MAY 1 2001

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN CARROLL COUNTY IN WEST CENTRAL IOWA
  SOUTHWESTERN GREENE COUNTY IN WEST CENTRAL IOWA
  NORTHWESTERN GUTHRIE COUNTY IN WEST CENTRAL IOWA

* UNTIL 805 PM CDT

* AT 732 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 5 MILES WEST OF COON RAPIDS...OR ABOUT 55 MILES SOUTHWEST
  OF FORT DODGE...MOVING EAST AT 20 MPH.

* THE TORNADO WILL BE...
  RURAL SECTIONS OF SOUTHEASTERN CARROLL AND NORTHWESTERN GUTHRIE COUNTIES
  NEAR COON RAPIDS AROUND 740 PM

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE.

LAT...LON 4195 9477 4175 9475 4177 9452 4197 9453

COGIL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 8:04 PM CDT	Tornado Warning	DMX	Guthrie	31 min
May 1, 8:48 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	42 min
May 1, 9:25 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	40 min
May 1, 9:38 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	32 min
May 1, 10:04 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	26 min
May 1, 10:44 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	41 min
May 1, 10:48 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	32 min
May 2, 1:50 AM CDT	Flash Flood Warning	DMX	Calhoun, Sac	3 hr

Nearby

Tornado Warnings in Iowa, 2001 Every tornado warning in 2001 Tornadoes 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.