Alert archive / Iowa / Tornado Warnings in 2002

Tornado Warning 21, NWS Des Moines, IA

June 21, 2002Butler County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 21, 2002, 2:13 PM CDT for Butler County, Iowa. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 21, 2002, 2:13 PM CDT (19:13 UTC)
Expired: Jun 21, 2002, 2:45 PM CDT
In force: 32 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Butler County, IA

The radar

The Des Moines radar (KDMX), 135 km from the middle of the area, began a volume at 19:16 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 7.2 hours before the alert went out and 226 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: 1599 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1128 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 31 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 
WFUS53 KDMX 211913
TORDSM
IAC023-211945-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
213 PM CDT FRI JUN 21 2002

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN BUTLER COUNTY IN NORTH CENTRAL IOWA

* UNTIL 245 PM CDT

* AT 207 PM...SPOTTERS REPORTED A TORNADO OVER NORTHEASTERN       
  BUTLER COUNTY ABOUT 4.5 MILES EAST OF GREENE...OR ABOUT 32 MILES 
  NORTHWEST OF WATERLOO...MOVING EAST AT 15 MPH.

* THE STORM WILL BE...
  IN RURAL AREAS OF
  NORTHEASTERN BUTLER COUNTY.

THIS IS A HAZARDOUS SITUATION. SEEK SHELTER IN A BASEMENT...OR IN AN
INTERIOR ROOM. STAY AWAY FROM WINDOWS. IF YOU ARE OUTSIDE OR IN A
CAR...SEEK SHELTER IN A REINFORCED BUILDING.

THIS TORNADO WARNING REPLACES THE TORNADO WARNING THAT WAS ISSUED FOR
BUTLER COUNTY UNTIL 215 PM.

KINNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:21 PM CDT	Severe Thunderstorm Warning	DMX	Story	54 min
Jun 20, 8:05 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Webster	55 min
Jun 20, 8:30 PM CDT	Tornado Warning	DMX	Webster	45 min
Jun 20, 8:32 PM CDT	Tornado Warning	DMX	Webster	43 min
Jun 20, 9:23 PM CDT	Severe Thunderstorm Warning	DMX	Webster	47 min
Jun 20, 9:40 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	50 min
Jun 20, 9:54 PM CDT	Tornado Warning	DMX	Crawford	51 min
Jun 20, 10:53 PM CDT	Severe Thunderstorm Warning	DMX	Webster	52 min
Jun 21, 1:07 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo	38 min
Jun 21, 1:22 PM CDT	Tornado Warning	DMX	Butler	53 min

Nearby

Tornado Warnings in Iowa, 2002 Every tornado warning in 2002 Tornadoes in 2002

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; radar from the NEXRAD Level II archive.