Alert archive / Iowa / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 5, NWS Des Moines, IA

March 8, 2002Warren County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Mar 8, 2002, 11:29 PM CST for Warren County, Iowa. It was in force for 46 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 8, 2002, 11:29 PM CST (05:29 UTC)
Expired: Mar 9, 2002, 12:15 AM CST
In force: 46 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Warren County, IA

The radar

The Des Moines radar (KDMX), 47 km from the middle of the area, began a volume at 05:30 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.

What was reported inside it

Time	Report	Where	Remark
Mar 8, 11:40 PM CST	Thunderstorm Wind 54 E	Indianola, IA
Mar 8, 11:55 PM CST	Thunderstorm Wind 70 E	Hartford, 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

Omaha, NE (KOAX), launched 00:00Z, 5.5 hours before the alert went out and 229 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: 8 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 412 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 348 m²/s²
0-3 km storm-relative helicity: 457 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDMX 090529
SVRDSM
IAC181-090615-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1129 PM CST FRI MAR 8 2002

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

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

* UNTIL 1215 AM CST

* AT 1125 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 16 MILES SOUTHWEST OF INDIANOLA...OR ABOUT 29
  MILES SOUTH OF DES MOINES...MOVING NORTHEAST AT 75 MPH.

* THE SEVERE THUNDERSTORM WILL BE...

  NEAR INDIANOLA AROUND 1135 PM AND
  6 MILES SOUTHEAST OF CARLISLE AROUND 1145 PM.

OTHER WARNING LOCATIONS INCLUDE CARLISLE AND NORWALK

DAMAGING WINDS OF 60 TO 70 MILES AN HOUR ARE LIKELY IN THE WARNED
AREA.

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

LAT...LON 4120 9383 4118 9336 4151 9334 4150 9377

KULA

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 8, 10:06 PM CST	Severe Thunderstorm Warning	DMX	Adair, Guthrie	29 min
Mar 8, 10:34 PM CST	Severe Thunderstorm Warning	DMX	Ringgold, Union	41 min
Mar 8, 10:53 PM CST	Severe Thunderstorm Warning	DMX	Clarke, Decatur	32 min
Mar 8, 11:18 PM CST	Severe Thunderstorm Warning	DMX	Lucas, Wayne	42 min
Mar 8, 11:46 PM CST	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk	44 min
Mar 8, 11:58 PM CST	Severe Thunderstorm Warning	DMX	Appanoose, Monroe	47 min
Mar 9, 12:13 AM CST	Severe Thunderstorm Warning	DMX	Mahaska, Poweshiek, Tama	47 min
Mar 9, 12:20 AM CST	Severe Thunderstorm Warning	DMX	Davis, Wapello	40 min
Mar 9, 12:28 AM CST	Severe Thunderstorm Warning	DMX	Grundy, Marshall, Tama	47 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2002 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.