Alert archive / Iowa / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 91, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 1, 2002, 10:27 PM CDT for Clarke County, Lucas County, Iowa. It was in force for 33 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
- Jun 1, 2002, 10:27 PM CDT (03:27 UTC)
- Expired
- Jun 1, 2002, 11:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Clarke County, IA, Lucas County, IA
The radar
The Des Moines radar (KDMX), 81 km from the middle of the area, began a volume at 03:30 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 |
|---|---|---|---|
| Jun 1, 10:42 PM CDT | Hail 1 | Derby, IA | |
| Jun 1, 10:55 PM CDT | Hail 1 | Derby, 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, 3.5 hours before the alert went out and 235 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.
- Mixed-layer CAPE
- 1494 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 2116 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
630 WUUS53 KDMX 020327 SVRDSM IAC039-117-020400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1027 PM CDT SAT JUN 1 2002 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN CLARKE COUNTY IN SOUTH CENTRAL IOWA WESTERN LUCAS COUNTY IN SOUTH CENTRAL IOWA * UNTIL 1100 PM CDT * AT 1025 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTHEAST OF WOODBURN...OR ABOUT 42 MILES SOUTH OF DES MOINES...MOVING EAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE... 6 MILES SOUTH OF LUCAS AROUND 1040 PM AND NEAR DERBY AROUND 1055 PM. HAIL UP TO THE SIZE OF QUARTERS IS LIKELY IN THE WARNED AREA. LARGE HAIL CAN CAUSE INJURY AND PROPERTY DAMAGE. SEEK SAFETY INDOORS UNTIL THE STORM PASSES. LAT...LON 4107 9373 4092 9373 4091 9338 4107 9342 JUNGBLUTH
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 10:51 PM CDT | Severe Thunderstorm Warning | DMX | Wayne | 39 min |
| Jun 2, 3:21 AM CDT | Severe Thunderstorm Warning | DMX | Polk | 39 min |
| Jun 2, 3:59 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Polk | 46 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2002Every 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.