Alert archive / Iowa / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 8, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Mar 9, 2002, 12:13 AM CST for Mahaska County, Poweshiek County, Tama County, Iowa. It was in force for 47 min. 1 report 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 9, 2002, 12:13 AM CST (06:13 UTC)
- Expired
- Mar 9, 2002, 1:00 AM CST
- In force
- 47 min
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Mahaska County, IA, Poweshiek County, IA, Tama County, IA
The radar
The Des Moines radar (KDMX), 90 km from the middle of the area, began a volume at 06:15 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 9, 12:47 AM CST | Thunderstorm Wind 65 E | Cedar, 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
Davenport, (KDVN), launched 00:00Z, 6.2 hours before the alert went out and 178 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
- 184 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 1023 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS53 KDMX 090613
SVRDSM
IAC123-157-171-090700-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1213 AM CST SAT MAR 9 2002
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
POWESHIEK COUNTY IN CENTRAL IOWA
SOUTHERN TAMA COUNTY IN CENTRAL IOWA
MAHASKA COUNTY IN SOUTH CENTRAL IOWA
* UNTIL 100 AM CST
* AT 1210 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS FROM 18 MILES WEST OF GRINNELL TO 28
MILES SOUTHWEST OF OSKALOOSA...OR FROM 34 MILES NORTHEAST OF DES
MOINES TO 25 MILES WEST OF OTTUMWA...MOVING NORTHEAST AT 55 MPH.
* SEVERE THUNDERSTORMS WILL BE...
NEAR OSKALOOSA AROUND 1225 AM...
NEAR NEW SHARON AROUND 1230 AM...
NEAR MONTEZUMA AROUND 1235 AM...
NEAR TOLEDO AROUND 1240 AM AND
NEAR BROOKLYN AROUND 1245 AM.
OTHER WARNING LOCATIONS INCLUDE BROOKLYN...MONTEZUMA...NEW SHARON...
TAMA AND TOLEDO
DAMAGING WINDS OF 60 TO 70 MILES AN HOUR ARE LIKELY IN THE WARNED
AREA.
DAMAGING STRAIGHT-LINE WINDS OVER 75 MPH CAN SOUND JUST LIKE A
TORNADO AND CAUSE JUST AS MUCH DAMAGE.
LAT...LON 4205 9276 4169 9274 4117 9285 4118 9243
4205 9231
KULAThe 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, 11:29 PM CST | Severe Thunderstorm Warning | DMX | Warren | 46 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, 12:20 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, 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.