Alert archive / Iowa / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 9, NWS Des Moines, IA

March 9, 2002Davis County, Wapello County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Mar 9, 2002, 12:20 AM CST for Davis County, Wapello County, Iowa. It was in force for 40 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, 12:20 AM CST (06:20 UTC)
Expired: Mar 9, 2002, 1:00 AM CST
In force: 40 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

Counties Davis County, IA, Wapello County, IA

The radar

The Des Moines radar (KDMX), 138 km from the middle of the area, began a volume at 06:20 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, 12:52 AM CST	Thunderstorm Wind 52 E	Ottumwa, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 8, 11:30 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 6.3 hours before the alert went out and 181 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: 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

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDMX 090620
SVRDSM
IAC051-179-090700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1218 AM CST SAT MAR 9 2002

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAVIS COUNTY IN SOUTHEAST IOWA
  WAPELLO COUNTY IN SOUTHEAST IOWA
  THIS INCLUDES THE CITY OF OTTUMWA

* UNTIL 100 AM CST

* AT 1215 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 25 MILES WEST OF OTTUMWA TO 23
  MILES WEST OF BLOOMFIELD...OR FROM 25 MILES WEST OF OTTUMWA TO 34
  MILES SOUTHWEST OF OTTUMWA...MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE...

  NEAR OTTUMWA AROUND 1245 AM AND
  NEAR ELDON AROUND 1255 AM.

OTHER WARNING LOCATIONS INCLUDE ELDON

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 4115 9263 4060 9264 4061 9220 4115 9219

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, 11:29 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, 12:13 AM CST	Severe Thunderstorm Warning	DMX	Mahaska, Poweshiek, Tama	47 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.