Alert archive / Iowa / Tornado Warnings in 2003

Tornado Warning 18, NWS Des Moines, IA

May 10, 2003Bremer County, Iowa

NWS Des Moines, IA issued this tornado warning at May 10, 2003, 6:54 PM CDT for Bremer County, Iowa. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 10, 2003, 6:54 PM CDT (23:54 UTC)
Expired: May 10, 2003, 7:30 PM CDT
In force: 36 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Bremer County, IA

The radar

The La Crosse radar (KARX), 146 km from the middle of the area, began a volume at 23:56 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, 11.9 hours before the alert went out and 189 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1102 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

369 
WFUS53 KDMX 102354
TORDMX
IAC017-110030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
654 PM CDT SAT MAY 10 2003

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN BREMER COUNTY IN NORTHEAST IOWA

* UNTIL 730 PM CDT

* AT 648 PM...RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO 4 MILES SOUTHEAST OF READLYN...OR ABOUT 14 MILES NORTHEAST
  OF WATERLOO...MOVING NORTHEAST AT 55 MPH.

* THE STORM WILL BE...

  8 MILES SOUTHEAST OF TRIPOLI AROUND 655 PM AND
  NEAR SUMNER AROUND 700 PM.

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY
ISSUED FOR THE WARNED AREA.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM SATURDAY EVENING FOR
EASTERN IOWA.

LAT...LON 4264 9234 4264 9217 4265 9208 4293 9209
          4291 9222 4278 9228

FORSTER

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 3:54 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo	36 min
May 10, 4:25 PM CDT	Severe Thunderstorm Warning	DMX	Wayne	50 min
May 10, 4:42 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	48 min
May 10, 4:46 PM CDT	Tornado Warning	DMX	Appanoose, Wayne	44 min
May 10, 4:48 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	27 min
May 10, 5:11 PM CDT	Severe Thunderstorm Warning	DMX	Marion, Wapello	34 min
May 10, 5:17 PM CDT	Tornado Warning	DMX	Marion	28 min
May 10, 5:29 PM CDT	Tornado Warning	DMX	Appanoose, Davis	46 min
May 10, 5:31 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Poweshiek	29 min
May 10, 5:43 PM CDT	Tornado Warning	DMX	Mahaska	32 min
May 10, 5:49 PM CDT	Tornado Warning	DMX	Poweshiek	26 min
May 10, 5:57 PM CDT	Severe Thunderstorm Warning	DMX	Tama	33 min
May 10, 5:58 PM CDT	Tornado Warning	DMX	Davis	47 min
May 10, 6:07 PM CDT	Tornado Warning	DMX	Wapello	38 min
May 10, 6:12 PM CDT	Tornado Warning	DMX	Appanoose, Davis	33 min
May 10, 6:14 PM CDT	Tornado Warning	DMX	Poweshiek	31 min
May 10, 6:22 PM CDT	Tornado Warning	DMX	Tama	23 min
May 10, 6:33 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	27 min
May 10, 6:44 PM CDT	Tornado Warning	DMX	Davis	46 min
May 10, 6:52 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	23 min

Nearby

Tornado Warnings in Iowa, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.