Alert archive / Iowa / Tornado Warnings in 2005

Tornado Warning 23, NWS Des Moines, IA

July 24, 2005Webster County, Iowa

NWS Des Moines, IA issued this tornado warning at Jul 24, 2005, 5:42 PM CDT for Webster County, Iowa. It was in force for 27 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: Jul 24, 2005, 5:42 PM CDT (22:42 UTC)
Expired: Jul 24, 2005, 6:09 PM CDT
In force: 27 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Webster County, IA

The radar

The Des Moines radar (KDMX), 80 km from the middle of the area, began a volume at 22:42 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 24, 4:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.7 hours before the alert went out and 211 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: 699 J/kg
Mixed-layer CIN: -380 J/kg
Mixed-layer LCL: 1888 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 242243
TORDMX
IAC187-242330-
/O.NEW.KDMX.TO.W.0023.050724T2242Z-050724T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
542 PM CDT SUN JUL 24 2005

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN WEBSTER COUNTY IN CENTRAL IOWA.

* UNTIL 630 PM CDT.

* AT 537 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR GOWRIE...OR 16 MILES SOUTHWEST OF FORT
  DODGE...AND MOVING EAST AT 10 MPH.

* THIS STORM WILL BE...
  5 MILES NORTH OF HARCOURT BY 610 PM CDT.
  6 MILES SOUTH OF OTHO BY 620 PM CDT.
  NEAR LEHIGH BY 630 PM CDT.

THE LOCATIONS OF CALLENDER AND DAYTON ARE ALSO IN THE PATH. FUNNEL 
CLOUDS HAVE BEEN SPOTTED WITH THIS STORM 1 MILE NORTH OF GOWRIE.

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.

LAT...LON 4241 9440 4222 9440 4222 9396 4246 9396

$$

DONAVON

1 follow-up statement

000 
WWUS53 KDMX 242309
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
610 PM CDT SUN JUL 24 2005

IAC187-242320-
/O.CAN.KDMX.TO.W.0023.000000T0000Z-050724T2330Z/
WEBSTER IA-
610 PM CDT SUN JUL 24 2005

...THE TORNADO WARNING FOR SOUTHERN WEBSTER COUNTY HAS BEEN
CANCELLED...

AT 607 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE EITHER WEAKENED OR
MOVED OUT OF THE AREA...AND NO LONGER POSE AN IMMEDIATE THREAT TO
LIFE OR PROPERTY. THEREFORE...THE TORNADO WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
SUNDAY EVENING FOR NORTHWESTERN IOWA.

LAT...LON 4241 9440 4222 9440 4222 9396 4246 9396

$$

VACHALEK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 5:48 PM CDT	Severe Thunderstorm Warning	DMX	Sac	45 min
Jul 24, 6:17 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	44 min
Jul 24, 6:30 PM CDT	Tornado Warning	DMX	Crawford	45 min
Jul 24, 6:50 PM CDT	Severe Thunderstorm Warning	DMX	Franklin, Hardin	41 min

Nearby

Tornado Warnings in Iowa, 2005 Every tornado warning in 2005 Tornadoes in 2005

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.