Alert archive / Iowa / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 198, NWS Des Moines, IA

June 29, 2005Cerro Gordo County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 29, 2005, 9:27 PM CDT for Cerro Gordo County, Iowa. It was in force for 28 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: Jun 29, 2005, 9:27 PM CDT (02:27 UTC)
Expired: Jun 29, 2005, 9:55 PM CDT
In force: 28 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Cerro Gordo County, IA

The radar

The Des Moines radar (KDMX), 146 km from the middle of the area, began a volume at 02:29 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 29, 9:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.5 hours before the alert went out and 210 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: 2111 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 970 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 283 m²/s²
0-3 km storm-relative helicity: 415 m²/s²
Significant tornado parameter: 3.1
Supercell composite: 18.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDMX 300227
SVRDMX
IAC033-300315-
/O.NEW.KDMX.SV.W.0198.050630T0227Z-050630T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
927 PM CDT WED JUN 29 2005

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CERRO GORDO COUNTY IN NORTH CENTRAL IOWA.

* UNTIL 1015 PM CDT.

* AT 925 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR SHEFFIELD...OR 18
  MILES SOUTH OF MASON CITY...AND MOVING NORTHEAST AT 60 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  EASTERN CERRO GORDO COUNTY...INCLUDING THE LOCATION OF ROCKWELL.

GO TO A BASEMENT OR SMALL INTERIOR ROOM. EXTENSIVE DAMAGE IS LIKELY.
EVACUATE MOBILE HOMES...AND SEEK SHELTER IN A STURDY BUILDING. SEVERE
STRAIGHT LINE WINDS CAN SOUND LIKE A TORNADO...AND PRODUCE SIMILAR
DAMAGE.

LAT...LON 4292 9336 4291 9318 4292 9304 4326 9304

$$

COGIL

1 follow-up statement

000 
WWUS53 KDMX 300255
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
955 PM CDT WED JUN 29 2005

IAC033-300305-
/O.CAN.KDMX.SV.W.0198.000000T0000Z-050630T0315Z/
CERRO GORDO IA-
955 PM CDT WED JUN 29 2005

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CERRO GORDO COUNTY HAS
BEEN CANCELLED...

AT 950 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 SEVERE THUNDERSTORM WARNING HAS
BEEN CANCELLED.

IF SEVERE WEATHER WAS OBSERVED...CONTACT THE NATIONAL WEATHER SERVICE
OFFICE IN DES MOINES AT 1-800-759-9276.

LAT...LON 4292 9336 4291 9318 4292 9304 4326 9304

$$

COGIL

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 29, 3:35 PM CDT, 5 hours 52 minutes earlier.

Area forecast discussion, Jun 29, 3:35 PM CDT, 5 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
335 PM CDT WED JUN 29 2005

.DISCUSSION...
MOST OF WX ACTION OVR FOR THE FCST PD WL BE IN THE FIRST PD WITH
VIGOROUS SYS MOVG THRU TNGT.  XPCT TSRA INIT SHORTLY AFTER ZN
RELEASE OVR NWRN IA WITH A SIG EVENT TAKING PLACE TNGT AS STG JET
AND STEEP LAPSE RATES ARE IN PLACE OVR THE CWA.  MAIN THREAT WL BE N
OF U.S. HWY 30 WITH TIMING BEING FRM LATE THIS AFTN THRU MIDN.
COOLER AND DRIER WX ON TAP POST FROPA WITH BUBBLE HIGH MOVG THRU
CNTRL U.S. THU THROUGH SAT.  NXT ROUND WL COME IN THE SAT NGT THRU
SUN NGT WITH THTE 4TH LOOKING TO BE ALRIGHT ATTM.  STILL RECOVERING
FM LIGHTNING STRIKE EARLIER TDA SO ANAL LMTD TO 1ST PD FOR THE MOST
PART.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

Hazardous weather outlook, Jun 29, 5:55 PM CDT, 3 hours 32 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
555 PM CDT WED JUN 29 2005

IAZ004>007-015>017-023>028-033>039-044>050-301030-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-
BOONE-STORY-MARSHALL-TAMA-
555 PM CDT WED JUN 29 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
AND CENTRAL IOWA NORTH OF HIGHWAY 30.

.DAY ONE...TONIGHT

THUNDERSTORMS WILL OVERSPREAD THE REMAINDER OF THE AREA THIS
EVENING. SEVERE STORMS ARE LIKELY WITH THIS ACTIVITY. SUPERCELLS
WITH GOLFBALL SIZED HAIL...70 MPH WINDS AND AN ISOLATED TORNADO WILL
BE POSSIBLE INITIALLY WEST OF INTERSTATE 35. THESE STORMS MAY EVOLVE
INTO A DAMAGING WIND EVENT AS IT PROGRESSES TO THE EAST WITH THE
MAIN THREAT BECOMING STRAIGHT LINE WINDS UP TO 75 MPH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORMS WILL BE POSSIBLE ACROSS THE AREA SATURDAY NIGHT
THROUGH SUNDAY NIGHT. A FEW SEVERE STORMS AND LOCALLY HEAVY
RAINFALL WILL BE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY THIS EVENING THROUGH 11 PM. ACTIVATION
MAY ALSO BE POSSIBLE SATURDAY NIGHT THROUGH SUNDAY NIGHT.

IAZ057>062-070>075-081>086-092>097-301030-
AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-
WARREN-MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-
TAYLOR-RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS-
555 PM CDT WED JUN 29 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
AND CENTRAL IOWA MAINLY SOUTH OF HIGHWAY 30.

.DAY ONE...TONIGHT

THUNDERSTORMS WILL OVERSPREAD THE REMAINDER OF THE AREA THIS
EVENING. SEVERE STORMS ARE POSSIBLE WITH QUARTER SIZED HAIL AND WIND
GUSTS TO 65 MPH BEING THE MAIN THREATS. AN ISOLATED TORNADO WILL BE
POSSIBLE EARLY THIS EVENING WEST OF INTERSTATE 35. DAMAGING WINDS
WILL BECOME THE PRIMARY THREAT AFTER 9 PM AS THE STORMS PROGRESS TO
THE EAST.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORMS WILL BE POSSIBLE ACROSS THE AREA SUNDAY AND SUNDAY
NIGHT. A FEW SEVERE STORMS AND LOCALLY HEAVY RAINFALL WILL BE
POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY TONIGHT THROUGH 1 AM. ADDITIONAL
SPOTTER ACTIVATION MAY BE NEEDED ON SUNDAY.

DONAVON/KINNEY/FAB

In the hours before

Local storm report, Jun 29, 8:53 PM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
853 PM CDT WED JUN 29 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0832 PM     TSTM WND DMG     9 NW OGDEN              42.13N 94.15W
06/29/2005                   BOONE              IA   LAW ENFORCEMENT

            TREES DOWN ON HIGHWAY 169. REMOVED BY BUS LOAD OF PEOPLE.

0834 PM     TSTM WND DMG     FORT DODGE              42.51N 94.18W
06/29/2005                   WEBSTER            IA   BROADCAST MEDIA

            100 YEAR OLD TREES DOWN ON 15TH AVE NORTH...NORTH OF 3RD
            AVENUE. FROM KCCI.

0834 PM     TSTM WND GST     OTHO                    42.42N 94.15W
06/29/2005  70 MPH           WEBSTER            IA   BROADCAST MEDIA

            JUST SOUTH OF OTHO. FROM KCCI.

0851 PM     TSTM WND GST     JEWELL                  42.31N 93.64W
06/29/2005  68 MPH           HAMILTON           IA   MESONET

            KCCI SCHOOLNET.

&&

SMALL

Local storm report, Jun 29, 8:55 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
855 PM CDT WED JUN 29 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0849 PM     TSTM WND GST     WEBSTER CITY MUNICIPAL  42.44N 93.87W
06/29/2005  70 MPH           HAMILTON           IA   AWOS

&&

SMALL

Local storm report, Jun 29, 8:59 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
859 PM CDT WED JUN 29 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0810 PM     TSTM WND DMG     FARNHAMVILLE            42.28N 94.42W
06/29/2005                   CALHOUN            IA   BROADCAST MEDIA

            TREES AND LIMBS ACROSS UNKNOWN HIGHWAY. FROM KICD RADIO
            SPENCER.

&&

SMALL

Local storm report, Jun 29, 9:03 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
903 PM CDT WED JUN 29 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0849 PM     TSTM WND GST     ANITA                   41.44N 94.77W
06/29/2005  60 MPH           CASS               IA   MESONET

            FROM KCCI SCHOOLNET.

&&

SMALL

Local storm report, Jun 29, 9:07 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
907 PM CDT WED JUN 29 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 PM     TSTM WND GST     2 N BUCKEYE             42.45N 93.38W
06/29/2005  75 MPH           HARDIN             IA   STORM CHASER

0905 PM     TSTM WND DMG     4 SW PANORA             41.65N 94.42W
06/29/2005                   GUTHRIE            IA   LAW ENFORCEMENT

            HIGHWAY 25 AND MONTEITH RD.

&&

SMALL

Local storm report, Jun 29, 9:26 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
926 PM CDT WED JUN 29 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0902 PM     TSTM WND DMG     7 NW JEFFERSON          42.09N 94.47W
06/29/2005                   GREENE             IA   BROADCAST MEDIA

            TREES DOWN. FROM KCCI.

0812 PM     TSTM WND DMG     1 W PATON               42.16N 94.27W
06/29/2005                   GREENE             IA   BROADCAST MEDIA

            COUNTY ROAD E18 WEST OF PATON...STEEL BUILDING
            DEMOLISHED. FROM KCCI.

&&

SMALL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 7:20 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	42 min
Jun 29, 7:22 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford	38 min
Jun 29, 7:46 PM CDT	Severe Thunderstorm Warning	DMX	Greene	45 min
Jun 29, 7:53 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	52 min
Jun 29, 7:53 PM CDT	Tornado Warning	DMX	Emmet	37 min
Jun 29, 8:05 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	29 min
Jun 29, 8:10 PM CDT	Severe Thunderstorm Warning	DMX	Webster	70 min
Jun 29, 8:15 PM CDT	Severe Thunderstorm Warning	DMX	Boone	46 min
Jun 29, 8:24 PM CDT	Severe Thunderstorm Warning	DMX	Cass	51 min
Jun 29, 8:29 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton	54 min
Jun 29, 8:36 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	39 min
Jun 29, 8:41 PM CDT	Severe Thunderstorm Warning	DMX	Adair	34 min
Jun 29, 8:45 PM CDT	Severe Thunderstorm Warning	DMX	Story	27 min
Jun 29, 8:50 PM CDT	Severe Thunderstorm Warning	DMX	Wright	31 min
Jun 29, 8:52 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	58 min
Jun 29, 8:54 PM CDT	Severe Thunderstorm Warning	DMX	Franklin	64 min
Jun 29, 9:06 PM CDT	Severe Thunderstorm Warning	DMX	Dallas	42 min
Jun 29, 9:19 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Grundy	59 min
Jun 29, 9:33 PM CDT	Severe Thunderstorm Warning	DMX	Cass	42 min
Jun 29, 9:49 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	60 min
Jun 29, 10:00 PM CDT	Severe Thunderstorm Warning	DMX	Union	31 min
Jun 29, 10:11 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	49 min
Jun 29, 10:22 PM CDT	Severe Thunderstorm Warning	DMX	Marshall	41 min
Jun 29, 10:41 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	49 min
Jun 29, 11:04 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Union	63 min
Jun 29, 11:14 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Taylor	67 min
Jun 29, 11:41 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Warren	52 min
Jun 29, 11:55 PM CDT	Severe Thunderstorm Warning	DMX	Marion	53 min
Jun 30, 12:05 AM CDT	Severe Thunderstorm Warning	DMX	Monroe	42 min
Jun 30, 12:18 AM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold	59 min
Jun 30, 12:22 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska	54 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2005 Every severe thunderstorm warning 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.