Alert archive / Iowa / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 77, NWS Des Moines, IA

June 24, 1997Bremer County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 24, 1997, 10:18 PM CDT for Bremer County, Iowa. It was in force for 32 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 24, 1997, 10:18 PM CDT (03:18 UTC)
Expired
Jun 24, 1997, 10:50 PM CDT
In force
32 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Bremer County, IA

The radar

The La Crosse radar (KARX), 148 km from the middle of the area, began a volume at 03:21 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

TimeReportWhereRemark
Jun 24, 10:22 PM CDTHail 1Waverly, 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.

IssuedProductOfficeLasted
Jun 24, 6:15 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.3 hours before the alert went out and 197 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 1997-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1986 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 1997-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1986 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1290 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

879 
WUUS1 KDSM 250319 RRA
SVRDSM
IAC017-250350-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1018 PM CDT TUE JUN 24 1997

* SEVERE THUNDERSTORM WARNING FOR
  BREMER COUNTY - NORTHEASTERN IOWA

* UNTIL 1050 PM CDT
 
* SOME AREAS AFFECTED
    WAVERLY
    TRIPOLI
    DENVER
    HIGHWAY 3

* AT 1018 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM NEAR WAVERLY OR
  20 MILES NORTH OF WATERLOO MOVING EAST AT 25 MPH.

* THE STORM WILL BE NEAR DENVER BY 1035 PM AND READLYN BY 1045 PM.

HAIL TO ONE INCH IS LIKELY WITH THIS DANGEROUS STORM.  DO NOT GO
OUTDOORS TO VIEW THE STORM.


KULA

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.

In the hours before

Special weather statement, Jun 24, 8:26 PM CDT, 1 hour 52 minutes before
IAZ004>006-015-023-250300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
826 PM CDT TUE JUN 24 1997

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES IN NORTHWEST IOWA...EMMET...KOSSUTH...WINNEBAGO...PALO ALTO AND
POCAHONTAS.

SEVERE THUNDERSTORM WATCH 518 REMAINS IN EFFECT UNTIL MIDNIGHT FOR THE
REMAINDER OF THE DES MOINES AREA OF RESPONSIBILITY.

KUBINA
Special weather statement, Jun 24, 8:27 PM CDT, 1 hour 51 minutes before
IAZ004>006-015-023-250300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
826 PM CDT TUE JUN 24 1997

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES IN NORTHWEST IOWA...EMMET...KOSSUTH...WINNEBAGO...PALO ALTO AND
POCAHONTAS.

SEVERE THUNDERSTORM WATCH 518 REMAINS IN EFFECT UNTIL MIDNIGHT FOR THE
REMAINDER OF THE DES MOINES AREA OF RESPONSIBILITY.

KUBINA
Local storm report, Jun 24, 9:07 PM CDT, 1 hour 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
907 PM CDT TUE JUN 24 1997

TIME(CDT)   .....CITY LOCATION.....  ST   ...EVENT/REMARKS...
DATE(CDT)   ....COUNTY LOCATION....

0600 PM    3 E ARCADIA               IA   1.75 INCH HAIL
06/24/97   SAC

0832 PM    2 S CARROLL               IA   0.75 INCH HAIL
06/24/97   CARROLL

BOYD
Local storm report, Jun 24, 9:08 PM CDT, 1 hour 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
907 PM CDT TUE JUN 24 1997

TIME(CDT)   .....CITY LOCATION.....  ST   ...EVENT/REMARKS...
DATE(CDT)   ....COUNTY LOCATION....

0600 PM    3 E ARCADIA               IA   1.75 INCH HAIL
06/24/97   SAC

0832 PM    2 S CARROLL               IA   0.75 INCH HAIL
06/24/97   CARROLL

BOYD
Special weather statement, Jun 24, 9:56 PM CDT, 22 minutes before
IAZ007>006-016-017-024-025-033>035-044-045-250400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
956 PM CDT TUE JUN 24 1997

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES...SAC...CALHOUN...WEBSTER...HUMBOLDT...WRIGHT...HANCOCK...CERRO
GORDO...WORTH...CRAWFORD AND CARROLL.

SEVERE THUNDERSTORM WATCH 518 REMAINS IN EFFECT UNTIL MIDNIGHT TO THE
SOUTHEAST OF A LINE FROM AUDUBON TO CHARLES CITY.

KUBINA
Special weather statement, Jun 24, 9:57 PM CDT, 21 minutes before
IAZ007>006-016-017-024-025-033>035-044-045-250400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
956 PM CDT TUE JUN 24 1997

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES...SAC...CALHOUN...WEBSTER...HUMBOLDT...WRIGHT...HANCOCK...CERRO
GORDO...WORTH...CRAWFORD AND CARROLL.

SEVERE THUNDERSTORM WATCH 518 REMAINS IN EFFECT UNTIL MIDNIGHT TO THE
SOUTHEAST OF A LINE FROM AUDUBON TO CHARLES CITY.

KpUBINA

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 8:30 PM CDTSevere Thunderstorm WarningDMXCarroll30 min
Jun 24, 9:22 PM CDTSevere Thunderstorm WarningDMXHamilton48 min
Jun 24, 9:39 PM CDTSevere Thunderstorm WarningDMXDallas, Guthrie46 min
Jun 24, 10:27 PM CDTSevere Thunderstorm WarningDMXMarshall, Story33 min
Jun 24, 10:42 PM CDTSevere Thunderstorm WarningDMXMadison48 min
Jun 24, 10:50 PM CDTSevere Thunderstorm WarningDMXDallas40 min
Jun 24, 11:07 PM CDTSevere Thunderstorm WarningDMXBlack Hawk33 min
Jun 24, 11:11 PM CDTSevere Thunderstorm WarningDMXAdams, Union34 min
Jun 24, 11:43 PM CDTSevere Thunderstorm WarningDMXClarke47 min
Jun 24, 11:51 PM CDTSevere Thunderstorm WarningDMXLucas34 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1997Every severe thunderstorm warning in 1997

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.