Alert archive / Iowa / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 76, NWS Des Moines, IA

June 24, 1997Dallas County, Guthrie County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 24, 1997, 9:39 PM CDT for Dallas County, Guthrie County, Iowa. It was in force for 46 min. 2 reports 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, 9:39 PM CDT (02:39 UTC)
Expired
Jun 24, 1997, 10:25 PM CDT
In force
46 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Dallas County, IA, Guthrie County, IA

The radar

The Des Moines radar (KDMX), 46 km from the middle of the area, began a volume at 02:35 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, 9:57 PM CDTHail 0.75Dawson, IA
Jun 24, 10:01 PM CDTHail 1Dawson, 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

Omaha, NE (KOAX), launched 00:00Z, 2.7 hours before the alert went out and 179 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, Omaha, NE at 00:00Z on 1997-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2805 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 00:00Z on 1997-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
2805 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1055 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

636 
WUUS1 KDSM 250240 RRA
SVRDSM
IAC049-077-250325-

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

* SEVERE THUNDERSTORM WARNING FOR
  NORTHWESTERN DALLAS COUNTY - CENTRAL IOWA
  NORTHEASTERN GUTHRIE COUNTY - WEST CENTRAL IOWA

* UNTIL 1025 PM CDT
 
* SOME AREAS AFFECTED
    DAWSON
    ALONG HIGHWAY 141
    JAMAICA
    BAGLEY

* AT 937 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM NEAR BAGLEY OR 40
  MILES NORTHWEST OF DES MOINES MOVING EAST AT 25 MPH.

* THE STORM WILL BE NEAR JAMAICA BY 950 PM AND DAWSON BY 1000 PM.

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


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, 7:32 PM CDT, 2 hours 7 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-250800-

CENTRAL IOWA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
732 PM CDT TUE JUN 24 1997

HAZARD -- ISOLATED SEVERE THUNDERSTORMS AND HEAVY RAINFALL.

AREA OF CONCERN -- ENTIRE OUTLOOK AREA.

TIMING DETAILS -- THROUGH MIDNIGHT FOR SEVERE WEATHER AND OVERNIGHT FOR
HEAVY RAIN.

METEOROLOGICAL COMMENTS -- A LINE OF STRONG THUNDERSTORMS EXTENDING FROM
NEAR MASON CITY TO NEAR DENISON IN WEST CENTRAL IOWA IS EXPECTED TO
INTENSIFY AS IT DRIFTS SLOWLY SOUTHEAST.  THE LATEST SOUNDING DATA HAS
CAPE/S OF NEARLY 4000 J/KG AND PRECIPITABLE WATER VALUES OF NEARLY TWO
INCHES.  GIVEN THE RECENT HEAVY RAINS AND PROBABLE TRAINING OF THE
STORMS...FLOODING AND FLASH FLOODING IS POSSIBLE THIS EVENING.  AS
LITTLE AS TWO INCHES OF RAIN IN THREE HOURS MAY LEAD TO FLOODING
ESPECIALLY OVER CRAWFORD...CARROLL AND AUDUBON COUNTIES IN WEST-CENTRAL
IOWA.  ELSEWHERE THE MAIN THREAT WILL BE FROM SEVERE THUNDERSTORMS.
WIND PROFILES SUGGEST THAT THE MAIN SEVERE WEATHER THREAT WILL BE FROM
DAMAGING WINDS AND LARGE HAIL.

PRECAUTIONS -- SPOTTER ACTIVATION WILL BE REQUIRED THIS EVENING.
EMERGENCY MANAGERS SHOULD REMAIN ALERT OF THE LATEST SHORT-TERM
FORECAST FOR THEIR AREA.  PEOPLE LIVING IN OR NEAR FLOOD PRONE AREAS
SHOULD REMAIN ALERT TO RAPID WATER RISES.  NEVER DRIVE INTO STANDING
WATER.

KUBINA
Special weather statement, Jun 24, 7:33 PM CDT, 2 hours 6 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-250800-

CENTRAL IOWA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
732 PM CDT TUE JUN 24 1997

HAZARD -- ISOLATED SEVERE THUNDERSTORMS AND HEAVY RAINFALL.

AREA OF CONCERN -- ENTIRE OUTLOOK AREA.

TIMING DETAILS -- THROUGH MIDNIGHT FOR SEVERE WEATHER AND OVERNIGHT FOR
HEAVY RAIN.

METEOROLOGICAL COMMENTS -- A LINE OF STRONG THUNDERSTORMS EXTENDING FROM
NEAR MASON CITY TO NEAR DENISON IN WEST CENTRAL IOWA IS EXPECTED TO
INTENSIFY AS IT DRIFTS SLOWLY SOUTHEAST.  THE LATEST SOUNDING DATA HAS
CAPE/S OF NEARLY 4000 J/KG AND PRECIPITABLE WATER VALUES OF NEARLY TWO
INCHES.  GIVEN THE RECENT HEAVY RAINS AND PROBABLE TRAINING OF THE
STORMS...FLOODING AND FLASH FLOODING IS POSSIBLE THIS EVENING.  AS
LITTLE AS TWO INCHES OF RAIN IN THREE HOURS MAY LEAD TO FLOODING
ESPECIALLY OVER CRAWFORD...CARROLL AND AUDUBON COUNTIES IN WEST-CENTRAL
IOWA.  ELSEWHERE THE MAIN THREAT WILL BE FROM SEVERE THUNDERSTORMS.
WIND PROFILES SUGGEST THAT THE MAIN SEVERE WEATHER THREAT WILL BE FROM
DAMAGING WINDS AND LARGE HAIL.

PRECAUTIONS -- SPOTTER ACTIVATION WILL BE REQUIRED THIS EVENING.
EMERGENCY MANAGERS SHOULD REMAIN ALERT OF THE LATEST SHORT-TERM
FORECAST FOR THEIR AREA.  PEOPLE LIVING IN OR NEAR FLOOD PRONE AREAS
SHOULD REMAIN ALERT TO RAPID WATER RISES.  NEVER DRIVE INTO STANDING
WATER.

KUBINA
Special weather statement, Jun 24, 8:26 PM CDT, 1 hour 13 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 12 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, 32 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, 31 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

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, 10:18 PM CDTSevere Thunderstorm WarningDMXBremer32 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.