Alert archive / Iowa / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 110, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 24, 1997, 11:22 PM CDT for Ringgold County, Iowa. It was in force for 18 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
- Aug 24, 1997, 11:22 PM CDT (04:22 UTC)
- Expired
- Aug 24, 1997, 11:40 PM CDT
- In force
- 18 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Ringgold County, IA
The radar
The Des Moines radar (KDMX), 119 km from the middle of the area, began a volume at 04:21 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 24, 11:25 PM CDT | Thunderstorm Wind 52 | Mt Ayr, IA | |
| Aug 24, 11:37 PM CDT | Hail 0.75 | Mt Ayr, 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 nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 4.4 hours before the alert went out and 190 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.
- Mixed-layer CAPE
- 4736 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1163 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 250422 RRA
SVRDSM
IAC159-250440-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1122 PM CDT SUN AUG 24 1997
* SEVERE THUNDERSTORM WARNING FOR
SOUTHERN RINGGOLD COUNTY - SOUTH CENTRAL IOWA
* UNTIL 1140 PM CDT
* SOME AREAS AFFECTED
RURAL AREAS
* AT 1120 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTH OF
KELLERTON OR 65 MILES SOUTHWEST OF DES MOINES MOVING SOUTH AT 20 MPH.
* THE STORM WILL BE OUT OF RINGGOLD COUNTY BY 1135 PM CDT.
THIS IS A DANGEROUS STORM. DO NOT GO OUTDOORS.
FORSTER/SMITHWhat 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, Aug 24, 7:00 PM CDT, 4 hours 22 minutes before
IAZ061-062-074-075-085-086-096-097-250100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 700 PM CDT SUN AUG 24 1997 ...SEVERE THUNDERSTORM WATCH CANCELLED... THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR PARTS OF CENTRAL AND SOUTHEAST IOWA HAS BEEN CANCELLED. THE WATCH IS NO LONGER IN EFFECT FOR THE COUNTIES OF NEWTON...POWESHIEK...MARION...MAHASKA... MONROE...WAPELLO...APPANOOSE AND DAVIS. REPEATING...THE SEVERE THUNDERSTORM WATCH (715) HAS BEEN CANCELLED FOR A PORTION OF CENTRAL AND SOUTHEAST IOWA. SMITH
Special weather statement, Aug 24, 7:05 PM CDT, 4 hours 17 minutes before
IAZ061-062-074-075-085-086-096-097-250100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 700 PM CDT SUN AUG 24 1997 ...SEVERE THUNDERSTORM WATCH CANCELLED... THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR PARTS OF CENTRAL AND SOUTHEAST IOWA HAS BEEN CANCELLED. THE WATCH IS NO LONGER IN EFFECT FOR THE COUNTIES OF NEWTON...POWESHIEK...MARION...MAHASKA... MONROE...WAPELLO...APPANOOSE AND DAVIS. REPEATING...THE SEVERE THUNDERSTORM WATCH (#715) HAS BEEN CANCELLED FOR A PORTION OF CENTRAL AND SOUTHEAST IOWA. SMITH
Special weather statement, Aug 24, 11:10 PM CDT, 12 minutes before
IAZ033>039-044>050-057>062-070>075-081>086-092>097-250815- CENTRAL IOWA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 1110 PM CDT SUN AUG 24 1997 HAZARD--ISOLATED SEVERE THUNDERSTORMS CAPABLE OF PRODUCING HAIL TO ONE INCH IN DIAMETER...WIND GUSTS TO 65 MPH AND VERY HEAVY RAINFALL. AREA OF CONCERN--SOUTHERN IOWA...ALONG AND SOUTHWEST OF A CORYDON TO AUDUBON LINE. METEOROLOGICAL COMMENTS--A FRONTAL BOUNDARY ACROSS SOUTHERN IOWA WILL BE THE FOCUS FOR THUNDERSTORM DEVELOPMENT INTO THE EARLY MORNING HOURS OVER THE SOUTHWEST THIRD OF THE STATE. HIGH PRECIPITABLE WATER VALUES ALONG THE FRONTAL BOUNDARY THIS EVENING INDICATE THE POTENTIAL FOR RAINFALL OF ONE TO TWO INCHES AN HOUR ACROSS THE AREA OF CONCERN. IN ADDITION...CAPE VALUES OF AROUND 5500 JOULES PER KILOGRAM INDICATE THE POTENTIAL FOR STRONG STRAIGHT LINE WINDS AND HAIL TO ONE INCH IN DIAMETER. THE STORMS SHOULD BEGIN TO SHIFT SLOWLY INTO EXTREME SOUTHERN IOWA AND NORTHERN MISSOURI SHORTLY AFTER MIDNIGHT WITH THE POTENTIAL FOR ADDITIONAL DEVELOPMENT LATE TONIGHT AS LOW LEVEL WINDS BECOME SOUTHERLY ACROSS SOUTHWEST IOWA. PRECAUTIONS--SPOTTER ACTIVATION IS NOT EXPECTED DURING THE EARLY MORNING HOURS. KEEP ABREAST OF LATER SHORT TERM FORECASTS AND CENTRAL IOWA THUNDERSTORM OUTLOOKS. SMITH
Local storm report, Aug 24, 11:15 PM CDT, 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1115 PM CDT SUN AUG 24 1997
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1033 PM 3 NW DECATUR CITY IA 60 MPH WINDS
08/24/97 DECATUR
1103 PM KELLERTON IA 65 MPH WINDS
08/24/97 RINGOLD WITH TREES DOWNED
SMITHLocal storm report, Aug 24, 11:15 PM CDT, 7 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE DES MOINES IA
1115 PM CDT SUN AUG 24 1997
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1033 PM 3 NW DECATUR CITY IA 60 MPH TSTM GUST
08/24/97 DECATUR
1103 PM KELLERTON IA 65 MPH TSTM GUST
08/24/97 RINGOLD WITH TREES DOWNED
SMITHLocal storm report, Aug 24, 11:18 PM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1115 PM CDT SUN AUG 24 1997
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1033 PM 3 NW DECATUR CITY IA 60 MPH WINDS
08/24/97 DECATUR
1103 PM KELLERTON IA 65 MPH WINDS
08/24/97 RINGOLD WITH TREES DOWNED
SMITHThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 10:05 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 35 min |
| Aug 24, 10:38 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 32 min |
| Aug 24, 10:46 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 34 min |
| Aug 24, 11:47 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 18 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.