Alert archive / Iowa / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 25, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 18, 1997, 2:59 AM CDT for Adams County, Iowa. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 18, 1997, 2:59 AM CDT (07:59 UTC)
- Expired
- May 18, 1997, 3:30 AM CDT
- In force
- 31 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Adams County, IA
The radar
The Des Moines radar (KDMX), 113 km from the middle of the area, began a volume at 08:01 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 nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 8.0 hours before the alert went out and 144 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3053 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
547
WUUS1 KDSM 180758 RRA
SVRDSM
IAC003-180830-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
259 AM CDT SUN MAY 18 1997
* SEVERE THUNDERSTORM WARNING FOR
NORTHERN ADAMS COUNTY - SOUTH CENTRAL IOWA
* UNTIL 330 AM CDT
* SOME AREAS AFFECTED
MOUNT ETNA
NEVINVILLE
LAKE ICARIA
CARBON
* AT 255 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM 70 MILES
SOUTHWEST OF DES MOINES...JUST WEST OF MOUNT ETNA ON HIGHWAY N28
MOVING EAST AT 30 MPH.
* THE STORM WILL BE IN MOUNT ETNA AT 310 AM CDT.
THIS IS A DANGEROUS STORM. DO NOT GO OUTDOORS.
FAB/GFWhat 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
Local storm report, May 17, 10:10 PM CDT, 4 hours 49 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTION NATIONAL WEATHER SERVICE DES MOINES IA 1010 PM CDT FRI MAY 17 1997 TIME(CDT) .....CITY LOCATION..... ST ...EVENT/REMARKS... DATE(CDT) ....COUNTY LOCATION.... 0727 PM 1 E MURRAY IA 0.75 INCH HAIL 05/17/97 CLARKE PYTLAK CORRECTED TO REMOVE OLDER INFORMATION
Local storm report, May 17, 10:10 PM CDT, 4 hours 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1010 PM CDT FRI MAY 17 1997
TIME(CDT) .....CITY LOCATION..... ST ...EVENT/REMARKS...
DATE(CDT) ....COUNTY LOCATION....
0727 PM 1 E MURRAY IA 0.75 INCH HAIL
05/17/97 CLARKE
PYTLAK
05/17/97 MADISON
0650 PM 6 N AFTON IA 1.00 INCH HAIL
05/17/97 UNION
0707 PM 2 S LORIMAR IA 0.75 INCH HAIL
05/17/97 UNION
0722 PM MURRAY IA 0.75 INCH HAIL
05/17/97 CLARKE HAIL COVERED GROUND 2
INCHES DEEP
0733 PM 2 S OSCEOLA IA 1.75 INCH HAIL
05/17/97 CLARKE HAIL PARTIALLY STRIPPED
TREES
PYTLAKThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 3:13 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 27 min |
| May 18, 3:41 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 34 min |
| May 18, 4:36 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 19 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.