Alert archive / Iowa / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 38, NWS Des Moines, IA

June 15, 1997Franklin County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 15, 1997, 9:27 PM CDT for Franklin County, Iowa. It was in force for 33 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
Jun 15, 1997, 9:27 PM CDT (02:27 UTC)
Expired
Jun 15, 1997, 10:00 PM CDT
In force
33 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Franklin County, IA

The radar

The Des Moines radar (KDMX), 118 km from the middle of the area, began a volume at 02:26 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

Minneapolis, MN (KMPX), launched 00:00Z, 2.5 hours before the alert went out and 237 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, Minneapolis, MN at 00:00Z on 1997-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 707 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, Minneapolis, MN at 00:00Z on 1997-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -38 square meters per square second.19395878Sfc1 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
707 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1460 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-38 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-1.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDSM 160226 RRA
SVRDSM
IAC069-160300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
927 PM CDT SUN JUN 15 1997

* SEVERE THUNDERSTORM WARNING FOR
  WESTERN FRANKLIN COUNTY - NORTH CENTRAL IOWA

* UNTIL 1000 PM CDT
 
* SOME AREAS AFFECTED
    ALEXANDER
    LATIMER

* AT 926 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES EAST OF
  BELMOND OR 30 MILES SOUTHWEST OF MASON CITY MOVING SOUTHEAST AT 30
  MPH.

* THE STORM WILL BE NEAR ALEXANDER AT 935 PM CDT.

THIS IS A DANGEROUS STORM.  DO NOT GO OUTDOORS.




SCHAFER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 15, 8:59 PM CDTTornado WarningDMXHancock, Wright31 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.