Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 97, NWS Des Moines, IA

July 31, 1995Grundy County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 31, 1995, 3:52 PM CDT for Grundy County, Iowa. It was in force for 53 min.

The area

The counties it named.

The facts

Issued
Jul 31, 1995, 3:52 PM CDT (20:52 UTC)
Expired
Jul 31, 1995, 4:45 PM CDT
In force
53 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Grundy County, IA

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.9 hours before the alert went out and 208 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 12:00Z on 1995-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1663 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, Davenport, at 12:00Z on 1995-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 square meters per square second.1939Sfc1 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
1663 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
991 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
15 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.

000 
TTAA00 KMLI 312057
SVRDSM
IAC075-312145-

BULLETIN-EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
ISSUED BY QUAD CITIES IA IL
352 PM CDT MON JUL 31 1995

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 445 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL IOWA

   ...GRUNDY COUNTY

AT 347 PM CDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8 MILES
NORTHWEST OF GRUNDY CENTER MO*VING NORTHEAST AT 35 MPH.  THIS STORM
WILL PASS 5 MILES SOUTH OF PARKERSBURG BY 405 PM.  THIS STORM WILL
PRODUCE LARGE HAIL AND DAMAGING WINDS.
.
THIS IS A DANGEROUS STORM.  STAY INSIDE AWAY FROM WINDOWS.

ZOGG

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, Jul 31, 2:32 PM CDT, 1 hour 20 minutes before
IAZ047-312010-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
233 PM CDT MON JUL 31 1995

...SEVERE THUNDERSTORM WARNING FOR BOONE COUNTY HAS EXPIRED...

THE STORM OVER BOONE COUNTY WAS NO LONGER SEVERE.  WIND GUSTS OVER
EASTERN BOONE COUNTY JUST NORTHWEST OF LUTHER HAD FALLEN TO 35 MILES AN
HOUR.

 BELLES
Special weather statement, Jul 31, 2:33 PM CDT, 1 hour 19 minutes before
IAZ047-312010-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
233 PM CDT MON JUL 31 1995

...SEVERE THUNDERSTORM WARNING FOR BOONE COUNTY HAS EXPIRED...

THE STORM OVER BOONE COUNTY WAS NO LONGER SEVERE.  WIND GUSTS OVER
EASTERN BOONE COUNTY JUST NORTHWEST OF LUTHER HAD FALLEN TO 35 MILES AN
HOUR.

 BELLES

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 1:01 PM CDTSevere Thunderstorm WarningDMXGreene34 min
Jul 31, 1:55 PM CDTSevere Thunderstorm WarningDMXBoone20 min
Jul 31, 2:10 PM CDTSevere Thunderstorm WarningDMXBoone30 min
Jul 31, 4:10 PM CDTSevere Thunderstorm WarningDMXUnion50 min
Jul 31, 4:11 PM CDTSevere Thunderstorm WarningDMXUnion19 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1995Every severe thunderstorm warning in 1995

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.