Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 95, NWS Des Moines, IA

July 31, 1995Boone County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 31, 1995, 1:55 PM CDT for Boone County, Iowa. It was in force for 20 min.

The area

The counties it named.

The facts

Issued
Jul 31, 1995, 1:55 PM CDT (18:55 UTC)
Expired
Jul 31, 1995, 2:15 PM CDT
In force
20 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Boone County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 6.9 hours before the alert went out and 218 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 12:00Z on 1995-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 905 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 12:00Z on 1995-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 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
905 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1421 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDSM 311854 RRA
SVRDSM
IAC015-311915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
155 PM CDT MON JUL 31 1995

* SEVERE THUNDERSTORM WARNING FOR
  WESTERN BOONE COUNTY - CENTRAL IOWA

* UNTIL 215 PM CDT
 
* SOME TOWNS AFFECTED
    OGDEN
    BOONE
    FRASER
    PILOT MOUND

* AT 150 PM RADAR INDICATED A SEVERE THUNDERSTORM NEAR THE INTERSECTION
  OF HIGHWAYS 30 AND 169 MOVING NORTHEAST AT 30 MPH. THIdS IS ABOUT 25
  MILES WEST OF AMES. 

* THE STORM WILL BE NEAR OGDEN AROUND 2 PM.

THIS IS A DANGEROUS STORM.  DO NOT GO OUTDOORS.

FELDT

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, 2:10 PM CDTSevere Thunderstorm WarningDMXBoone30 min
Jul 31, 3:52 PM CDTSevere Thunderstorm WarningDMXGrundy53 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.