Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 75, NWS Des Moines, IA

July 15, 1995Dallas County, Guthrie County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 15, 1995, 2:57 PM CDT for Dallas County, Guthrie County, Iowa. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Jul 15, 1995, 2:57 PM CDT (19:57 UTC)
Expired
Jul 15, 1995, 3:30 PM CDT
In force
33 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Dallas County, IA, Guthrie County, IA

The radar

The Des Moines radar (KDMX), 46 km from the middle of the area, began a volume at 19:57 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 12:00Z, 8.0 hours before the alert went out and 179 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 1995-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 856 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 1995-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
856 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
1125 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDSM 151955 RRA
SVRDSM
IAC049-077-152030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
257 PM CDT SAT JUL 15 1995

* SEVERE THUNDERSTORM WARNING FOR
  NORTHWESTERN DALLAS COUNTY - CENTRAL IOWA
  GUTHRIE COUNTY - WEST CENTRAL IOWA

* UNTIL 330 PM CDT
 
* SOME TOWNS AFFECTED
    PANORA
    PERRY
    DAWSON
    YALE

* AT 2:55 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM OVER PANORA OR
  40 WEST OF DESD MOINES MOVING NORTHEAST AT 20 MPH..

* THE STORM WILL BE INTO PERRY BY 3:20 PM CDT.

  THIS IS A DANGEROUS STORM.  DO NOT GO OUTDOORS.




CHB

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; radar from the NEXRAD Level II archive.