Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 78, NWS Des Moines, IA

July 22, 1995Audubon County, Cass County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 22, 1995, 2:31 AM CDT for Audubon County, Cass County, Iowa. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Jul 22, 1995, 2:31 AM CDT (07:31 UTC)
Expired
Jul 22, 1995, 3:10 AM CDT
In force
39 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Audubon County, IA, Cass County, IA

The radar

The Des Moines radar (KDMX), 102 km from the middle of the area, began a volume at 07:33 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, 7.5 hours before the alert went out and 123 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 00:00Z on 1995-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2611 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1995-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
2611 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1488 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDSM 220731 RRA
SVRDSM
IAC009-029-220810-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
231 AM CDT SAT JUL 22 1995

* SEVERE THUNDERSTORM WARNING FOR
  AUDUBON COUNTY - WEST CENTRAL IOWA
  CASS COUNTY - SOUTHWEST IOWA

* UNTIL 310 AM CDT
 
* SOME TOWNS AFFECTED
    AUDUBON
    ATLANTIC
    HAMLIN
    BRAYTON

* AT 226 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM EXTENDING FROM
  HARLAN TO OAKLAND OR ABOUT 20 TO 30 MILES NORTHEAST AND EAST OF
  COUNCIL BLUFFS MOVING EAST AT 30 MILES AN HOUR.

* THE STORM WILL BE NEAR AUDUBON AND ATLANTIC AT ABOUT 245 AM.

THIS IS A DANGEROUS STORM.  DO NOT GO OUTDOORS.

SMALL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 5:21 PM CDTSevere Thunderstorm WarningDMXBremer29 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; radar from the NEXRAD Level II archive.