Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 85, NWS Des Moines, IA

July 25, 1995Mahaska County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 25, 1995, 5:23 PM CDT for Mahaska County, Iowa. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Jul 25, 1995, 5:23 PM CDT (22:23 UTC)
Expired
Jul 25, 1995, 6:05 PM CDT
In force
42 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Mahaska County, IA

The radar

The Des Moines radar (KDMX), 100 km from the middle of the area, began a volume at 22:25 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

Davenport, (KDVN), launched 12:00Z, 10.4 hours before the alert went out and 181 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 1995-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1995-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1870 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
-23 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 KDSM 252223 RRA
SVRDSM
IAC123-252305-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
523 PM CDT TUE JUL 25 1995

* SEVERE THUNDERSTORM WARNING FOR
  MAHASKA COUNTY - SOUTHEAST IOWA

* UNTIL 605 PM CDT
 
* SOME TOWNS AFFECTED
    NEW SHARON
    NORTHERN SECTIONS OF OSKALOOSA

* AT 520 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM JUST NORTH OF
  OSKALOOSA OR 25 MILES NORTHWEST OTTUMWA MOVING NORTHEAST 25 MPH.

* THE STORM WILL BE OVER HIGHWAY 63 AT 530 PM CDT.


  THIS IS A DANGEROUS STORM.  DO NOT GO OUTDOORS.




FORSTER/SMALL

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.