Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 37, NWS Des Moines, IA

June 6, 1995Hamilton County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 6, 1995, 4:25 PM CDT for Hamilton County, Iowa. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Jun 6, 1995, 4:25 PM CDT (21:25 UTC)
Expired
Jun 6, 1995, 4:55 PM CDT
In force
30 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Hamilton County, IA

The radar

The Des Moines radar (KDMX), 73 km from the middle of the area, began a volume at 21:24 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

Minneapolis, MN (KMPX), launched 12:00Z, 9.4 hours before the alert went out and 274 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, Minneapolis, MN at 12:00Z on 1995-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 33 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, Minneapolis, MN at 12:00Z on 1995-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
33 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
694 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDSM 062124 RRA
SVRDSM
IAC079-062155-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
425 PM CDT TUE JUN 6 1995

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHEASTERN HAMILTON COUNTY - CENTRAL IOWA

* UNTIL 455 PM CDT
 
* SOME TOWNS AFFECTED
    RURAL AREAS SOUTHEAST OF JEWELL

* AT 421 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES
  SOUTHEAST OF JEWELL ALONG INTERSTATE 35...OR 45 MILES NORTH OF
  DES |MOINES MOVING EAST AT 15 MPH.

* THE STORM WILL BE CROSS INTERSTATE 35 NEAR EXIT 128 BY 435 PM.

  PREPARE FOR HAIL UP TO ONE INCH IN DIAMETER.

PYTLAK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 6:09 PM CDTSevere Thunderstorm WarningDMXWinnebago36 min
Jun 6, 6:30 PM CDTSevere Thunderstorm WarningDMXWorth30 min
Jun 6, 6:35 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Hancock30 min
Jun 6, 6:45 PM CDTTornado WarningDMXWorth35 min
Jun 6, 6:55 PM CDTSevere Thunderstorm WarningDMXMitchell54 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.