Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 74, NWS Des Moines, IA

July 8, 1995Story County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 8, 1995, 11:19 PM CDT for Story County, Iowa. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Jul 8, 1995, 11:19 PM CDT (04:19 UTC)
Expired
Jul 9, 1995, 12:05 AM CDT
In force
46 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Story County, IA

The radar

The Des Moines radar (KDMX), 40 km from the middle of the area, began a volume at 04:20 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 00:00Z, 4.3 hours before the alert went out and 250 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 00:00Z on 1995-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 25 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, Davenport, at 00:00Z on 1995-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 square meters per square second.193958Sfc1 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
25 J/kg
Mixed-layer CIN
-322 J/kg
Mixed-layer LCL
1505 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
166 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 090419 RRA
SVRDSM
IAC169-090505-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1119 PM CDT SAT JUL 8 1995

* SEVERE THUNDERSTORM WARNING FOR
  WESTERN STORY COUNTY - CENTRAL IOWA

* UNTIL 1205 AM CDT
 
* SOME TOWNS AFFECTED
    GILBERT
    STORY CITY
    AMES

* AT 1117 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM JUST NORTH OF
  STORY CITY OR 10 MILES NORTH OF AMES MOVING SOUTH 25 MPH.

* THE STORM WILL BE NEAR AMES AT 1135 PM CDT.

THIS IS A DANGEROUS STORM.  DO NOT GO OUTDOORS.




FORSTER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 9:27 PM CDTSevere Thunderstorm WarningDMXFranklin, Wright33 min
Jul 8, 9:33 PM CDTTornado WarningDMXWright32 min
Jul 8, 10:04 PM CDTSevere Thunderstorm WarningDMXWright31 min
Jul 8, 10:17 PM CDTSevere Thunderstorm WarningDMXHamilton43 min
Jul 8, 10:49 PM CDTTornado WarningDMXHamilton31 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.