Alert archive / Iowa / Tornado Warnings in 1994

Tornado Warning 13, NWS Des Moines, IA

June 18, 1994Humboldt County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 18, 1994, 7:12 PM CDT for Humboldt County, Iowa. It was in force for 18 min.

The area

The counties it named.

The facts

Issued
Jun 18, 1994, 7:12 PM CDT (00:12 UTC)
Expired
Jun 18, 1994, 7:30 PM CDT
In force
18 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Humboldt County, IA

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 0.2 hours before the alert went out and 236 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 00:00Z on 1994-06-19Temperature 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, Minneapolis, MN at 00:00Z on 1994-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1654 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
139 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 190014
TORDSM
IAC091-190030-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
712 PM CDT SAT JUN 18 1994
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  730 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH CENTRAL IOWA
 
   ...ALL OF HUMBOLDT COUNTY
 
AT 710 PM CDT DOPPLER RADAR CONTINUES TO SHOW A TORDANDIC CIRCULATION IN
HUMBOLT COUNTY. SPOTTERS HAVE REPORTED A TORNADO IN THE NORTHERN PORTION
OF THE COUNTY NEAR HARDY...30 MILES NORTH OF FORT DODGE...MOVING
SOUTHWEST AT 15 MILES AN HOUR.
 
CITIES IN THE PATH OF THIS STORM ARE RUTLAND...DAKOTA CITY...AND GILMORE
CITY.
 
 
IF YOU ARE CAUGHT OUTSIDE...S6EEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
 
 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 2:51 PM CDTSevere Thunderstorm WarningDMXGrundy39 min
Jun 19, 4:32 PM CDTSevere Thunderstorm WarningDMXStory28 min
Jun 19, 4:48 PM CDTTornado WarningDMXHardin27 min
Jun 19, 5:44 PM CDTSevere Thunderstorm WarningDMXLinn31 min
Jun 19, 6:09 PM CDTSevere Thunderstorm WarningDMXBenton36 min

Nearby

Tornado Warnings in Iowa, 1994Every tornado warning in 1994Tornadoes in 1994

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.