Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 21, NWS Quad Cities, IA

April 25, 1994Delaware County, Dubuque County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 25, 1994, 3:54 PM CDT for Delaware County, Dubuque County, Iowa. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Apr 25, 1994, 3:54 PM CDT (20:54 UTC)
Expired
Apr 25, 1994, 4:30 PM CDT
In force
36 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

Counties Delaware County, IA, Dubuque County, IA

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.9 hours before the alert went out and 331 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, Green Bay/Straub, WI at 12:00Z on 1994-04-25Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 1994-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 200 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
535 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
200 m²/s²
0-3 km storm-relative helicity
337 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 KDBQ 252054 RRA
SVRDBQ
IAC055-061-252130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DUBUQUE IA
354 PM CDT MON APR 25 1994
 
THE NATIONAL WEATHER SERVICE IN DUBUQUE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  430 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST IOWA
 
   ...EASTERN DELAWARE COUNTY...DUBUQUE COUNTY
 
AT 352 PM CDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR NEAR
EARLEVILLE IN EASTERN DELAWARE COUNTY...30 MILES TO THE WEST OF THE
CITY OF DUBUQUE. THE SEVERE THUNDERSTORM WAS MOVING TO THE NORTHEAST
AT 25 MILES AN HOUR. SOME TOWNS IN THE PATH OF THIS SEVERE
THUNDERSTORM INCLUDE DYERSVILLE...EPSWORTH...AND FARLEY. THESE TOWNS
WILL BE AFFECTED BETWEEN NOW AND 430 PM CDT.
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE ST2ORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
 
 
ROWLAND
NNNN

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 25, 4:41 PM CDTSevere Thunderstorm WarningDVNDubuque34 min
Apr 25, 4:44 PM CDTSevere Thunderstorm WarningDVNDes Moines, Lee46 min
Apr 25, 5:39 PM CDTSevere Thunderstorm WarningDVNDes Moines, Lee51 min
Apr 25, 6:26 PM CDTSevere Thunderstorm WarningDVNHenry49 min
Apr 25, 6:40 PM CDTSevere Thunderstorm WarningDVNCedar50 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1994Every severe thunderstorm warning 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.