Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 1, NWS Quad Cities, IA

April 14, 1994Delaware County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 14, 1994, 10:27 PM CDT for Delaware County, Iowa. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Apr 14, 1994, 10:27 PM CDT (03:27 UTC)
Expired
Apr 14, 1994, 11:00 PM CDT
In force
33 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Delaware County, IA

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 3.5 hours before the alert went out and 320 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 1994-04-15Temperature 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 1994-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939587897Sfc1 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
2199 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 14, 9:47 PM CDT, 40 minutes before
ILZ009-015-016-024-IAZ065>068-078-088-089-099-150500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
945 PM CDT THU APR 14 1994

...A TORNADO WATCH IS IN EFFECT FOR HENRY AND LEE COUNTIES IN IOWA...

AT 945 PM...SCATTERED THUNDERSTORMS WERE DEVELOPING JUST SOUTH OF
BURLINGTON AND OVER CEDAR COUNTY IN IOWA. THESE STORMS WERE MOVING
NORTH AND NORTHEAST AT 40 MPH.

THESE STORMS WILL BE INCREASING IN INTENSITY AND COVERAGE IN THE NEXT
FEW HOURS.

KEEP A WATCHFUL EYE TO THE SKY AND LISTEN TO LATER STATEMENTS ON NOAA
WEATHER RADIO STATION WXJ-73 MOLINE...ILLINOIS OR YOUR FAVORITE RADIO
OR TV STATION.

J NOEL
Special weather statement, Apr 14, 10:14 PM CDT, 13 minutes before
ILZ009-015-016-024-IAZ065>068-078-088-089-099-150400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
1010 PM CDT THU APR 14 1994

...A TORNADO WATCH IS IN EFFECT FOR HENRY AND LEE COUNTIES IN IOWA...

AT 1005 PM...A VERY STRONG THUNDERSTORM HAD DEVELOPED IN HENDERSON COUNTY
ILLINOIS NEAR OQUAWKA.  THIS STORM WAS MOVING NORTHEAST AT 50 MILES AN HOUR
AND SHOULD MOVE INTO MERCER COUNTY IN THE NEXT 15 MINUTES.  THIS STORM
SHOULD REACH VIOLA ILLINOIS AROUND 1030 PM.  THIS STORM WILL LIKELY CONTAIN
STRONG WINDS TO 50 MPH...PEA-SIZED TO MARBLE-SIZED HAIL...AND HEAVY RAINS.

NO STORMS WERE IN HENRY OR LEE COUNTIES IN IOWA YET BUT COULD DEVELOP AT
ANY TIME.  THE POTENTIAL FOR SEVERE WEfATHER REMAINS STRONG...SO STAY TUNED
TO NOAA WEATHER RADIO...TV...OR OTHER RADIO STATIONS FOR FURTHER
STATEMENTS OR WARNINGS.

T MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 14, 10:45 PM CDTSevere Thunderstorm WarningDVNClayton45 min
Apr 14, 10:51 PM CDTSevere Thunderstorm WarningDVNClinton24 min
Apr 14, 11:10 PM CDTSevere Thunderstorm WarningDVNJackson35 min
Apr 15, 12:09 AM CDTSevere Thunderstorm WarningDVNHenry36 min
Apr 15, 12:16 AM CDTSevere Thunderstorm WarningDVNJones29 min
Apr 15, 12:22 AM CDTSevere Thunderstorm WarningDVNDelaware38 min
Apr 15, 12:33 AM CDTSevere Thunderstorm WarningDVNCedar42 min
Apr 15, 12:40 AM CDTSevere Thunderstorm WarningDVNLouisa50 min
Apr 15, 12:49 AM CDTSevere Thunderstorm WarningDVNLee41 min
Apr 15, 1:00 AM CDTSevere Thunderstorm WarningDVNDes Moines30 min
Apr 15, 1:00 AM CDTSevere Thunderstorm WarningDVNMuscatine30 min
Apr 15, 1:29 AM CDTSevere Thunderstorm WarningDVNScott46 min
Apr 15, 2:15 AM CDTSevere Thunderstorm WarningDVNClinton60 min
Apr 15, 2:46 AM CDTSevere Thunderstorm WarningDVNScott59 min
Apr 14, 11:27 PM CDTSevere Thunderstorm WarningDVNJo Daviess33 min
Apr 15, 3:10 AM CDTSevere Thunderstorm WarningDVNWhiteside65 min
Apr 14, 11:18 PM CDTSevere Thunderstorm WarningDVNGrant27 min
Apr 14, 11:47 PM CDTSevere Thunderstorm WarningDVNLafayette28 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.