Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 67, NWS Quad Cities, IA

August 18, 1994Dubuque County, Iowa; Jo Daviess County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 18, 1994, 8:23 PM CDT for Dubuque County, Iowa; Jo Daviess County, Illinois. It was in force for 37 min.

The area

The counties it named.

The facts

Issued
Aug 18, 1994, 8:23 PM CDT (01:23 UTC)
Expired
Aug 18, 1994, 9:00 PM CDT
In force
37 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

Counties Dubuque County, IA, Jo Daviess County, IL

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.4 hours before the alert went out and 303 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 00:00Z on 1994-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 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, Green Bay/Straub, WI at 00:00Z on 1994-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.1939Sfc1 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
7 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
600 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
70 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 7:28 PM CDTSevere Thunderstorm WarningDVNJackson32 min
Aug 19, 1:48 PM CDTSevere Thunderstorm WarningDVNClayton42 min
Aug 19, 2:28 PM CDTSevere Thunderstorm WarningDVNClayton32 min
Aug 19, 3:01 PM CDTSevere Thunderstorm WarningDVNClayton29 min
Aug 19, 3:32 PM CDTSevere Thunderstorm WarningDVNDubuque28 min
Aug 19, 3:52 PM CDTSevere Thunderstorm WarningDVNDubuque38 min
Aug 19, 4:20 PM CDTSevere Thunderstorm WarningDVNJackson25 min
Aug 19, 4:24 PM CDTSevere Thunderstorm WarningDVNJackson36 min
Aug 19, 4:57 PM CDTSevere Thunderstorm WarningDVNJackson33 min
Aug 19, 5:50 PM CDTSevere Thunderstorm WarningDVNDubuque, Jackson40 min
Aug 19, 6:16 PM CDTSevere Thunderstorm WarningDVNClinton44 min
Aug 19, 4:31 PM CDTSevere Thunderstorm WarningDVNJo Daviess29 min
Aug 19, 5:48 PM CDTSevere Thunderstorm WarningDVNWhiteside57 min
Aug 19, 1:36 PM CDTSevere Thunderstorm WarningDVNGrant39 min
Aug 19, 2:11 PM CDTSevere Thunderstorm WarningDVNGrant34 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1994Severe Thunderstorm Warnings in Illinois, 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.