Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 59, NWS Quad Cities, IA

July 19, 1994Clayton County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 19, 1994, 10:10 PM CDT for Clayton County, Iowa. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jul 19, 1994, 10:10 PM CDT (03:10 UTC)
Expired
Jul 19, 1994, 10:45 PM CDT
In force
35 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Clayton County, IA

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 3.2 hours before the alert went out and 287 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 1994-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 503 joules per kilogram.LCLLFCEL10008507005003002001001 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, Minneapolis, MN at 00:00Z on 1994-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
503 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
682 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
343 m²/s²
Significant tornado parameter
0.8
Supercell composite
7.4

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
Jul 20, 1:18 AM CDTSevere Thunderstorm WarningDVNJones42 min
Jul 20, 1:34 AM CDTSevere Thunderstorm WarningDVNDubuque41 min
Jul 20, 2:15 AM CDTSevere Thunderstorm WarningDVNCedar60 min
Jul 19, 11:02 PM CDTSevere Thunderstorm WarningDVNGrant58 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.