Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 71, NWS Quad Cities, IA

July 27, 1993Delaware County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 27, 1993, 8:34 PM CDT for Delaware County, Iowa. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Jul 27, 1993, 8:34 PM CDT (01:34 UTC)
Expired
Jul 27, 1993, 9:30 PM CDT
In force
56 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, 1.6 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 1993-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 175 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, Minneapolis, MN at 00:00Z on 1993-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
175 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1555 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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 27, 8:51 PM CDTSevere Thunderstorm WarningDVNJones55 min
Jul 27, 9:19 PM CDTSevere Thunderstorm WarningDVNDubuque27 min
Jul 27, 10:46 PM CDTSevere Thunderstorm WarningDVNJones44 min
Jul 28, 12:37 AM CDTSevere Thunderstorm WarningDVNScott53 min
Jul 28, 1:14 AM CDTSevere Thunderstorm WarningDVNMuscatine61 min
Jul 28, 2:55 AM CDTSevere Thunderstorm WarningDVNHenry35 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1993Every severe thunderstorm warning in 1993

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.