Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 49, NWS Omaha, NE

July 8, 1993Shelby County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jul 8, 1993, 11:15 PM CDT for Shelby County, Iowa. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 8, 1993, 11:15 PM CDT (04:15 UTC)
Expired
Jul 9, 1993, 12:15 AM CDT
In force
60 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Shelby County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 4.3 hours before the alert went out and 97 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, Omaha, NE at 00:00Z on 1993-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3257 joules per kilogram.LCLEL10008507005003002001001 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, Omaha, NE at 00:00Z on 1993-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 square meters per square second.19395878Sfc1 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
3257 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
692 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
341 m²/s²
Significant tornado parameter
6.3
Supercell composite
27.6

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 Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 8, 8:33 PM CDTFlash Flood WarningOAXBurt, Dodge9 hr
Jul 8, 9:56 PM CDTSevere Thunderstorm WarningOAXJefferson, Saline, Seward49 min
Jul 8, 9:56 PM CDTSevere Thunderstorm WarningOAXButler49 min
Jul 8, 10:08 PM CDTSevere Thunderstorm WarningOAXGage, Lancaster52 min
Jul 8, 10:23 PM CDTSevere Thunderstorm WarningOAXCass, Otoe, Sarpy, Saunders52 min
Jul 8, 10:23 PM CDTSevere Thunderstorm WarningOAXDouglas52 min
Jul 8, 10:34 PM CDTSevere Thunderstorm WarningOAXDodge41 min
Jul 8, 10:51 PM CDTSevere Thunderstorm WarningOAXWashington69 min
Jul 8, 11:03 PM CDTSevere Thunderstorm WarningOAXGage, Lancaster27 min
Jul 8, 11:33 PM CDTSevere Thunderstorm WarningOAXGage, Johnson, Lancaster42 min
Jul 8, 9:07 PM CDTFlash Flood WarningOAXShelby4 hr
Jul 8, 10:49 PM CDTSevere Thunderstorm WarningOAXMills, Pottawattamie56 min
Jul 8, 10:49 PM CDTSevere Thunderstorm WarningOAXFremont56 min
Jul 8, 11:01 PM CDTSevere Thunderstorm WarningOAXHarrison, Pottawattamie44 min
Jul 8, 11:27 PM CDTSevere Thunderstorm WarningOAXMontgomery, Page48 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.