Alert archive / Iowa / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 42, NWS Des Moines, IA

May 19, 1996Winneshiek County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 19, 1996, 3:13 AM CDT for Winneshiek County, Iowa. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 19, 1996, 3:13 AM CDT (08:13 UTC)
Expired
May 19, 1996, 3:45 AM CDT
In force
32 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Winneshiek County, IA

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 8.2 hours before the alert went out and 216 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, Davenport, at 00:00Z on 1996-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3406 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, Davenport, at 00:00Z on 1996-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
3406 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
1292 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.5

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, May 19, 2:31 AM CDT, 42 minutes before
IAZ004-005-015-023-190900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
231 AM CDT SUN MAY 19 1996

THE TORNADO WATCH HAS BEEN CANCELLED FOR EMMET...PALO ALTO...
POCAHONTAS...AND KOSS|UTH COUNTIES. HOWEVER...IT REMAINS IN EFFECT
UNTIL 400 AM IN WINNEBAGO...HANCOCK AND WORTH COUNTIES.

PYTLAK

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 19, 1:23 AM CDTSevere Thunderstorm WarningDMXKossuth22 min
May 19, 2:40 AM CDTSevere Thunderstorm WarningDMXHoward35 min
May 19, 5:32 PM CDTSevere Thunderstorm WarningDMXBremer33 min
May 19, 5:54 PM CDTSevere Thunderstorm WarningDMXFayette51 min
May 19, 6:03 PM CDTSevere Thunderstorm WarningDMXMarshall32 min
May 19, 6:12 PM CDTSevere Thunderstorm WarningDMXBlack Hawk33 min
May 19, 6:24 PM CDTSevere Thunderstorm WarningDMXMarshall31 min
May 19, 6:58 PM CDTSevere Thunderstorm WarningDMXTama32 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1996Every severe thunderstorm warning in 1996

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.