Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 62, NWS Des Moines, IA

June 16, 1993Pocahontas County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 16, 1993, 6:02 AM CDT for Pocahontas County, Iowa. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Jun 16, 1993, 6:02 AM CDT (11:02 UTC)
Expired
Jun 16, 1993, 6:25 PM CDT
In force
12 hr
Issued by
NWS Des Moines, IA
Area
Whole counties

County Pocahontas County, IA

The nearest sounding before it

Aberdeen, SD (KHON), launched 00:00Z, 11.0 hours before the alert went out and 384 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, Aberdeen, SD at 00:00Z on 1993-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Aberdeen, SD at 00:00Z on 1993-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 361 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1375 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
361 m²/s²
0-3 km storm-relative helicity
661 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.1

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, Jun 16, 4:45 AM CDT, 1 hour 17 minutes before
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Special weather statement, Jun 16, 4:46 AM CDT, 1 hour 16 minutes before
IAZALL-161035-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
445 AM CDT WED JUN 16 1993

AT 425 AM CDT...THUNDERSTORMS WITH VERY HEAVY RAIN AND SMALL HAIL WERE
LOCATED IN NORTHWEST IOWA...10 MILES EAST OF EMMETSBURG...5 MILES WEST
OF ESTHERVILLE AND 10 MILES EAST OF SIBLEY.

THESE STORMS WERE PART OF A LARGER AREA OF SCATTERED THUNDERSTORMS WHICH
CONTINUED ACROSS NORTHERN AND WESTERN IOWA. THIS THUNDERSTORM AREA WAS
LOCATED NORTHWEST OF A LINE EXTENDING FROM THE MINNESOTA BORDER 60 MILES
NORTH OF WATERLOO...TO CHARLES CITY...TO ALGONA...25 MILES SOUTHEAST OF
COUNCIL BLUFFS. MOVEMENT WAS EAST-NORTHEAST AT 35 MILES AN HOUR.

THE STORMS ACROSS NORTH CENTRAL AND NORTHWEST IOWA WERE PRODUCING VERY
FREQUENT CLOUD TO GROUND LIGHTNING. RESIDENTS SHOULD TAKE LIGHTNING
SAFETY PRECUATIONS...STAY INSIDE YOUR HOME OR INSIDE THE ENCLOSED CAB OF
YOUR VEHICHLE. STAY AWAY FROM METAL OBJECTS WHICH COULD CONDUCT
ELzECTRICITY AND DO NOT TALK ON THE TELEPHONE.

R A PRENTICE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 15, 10:45 PM CDTSevere Thunderstorm WarningDMXClay, Dickinson45 min
Jun 16, 5:39 AM CDTSevere Thunderstorm WarningDMXPalo Alto36 min
Jun 16, 6:35 AM CDTSevere Thunderstorm WarningDMXHumboldt, Webster35 min
Jun 16, 7:18 AM CDTSevere Thunderstorm WarningDMXWebster27 min
Jun 16, 7:22 AM CDTTornado WarningDMXWebster23 min
Jun 16, 7:34 AM CDTSevere Thunderstorm WarningDMXHamilton, Wright26 min
Jun 16, 7:35 AM CDTSevere Thunderstorm WarningDMXFranklin35 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.