Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 6, NWS Sioux Falls, SD

June 7, 1993Cherokee County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 7, 1993, 4:35 AM CDT for Cherokee County, Iowa. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
Jun 7, 1993, 4:35 AM CDT (09:35 UTC)
Expired
Jun 7, 1993, 5:15 AM CDT
In force
40 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Cherokee County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.6 hours before the alert went out and 169 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 1993-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 645 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, Omaha, NE at 00:00Z on 1993-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 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
645 J/kg
Mixed-layer CIN
-266 J/kg
Mixed-layer LCL
547 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.7

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 7, 3:32 AM CDT, 1 hour 3 minutes before
IAZ013-020-SDZ066-070930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
327 AM CDT MON JUN 7 1993

...THUNDERSTORMS WERE MOVING TOWARD SHELDON...

AT 325 AM CDT STRONG THUNDERSTORMS WERE MOVING TOWARD SHELDON IOWA WHICH
IS 55 MILES NORTHEAST OF SIOUX CITY.  THE STORMS WERE MOVING NORTHEAST
AT 30 MILES AN HOUR AND SHOULD BE IN SHELDON BY 4 AM.  HEAVY RAIN AND
FREQUENT LIGHTNING WILL OCCUR WITH THESE STORMS.

OTHER THUNDERSTORMS WERE LOCATED NEAR JEFFERSON AND 5 MILES SOUTHEAST OF
BERESFORD IN UNION COUNTY.  THESE STORMS SHOULD MOVE INTO ALCESTER BY
4 AM AND HINTON IOWA BY 430 AM.  A SEVERE THUNDERSTORM WATCH REMAINS IN
EFFECT FOR UNION COUNTY UNTIL 7 AM THIS MORNING.

IRELAND
Special weather statement, Jun 7, 3:38 AM CDT, 57 minutes before
SDZ012-015>020-071000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
340 AM CDT MON JUN 7 1993

...STRONG THUNDERSTORMS CONTINUE TO DEVELOP...

CLUSTERS OF THUNDERSTORMS CONTINUE TO DEVELOP IN THE TRI/STATE AREA
AROUND SIOUX FALLS AT 335 AM. THESE THUNDERSTORMS COULD PRODUCE
LOCALLY VERY HEAVY RAIN...BRIEF HAIL...AND GUSTY WINDS AS THEY MOVE
NORTHEAST ABOUT 30 MPH.

EARLIER AROUND 230 AM CDT TWO INCH DIAMETER HAIL WAS REPORTED 9 MILES
NORTHWEST OF BERESFORD ALONG WITH 3 1/2 INCHES OF RAIN. ALSO AROUND 2
INCHES OF RAIN OCCURRED IN THE CANTON AREA. THESE LOCALLY HEAVY RAINS
COULD CAUSE LOCAL FLOODING PROBLEMS.

THERE IS THE POSSIBILITY OF MORE STORM DEVELOPMENT THE REMAINDER OF
TONIGHT ACROSS SOUTHCENTRAL AND SOUTHEAST SOUTH DAKOTA. A FLASH FLOOD
WATCH IS IN EFFECT FOR SOUTHEAST SOUTH DAKOTA THROUGH TODAY. IF A
THUNDERSTORM APPROACHES YOUR AREA...SEEK SHELTER INSIDE A REINFORCED
BUILDING IMMEDIATELY.

RYRHOLM
P
Special weather statement, Jun 7, 3:40 AM CDT, 55 minutes before
SDZ010-011-015-016-017-018-019-020-070940-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
340 AM CDT MON JUN 7 1993

...SEVERE THUNDERSTORM WATCH SOUTHERN SOUTH DAKOTA UNTIL 700 AM CDT...

AT 330 AM CDT...SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN AND
HAIL...CONTINUED OVER PARTS OF CENTRAL AND EASTERN SOUTH DAKOTA.

THESE STORMS WERE MOSTLY SOUTH OF A LINE FROM RIDGEVIEW/30 MILES SOUTHWEST
OF MOBRIDGE TO REVILLO/25 MILES EAST OF WATERTOWN WITH THE STRONGEST
STORMS LOCATED 5 MILES NORTHEAST OF VIVIAN/20 MILES SOUTH OF PIERRE...
5 MILES NORTHEAST OF HIGHMORE/35 MILES SOUTHEAST OF GETTYSBURG AND 10 MILES
SOUTHWEST OF MADISON/30 MILES NORTHWEST OF SIOUX FALLS.

THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...HAIL AND STRONG
GUSTY WINDS.  PERSONS IN CENTRAL AND EAST CENTRAL SOUTH DAKOTA SHOULD
REMAIN ON THE ALERT FOR THREATENING WEATHER AND SEEK SHELTER IF SIGHTED.

MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR.

PFEIFFER

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Special weather statement, Jun 7, 3:44 AM CDT, 51 minutes before
SDZ010-011-015-016-017-018-019-020-070940-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
340 AM CDT MON JUN 7 1993

...SEVERE THUNDERSTORM WATCH SOUTHERN SOUTH DAKOTA UNTIL 700 AM CDT...

AT 330 AM CDT...SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN AND
HAIL...CONTINUED OVER PARTS OF CENTRAL AND EASTERN SOUTH DAKOTA.

THESE STORMS WERE MOSTLY SOUTH OF A LINE FROM RIDGEVIEW/30 MILES SOUTHWEST
OF MOBRIDGE TO REVILLO/25 MILES EAST OF WATERTOWN WITH THE STRONGEST
STORMS LOCATED 5 MILES NORTHEAST OF VIVIAN/20 MILES SOUTH OF PIERRE...
5 MILES NORTHEAST OF HIGHMORE/35 MILES SOUTHEAST OF GETTYSBURG AND 10 MILES
SOUTHWEST OF MADISON/30 MILES NORTHWEST OF SIOUX FALLS.

THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...HAIL AND STRONG
GUSTY WINDS.  PERSONS IN CENTRAL AND EAST CENTRAL SOUTH DAKOTA SHOULD
REMAIN ON THE ALERT FOR THREATENING WEATHER AND SEEK SHELTER IF SIGHTED.

MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR.

PFEIFFER
Special weather statement, Jun 7, 4:01 AM CDT, 34 minutes before
IAZ013-020-SDZ066-071000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
401 AM CDT MON JUN 7 1993

...STRONG THUNDERSTORMS LOCATED IN OBRIEN AND PLYMOUTH COUNTIES...

AT 4 AM CDT STRONG THUNDERSTORMS WERE LOCATED 5 MILES WEST OF HARTLEY IN
OBRIEN COUNTY...65 MILES NORTHEAST OF SIOUX CITY.  THIS STORM WAS MOVING
NORTHEAST AT 30 MILES AN HOUR AND WILL ENTER HARTLEY BY 410 AM.  VERY
HEAVY RAIN ALONG WITH FREQUENT LIGHTNING IS POSSIBLE.

OTHER STRONG THUNDERSTORMS WERE LOCATED AT LE MARS AND 5 MILES EAST OF
HINTON IN PLYMOUTH COUNTY.  THESE STORMS WERE MOVING EAST AT 30 MILES AN
HOUR AND WERE ALSO PRODUCING VERY HEAVY RAIN AND FREQUENT LIGHTNING.
THE TOWNS OF REMSEN AND KINGSLEY SHOULD SEE THESE STORMS BY 430 AM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR UNION COUNTY SOUTH
DAKOTA UNTIL 7 AM.

IRELAND
Special weather statement, Jun 7, 4:05 AM CDT, 30 minutes before
IAZ013-020-SDZ066-071000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
401 AM CDT MON JUN 7 1993

...STRONG THUNDERSTORMS LOCATED IN OBRIEN AND PLYMOUTH COUNTIES...

AT 4 AM CDT STRONG THUNDERSTORMS WERE LOCATED 5 MILES WEST OF HARTLEY IN
OBRIEN COUNTY...65 MILES NORTHEAST OF SIOUX CITY.  THIS STORM WAS MOVING
NORTHEAST AT 30 MILES AN HOUR AND WILL ENTER HARTLEY BY 410 AM.  VERY
HEAVY RAIN ALONG WITH FREQUENT LIGHTNING IS POSSIBLE.

OTHER STRONG THUNDERSTORMS WERE LOCATED AT LE MARS AND 5 MILES EAST OF
HINTON IN PLYMOUTH COUNTY.  THESE STORMS WERE MOVING EAST AT 30 MILES AN
HOUR AND WERE ALSO PRODUCING VERY HEAVY RAIN AND FREQUENT LIGHTNING.
THE TOWNS OF REMSEN AND KINGSLEY SHOULD SEE THESE STORMS BY 430 AM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR UNION COUNTY SOUTH
DAKOTA UNTIL 7 AM.

IRELAND

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 7, 1:06 AM CDTSevere Thunderstorm WarningFSDClay, Yankton54 min
Jun 7, 2:02 AM CDTSevere Thunderstorm WarningFSDLincoln, Turner43 min
Jun 7, 4:43 PM CDTSevere Thunderstorm WarningFSDMinnehaha, Moody47 min
Jun 7, 5:33 PM CDTSevere Thunderstorm WarningFSDRock42 min
Jun 7, 5:54 PM CDTSevere Thunderstorm WarningFSDPipestone41 min
Jun 7, 5:59 PM CDTTornado WarningFSDRock36 min
Jun 7, 6:40 PM CDTTornado WarningFSDNobles35 min
Jun 7, 3:52 AM CDTSevere Thunderstorm WarningFSDOsceola38 min
Jun 7, 4:21 AM CDTSevere Thunderstorm WarningFSDPlymouth19 min
Jun 7, 4:50 AM CDTSevere Thunderstorm WarningFSDO'Brien25 min
Jun 7, 5:33 PM CDTSevere Thunderstorm WarningFSDLyon32 min
Jun 7, 6:34 PM CDTTornado WarningFSDO'Brien26 min
Jun 7, 6:39 PM CDTTornado WarningFSDO'Brien21 min
Jun 7, 6:44 PM CDTTornado WarningFSDLyon, Sioux21 min
Jun 7, 6:50 PM CDTTornado WarningFSDOsceola25 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.