Alert archive / Iowa / Tornado Warnings in 1993

Tornado Warning 7, NWS Quad Cities, IA

June 24, 1993Henry County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jun 24, 1993, 4:10 PM CDT for Henry County, Iowa. It was in force for 20 min.

The area

The counties it named.

The facts

Issued: Jun 24, 1993, 4:10 PM CDT (21:10 UTC)
Expired: Jun 24, 1993, 4:30 PM CDT
In force: 20 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Henry County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.2 hours before the alert went out and 406 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 562 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 221 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMLI 242110
TORMLI
IAC087-242145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE MOLINE IL
410 PM CDT THU JUN 24 1993

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 445 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE SOUTHEAST PART OF IOWA
      HENRY

AT 408 PM CDT...POSSIBLE TORNADO WAS INDICATED BY RADAR IN
SOUTHERN HENRY COUNTY IOWA 5 MILES NORTH OF SALEM.  THIS
STORM WAS MOVING NORTHEAST AT 30 MILES AN HOUR...AN WILL
REACH THE TOWN OF NEW LONDON BY 420 PM CDT.

THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.

REPORTS OF TORNADOES OR TORNADO DAMAGE SHOULD BE GIVEN TO A LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

IF YOU ARE CAUGHT OUTSIDE...FIND SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...TAKE SHELTER IN A CULVERT...DITCH...
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAGUEt

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jun 24, 2:20 PM CDT, 1 hour 50 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE MOLINE IL
220 PM CDT THU JUN 24 1993

...ATTN SELS...

PRELIMINARY STORM REPORTS FOR JUNE 24 1993...REF WW 492

COUNTY          TIME (CDT)     EVENT

MERCER IL       1209 PM        DISTRICT 7 REPORTED STRONG WINDS EST.
                               AT 35 MPH AT VIOLA.

HENRY IL        1238 PM        GALVA SPOTTER RELAYED REPORT FRM ANOTHER
                               SPOTTER IN ANDOVER OF WINDS NEAR 50 MPH.

HENRY IL        100 PM         DISTRICT 7 REPORTED STRONG WINDS EST. AT
                               50 MPH KEWANEE.

HENRY IL        148 PM         KEWANEE POLICE..SEVERAL LARGE LIMBS TREE
                               BLOWN DOWN BETWEEN 120 AND 125 PM ON
                               ELLIOT STREET...NORTH LEXINGTON AND
                               SOUTH GRACE STREET.  NEEDED CHAIN SAW
                               TO GET THEM REMOVED

DICKEY

Local storm report, Jun 24, 2:23 PM CDT, 1 hour 47 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE MOLINE IL
220 PM CDT THU JUN 24 1993

...ATTN SELS...

PRELIMINARY STORM REPORTS FOR JUNE 24 1993...REF WW 492

COUNTY          TIME (CDT)     EVENT

MERCER IL       1209 PM        DISTRICT 7 REPORTED STRONG WINDS EST.
                               AT 35 MPH AT VIOLA.

HENRY IL        1238 PM        GALVA SPOTTER RELAYED REPORT FRM ANOTHER
                               SPOTTER IN ANDOVER OF WINDS NEAR 50 MPH.

HENRY IL        100 PM         DISTRICT 7 REPORTED STRONG WINDS EST. AT
                               50 MPH KEWANEE.

HENRY IL        148 PM         KEWANEE POLICE..SEVERAL LARGE LIMBS TREE
                               BLOWN DOWN BETWEnEN 120 AND 125 PM ON
                               ELLIOT STREET...NORTH LEXINGTON AND
                               SOUTH GRACE STREET.  NEEDED CHAIN SAW
                               TO GET THEM REMOVED

DICKEY

Special weather statement, Jun 24, 3:20 PM CDT, 50 minutes before

IAZ030-041-042-053-054-ILZ001-WIZ018-242115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
320 PM CDT THU JUN 24 1993

...SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR ANY COUNTIES OF
THE TRI-STATES...

...A FLOOD WARNING IS IN EFFECT FOR LOW LYING AREAS OF THE
TRI-STATES ALONG THE MISSISSIPPI RIVER...

...A FLASH FLOOD WATCH IS IN EFFECT FOR LAFAYETTE AND GRANT COUNTIES
THIS AFTERNOON...

AT 310 PM CDT...RADAR INDICATED A LINE OF SHOWERS AND THUNDERSTORMS IN
LACROSSE AREA SOUTHWESTWARD TO JUST EAST OF WATERLOO. THIS LINE OF
SHOWERS HAS BEEN WEAKENING AND WAS MOVING EASTWARD. THESE SHOWERS
WILL MOVE INTO THE WESTERN HALF OF THE TRI-STATES BETWEEN 330 PM
AND 40n0 PM CDT. IN THE TRI-STATES AT THIS TIME NO SHOWERS OR
THUNDERSTORMS WERE BEING DETECTED.

PERSONS WITH RIVER INTERESTS IN THE TRI-STATES SHOULD TAKE PROTECTIVE
MEASURES IF IN LOW LYING AREAS ADJACENT TO THE MISSISSIPPI RIVER.

ROWLAND

Special weather statement, Jun 24, 3:20 PM CDT, 50 minutes before

IAZ030-041-042-053-054-ILZ001-WIZ018-242115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
320 PM CDT THU JUN 24 1993

...SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR ANY COUNTIES OF
THE TRI-STATES...

...A FLOOD WARNING IS IN EFFECT FOR LOW LYING AREAS OF THE
TRI-STATES ALONG THE MISSISSIPPI RIVER...

...A FLASH FLOOD WATCH IS IN EFFECT FOR LAFAYETTE AND GRANT COUNTIES
THIS AFTERNOON...

AT 310 PM CDT...RADAR INDICATED A LINE OF SHOWERS AND THUNDERSTORMS IN
LACROSSE AREA SOUTHWESTWARD TO JUST EAST OF WATERLOO. THIS LINE OF
SHOWERS HAS BEEN WEAKENING AND WAS MOVING EASTWARD. THESE SHOWERS
WILL MOVE INTO THE WESTERN HALF OF THE TRI-STATES BETWEEN 330 PM
AND 400 PM CDT. IN THE TRI-STATES AT THIS TIME NO SHOWERS OR
THUNDERSTORMS WERE BEING DETECTED.

PERSONS WITH RIVER INTERESTS IN THE TRI-STATES SHOULD TAKE PROTECTIVE
MEASURES IF IN LOW LYING AREAS ADJACENT TO THE MISSISSIPPI RIVER.

ROWLAND

Special weather statement, Jun 24, 3:31 PM CDT, 39 minutes before

ILZ004-IAZ078-088-089-099-242100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
330 PM CDT THUN JUN 24 1993

...STRONG THUNDERSTORMS ARE DEVELOPING IN SOUTHEAST IOWA...

AT 330 PM CDT...STRONG THUNDERSTORMS WITH HEAVY RAIN WERE DEVELOPING
IN THE SOUTHEAST IOWA COUNTIES OF HENRY...LOUISA...AND FAR WESTERN
MUSCATINE.

THE STRONGEST OF THESE STORMS WERE IN NORTHEAST HENRY COUNTY NEAR
WINFIELD...AND EXTENDED INTO WESTERN LOUISA COUNTY.
OTHER STRONG STORMS WERE MOVING INTO THE WEST PORTION OF LEE COUNTY
IN EXTREME SOUTHEAST IOWA.

THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR..AND
WERE ALSO DEVELOPING RAPIDLY.  NEW STORM DEVELOPMENT WILL BE POSSIBLE
JUST ABOUT ANYWHERE ACROSS THE BISTATE REGION.
.
STRONG STORMS WILL MOVE ACROSS THE IOWA COUNTIES OF MUSCATINE...
HENRY...LOUISA...DES MOINES...AND LEE OVER THE NEXT COUPLE OF
HOURS.  VERY HEAVY RAIN AND SMALL HAIL CAN BE EXPECTED WITH
THESE STORMS.

LAGUE

Special weather statement, Jun 24, 3:31 PM CDT, 39 minutes before

ILZ004-IAZ078-088-089-099-242100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
330 PM CDT THUN JUN 24 1993

...STRONG THUNDERSTORMS ARE DEVELOPING IN SOUTHEAST IOWA...

AT 330 PM CDT...STRONG THUNDERSTORMS WITH HEAVY RAIN WERE DEVELOPING
IN THE SOUTHEAST IOWA COUNTIES OF HENRY...LOUISA...AND FAR WESTERN
MUSCATINE.

THE STRONGEST OF THESE STORMS WERE IN NORTHEAST HENRY COUNTY NEAR
WINFIELD...AND EXTENDED INTO WESTERN LOUISA COUNTY.
OTHER STRONG STORMS WERE MOVING INTO THE WEST PORTION OF LEE COUNTY
IN EXTREME SOUTHEAST IOWA.

THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR..AND
WERE ALSO DEVELOPING RAPIDLY.  NEW STORM DEVELOPMENT WILL BE POSSIBLE
JUST ABOUT ANYWHERE ACROSS THE BISTATE REGION.
.
STRONG STORMS WILL MOVE ACROSS THE IOWA COUNTIES OF MUSCATINE...
HENRY...LOUISA...DES MOINES...AND LEE OVER THE NEXT COUPLE OF
HOURS.  VERY HEAVY RAIN AND SMALL HAIL CAN BE EXPECTED WITH
THESE STORMS.

LAGUE

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 24, 4:12 PM CDT	Tornado Warning	DVN	Louisa	33 min
Jun 24, 5:55 PM CDT	Flash Flood Warning	DVN	Des Moines	2 hr

Nearby

Tornado Warnings in Iowa, 1993 Every tornado warning in 1993 Tornadoes 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.