Alert archive / Iowa / Tornado Warnings in 1993

Tornado Warning 9, NWS Quad Cities, IA

July 2, 1993Clinton County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jul 2, 1993, 8:43 PM CDT for Clinton County, Iowa. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Jul 2, 1993, 8:43 PM CDT (01:43 UTC)
Expired
Jul 2, 1993, 9:45 PM CDT
In force
62 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

County Clinton County, IA

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.7 hours before the alert went out and 348 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, Green Bay/Straub, WI at 00:00Z on 1993-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 274 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, Green Bay/Straub, WI at 00:00Z on 1993-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 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
274 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1041 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLI 030143
TORMLI
IAC045-030245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE MOLINE IL
843 PM CDT FRI JUL 2 1993

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE EXTREME EAST PART OF IOWA
      NORTHERN CLINTON

AT 835 PM CDT CLINTON COUNTY DEPUTIES REPORTED A FUNNEL CLOUD
ALOFT JUST NORTH OF DELMAR IOWA.  THE STORM WAS MOVING EAST AT
25 MILES AN HOUR.  THE STORM WILL BE MOVING THORUGH THE COMMUNTIES
OF BROWNS BEFORE 900 PM AND NEAR CHARLOTTE BY 815 PM.

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO.  CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS.  IF YOU ARE CAUGHT IN THE PATH OF
A TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING.  IF NO
STRUCTURE IS NEARBY...TAKE SHELTER IN A DITCH OR LOW SPOT.

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.

IF YOU LIVE IN A HOME OR APARTMENT...FIND SHELTER IN THE INNERMOST
PORTION OF THE BUILDING ON THE LOWEST FLOOR.  GET TO A BASEMENT IF
ONE IS AVAILABLE.  AVOID WINDOWS.  PROTECT YOURSELF FROM FLYING
DEBRIS WITH CUSHIONS...BLANKETS...OR PILLOWS.

GOEHRING 0142Z

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

Special weather statement, Jul 2, 6:14 PM CDT, 2 hours 29 minutes before
ILZ004-IAZ078-088-089-099-032330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
614 PM CDT FRI JUL 2 1993

...THUNDERSTORMS SCATTERED ALONG A LINE...

THUNDERSTORMS CONTINUE TO DEVELOP ALONG A LINE FROM CENTRAL CEDAR COUNTY
THROUGH WEST CENTRAL CLINTON ON TO NORTHEASTERN CLINTON COUNTY IN IOWA.
THUNDERSTORMS HAVE BEEN SCATTERED ALONG THIS LINE AND THEY CONTINUE TO
DEVELOP AND DISSIPATE ALONG THE LINE.  THUNDERSTORMS WILL DEVELOP RAPIDLY
ALONG THIS LINE AND MOVE EAST AT 30 MILES AN HOUR.

THESE STORMS WILL PRODUCE BRIEF HEAVY RAIN...STORNG GUSTY WINDS AND
DANGEROUS CLOUD TO GROUND LIGHTNING.  THIS LINE WILL SLOWLY DRIFT
SOUTHEAST AS THE EVENING PROGRESSES.  BY SUNSET THIS LINE OF SCATTERED
THUNDERSTORMS SHOULD LIE ACROSS NORTHWESTERN MUSCATINE COUNTY...
NORTHEAST THROUGH SOUTHEASTERN CEDAR COUNTY AND INTO NORTHERN SCOTT
AND SOUTHERN CLINTON COUNTY ALL IN IOWA.  EVEN THOUGH THERE IS NO
THUNDERSTORM ACTIVITY ELSEWHERE...THUNDERSTORMS CAN DEVELOP RAPIDLY
IN THIS TYPE OF WEATHER SCENARIO.  KEEP AN EYE TO THE SKY AND
KEEP ABREAST OF THE LATEST WEATHER FORECAST AS THUNDERSTORMS WILL
BE LIKELY THROUGH MOST OF THE NIGHT.

GOEHRING
Special weather statement, Jul 2, 6:15 PM CDT, 2 hours 28 minutes before
ILZ004-IAZ078-088-089-099-032330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
614 PM CDT FRI JUL 2 1993

...THUNDERSTORMS SCATTERED ALONG A LINE...

THUNDERSTORMS CONTINUE TO DEVELOP ALONG A LINE FROM CENTRAL CEDAR COUNTY
THROUGH WEST CENTRAL CLINTON ON TO NORTHEASTERN CLINTON COUNTY IN IOWA.
THUNDERSTORMS HAVE BEEN SCATTERED ALONG THIS LINE AND THEY CONTINUE TO
DEVELOP AND DISSIPATE ALONG THE LINE.  THUNDERSTORMS WILL DEVELOP RAPIDLY
ALONG THIS LINE AND MOVE EAST AT 30 MILES AN HOUR.

THESE STORMS WILL PRODUCE BRIEF HEAVY RAIN...STORNG GUSTY WINDS AND
DANGEROUS CLOUD TO GROUND LIGHTNING.  THIS LINE WILL SLOWLY DRIFT
SOUTHEAST AS THE EVENING PROGRESSES.  BY SUNSET THIS LINE OF SCATTERED
THUNDERSTORMS SHOULD LIE ACROSS NORTHWESTERN MUSCATINE COUNTY...
NORTHEAST THROUGH SOUTHEASTERN CEDAR COUNTY AND INTO NORTHERN SCOTT
AND SOUTHERN CLINTON COUNTY ALL IN IOWA.  EVEN THOUGH THERE IS NO
THUNDERSTORM ACTIVITY ELSEWHERE...LTHUNDERSTORMS CAN DEVELOP RAPIDLY
IN THIS TYPE OF WEATHER SCENARIO.  KEEP AN EYE TO THE SKY AND
KEEP ABREAST OF THE LATEST WEATHER FORECAST AS THUNDERSTORMS WILL
BE LIKELY THROUGH MOST OF THE NIGHT.

GOEHRING
Special weather statement, Jul 2, 7:38 PM CDT, 1 hour 5 minutes before
IAZ008-030145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
ISSUED BY WATERLOO IA
738 PM CDT FRI JUL 2 1993

...STRONG THUNDERSTORMS IN SOUTHERN JONES COUNTY...

AT 730 PM RADAR INDICATED VERY STRONG THUNDERSTORMS IN SOUTHERN JONES
COUNTY 30 MILES SOUTHWEST OF DUBUQUE NEAR OXFORD JUNCTION. THESE STORMS
WERE SLOWLY MOVING TO THE EAST AT 15 TO 20 MILES AN HOUR. REPORTS FROM
THE OXFORD JUNCTION AREA CONFIRM HEAVY RAIN AND FREQUENT LIGHTNING.

THESE STORMS WILL LINGER IN EXTREME SOUTHERN JONES COUNTY FOR THE NEXT
HOUR. RADAR INDICATES NO SEVERE THUNDERSTORMS AT THIS TIME. HOWEVER
THESE STORMS ARE CAPABLE OF PRODUCING BRIEF HEAVY DOWNPOURS...SMALL
HAIL AND WIND HGUSTS UP TO 45 MILES AN HOUR.

STAY TUNED TO LOCAL RADIO AND TELEVISION STATIONS FOR ADDITIONAL UPDATES
ON THESE STORMS.

DP
Special weather statement, Jul 2, 7:41 PM CDT, 1 hour 2 minutes before
ILZ004-IAZ078-088-089-099-030130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
741 PM CDT FRI JUL 2 1993

...THUNDERSTORMS ACROSS NORTHERN CLINTON COUNTY IOWA...

INTENSE THUNDERSTORMS WERE ON THE CEADAR/JONES COUNTY LINE AT 725 PM
AND JUST MOVING INTO NORTHWESTERN CLINTON COUNTY ALL IN IOWA.
STORMS WERE MOVING EAST AT 25 MILES AN HOUR.  A JONES COUNTY SHERIFF
REPORTED ALOT OF HEAVY RAIN AND LIGHTNING WITH THIS STORM.

AT THEIR CURRENT SPEED AND DIRECTION THE STORMS SHOULD MOVE JUST
TO THE NORTH OF CLINTON.  HOWEVER...THUNDERSTORMS MAY DEVELOP TO
THE SOUTH OF THESE STORMS AND MOVE OVER CLINTON BY 830 PM.  PEOPLE
ATTENDING THE RIVERBOAT DAYS IN CLINTON IOWA SHOULD BE ON THE LOOK
OUT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND BE PREPARED TO MOVE
TO A SHELTER IF THESE STORMS APPROACH.  STONG GUSTY WINDS ARE ALSO
POSSIBLE WITH THESE STORMS.
.
MORE STORMS WERE ACROSS IOWA COUNTY IN IOWA THEY WERE MOVING VERY
SLOWLY TO THE EAST/SOUTHEAST AT AROUND 15 MILES AN HOUR.  STORMS
WILL BE IN THE TWO STATE REGION FOR MOST OF THE NIGHT SO KEEP AN
EYE TO THE SKY AND BE PREPARED TO MOVE TO A SAFE SHELTER IF
NECESSARY.

GOEHRING
Special weather statement, Jul 2, 7:41 PM CDT, 1 hour 2 minutes before
ILZ004-IAZ078-088-089-099-030130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
741 PM CDT FRI JUL 2 1993

...THUNDERSTORMS ACROSS NORTHERN CLINTON COUNTY IOWA...

INTENSE THUNDERSTORMS WERE ON THE CEADAR/JONES COUNTY LINE AT 725 PM
AND JUST MOVING INTO NORTHWESTERN CLINTON COUNTY ALL IN IOWA.
STORMS WERE MOVING EAST AT 25 MILES AN HOUR.  A JONES COUNTY SHERIFF
REPORTED ALOT OF HEAVY RAIN AND LIGHTNING WITH THIS STORM.

AT THEIR CURRENT SPEED AND DIRECTION THE STORMS SHOULD MOVE JUST
TO THE NORTH OF CLINTON.  HOWEVER...THUNDERSTORMS MAY DEVELOP TO
THE SOUTH OF THESE STORMS AND MOVE OVER CLINTON BY 830 PM.  PEOPLE
ATTENDING THE RIVERBOAT DAYS IN CLINTON IOWA SHOULD BE ON THE LOOK
OUT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND BE PREPARED TO MOVE
TO A SHELTER IF THESE STORMS APPROACH.  STONG GUSTY WINDS ARE ALSO
POSSIBLE WITH THESE STORMS.
.
MORE STORMS WERE ACROSS IOWA COUNTY IN IOWA THEY WERE MOVING VERY
SLOWLY TO THE EAST/SOUTHEAST AT AROUND 15 MILES AN HOUR.  STORMS
WILL BE IN THE TWO STATE REGION FOR MOST OF THE NIGHT SO KEEP AN
EYE TO THE SKY AND BE PREPARED TO MOVE TO A SAFE SHELTER IF
NECESSARY.

GOEHRING

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 8:08 PM CDTSevere Thunderstorm WarningDVNJackson37 min

Nearby

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