Alert archive / Illinois / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 146, NWS St. Louis, MO

July 31, 1993Jefferson County, Perry County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 31, 1993, 6:46 PM CDT for Jefferson County, Perry County, Illinois. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Jul 31, 1993, 6:46 PM CDT (23:46 UTC)
Expired
Jul 31, 1993, 7:30 PM CDT
In force
44 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Jefferson County, IL, Perry County, IL

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 12:00Z, 11.8 hours before the alert went out and 131 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, Paducah/Barkley, KY at 12:00Z on 1993-07-31Temperature 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, Paducah/Barkley, KY at 12:00Z on 1993-07-31The 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1134 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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, Jul 31, 4:15 PM CDT, 2 hours 31 minutes before
MOZ012-312330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
415 PM CDT SAT JUL 31 1993

...STRONG WINDS ARE HEADING TOWARDS ST LOUIS...

A LINE OF STRONG TO SEVERE THUNDERSTORMS WAS MOVING OUT OF NORTHEAST
MISSOURI AND TOWARDS ST LOUIS THIS AFTERNOON.  THESE STORMS HAVE
PRODUCED WIND DAMAGE AND GUSTS TO 60 MILES AN HOUR OVER AREAS
NORTHWEST OF ST LOUIS.

AS THESE STORMS MOVE SOUTHEAST...PEOPLE IN THE ST LOUIS AREA AND
ESPECIALLY PEOPLE WORKING AROUND THE RIVER FLOODING SHOULD PREPARE
FOR POSSIBLE SEVERE WEATHER AND STRONG WIND.  THESE STORMS SHOULD
ARRIVE IN THE AT LOUIS METRO AREA BETWEEN 530 AND 630 PM.

ALL PEOPLE ON BOATS OR LEVEES HELPING WITH FLOOD PROBLEMS SHOULD
BE ADVISED OF THESE APPROACHING STORMS AND BE READY TO FIND SHELTER.

SHEA
Special weather statement, Jul 31, 4:17 PM CDT, 2 hours 29 minutes before
MOZ012-312330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
415 PM CDT SAT JUL 31 1993

...STRONG WINDS ARE HEADING TOWARDS ST LOUIS...

A LINE OF STRONG TO SEVERE THUNDERSTORMS WAS MOVING OUT OF NORTHEAST
MISSOURI AND TOWARDS ST LOUIS THIS AFTERNOON.  THESE STORMS HAVE
PRODUCED WIND DAMAGE AND GUSTS TO 60 MILES AN HOUR OVER AREAS
NORTHWEST OF ST LOUIS.

AS THESE STORMS MOVE SOUTHEAST...PEOPLE IN THE ST LOUIS AREA AND
ESPECIALLY PEOPLE WORKING AROUND THE RIVER FLOODING SHOULD PREPARE
FOR POSSIBLE SEVERE WEATHER AND STRONG WIND.  THESE STORMS SHOULD
ARRIVE IN THE AT LOUIS METRO AREA BETWEEN 530 AND 630 PM.

ALL PEOPLE ON BOATS OR LEVEES HELPING WITH FLOOD PROBLEMS SHOULD
BE ADVISED OF THESE APPROACHING STORMS AND BE READY TO FIND SHELTER.

SHEA
Special weather statement, Jul 31, 5:43 PM CDT, 1 hour 3 minutes before
MOZ012-010500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
543 PM CDT SAT JUL 31 1993

...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MOST OF SOUTHEAST
   MISSOURI...
...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM FOR
   PARTS OF NORTHWEST MISSOURI...
...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM FOR MUCH
   OF NORTHEST AND CENTRAL MISSOURI...

A LINE OF SEVERE THUNDERSTORMS THAT HAS MOVED INTO EAST CENTRAL
MISSOURI IS EXPECTED TO CONTINUE MOVING SOUTHEAST AND SEVERE
THUNDERSTORMS WILL BE POSSIBLE OVER MUCH OF SOUTHEAST MISSOURI THIS
EVENING.

TUCKER
Special weather statement, Jul 31, 5:51 PM CDT, 55 minutes before
MOZ012-010500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
543 PM CDT SAT JUL 31 1993

...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MOST OF SOUTHEAST
   MISSOURI...
...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM FOR
   PARTS OF NORTHWEST MISSOURI...
...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM FOR MUCH
   OF NORTHEST AND CENTRAL MISSOURI...

A LINE OF SEVERE THUNDERSTORMS THAT HAS MOVED INTO EAST CENTRAL
MISSOURI IS EXPECTED TO CONTINUE MOVING SOUTHEAST AND SEVERE
THUNDERSTORMS WILL BE POSSIBLE OVER MUCH OF SOUTHEAST MISSOURI THIS
EVENING.

TUCKER
Special weather statement, Jul 31, 6:35 PM CDT, 11 minutes before
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Special weather statement, Jul 31, 6:36 PM CDT, 10 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 30, 10:41 PM CDTFlash Flood WarningLSXSaint Louis3 hr
Jul 31, 3:06 PM CDTSevere Thunderstorm WarningLSXMonroe, Shelby54 min
Jul 31, 4:02 PM CDTSevere Thunderstorm WarningLSXRalls43 min
Jul 31, 4:08 PM CDTSevere Thunderstorm WarningLSXAudrain37 min
Jul 31, 4:14 PM CDTSevere Thunderstorm WarningLSXPike46 min
Jul 31, 4:31 PM CDTSevere Thunderstorm WarningLSXLincoln44 min
Jul 31, 5:02 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Warren43 min
Jul 31, 5:15 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis45 min
Jul 31, 5:15 PM CDTSevere Thunderstorm WarningLSXFranklin45 min
Jul 31, 5:20 PM CDTTornado WarningLSXSaint Charles, Saint Louis40 min
Jul 31, 5:32 PM CDTTornado WarningLSXCity of Saint Louis28 min
Jul 31, 5:37 PM CDTFlash Flood WarningLSXSaint Louis, City of Saint Louis2 hr
Jul 31, 5:53 PM CDTSevere Thunderstorm WarningLSXJefferson52 min
Jul 31, 6:30 PM CDTSevere Thunderstorm WarningLSXWashington45 min
Jul 31, 4:47 PM CDTSevere Thunderstorm WarningLSXGreene43 min
Jul 31, 5:02 PM CDTSevere Thunderstorm WarningLSXJersey43 min
Jul 31, 5:40 PM CDTSevere Thunderstorm WarningLSXBond, Clinton, Fayette, Saint Clair50 min
Jul 31, 5:56 PM CDTTornado WarningLSXMadison, Saint Clair34 min
Jul 31, 6:04 PM CDTSevere Thunderstorm WarningLSXMarion, Washington41 min
Jul 31, 6:13 PM CDTSevere Thunderstorm WarningLSXRandolph47 min

Nearby

Severe Thunderstorm Warnings in Illinois, 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.