Alert archive / Illinois / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 42, NWS St. Louis, MO

April 27, 1994Monroe County, Saint Clair County, Illinois; Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 27, 1994, 12:33 AM CDT for Monroe County, Saint Clair County, Illinois; Saint Louis County, City of Saint Louis, Missouri. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Apr 27, 1994, 12:33 AM CDT (05:33 UTC)
Expired
Apr 27, 1994, 1:15 AM CDT
In force
42 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Monroe County, IL, Saint Clair County, IL, City of Saint Louis, MO, Saint Louis County, MO

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 5.6 hours before the alert went out and 206 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 00:00Z on 1994-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2999 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1994-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 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
2999 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1036 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
1.8
Supercell composite
10.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 270535
SVRSTL
ILC133-163-MOC189-510-270615-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1233 AM CDT WED APR 27 1994
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  115 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ILLINOIS
 
   ...NORTHERN MONROE COUNTY...NORTHERN ST CLAIR COUNTY
 
 
IN EAST CENTRAL MISSOURI
 
   ...SOUTHERN ST LOUIS COUNTY
 
  AND THE INDEPENDENT CITY OF
 
   ...ST LOUIS CITY
 
AT 1235 AM...WEATHER SERVICE RADAR WAS DETECTING SEVERE THUNDERSTORMS
OVER NORTHERN JEFFERSON COUNTY...15 TO 25 MILES SOUTH SOUTHWEST OF ST.
LOUIS. THE STORMS WERE MOVING NORTHEAST AT 35 MPH. THE STORMS WILL MOVE
INTO ST. LOUIS...COLUMBIA... AND CENTERVILLE.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WAhRNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
GKS/TRUETT

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, Apr 26, 7:04 PM CDT, 5 hours 29 minutes before
MOZ058-070>076-082>087-097>100-106>115-270205-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
704 PM CDT TUE APR 26 1994

...TORNADO WATCH IN EFFECT FOR SOUTHEAST MISSOURI EXCLUDING THE
BOOTHEEL UNTIL MIDNIGHT...

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR MUCH OF
SOUTHEAST MISSOURI EXCLUDING THE BOOTHEEL UNTIL MIDNIGHT.  LARGER
CITIES INCLUDED IN THE WATCH ARE FARMINGTON...WEST PLAINS...AND
POPLAR BLUFF.

REMEMBER A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE
DEVELOPMENT OF SEVERE THUNDERSTORMS AND TORNADOES IN AND CLOSE TO THE
WATCH AREA.

RESIDENTS OF SOUTHEAST MISSOURI SHOULD REMAIN ALERT AND STAY TUNED TO
LOCAL MEDIA OUTLETS.

 IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IN A HOME OR
BUSINESS IS AN INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE.  AVOID
WINDOWS.

GLASS
Special weather statement, Apr 26, 7:42 PM CDT, 4 hours 51 minutes before
MOZ062-065-061-063-064-ILZ100-102-101-270145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
742 PM CDT TUE APR 26 1994

...STRONG THUNDERSTORMS DEVELOPING ACROSS THE BI-STATE AREA...

AT 740 PM...WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM OVER
FRANKLIN COUNTY MISSOURI.  THE LATEST WEATHER DATA SUGGESTS THAT STRONG
THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS EASTERN MISSOURI AND
SOUTHWEST ILLINOIS...INCLUDING THE ST LOUIS METRO AREA...BETWEEN NOW AND
9 PM THIS EVENING.

REMEMBER...A TORNADO WATCH IS IN EFFECT FOR MUCH OF EAST CENTRAL
MISSOURI AND SOUTHWEST PORTIONS OF ILLINOIS UNTIL MIDNIGHT.  PEOPLE
THROUGHOUT THE AREA SHOULD REMAIN ALERT TO THE THREAT OF ~SEVERE
WEATHER....AND MONITOR NOAA WEATHER RADIO...OR LOCAL RADIO AND TV
STATIONS...FOR FURTHER WEATHER UPDATES THROUGHOUT THE EVENING.

TRUETT
Special weather statement, Apr 26, 8:16 PM CDT, 4 hours 17 minutes before
MOZ001>115-270200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
815 PM CDT TUE APR 26 1994

...THE TORNADO WATCH FOR PARTS OF SOUTHWEST MISSOURI IS NO LONGER
IN EFFECT...

THE TORNADO WATCH FOR SOUTHWEST MISSOURI IS NO LONGER IN EFFECT.  THE
SEVERE THUNDERSTORMS HAVE MOVED INTO SOUTH CENTRAL AND CENTRAL MISSOURI
...ENDING THE THREAT OF LARGE HAIL AND DAMAGING WINDS OVER SOUTHWEST
MISSOURI.

THE FOLLOWING COUNTIES ARE CLEARED FROM THE WATCH...

BARTON             JASPER           NEWTON              MCDONALD
LAWRENCE           BARRY            STONE

THE CITIES OF JOPLIN AND NEOSHO ARE ALSO CLEARED FROM THE WATCH.

TRUETT
Local storm report, Apr 26, 10:16 PM CDT, 2 hours 17 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA MO
1015 PM CDT TUE APR 27 1994

...PRELIMINARY STORM REPORTS...ALL TIMES LOCAL PM

TIME      COUNTY             REPORT
710       PULASKI        TORRENTIAL RAINS//PEA SIZED HAIL.
730       CAMDEN         WIND GUSTS ESTIMATED 85 MPH//POLICE JEEP LIFTED
                         OFF THE GROUND BY WIND//ROOF DESTROYED ON A NEW
                         2 STORY BLDG//AIRCRAFT HANGAR DESTROYED//HOUSE
                         BOAT FLIPPED IN LAKE//LARGE TREES...1 TO 11/2
                         FEET IN DIAMETER DOWN//LARGE BOATS DESTROYED IN
                         HARBOUR//ANOTHER REPORT OF 65 MPH WINDS.
737       MORGAN         60 PLUS MPH WINDS//TORRENTIAL RAINS//LARGE TREES
                         DOWN.
740       CAMDEN         ANTENNA TORN OFF COURT HOUSE//LARGE TREES DOWN
                         AT HIWAYS591/589//LARGE TREES DOWN JCT.99//3
                         MILES WEST OF CAMDENTON AT HH BLDG DESTROYED//
                         POWER OUT AT GRENVIEW AND JCT 5/17.
753        MILLER           TRAILER DESTROYED NEAR BRUMLEY//TREES
                              AND PHONE LINES DOWN//POWER OUT THERE.
805        GASCONADE        TREES DOWN//LARGE HAIL TO 11/2 INCH SOUTH
                            OF OWENSVILLE.
815        BENTON           3/4 INCH HAIL AND GROWING AROUND WARSAW.
817        COLE             LARGE TREES DOWN AND DAMAGE TO SIGNS AND
                            ROOFS IN JEFFERSON CITY.
820        S. CALLAWAY      TORNADO SIGHTED BY OFF DUTY POLICEMAN
                            MOVING TO NORTHEAST ON CO. ROAD AA.
830        BOONE            50 TO 60 MPH WINDS 11/2 MILES SOUTH OF
                RN DESTROYED//LARGE TREES AND POWER LINES
                            DOWN IN FULTON//WXL-45 NOAA WEA. RADIO OUT
                            OF BUSINESS.
845        MONTGOMERY       LARGE TREES AND POWER LINES DOWN IN
                            MONTGOMERY CITY.

LB/AP/AL
Special weather statement, Apr 26, 11:07 PM CDT, 1 hour 26 minutes before
MOZALL-270800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1100 PM CDT TUE APR 26 1994

...A NEW TORNADO WATCH HAS BEEN ISSUED FOR MUCH OF SOUTHERN AND
   EAST CENTRAL MISSOURI UNTIL 300 AM...

...THE TORNADO WATCH FOR EAST CENTRAL MISSOURI AND SOUTHWEST
   ILLINOIS CONTINUES IN EFFECT UNTIL MIDNIGHT...

AT 1100 PM...THE NATIONAL WEATHER SERVICE HAS ISSUED A NEW
TORNADO WATCH FOR MUCH OF SOUTHERN AND EAST CENTRAL MISSOURI
IN EFFECT UNTIL 300 AM.  THIS INCLUDES THE CITIES OF CAMDENTON...
FARMINGTON...CAPE GIRARDEAU...JEFFERSON CITY...LEBANON...ROLLA...
ST. CHARLES...ST. LOUIS AND UNION.  TORNADO WATCH NUMBER 131 FOR
EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS CONTINUES IN EFFECT
UNTIL MIDNIGHT.  THE ONLY COUNTY IN MISSOURI THIS WATCH INCLUDES IS
LINCOLN COUNTY.

AT 1100 PM...RADAR CONTINUED TO INDICATE THUNDERSTORMS EXTENDING
FROM NEAR VICHY THROUGH THE ST. LOUIS METRO AREA INTO WESTERN
ILLINOIS.

A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADOES AND
SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.  PERSONS IN THESE
AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS
AND LISTEN TO NOAA WEATHER RADIO OR LOCAL MEDIA SOURCxES FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.

GKS
Special weather statement, Apr 27, 12:10 AM CDT, 23 minutes before
MOZ052-060>065-072>076-ILZ098>102-270800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1210 AM CDT WED APR 27 1994

...A TORNADO WATCH IS IN EFFECT FOR PARTS OF SOUTHERN AND EAST CENTRAL
MISSOURI UNTIL 300 AM...
...THE TORNADO WATCH FOR OTHER AREAS OF EAST CENTRAL MISSOURI AND INTO
SOUTHWEST ILLINOIS HAS EXPIRED...

TORNADO WATCH #131 IS NO LONGER IN EFFECT FOR PARTS OF EAST CENTRAL
MISSOURI AND SOUTWEST ILLINOIS.  THE COUNTIES CLOSE TO ST LOUIS THAT
ARE NO LONGER INCLUDED IN A TORNADO WATCH INCLUDE LINCOLN COUNTY IN
MISSOURI AND CALHOUN AND JERSEY COUNTIES IN ILLINOIS.

ALL OTHER COUNTIES AROUND THE ST LOUIS AREA REMAIN IN A TORNADO WATCH
UNTIL 300 AM.  IF STORMS MOVE I.NTO YOUR AREA...REMAIN INDOORS AND
LISTEN FOR POSSIBLE WARNINGS.

SHEA

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 8:07 PM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey68 min
Apr 26, 8:55 PM CDTSevere Thunderstorm WarningLSXMadison65 min
Apr 26, 9:12 PM CDTTornado WarningLSXMacoupin, Montgomery33 min
Apr 26, 9:27 PM CDTTornado WarningLSXMonroe48 min
Apr 26, 9:43 PM CDTSevere Thunderstorm WarningLSXSaint Clair47 min
Apr 26, 9:54 PM CDTSevere Thunderstorm WarningLSXRandolph66 min
Apr 26, 10:14 PM CDTSevere Thunderstorm WarningLSXClinton, Washington61 min
Apr 26, 10:30 PM CDTSevere Thunderstorm WarningLSXBond45 min
Apr 26, 10:39 PM CDTSevere Thunderstorm WarningLSXFayette51 min
Apr 26, 10:47 PM CDTSevere Thunderstorm WarningLSXJefferson, Marion58 min
Apr 27, 1:12 AM CDTSevere Thunderstorm WarningLSXClinton, Saint Clair48 min
Apr 27, 2:40 AM CDTSevere Thunderstorm WarningLSXRandolph50 min
Apr 27, 3:02 AM CDTSevere Thunderstorm WarningLSXPerry43 min
Apr 27, 3:20 AM CDTTornado WarningLSXPerry27 min
Apr 27, 6:58 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair47 min
Apr 26, 7:08 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds67 min
Apr 26, 7:17 PM CDTSevere Thunderstorm WarningLSXFranklin58 min
Apr 26, 7:27 PM CDTSevere Thunderstorm WarningLSXPhelps63 min
Apr 26, 7:32 PM CDTSevere Thunderstorm WarningLSXCrawford, Dent43 min
Apr 26, 7:46 PM CDTSevere Thunderstorm WarningLSXWashington59 min
Apr 26, 7:47 PM CDTSevere Thunderstorm WarningLSXSaint Charles43 min
Apr 26, 8:00 PM CDTSevere Thunderstorm WarningLSXSaint Louis60 min
Apr 26, 8:15 PM CDTSevere Thunderstorm WarningLSXFranklin, Warren60 min
Apr 26, 8:29 PM CDTSevere Thunderstorm WarningLSXSaint Louis46 min
Apr 26, 8:34 PM CDTSevere Thunderstorm WarningLSXSaint Charles56 min
Apr 26, 8:39 PM CDTSevere Thunderstorm WarningLSXCrawford66 min
Apr 26, 8:47 PM CDTTornado WarningLSXCrawford43 min
Apr 26, 8:52 PM CDTSevere Thunderstorm WarningLSXWashington68 min
Apr 26, 9:16 PM CDTSevere Thunderstorm WarningLSXJefferson59 min
Apr 26, 9:21 PM CDTSevere Thunderstorm WarningLSXLincoln, Pike54 min
Apr 26, 9:23 PM CDTTornado WarningLSXJefferson52 min
Apr 26, 9:35 PM CDTSevere Thunderstorm WarningLSXIron, Saint Francois55 min
Apr 26, 9:46 PM CDTSevere Thunderstorm WarningLSXSaint Louis59 min
Apr 27, 12:12 AM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson48 min
Apr 27, 2:00 AM CDTSevere Thunderstorm WarningLSXIron, Saint Francois, Washington45 min
Apr 27, 4:54 PM CDTSevere Thunderstorm WarningLSXPike36 min
Apr 27, 5:07 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds68 min
Apr 27, 6:02 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Francois43 min
Apr 27, 6:30 PM CDTTornado WarningLSXIron, Reynolds60 min
Apr 27, 6:38 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve48 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1994Severe Thunderstorm Warnings in Missouri, 1994Every severe thunderstorm warning in 1994

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.