Alert archive / Missouri / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 122, NWS St. Louis, MO

July 20, 1993Iron County, Washington County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 20, 1993, 5:40 PM CDT for Iron County, Washington County, Missouri. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1993, 5:40 PM CDT (22:40 UTC)
Expired
Jul 20, 1993, 6:45 PM CDT
In force
65 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Iron County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 22:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 12:00Z, 10.7 hours before the alert went out and 198 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 1993-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1217 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, Paducah/Barkley, KY at 12:00Z on 1993-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 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
1217 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
689 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
-32 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 20, 4:45 PM CDT, 55 minutes before
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Special weather statement, Jul 20, 5:10 PM CDT, 30 minutes before
MOZ010-011-014-202300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
510 PM CDT TUE JUL 20 1993

...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 900 PM CDT
FOR THE EAST AND SOUTH SECTIONS OF CENTRAL MISSOURI...

AT 505 PM CDT WEATHER RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY
SHOWERS OVER EAST AND SOUTH MISSOURI.  THE BAND WAS ABOUT 25 MILES WIDE
AND EAST OF A LINE EXTENDING FROM 55 MILES EAST OF COLUMBIA TO 55 MILES
SOUTHEAST OF COLUMBIA...AROUND SULLIVAN...TO JUST SOUTH OF FT. LEONARD
WOOD.  THE THUNDERSTORMS WERE MOVING TO THE EAST AND SOUTHEAST AROUND
25 MILES AN HOUR AND NO LONGER PRESENT A THREAT OF SEVERE WEATHER TO
CENTRAL MISSOURI.

NO SEVERE WEATHER WAS REPORTED OR INDICATED BY RADAR IN CENTRAL
MISSOURI DURING THE LAST HOUR.

LB/GS
Special weather statement, Jul 20, 5:10 PM CDT, 30 minutes before
MOZ010-011-014-202300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
510 PM CDT TUE JUL 20 1993

...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 900 PM CDT
FOR THE EAST AND SOUTH SECTIONS OF CENTRAL MISSOURI...

AT 505 PM CDT WEATHER RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY
SHOWERS OVER EAST AND SOUTH MISSOURI.  THE BAND WAS ABOUT 25 MILES WIDE
AND EAST OF A LINE EXTENDING FROM 55 MILES EAST OF COLUMBIA TO 55 MILES
SOUTHEAST OF COLUMBIA...AROUND SULLIVAN...TO JUST SOUTH OF FT. LEONARD
WOOD.  THE THUNDERSTORMS WERE MOVING TO THE EAST AND SOUTHEAST AROUND
25 MILES AN HOUR AND NO LONGER PRESENT A THREAT OF SEVERE WEATHER TO
CENTRAL MISSOURI.

NO SEVERE WEATHER WAS REPORTED OR INDICATED BY RADAR IN CENTRAL
MISSOURI DURING THE LAST HOUR.

LB/GS
Local storm report, Jul 20, 5:23 PM CDT, 17 minutes before
MOZ010-011-014-210000-

PRELIMINARY STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA MO
530 PM CDT TUE JUL 20 1993

TIME         COUNTY        REPORT
205 PM       BENTON       VERY HEAVY SHOWERS WITH WINDS GUSTING TO
                          50 MPH JUST NORTHWEST OF WARSAW.
245 PM       CAMDEN       WINDS GUSTING TO 57 MPH NEAR HWY FF NORTHWEST
                          OF CAMDENTON.
300 PM       CAMDEN       TREES DOWN AND HEAVY SHOWERS ON HIGHWAYS 5 AND
                          7 IN CLIMAX SPRINGS.
315 PM       CAMDEN       SIGNS AND TREES DOWN NEAR OSAGE BEACH.
320 PM       CAMDEN       TREES BLOWN DOWN ON MOBIL HOME NEAR OSAGE
                          BEACH.
355 PM       MONTGOMERY   TBREES DOWN IN DANVILLE.
400 PM       MONTGOMERY   MARBLE-SIZED HAIL 2 MILES SOUTHWEST OF
                          MONTGOMERY CITY.
LB
Local storm report, Jul 20, 5:30 PM CDT, 10 minutes before
MOZ010-011-014-210000-

PRELIMINARY STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA MO
530 PM CDT TUE JUL 20 1993

TIME         COUNTY        REPORT
205 PM       BENTON       VERY HEAVY SHOWERS WITH WINDS GUSTING TO
                          50 MPH JUST NORTHWEST OF WARSAW.
245 PM       CAMDEN       WINDS GUSTING TO 57 MPH NEAR HWY FF NORTHWEST
                          OF CAMDENTON.
300 PM       CAMDEN       TREES DOWN AND HEAVY SHOWERS ON HIGHWAYS 5 AND
                          7 IN CLIMAX SPRINGS.
315 PM       CAMDEN       SIGNS AND TREES DOWN NEAR OSAGE BEACH.
320 PM       CAMDEN       TREES BLOWN DOWN ON MOBIL HOME NEAR OSAGE
                          BEACH.
355 PM       MONTGOMERY   TREES DOWN IN DANVILLE.
400 PM       MONTGOMERY   MARBLE-SIZED HAIL 2 MILES SOUTHWEST OF
                          MONTGOMERY CITY.
LB
Local storm report, Jul 20, 5:40 PM CDT, 0 minutes before
MOZ010-011-014-210000-

PRELIMINARY STORM REPORT...CORRECTED TO ADD INFO.
NATIONAL WEATHER SERVICE COLUMBIA MO
540 PM CDT TUE JUL 20 1993

TIME         COUNTY        REPORT
205 PM       BENTON       VERY HEAVY SHOWERS WITH WINDS GUSTING TO
                          50 MPH JUST NORTHWEST OF WARSAW.
245 PM       CAMDEN       WINDS GUSTING TO 57 MPH NEAR HWY FF NORTHWEST
                          OF CAMDENTON.
300 PM       CAMDEN       TREES DOWN AND HEAVY SHOWERS ON HIGHWAYS 5 AND
                          7 IN CLIMAX SPRINGS.
315 PM       CAMDEN       SIGNS AND TREES DOWN NEAR OSAGE BEACH.
320 PM       CAMDEN       TREES BLOWN DOWN ON MOBIL HOME NEAR OSAGE
                          BEACH.
355 PM       MONTGOMERY   TREES DOWN IN DANVILLE.
400 PM       MONTGOMERY   MARBLE-SIZED HAIL 2 MILES SOUTHWEST OF
                          MONTGOMERY CITY.
245 PM       S. MILLER    NUMEROUS TREES DOWN...2 TO 3 FOOT DIAMETER
                          TREE FELL ON HOUSE IN IBERIA.  TIME IS
APPROXIMATE.

LB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 3:11 PM CDTSevere Thunderstorm WarningLSXRalls49 min
Jul 20, 3:26 PM CDTSevere Thunderstorm WarningLSXPike64 min
Jul 20, 4:08 PM CDTSevere Thunderstorm WarningLSXLincoln52 min
Jul 20, 4:18 PM CDTSevere Thunderstorm WarningLSXFranklin, Warren57 min
Jul 20, 4:41 PM CDTSevere Thunderstorm WarningLSXSaint Charles64 min
Jul 20, 5:07 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis53 min
Jul 20, 5:20 PM CDTSevere Thunderstorm WarningLSXJefferson55 min
Jul 20, 5:45 PM CDTFlash Flood WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis2 hr
Jul 20, 5:45 PM CDTFlash Flood WarningLSXCity of Saint Louis2 hr
Jul 20, 6:20 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois55 min
Jul 20, 5:57 PM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair63 min
Jul 20, 6:20 PM CDTSevere Thunderstorm WarningLSXRandolph55 min

Nearby

Severe Thunderstorm Warnings in Missouri, 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; radar from the NEXRAD Level II archive.