Alert archive / Missouri / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 156, NWS Kansas City, MO

July 21, 1993Pettis County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 21, 1993, 9:58 PM CDT for Pettis County, Missouri. It was in force for 32 min.

The area

The counties it named.

The facts

Issued: Jul 21, 1993, 9:58 PM CDT (02:58 UTC)
Expired: Jul 21, 1993, 10:30 PM CDT
In force: 32 min
Issued by: NWS Kansas City, MO
Area: Whole counties

County Pettis County, MO

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 3.0 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-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: 105 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 943 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 198 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 21, 7:30 PM CDT, 2 hours 28 minutes before

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Special weather statement, Jul 21, 7:36 PM CDT, 2 hours 22 minutes before

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Special weather statement, Jul 21, 8:30 PM CDT, 1 hour 28 minutes before

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Special weather statement, Jul 21, 8:38 PM CDT, 1 hour 20 minutes before

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Special weather statement, Jul 21, 9:40 PM CDT, 18 minutes before

MOZ001-004-005-008-009-013-KSZ016-220330-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE KANSAS CITY MISSOURI
940 PM CDT WED JUL 21 1993

...A FLASH FLOOD WATCH IS EFFECT TONIGHT FOR EAST KANSAS AND NORTHWEST
MISSOURI...

AT 930 PM...SCATTERED THUNDERSTORMS SOME WITH VERY HEAVY RAIN WERE IN
EAST KANSAS AND WESTERN MISSOURI.

THE THUNDERSTORMS WERE LOCATED ALONG A LINE FROM 20 MILES SOUTHWEST OF
ST JOSEPH MISSOURI...TO TOPEKA KANSAS SOUTH TO EMPORIA.  THE LINE OF
THUNDERSTORMS WILL MOVE INTO LEAVENWORTH COUNTY BY 945PM AND EAST INTO
KANSAS CITY BY 10PM.  HEAVY RAINS AND FLOODING ARE POSSIBLE.

ANOTHER LINE OF THUNDERSTORMS WAS FROM WARRENSBURG MISSOURI SOUTH TO
CLINTON.  STRONG GUSTY WINDS...HEAVY RAIN AND DANGEROUS LIGHTNING ARE
ASSOCIATED WITH THESE STORMS.  ALL THE STORMS WERE MOVING EAST-NORTHEAST
AT 25 MILES AN HOUR.    KETCHAM

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Special weather statement, Jul 21, 9:41 PM CDT, 17 minutes before

MOZ001-004-005-008-009-013-KSZ016-220330-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE KANSAS CITY MISSOURI
940 PM CDT WED JUL 21 1993

...A FLASH FLOOD WATCH IS EFFECT TONIGHT FOR EAST KANSAS AND NORTHWEST
MISSOURI...

AT 930 PM...SCATTERED THUNDERSTORMS SOME WITH VERY HEAVY RAIN WERE IN
EAST KANSAS AND WESTERN MISSOURI.

THE THUNDERSTORMS WERE LOCATED ALONG A LINE FROM 20 MILES SOUTHWEST OF
ST JOSEPH MISSOURI...TO TOPEKA KANSAS SOUTH TO EMPORIA.  THE LINE OF
THUNDERSTORMS WILL MOVE INTO LEAVENWORTH COUNTY BY 945PM AND EAST INTO
KANSAS CITY BY 10PM.  HEAVY RAINS AND FLOODING ARE POSSIBLE.

ANOTHER LINE OF THUNDERSTORMS WAS FROM WARRENSBURG MISSOURI SOUTH TO
CLINTHON.  STRONG GUSTY WINDS...HEAVY RAIN AND DANGEROUS LIGHTNING ARE
ASSOCIATED WITH THESE STORMS.  ALL THE STORMS WERE MOVING EAST-NORTHEAST
AT 25 MILES AN HOUR.    KETCHAM

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 10:29 PM CDT	Flash Flood Warning	EAX	Pettis	2 hr
Jul 22, 3:00 AM CDT	Flash Flood Warning	EAX	Bates	3 hr
Jul 22, 6:04 AM CDT	Flash Flood Warning	EAX	Bates	3 hr
Jul 22, 6:30 AM CDT	Flash Flood Warning	EAX	Atchison, Holt, Nodaway	3 hr
Jul 22, 9:15 AM CDT	Flash Flood Warning	EAX	Gentry	2 hr
Jul 21, 10:45 PM CDT	Flash Flood Warning	EAX	Miami	3 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 1993 Every 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.