Alert archive / Missouri / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 35, NWS Kansas City, MO

April 20, 1999Saline County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 20, 1999, 11:43 PM CDT for Saline County, Missouri. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 20, 1999, 11:43 PM CDT (04:43 UTC)
Expired: Apr 21, 1999, 12:30 AM CDT
In force: 47 min
Issued by: NWS Kansas City, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 99 km from the middle of the area, began a volume at 04:45 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 20, 9:15 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 4.7 hours before the alert went out and 211 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: 1527 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1855 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 299 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 16.0

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.

NWS Kansas City, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 2:33 PM CDT, 9 hours 10 minutes earlier.

Area forecast discussion, Apr 20, 2:33 PM CDT, 9 hours 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
233 PM CDT TUE APR 20 1999

STG LO-LVL WARM ADVECTION RESULTED IN SHRA DVLPMENT ACROSS ERN
NE/WRN IA THIS MORNING WITH -RA STILL CONITNUING IN FAR NE CWA.
CRNT PLACEMENT OF SFC FRONT STRETCHING FROM SOUTHERN KS INTO
SOUTHERN MO. 50+ DEGREE DPTS REACHING AS FAR NORTH AS STJ.

PREFERRED MOST ASPECTS OF THE AVN MODEL SOLUTION FOR THIS FCST
PACKAGE. FOR THE OVERNIGHT...LLVL JET BEGINS TO CRANK IN THE VERY
SOUTHERN PART OF CWA...MOSTLY AFTER 06Z. SFC LI/S AND CAPE IN THE
RANGE FOR CONVECTION...AND MOISTURE ON ITS WAY. MOST CONVECTION
SHUD OCCUR NEAR AND NORTH OF WARM FRONT. WILL KEEP CHC POPS FOR
TONITE. TEMPS TONITE SHUD BE A GOOD 10 DEGREES WARMER THAN LAST
NITE...FWC GUID ON TRACK.

PCP EVENT SHOULD BE ONGOING FOR WED/DAY AHEAD OF WARM FRONT...WITH
NORTHERN CWA REFLECTING HIGHER POPS THAN SOUTHERN. TEMPS TRICKY AND
DEPENDS HOW MUCH SUN BREAKS THROUGH. 925MB TEMPS AROUND 70...SO
WILL TREND ON THE HIER SIDE OF GUID FOR SOUTHERN CWA. AS DAYTIME
HEATING AFFECTS AREAS BEHIND THE FRONT...AGAIN INGREDIENTS ALL IN
PLACE FOR TSTORMS WED NITE...SEE SWODY2. WILL RAISE POPS INTO
LIKELY CATEGORIES FOR ALL FOR WED NITE. IF ETA PORTION OF QPF IS
CORRECT...WILL SEE ANOTHER HEAVY RAIN EVENT FOR CWA.

WARM FRONT DOES NOT MOVE A WHOLE LOT THROUGH THURS AND WILL
CONTINUE CHC POPS THROUGH THEN. TEMPS LOOK TO REMAIN NEAR GUID
TEMPS...WITH GRADUAL COOLING THRU EXTNDED. SHRT WVS CONTINUE TO
MOVE THROUGH TROUGH THROUGH THE EXTNDED. WITH A BREAK EXPECTED ON
SUNDAY.

.EAX...
MO...NONE
KS...NONE

LVQ

In the hours before

Local storm report, Apr 20, 10:12 PM CDT, 1 hour 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1012 PM CDT TUE APR 20 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0949 PM    6 W CARROLLTON            MO    1.75 INCH HAIL
04/20/99   CARROLL

Local storm report, Apr 20, 10:48 PM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1048 PM CDT TUE APR 20 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1010 PM    GLASGOW                   MO    .88 INCH HAIL
04/20/99   HOWARD

1037 PM    1 W NORBORNE              MO    1 INCH HAIL
04/20/99   CARROLL

Local storm report, Apr 20, 10:48 PM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1048 PM CDT TUE APR 20 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1010 PM    GLASGOW                   MO    .88 INCH HAIL
04/20/99   HOWARD

1037 PM    1 W NORBORNE              MO    1 INCH HAIL
04/20/99   CARROLL

Local storm report, Apr 20, 11:17 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1117 PM CDT TUE APR 20 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1005 PM    KNOXVILLE                 MO    .88 INCH HAIL
04/20/99   RAY

1048 PM    WAVERLY                   MO    1 INCH HAIL
04/20/99   LAFAYETTE

1103 PM    SLATER                    MO    1.75 INCH HAIL
04/20/99   SALINE

Local storm report, Apr 20, 11:17 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1117 PM CDT TUE APR 20 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1005 PM    KNOXVILLE                 MO    .88 INCH HAIL
04/20/99   RAY

1048 PM    WAVERLY                   MO    1 INCH HAIL
04/20/99   LAFAYETTE

1103 PM    SLATER                    MO    1.75 INCH HAIL
04/20/99   SALINE

Special weather statement, Apr 20, 11:24 PM CDT, 19 minutes before

KSZ025-102-MOZ001>005-011>013-020-210600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1124 PM CDT TUE APR 20 1999

...SEVERE THUNDERSTORM WATCH NUMBER 162 HAS BEEN CANCELLED FOR PARTS
OF NORTHWEST MISSOURI...

THE SEVERE THUNDERSTORM WATCH FOR ATCHISON...NODAWAY...WORTH...
HARRISON...HOLT...ANDREW...GENTRY...DE KALB...AND BUCHANAN COUNTIES
IN MISSOURI AND ATCHISON AND DONIPHAN COUNTIES IN KANSAS HAS BEEN
CANCELLED. THE THREAT OF SEVERE WEATHER FOR THIS PART OF NORTHWEST
MISSOURI AND EXTREME NORTHEAST KANSAS HAS ENDED. SCATTERED
THUNDERSTORMS ARE STILL POSSIBLE TONIGHT BUT THEY SHOULD REMAIN
BELOW SEVERE LIMITS.

JULY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 9:20 PM CDT	Severe Thunderstorm Warning	EAX	Ray	40 min
Apr 20, 9:47 PM CDT	Severe Thunderstorm Warning	EAX	Carroll	58 min
Apr 20, 9:53 PM CDT	Severe Thunderstorm Warning	EAX	Howard	52 min
Apr 20, 9:59 PM CDT	Severe Thunderstorm Warning	EAX	Ray	46 min
Apr 20, 10:16 PM CDT	Severe Thunderstorm Warning	EAX	Lafayette	44 min
Apr 20, 10:45 PM CDT	Severe Thunderstorm Warning	EAX	Saline	60 min
Apr 20, 11:38 PM CDT	Flash Flood Warning	EAX	Saline	2 hr
Apr 21, 12:02 AM CDT	Severe Thunderstorm Warning	EAX	Chariton	43 min
Apr 21, 12:46 AM CDT	Severe Thunderstorm Warning	EAX	Carroll, Chariton, Livingston	44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1999 Every severe thunderstorm warning in 1999

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.