Alert archive / Missouri / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 284, NWS Kansas City, MO

August 20, 2010Cooper County, Howard County, Randolph County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Aug 20, 2010, 4:44 PM CDT for Cooper County, Howard County, Randolph County, Missouri. It was in force for 31 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
Aug 20, 2010, 4:44 PM CDT (21:44 UTC)
Expired
Aug 20, 2010, 5:15 PM CDT
In force
31 min
Issued by
NWS Kansas City, MO
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Cooper County, MO, Howard County, MO, Randolph County, MO

The radar

The Pleasant Hill radar (KEAX), 143 km from the middle of the area, began a volume at 21:46 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.

IssuedProductOfficeLasted
Aug 20, 1:58 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 9.7 hours before the alert went out and 257 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, Topeka, KS at 12:00Z on 2010-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1657 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, Topeka, KS at 12:00Z on 2010-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.19395878Sfc1 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
1657 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
1406 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Aug 20, 4:12 PM CDT, 32 minutes earlier.

Area forecast discussion, Aug 20, 4:12 PM CDT, 32 minutes before
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Hazardous weather outlook, Aug 20, 12:46 PM CDT, 3 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1246 PM CDT FRI AUG 20 2010

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-211800-
ATCHISON KS-MIAMI-LINN KS-DONIPHAN-LEAVENWORTH-WYANDOTTE-JOHNSON KS-
ATCHISON MO-NODAWAY-WORTH-GENTRY-HARRISON-MERCER-PUTNAM-SCHUYLER-
HOLT-ANDREW-DE KALB-DAVIESS-GRUNDY-SULLIVAN-ADAIR-BUCHANAN-CLINTON-
CALDWELL-LIVINGSTON-LINN MO-MACON-PLATTE-CLAY-RAY-CARROLL-CHARITON-
RANDOLPH-JACKSON-LAFAYETTE-SALINE-HOWARD-CASS-JOHNSON MO-PETTIS-
COOPER-BATES-HENRY-
1246 PM CDT FRI AUG 20 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL AND
WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A CHANCE OF SEVERE THUNDERSTORMS FROM THIS AFTERNOON THROUGH
LATE THIS EVENING ACROSS PORTIONS OF NORTHEASTERN KANSAS THROUGH WEST
CENTRAL MISSOURI AND INTO NORTHEAST AND CENTRAL MISSOURI.

ONGOING THUNDERSTORM ACTIVITY IN NORTHEAST KANSAS IS EXPECTED TO GAIN
STRENGTH THIS AFTERNOON AS IT MOVES INTO A MORE UNSTABLE AIRMASS
ACROSS PORTIONS OF NORTHWESTERN AND NORTHERN MISSOURI. ADDITIONAL
THUNDERSTORMS MAY DEVELOP ON THE SOUTHERN END OF THIS LINE AS IT
TRACKS TO THE EAST. THE PRIMARY HAZARDS WITH ANY OF THESE STORMS
WILL BE FROM DAMAGING WINDS...LARGE HAIL AND LOCALLY HEAVY RAINFALL.

THE THUNDERSTORMS MAY THEN GRADUALLY ORGANIZE INTO A LARGER SQUALL
LINE OR COMPLEX DURING THE EVENING HOURS...WITH DAMAGING WINDS AND
HEAVY RAINFALL POSSIBLE ACROSS THE CENTRAL AND EASTERN PORTIONS OF
MISSOURI. THUNDERSTORMS MAY TEMPORARILY STALL OVER SOME LOCATIONS OF
CENTRAL AND NORTHEAST MISSOURI THIS EVENING...WITH THE POTENTIAL FOR
LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON AND THIS EVENING.

CDB

In the hours before

Special weather statement, Aug 20, 3:06 PM CDT, 1 hour 38 minutes before
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Special weather statement, Aug 20, 3:11 PM CDT, 1 hour 33 minutes before
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Special weather statement, Aug 20, 3:38 PM CDT, 1 hour 6 minutes before
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Special weather statement, Aug 20, 4:02 PM CDT, 42 minutes before
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Local storm report, Aug 20, 4:05 PM CDT, 39 minutes before
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Special weather statement, Aug 20, 4:30 PM CDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 1:03 PM CDTSevere Thunderstorm WarningEAXBuchanan, Platte42 min
Aug 20, 1:16 PM CDTSevere Thunderstorm WarningEAXPlatte44 min
Aug 20, 1:38 PM CDTSevere Thunderstorm WarningEAXBuchanan, Caldwell, Clay, Clinton, Daviess, DeKalb and 2 more37 min
Aug 20, 1:45 PM CDTSevere Thunderstorm WarningEAXClay, Jackson, Platte, Ray35 min
Aug 20, 2:06 PM CDTTornado WarningEAXClay, Clinton, Ray24 min
Aug 20, 2:16 PM CDTSevere Thunderstorm WarningEAXCaldwell, Daviess, DeKalb, Livingston29 min
Aug 20, 2:27 PM CDTSevere Thunderstorm WarningEAXCaldwell, Carroll, Lafayette, Ray33 min
Aug 20, 2:37 PM CDTSpecial Weather StatementEAXDaviess, Grundy38 min
Aug 20, 2:50 PM CDTSpecial Weather StatementEAXRandolph40 min
Aug 20, 2:59 PM CDTSpecial Weather StatementEAXClay46 min
Aug 20, 3:06 PM CDTSpecial Weather StatementEAXCarroll, Ray39 min
Aug 20, 3:11 PM CDTSpecial Weather StatementEAXMercer49 min
Aug 20, 3:38 PM CDTSpecial Weather StatementEAXChariton, Linn, Sullivan37 min
Aug 20, 4:02 PM CDTSpecial Weather StatementEAXAdair, Macon, Randolph, Schuyler43 min
Aug 20, 4:30 PM CDTSpecial Weather StatementEAXMacon, Randolph, Schuyler30 min
Aug 20, 4:50 PM CDTSpecial Weather StatementEAXCaldwell, Livingston25 min
Aug 20, 5:15 PM CDTSpecial Weather StatementEAXCaldwell, Livingston45 min
Aug 20, 5:25 PM CDTRiver Flood WarningEAXAndrew, Buchanan16 hr
Aug 20, 5:44 PM CDTSpecial Weather StatementEAXJackson31 min
Aug 20, 6:19 PM CDTSpecial Weather StatementEAXRay26 min
Aug 20, 6:49 PM CDTFlash Flood WarningEAXRandolph6 hr
Aug 20, 4:42 PM CDTSevere Thunderstorm WarningEAXLeavenworth33 min
Aug 20, 5:12 PM CDTAreal Flood AdvisoryEAXDoniphan4 hr
Aug 20, 5:19 PM CDTSpecial Weather StatementEAXWyandotte41 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2010Every severe thunderstorm warning in 2010

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.