Alert archive / Missouri / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 42, NWS Kansas City, MO

April 23, 2010Macon County, Randolph County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 23, 2010, 6:58 PM CDT for Macon County, Randolph County, Missouri. It was in force for 32 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 23, 2010, 6:58 PM CDT (23:58 UTC)
Expired
Apr 23, 2010, 7:30 PM CDT
In force
32 min
Issued by
NWS Kansas City, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Macon County, MO, Randolph County, MO

The radar

The Pleasant Hill radar (KEAX), 175 km from the middle of the area, began a volume at 00:00 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

Springfield, MO (KSGF), launched 12:00Z, 12.0 hours before the alert went out and 324 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, Springfield, MO at 12:00Z on 2010-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 144 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, Springfield, MO at 12:00Z on 2010-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 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
144 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
855 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
139 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 Apr 23, 6:25 PM CDT, 33 minutes earlier.

Area forecast discussion, Apr 23, 6:25 PM CDT, 33 minutes before
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Hazardous weather outlook, Apr 23, 12:57 PM CDT, 6 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1257 PM CDT FRI APR 23 2010

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-241800-
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-
1257 PM CDT FRI APR 23 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

A COMPLEX AND POWERFUL STORM SYSTEM WILL CONTINUE TO PUSH TOWARDS THE
LOWER MISSOURI RIVER VALLEY REGION THIS AFTERNOON AND EVENING.
SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP BY MIDDLE TO LATE
AFTERNOON ALONG A DRY LINE SITUATED IN EAST CENTRAL KANSAS...WITH
THUNDERSTORMS LIKELY FIRST DEVELOPING IN A VERY WARM MOIST CORRIDOR
ALONG THE KANSAS/NEBRASKA BORDER AND SPREADING SOUTH ALONG THE DRY
LINE THROUGH EASTERN KANSAS. THESE STORMS WILL BEGIN TO RAPIDLY LIFT
NORTHWARD TOWARDS A SURFACE WARM FRONT ALONG SOUTHEAST
NEBRASKA...NORTHERN MISSOURI AND SOUTHERN IOWA...WITH STORMS LIKELY
IMPACTING NORTHEAST KANSAS AND NORTHWEST MISSOURI BY LATE AFTERNOON
BUT MORE LIKELY IN THE EVENING. ADDITIONAL THUNDERSTORMS MAY LIFT
NORTHEAST OUT OF ARKANSAS AND SOUTHERN MISSOURI IMPACTING EASTERN
PORTIONS OF THE OUTLOOK AREA BY LATE AFTERNOON.

GIVEN STRONG INSTABILITY AND SHEAR IN THE ATMOSPHERE...ANY STORM
WHICH DEVELOPS WILL HAVE THE POTENTIAL TO LARGE HAIL...DAMAGING
WINDS AND LOCALIZED FLOODING...BUT MAY ALSO BE CAPABLE OF PRODUCING
ISOLATED TORNADOES. WHILE STILL LOW...THE HIGHEST PROBABILITY FOR
TORNADIC ACTIVITY WILL BE IN AREAS FROM KANSAS CITY...TO TOPEKA AND
NORTHWEST TO ST. JOSEPH...TARKIO AND ALBANY. THE THUNDERSTORMS WILL
CONTINUE TO PROGRESS EASTWARD THROUGH THE REST OF THE OUTLOOK AREA
DURING THE NIGHT. HOWEVER...THE SEVERE THREAT WILL GRADUALLY DIMINISH
BY LATE EVENING AS THE STORMS APPROACH A KIRKSVILLE TO MOBERLY LINE
SHORTLY AFTER MIDNIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE UPPER LOW RESPONSIBLE FOR TODAY'S THUNDERSTORMS WILL PASS OVERHEAD
THE OUTLOOK AREA ON SATURDAY. AT THIS TIME...IT DOES APPEAR THAT
SUFFICIENT INSTABILITY AND LITTLE INHIBITION WILL LEAD TO THE
DEVELOPMENT OF THUNDERSTORMS AS EARLY AS NOON ON SATURDAY. PRIMARY
THREATS WILL BE LARGE HAIL AND LOCALLY HEAVY RAINFALL. WHILE
PROBABILITIES REMAIN VERY LOW...AN ISOLATED TORNADO MAY ALSO BE
POSSIBLE NEAR EXISTING BOUNDARIES. THE THREAT OF THUNDERSTORMS SHOULD
DIMINISH BY SUNSET.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE LIKELY ACROSS EASTERN KANSAS...WESTERN
MISSOURI BY LATE AFTERNOON...AND FURTHER EAST INTO MISSOURI IN THE
EVENING. SPOTTER ACTIVATION WILL ALSO BE LIKELY ON SATURDAY.

DUX

In the hours before

Special weather statement, Apr 23, 6:48 PM CDT, 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
648 PM CDT FRI APR 23 2010

MOZ039-045-240030-
PETTIS MO-SALINE MO-
648 PM CDT FRI APR 23 2010

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN SALINE AND NORTHERN
PETTIS COUNTIES UNTIL 730 PM CDT...

AT 644 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR HOUSTONIA...OR 9 MILES SOUTHEAST OF SWEET
SPRINGS...MOVING NORTHEAST AT 45 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  MARSHALL...
  SLATER...
  GILLIAM...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

CDB
Local storm report, Apr 23, 6:49 PM CDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
649 PM CDT FRI APR 23 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0642 PM     HAIL             MOBERLY                 39.42N 92.44W
04/23/2010  M0.75 INCH       RANDOLPH           MO   TRAINED SPOTTER

            DIME SIZE HAIL FELL..WINDS APROX 35-40 MPH. STORM HAS
            DIED DOWN SINCE HAIL FELL.

&&

KBRONIS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 8:19 PM CDTRiver Flood WarningEAXBates4 days
Apr 22, 8:34 PM CDTRiver Flood WarningEAXCass, Henry, Johnson3 days
Apr 22, 8:34 PM CDTRiver Flood WarningEAXBates, Cass, Henry3 days
Apr 22, 10:01 PM CDTFlood WatchEAXBates, Cass, Henry, Jackson, Johnson, Lafayette15 hr
Apr 23, 3:35 AM CDTRiver Flood WarningEAXJohnson, Pettis3 days
Apr 23, 4:20 AM CDTAreal Flood AdvisoryEAXBates, Cass, Henry, Johnson3 hr
Apr 23, 6:28 AM CDTFlash Flood WarningEAXBates, Cass, Henry, Jackson, Johnson, Lafayette and 2 more6 hr
Apr 23, 10:09 AM CDTRiver Flood WarningEAXCooper, Saline7 days
Apr 22, 8:19 PM CDTRiver Flood WarningEAXMiami4 days
Apr 22, 8:19 PM CDTRiver Flood WarningEAXLinn5 days

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.