Alert archive / Missouri / Special Weather Statements in 2009

Special Weather Statement, NWS Kansas City, MO

August 3, 2009Clinton County, Missouri

NWS Kansas City, MO issued this special weather statement at Aug 3, 2009, 2:21 AM CDT for Clinton County, Missouri. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 3, 2009, 2:21 AM CDT (07:21 UTC)
Expired: Aug 3, 2009, 2:45 AM CDT
In force: 24 min
Issued by: NWS Kansas City, MO

County Clinton County, MO

The radar

The Pleasant Hill radar (KEAX), 96 km from the middle of the area, began a volume at 07:21 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

Topeka, KS (KTOP), launched 00:00Z, 7.4 hours before the alert went out and 137 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: 40 J/kg
Mixed-layer CIN: -459 J/kg
Mixed-layer LCL: 1888 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS83 KEAX 030721
SPSEAX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
221 AM CDT MON AUG 3 2009

MOZ021-030745-
CLINTON-
221 AM CDT MON AUG 3 2009

...SIGNIFICANT WEATHER ALERT FOR NORTHEASTERN CLINTON COUNTY UNTIL
245 AM CDT...

AT 219 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES SOUTHEAST OF STEWARTSVILLE...OR 8 MILES
NORTH OF PLATTSBURG...MOVING EAST AT 20 MPH.

NICKEL SIZE HAIL IS EXPECTED WITH THIS STORM.

THIS STORM WILL AFFECT MAINLY RURAL AREAS OF NORTHEASTERN CLINTON
COUNTY...INCLUDING THE TOWN OF TURNEY.

LAT...LON 3973 9422 3966 9422 3955 9423 3964 9451
      3974 9447

$$

21

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 2:45 AM CDT	Special Weather Statement	EAX	Caldwell	30 min
Aug 3, 8:02 AM CDT	Special Weather Statement	EAX	Grundy	28 min
Aug 3, 8:07 AM CDT	Special Weather Statement	EAX	Chariton	23 min
Aug 3, 8:23 AM CDT	Special Weather Statement	EAX	Linn	37 min
Aug 3, 8:39 AM CDT	Special Weather Statement	EAX	Chariton	36 min
Aug 3, 9:03 AM CDT	Severe Thunderstorm Warning	EAX	Chariton, Howard, Randolph	25 min
Aug 3, 9:30 AM CDT	Special Weather Statement	EAX	Randolph	30 min
Aug 3, 9:43 AM CDT	Special Weather Statement	EAX	Howard	32 min

Nearby

Special Weather Statements in Missouri, 2009 Every special weather statement in 2009

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.