Alert archive / Missouri / Special Weather Statements in 2012

Special Weather Statement, NWS Kansas City, MO

May 6, 2012Pettis County, Missouri

NWS Kansas City, MO issued this special weather statement at May 6, 2012, 8:21 PM CDT for Pettis 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
May 6, 2012, 8:21 PM CDT (01:21 UTC)
Expired
May 6, 2012, 8:45 PM CDT
In force
24 min
Issued by
NWS Kansas City, MO

County Pettis County, MO

The radar

The Pleasant Hill radar (KEAX), 108 km from the middle of the area, began a volume at 01:21 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

Springfield, MO (KSGF), launched 00:00Z, 1.4 hours before the alert went out and 226 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 00:00Z on 2012-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 768 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2012-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.1939Sfc1 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
768 J/kg
Mixed-layer CIN
-171 J/kg
Mixed-layer LCL
1686 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
47 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.

836 
WWUS83 KEAX 070121
SPSEAX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
821 PM CDT SUN MAY 6 2012

MOZ045-046-070145-
COOPER MO-PETTIS MO-
821 PM CDT SUN MAY 6 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN PETTIS AND WESTERN
COOPER COUNTIES UNTIL 845 PM CDT...

AT 816 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 5 MILES NORTH OF SEDALIA...MOVING EAST AT 35 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  PILOT GROVE AND CLIFTON CITY.

THIS WILL IMPACT

 I-70 BETWEEN MILE MARKERS 91 AND 98.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

LAT...LON 3895 9284 3870 9283 3872 9331 3889 9330
TIME...MOT...LOC 0121Z 265DEG 32KT 3878 9319

$$

DEROCHE

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 7:14 PM CDTSpecial Weather StatementEAXPettis46 min
May 6, 7:28 PM CDTAreal Flood AdvisoryEAXCaldwell, Clinton4 hr
May 6, 7:59 PM CDTSpecial Weather StatementEAXSaline46 min
May 6, 8:18 PM CDTFlash Flood WarningEAXJackson6 hr
May 6, 8:20 PM CDTSpecial Weather StatementEAXRay10 min
May 6, 8:23 PM CDTSpecial Weather StatementEAXChariton, Howard37 min
May 6, 8:44 PM CDTRiver Flood WarningEAXJackson3 hr
May 6, 8:46 PM CDTRiver Flood WarningEAXRay40 hr
May 6, 9:55 PM CDTSpecial Weather StatementEAXCooper50 min
May 6, 10:39 PM CDTRiver Flood WarningEAXCass, Henry, Johnson26 hr
May 6, 10:39 PM CDTRiver Flood WarningEAXBates, Cass, Henry11 hr
May 6, 11:30 PM CDTAreal Flood WarningEAXCass, Jackson11 hr
May 7, 12:22 AM CDTSpecial Weather StatementEAXJohnson23 min
May 6, 7:04 PM CDTFlash Flood WarningEAXJohnson7 hr
May 6, 7:08 PM CDTSevere Thunderstorm WarningEAXJohnson37 min
May 6, 7:23 PM CDTSevere Thunderstorm WarningEAXJohnson, Miami24 min
May 6, 8:06 PM CDTSpecial Weather StatementEAXJohnson9 min
May 6, 8:08 PM CDTSpecial Weather StatementEAXMiami37 min
May 6, 8:39 PM CDTSpecial Weather StatementEAXMiami21 min
May 6, 9:07 PM CDTSevere Thunderstorm WarningEAXMiami23 min

Nearby

Special Weather Statements in Missouri, 2012Every special weather statement in 2012

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.