Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 97, NWS Kansas City, MO

August 8, 2012Clay County, Platte County, Missouri; Leavenworth County, Wyandotte County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at Aug 8, 2012, 7:03 PM CDT for Clay County, Platte County, Missouri; Leavenworth County, Wyandotte County, Kansas. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 8, 2012, 7:03 PM CDT (00:03 UTC)
Expired: Aug 8, 2012, 7:30 PM CDT
In force: 27 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Leavenworth County, KS, Wyandotte County, KS, Clay County, MO, Platte County, MO

The radar

The Pleasant Hill radar (KEAX), 71 km from the middle of the area, began a volume at 00:05 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.

What was reported inside it

Time	Report	Where	Remark
Aug 8, 7:15 PM CDT	TSTM WND GST 64	Kci Airport, MO	GUST TO 55KT MEASURED

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 8, 4:53 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 0.1 hours before the alert went out and 72 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: 1202 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 2811 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

334 
WUUS53 KEAX 090003 RRA
SVREAX
KSC103-209-MOC047-165-090030-
/O.NEW.KEAX.SV.W.0097.120809T0003Z-120809T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
703 PM CDT WED AUG 8 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN LEAVENWORTH COUNTY IN NORTHEAST KANSAS...
  WESTERN WYANDOTTE COUNTY IN NORTHEAST KANSAS...
  WEST CENTRAL CLAY COUNTY IN WEST CENTRAL MISSOURI...
  PLATTE COUNTY IN WEST CENTRAL MISSOURI...

* UNTIL 730 PM CDT

* AT 658 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR             
  LEAVENWORTH...AND MOVING SOUTHEAST AT 35 MPH.

  HAZARD...60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
           BROKEN.

* LOCATIONS IMPACTED INCLUDE...
  PLATTE CITY...LANSING...WEATHERBY LAKE...PARKVILLE...TRACY...
  FERRELVIEW...PLATTE WOODS...LAKE WAUKOMIS...EAST LEAVENWORTH...
  FAIRMOUNT...FARLEY...HOOVER...WALDRON...KANSAS CITY INTL ARPT...
  PIPER...WOLCOTT...POMEROY...MAYWOOD AND BEVERLY HILLS.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-435 LOOP FROM MILE MARKERS 11 TO 42.
  I-29 BETWEEN MILE MARKERS 6 AND 24.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3930 9507 3947 9483 3929 9451 3906 9484
      3906 9486
TIME...MOT...LOC 0004Z 309DEG 28KT 3931 9490

HAIL...<.75IN
WIND...60 MPH

$$

DEROCHE

1 follow-up statement

171 
WWUS53 KEAX 090017
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
717 PM CDT WED AUG 8 2012

KSC103-209-MOC047-165-090030-
/O.CON.KEAX.SV.W.0097.000000T0000Z-120809T0030Z/
LEAVENWORTH KS-WYANDOTTE KS-CLAY MO-PLATTE MO-
717 PM CDT WED AUG 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
PLATTE...WEST CENTRAL CLAY...WESTERN WYANDOTTE AND EAST CENTRAL
LEAVENWORTH COUNTIES UNTIL 730 PM CDT...

AT 714 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR LANSING...AND 
MOVING SOUTHEAST AT 30 MPH. AT 651 PM...LOCAL EMERGENCY MANAGEMENT 
REPORTED A 60 MPH WIND GUST IN LEAVENWORTH. AT 701 PM...LOCAL 
EMERGENCY MANAGEMENT REPORTED A 60 MPH WIND GUST 1 MILE WEST OF 
JARBALO.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
         BROKEN.

LOCATIONS IMPACTED INCLUDE...
WEATHERBY LAKE...PARKVILLE...FERRELVIEW...PLATTE WOODS...LAKE
WAUKOMIS...KANSAS CITY INTL ARPT...WALDRON...PIPER...WOLCOTT...
POMEROY...MAYWOOD AND BEVERLY HILLS.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-435 LOOP FROM MILE MARKERS 11 TO 42.
  I-29 BETWEEN MILE MARKERS 6 AND 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3945 9479 3929 9451 3906 9484 3906 9486
      3928 9504
TIME...MOT...LOC 0017Z 309DEG 28KT 3925 9480

HAIL...<.75IN
WIND...60 MPH

$$

DEROCHE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 7:01 PM CDT	Special Weather Statement	EAX	Platte	29 min
Aug 8, 7:15 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Jackson, Platte	30 min
Aug 8, 7:22 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Nodaway	38 min
Aug 8, 7:34 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Clinton, Jackson, Lafayette, Platte, Ray	26 min
Aug 8, 7:48 PM CDT	Special Weather Statement	EAX	Cass	27 min
Aug 8, 7:56 PM CDT	Severe Thunderstorm Warning	EAX	Gentry, Nodaway, Worth	34 min
Aug 8, 8:01 PM CDT	Special Weather Statement	EAX	Jackson, Lafayette, Ray	29 min
Aug 8, 8:19 PM CDT	Special Weather Statement	EAX	Daviess	41 min
Aug 8, 8:30 PM CDT	Special Weather Statement	EAX	Johnson, Lafayette	30 min
Aug 8, 8:33 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, Grundy, Livingston	42 min
Aug 8, 8:54 PM CDT	Special Weather Statement	EAX	Johnson, Pettis, Saline	36 min
Aug 8, 9:19 PM CDT	Special Weather Statement	EAX	Grundy	26 min
Aug 8, 7:03 PM CDT	Severe Thunderstorm Warning	EAX	Linn	27 min
Aug 8, 7:07 PM CDT	Special Weather Statement	EAX	Leavenworth	38 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Severe Thunderstorm Warnings in Kansas, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.