Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 98, NWS Kansas City, MO

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

NWS Kansas City, MO issued this severe thunderstorm warning at Aug 8, 2012, 7:15 PM CDT for Clay County, Jackson County, Platte County, Missouri; Johnson County, Leavenworth County, Wyandotte County, Kansas. It was in force for 30 min. 12 reports 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, 7:15 PM CDT (00:15 UTC)
Expired: Aug 8, 2012, 7:45 PM CDT
In force: 30 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Pleasant Hill radar (KEAX), 62 km from the middle of the area, began a volume at 00:18 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
Aug 8, 7:24 PM CDT	TSTM WND DMG	3 W Basehor, KS	SMALL GARAGE BLOWN DOWN AT 174TH AND STATE LINE RD
Aug 8, 7:25 PM CDT	TSTM WND GST 0	Kansas City, MO	60 MPH WINDS REPORTED DOWNTOWN AT RIVER MARKET.
Aug 8, 7:25 PM CDT	TSTM WND GST 60	Kansas City, MO	60 MPH WINDS REPORTED DOWNTOWN AT RIVER MARKET.
Aug 8, 7:27 PM CDT	TSTM WND DMG	Gladstone, MO	TREES DOWN....ESTD 55 MPH WINDS
Aug 8, 7:37 PM CDT	TSTM WND GST 0	Olathe, KS	60 MPH WIND AT 199TH AND BLACK BOB.
Aug 8, 7:37 PM CDT	TSTM WND GST 60	Olathe, KS	60 MPH WIND AT 199TH AND BLACK BOB.
Aug 8, 7:38 PM CDT	TSTM WND GST 0	Overland Park, KS	50 MPH WND..135TH AND CLAIRBORNE
Aug 8, 7:38 PM CDT	TSTM WND GST 50	Overland Park, KS	50 MPH WND..135TH AND CLAIRBORNE
Aug 8, 7:41 PM CDT	TSTM WND GST 0	Smithville, MO	55-60 MPH WNDS EXCELSIOR SPRINGS
Aug 8, 7:41 PM CDT	TSTM WND GST 60	Smithville, MO	55-60 MPH WNDS EXCELSIOR SPRINGS
Aug 8, 7:48 PM CDT	TSTM WND DMG	Glenaire, MO	NUMEROUS TREES DOWN

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, 0.3 hours before the alert went out and 65 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.

214 
WUUS53 KEAX 090015
SVREAX
KSC091-103-209-MOC047-095-165-090045-
/O.NEW.KEAX.SV.W.0098.120809T0015Z-120809T0045Z/

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

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN JOHNSON COUNTY IN EAST CENTRAL KANSAS...
  SOUTHERN LEAVENWORTH COUNTY IN NORTHEAST KANSAS...
  WYANDOTTE COUNTY IN NORTHEAST KANSAS...
  CLAY COUNTY IN WEST CENTRAL MISSOURI...
  NORTHWESTERN JACKSON COUNTY IN WEST CENTRAL MISSOURI...
  SOUTHEASTERN PLATTE COUNTY IN WEST CENTRAL MISSOURI...

* UNTIL 745 PM CDT

* AT 714 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
  LINE EXTENDING FROM OAKVIEW TO EDWARDSVILLE TO BASEHOR...AND MOVING
  SOUTHEAST AT 40 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 AND PENNY SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
           DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.

* LOCATIONS IMPACTED INCLUDE...
  RIVERSIDE...GLADSTONE...KANSAS CITY KANSAS...LIBERTY...
  EDWARDSVILLE...CLAYCOMO...BONNER SPRINGS...NORTH KANSAS CITY...LAKE
  QUIVIRA...KANSAS CITY...MERRIAM...MISSION...DE SOTO...WESTWOOD...
  SHAWNEE...FAIRWAY...MISSION HILLS...COURTNEY...PRAIRIE VILLAGE AND
  OVERLAND PARK.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-70 IN MISSOURI BETWEEN MILE MARKERS 0 AND 11.
  I-70 IN KANSAS BETWEEN MILE MARKERS 410 AND 423.
  I-35 IN MISSOURI BETWEEN MILE MARKERS 0 AND 23.
  I-35 IN KANSAS BETWEEN MILE MARKERS 217 AND 235.
  I-635 BETWEEN MILE MARKERS 0 AND 12.
  I-435 LOOP FROM MILE MARKERS 0 TO 25...34 TO 83.
  I-29 BETWEEN MILE MARKERS 0 AND 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3922 9482 3942 9460 3928 9423 3888 9456
      3886 9506 3898 9506 3898 9508 3895 9508
      3895 9510 3897 9512 3919 9515
TIME...MOT...LOC 0015Z 324DEG 37KT 3923 9456 3911 9475
          3911 9499

HAIL...0.75IN
WIND...60 MPH

$$

DEROCHE

1 follow-up statement

340 
WWUS53 KEAX 090046
SVSEAX

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

KSC091-103-209-MOC047-095-165-090055-
/O.EXP.KEAX.SV.W.0098.000000T0000Z-120809T0045Z/
LEAVENWORTH KS-JOHNSON KS-WYANDOTTE KS-CLAY MO-JACKSON MO-PLATTE MO-
746 PM CDT WED AUG 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN JOHNSON COUNTY IN
EAST CENTRAL KANSAS...AND WYANDOTTE AND SOUTHERN LEAVENWORTH COUNTIES
IN NORTHEAST KANSAS...AND SOUTHEASTERN PLATTE...NORTHWESTERN JACKSON
AND CLAY COUNTIES IN WEST CENTRAL MISSOURI HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED 
OUT OF THE WARNED AREA. THIS WARNING HAS BEEN REPLACED BY A NEW 
SEVERE THUNDERSTORM WARNING FOR PORTIONS OF CLAY...JACKSON AND RAY 
COUNTIES. 

LAT...LON 3922 9482 3942 9460 3928 9423 3888 9456
      3886 9506 3898 9506 3898 9508 3895 9508
      3895 9510 3897 9512 3919 9515
TIME...MOT...LOC 0015Z 324DEG 37KT 3923 9456 3911 9475
          3911 9499

$$

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, 7:03 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Platte	27 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.