Alert archive / Kansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 47, NWS Kansas City, MO

May 6, 2012Johnson County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at May 6, 2012, 6:53 PM CDT for Johnson County, Kansas. It was in force for 37 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, 6:53 PM CDT (23:53 UTC)
Expired: May 6, 2012, 7:30 PM CDT
In force: 37 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Johnson County, KS

The radar

The Pleasant Hill radar (KEAX), 57 km from the middle of the area, began a volume at 23:56 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 6, 3:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 11.9 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: 1880 J/kg
Mixed-layer CIN: -240 J/kg
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 286 m²/s²
0-3 km storm-relative helicity: 218 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.

200 
WUUS53 KEAX 062353
SVREAX
KSC091-070030-
/O.NEW.KEAX.SV.W.0047.120506T2353Z-120507T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
653 PM CDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS...

* UNTIL 730 PM CDT

* AT 652 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR GARDNER...
  AND MOVING NORTHEAST AT 5 MPH.

  HAZARD...HALF DOLLAR SIZE HAIL AND 60 MPH WIND GUSTS.

  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...
  CLARE.

THIS WILL IMPACT

 I-35 BETWEEN MILE MARKERS 209 AND 213.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3892 9490 3881 9483 3879 9496 3883 9500
TIME...MOT...LOC 2353Z 234DEG 6KT 3884 9493

HAIL...1.25IN
WIND...60 MPH

$$

DEROCHE

1 follow-up statement

374 
WWUS53 KEAX 070019
SVSEAX

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

KSC091-070030-
/O.CON.KEAX.SV.W.0047.000000T0000Z-120507T0030Z/
JOHNSON KS-
719 PM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL 
JOHNSON COUNTY IN EAST CENTRAL KANSAS UNTIL 730 PM CDT...

AT 718 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR OLATHE...AND
MOVING NORTHEAST AT 5 MPH.

HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

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

AT 639 PM...TRAINED WEATHER SPOTTERS REPORTED HALF DOLLAR SIZE HAIL
IN OLATHE.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF CENTRAL JOHNSON COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3881 9483 3880 9493 3883 9495 3889 9488
TIME...MOT...LOC 0019Z 234DEG 6KT 3887 9488

HAIL...1.50IN
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
May 6, 11:02 AM CDT	Areal Flood Advisory	EAX	Johnson, Wyandotte	5 hr
May 6, 4:25 PM CDT	Special Weather Statement	EAX	Johnson	35 min
May 6, 4:30 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	30 min
May 6, 5:59 PM CDT	Special Weather Statement	EAX	Johnson	46 min
May 6, 6:05 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	25 min
May 6, 6:10 PM CDT	Tornado Warning	EAX	Johnson	35 min
May 6, 6:42 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	19 min
May 6, 6:48 PM CDT	Areal Flood Advisory	EAX	Johnson, Leavenworth, Wyandotte	2 hr

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.