Alert archive / Kansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 35, NWS Kansas City, MO

May 6, 2012Johnson County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at May 6, 2012, 4:30 PM CDT for Johnson County, Kansas. It was in force for 30 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: May 6, 2012, 4:30 PM CDT (21:30 UTC)
Expired: May 6, 2012, 5:00 PM CDT
In force: 30 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Johnson County, KS

The radar

The Pleasant Hill radar (KEAX), 64 km from the middle of the area, began a volume at 21:31 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
May 6, 4:54 PM CDT	HAIL 1.25	De Soto, KS

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
May 6, 3:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 9.5 hours before the alert went out and 58 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.

795 
WUUS53 KEAX 062130
SVREAX
KSC091-062200-
/O.NEW.KEAX.SV.W.0035.120506T2130Z-120506T2200Z/

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

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

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

* UNTIL 500 PM CDT

* AT 426 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR EUDORA...AND
  MOVING EAST AT 10 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.

* LOCATIONS IMPACTED INCLUDE...
  DE SOTO AND CLEARVIEW CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3898 9503 3900 9501 3898 9495 3900 9493
      3900 9492 3899 9492 3899 9491 3898 9490
      3888 9491 3888 9506 3898 9506
TIME...MOT...LOC 2131Z 260DEG 8KT 3893 9505

HAIL...1.50IN
WIND...60 MPH

$$

DEROCHE

3 follow-up statements

520 
WWUS53 KEAX 062144
SVSEAX

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

KSC091-062200-
/O.CON.KEAX.SV.W.0035.000000T0000Z-120506T2200Z/
JOHNSON KS-
444 PM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
JOHNSON COUNTY IN EAST CENTRAL KANSAS UNTIL 500 PM CDT...

AT 441 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DE SOTO...AND
MOVING EAST AT 10 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.

LOCATIONS IMPACTED INCLUDE...
DE SOTO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3898 9503 3900 9501 3898 9495 3900 9493
      3900 9492 3899 9492 3899 9491 3898 9490
      3888 9491 3888 9506 3898 9506
TIME...MOT...LOC 2144Z 251DEG 9KT 3894 9500

HAIL...1.50IN
WIND...60 MPH

$$

DEROCHE

469 
WWUS53 KEAX 062151
SVSEAX

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

KSC091-062200-
/O.CON.KEAX.SV.W.0035.000000T0000Z-120506T2200Z/
JOHNSON KS-
451 PM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL 
JOHNSON COUNTY IN EAST CENTRAL KANSAS UNTIL 500 PM CDT...

AT 450 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DE SOTO...AND
MOVING EAST AT 10 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...
DE SOTO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3898 9503 3900 9501 3898 9495 3900 9493
      3900 9492 3899 9492 3899 9491 3898 9490
      3888 9491 3888 9506 3898 9506
TIME...MOT...LOC 2151Z 251DEG 9KT 3895 9498

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

$$

DEROCHE

962 
WWUS53 KEAX 062155
SVSEAX

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

KSC091-062205-
/O.EXP.KEAX.SV.W.0035.000000T0000Z-120506T2200Z/
JOHNSON KS-
455 PM CDT SUN MAY 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL JOHNSON COUNTY IN
EAST CENTRAL KANSAS WILL EXPIRE AT 500 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11PM.

LAT...LON 3898 9503 3900 9501 3898 9495 3900 9493
      3900 9492 3899 9492 3899 9491 3898 9490
      3888 9491 3888 9506 3898 9506
TIME...MOT...LOC 2155Z 251DEG 9KT 3895 9497

$$

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, 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
May 6, 6:53 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	37 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.