Alert archive / Washington / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Pendleton, OR

July 17, 2012Kittitas County, Washington

NWS Pendleton, OR issued this severe thunderstorm warning at Jul 17, 2012, 7:28 PM PDT for Kittitas County, Washington. It was in force for 62 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: Jul 17, 2012, 7:28 PM PDT (02:28 UTC)
Expired: Jul 17, 2012, 8:30 PM PDT
In force: 62 min
Issued by: NWS Pendleton, OR
Area: Storm-based polygon

County Kittitas County, WA

The radar

The Pendleton radar (KPDT), 186 km from the middle of the area, began a volume at 02:31 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.

The nearest sounding before it

Salem/Mcnary, OR (KSLE), launched 00:00Z, 2.5 hours before the alert went out and 306 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: 62 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 1305 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

609 
WUUS56 KPDT 180228
SVRPDT
WAC037-180330-
/O.NEW.KPDT.SV.W.0021.120718T0228Z-120718T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
728 PM PDT TUE JUL 17 2012

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL KITTITAS COUNTY IN CENTRAL WASHINGTON...
  THIS INCLUDES THE CITY OF ELLENSBURG...

* UNTIL 830 PM PDT

* AT 724 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL AND VERY HEAVY     
  RAINFALL.  THIS STORM WAS LOCATED 8 MILES SOUTHEAST OF             
  ELLENSBURG...AND MOVING NORTHEAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  KITTITAS AND ELLENSBURG.

IF YOU EXPERIENCE SEVERE WEATHER PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN PENDLETON AT 1...8...0...0...2...4...0...4...5...2...7.

LAT...LON 4714 12035 4694 12009 4678 12046 4694 12065
TIME...MOT...LOC 0227Z 228DEG 4KT 4691 12045

$$

DGW

2 follow-up statements

438 
WWUS56 KPDT 180258
SVSPDT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OR
758 PM PDT TUE JUL 17 2012

WAC037-180330-
/O.CON.KPDT.SV.W.0021.000000T0000Z-120718T0330Z/
KITTITAS WA-
758 PM PDT TUE JUL 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM PDT
FOR CENTRAL KITTITAS COUNTY...

AT 754 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM  THIS STORM WAS LOCATED 6 MILES SOUTH
OF KITTITAS...OR 11 MILES SOUTHEAST OF ELLENSBURG...MOVING NORTHEAST
AT 5 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAIL TO THE SIZE OF QUARTERS IS LIKELY. FOR YOUR PROTECTION MOVE TO A
STURDY SHELTER UNTIL THE STORM PASSES.

&&

LAT...LON 4714 12035 4694 12009 4678 12046 4694 12065
TIME...MOT...LOC 0257Z 228DEG 4KT 4690 12038

$$

MCW

877 
WWUS56 KPDT 180329
SVSPDT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OR
829 PM PDT TUE JUL 17 2012

WAC037-180338-
/O.EXP.KPDT.SV.W.0021.000000T0000Z-120718T0330Z/
KITTITAS WA-
829 PM PDT TUE JUL 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL KITTITAS COUNTY WILL
EXPIRE AT 830 PM PDT...

THE LARGE THUNDERSTORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING 
HAS WEAKENED AND IS MOVING OUT OF THE WARNING AREA.  THE SEVERE 
THUNDERSTORM WARNING IS NO LONGER IN EFFECT.


LAT...LON 4714 12035 4694 12009 4678 12046 4694 12065
TIME...MOT...LOC 0328Z 228DEG 4KT 4692 12034

$$

MCW

The office that day

Everything else NWS Pendleton, OR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 17, 5:48 PM PDT	Severe Thunderstorm Warning	PDT	Klickitat	42 min
Jul 17, 6:04 PM PDT	Severe Thunderstorm Warning	PDT	Yakima	56 min
Jul 17, 6:32 PM PDT	Flash Flood Warning	PDT	Yakima	73 min
Jul 17, 6:38 PM PDT	Special Weather Statement	PDT	Kittitas	67 min
Jul 17, 6:49 PM PDT	Flash Flood Warning	PDT	Yakima	56 min
Jul 17, 6:59 PM PDT	Special Weather Statement	PDT	Yakima	61 min

Nearby

Severe Thunderstorm Warnings in Washington, 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.