Alert archive / Washington / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Spokane, WA

June 23, 2012Pend Oreille County, Stevens County, Washington

NWS Spokane, WA issued this severe thunderstorm warning at Jun 23, 2012, 10:10 AM PDT for Pend Oreille County, Stevens County, Washington. It was in force for 26 min. 2 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: Jun 23, 2012, 10:10 AM PDT (17:10 UTC)
Expired: Jun 23, 2012, 10:36 AM PDT
In force: 26 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon

Counties Pend Oreille County, WA, Stevens County, WA

The radar

The Spokane radar (KOTX), 132 km from the middle of the area, began a volume at 17:10 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
Jun 23, 10:15 AM PDT	HAIL 1	4 Nw Ruby, WA	PUBLIC REPORT
Jun 23, 10:20 AM PDT	HAIL 1	6 Nnw Ruby, WA	PUBLIC REPORT

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

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 5.2 hours before the alert went out and 152 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 164 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.

454 
WUUS56 KOTX 231710
SVROTX
WAC051-065-231800-
/O.NEW.KOTX.SV.W.0009.120623T1710Z-120623T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
1010 AM PDT SAT JUN 23 2012

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN PEND OREILLE COUNTY IN NORTHEAST WASHINGTON...
  NORTHEASTERN STEVENS COUNTY IN NORTHEAST WASHINGTON...

* UNTIL 1100 AM PDT

* AT 1001 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR RUBY...OR 28 MILES NORTHWEST OF NEWPORT...
  AND MOVING NORTH AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LITTLE PEND OREILLE LAKES CAMPGROUND...TIGER...IONE...METALINE...
  METALINE FALLS AND NORTHPORT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM WILL ALSO PRODUCE EXTREMELY HEAVY RAINFALL. IF DRIVING
THROUGH THE STORM REDUCE YOUR SPEED TO LOWER THE RISK OF
HYDROPLANING. ALSO BE PREPARED FOR PONDING OF WATER IN LOW LYING
AREAS.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

HAIL UP TO QUARTERS IN DIAMETER HAS BEEN REPORTED IN 12 MILES SOUTH 
OF IONE WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE 
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4900 11733 4853 11722 4850 11743 4900 11788
      4901 11773 4901 11737
TIME...MOT...LOC 1710Z 162DEG 31KT 4861 11736

$$

SB

2 follow-up statements

499 
WWUS56 KOTX 231719
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1019 AM PDT SAT JUN 23 2012

WAC051-065-231800-
/O.CON.KOTX.SV.W.0009.000000T0000Z-120623T1800Z/
PEND OREILLE WA-STEVENS WA-
1019 AM PDT SAT JUN 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM PDT
FOR NORTHEASTERN STEVENS AND NORTHWESTERN PEND OREILLE COUNTIES...

AT 1010 AM PDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS
LOCATED 6 MILES SOUTH OF TIGER...OR 33 MILES NORTHWEST OF NEWPORT...
MOVING NORTH AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO IONE...
METALINE...METALINE FALLS AND NORTHPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THIS STORM WILL ALSO PRODUCE EXTREMELY HEAVY RAINFALL. IF DRIVING
THROUGH THE STORM REDUCE YOUR SPEED TO LOWER THE RISK OF
HYDROPLANING. ALSO BE PREPARED FOR PONDING OF WATER IN LOW LYING
AREAS.

HAIL UP TO QUARTERS IN DIAMETER HAS BEEN REPORTED 12 MILES SOUTH OF 
IONE WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE 
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4900 11733 4859 11732 4850 11743 4900 11788
      4901 11773 4901 11737
TIME...MOT...LOC 1719Z 162DEG 31KT 4868 11740

$$

SB

363 
WWUS56 KOTX 231736
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1036 AM PDT SAT JUN 23 2012

WAC051-065-231746-
/O.CAN.KOTX.SV.W.0009.000000T0000Z-120623T1800Z/
PEND OREILLE WA-STEVENS WA-
1036 AM PDT SAT JUN 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN STEVENS AND
NORTHWESTERN PEND OREILLE COUNTIES IS CANCELLED...

DOPPLER RADAR INDICATED THE STORM WAS NO LONGER SEVERE AND THE
WARNING WAS ALLOWED TO EXPIRE. .

LAT...LON 4900 11733 4859 11732 4850 11743 4900 11788
      4901 11773 4901 11737
TIME...MOT...LOC 1736Z 162DEG 31KT 4882 11747

$$

SB

The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 22, 9:11 PM PDT	Areal Flood Advisory	OTX	Ferry, Pend Oreille, Stevens	3 hr
Jun 23, 9:08 AM PDT	Severe Thunderstorm Warning	OTX	Pend Oreille, Stevens	36 min
Jun 23, 9:11 AM PDT	Severe Thunderstorm Warning	OTX	Pend Oreille, Stevens	49 min
Jun 23, 11:09 AM PDT	Areal Flood Advisory	OTX	Pend Oreille	4 hr
Jun 23, 2:14 PM PDT	Special Weather Statement	OTX	Grant	46 min
Jun 23, 3:05 PM PDT	Severe Thunderstorm Warning	OTX	Garfield, Whitman	55 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.