Alert archive / Washington / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 21, NWS Spokane, WA

August 25, 2013Pend Oreille County, Washington; Bonner County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at Aug 25, 2013, 9:31 PM PDT for Pend Oreille County, Washington; Bonner County, Idaho. It was in force for 74 min. 4 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 25, 2013, 9:31 PM PDT (04:31 UTC)
Expired: Aug 25, 2013, 10:45 PM PDT
In force: 74 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon

Counties Bonner County, ID, Pend Oreille County, WA

The radar

The Spokane radar (KOTX), 112 km from the middle of the area, began a volume at 04:34 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 25, 9:33 PM PDT	TSTM WND DMG	Oldtown, ID	TREE ON POWER LINE. 41 CUSTOMERS AFFECTED.
Aug 25, 10:00 PM PDT	TSTM WND DMG	Tiger, WA	NUMEROUS POWER OUTAGES DUE TO TREES ON POWER LINES
Aug 25, 10:30 PM PDT	TSTM WND DMG	11 Nnw Nordman, WA	* 1 FATAL, 1 INJ * 200 FOOT TALL TREE UPROOTED AND FELL ON A TENT AT THE STAGGER INN CAMPGROUND IN THE KANIKSU NATIONAL FOREST.
Aug 25, 10:30 PM PDT	NON-TSTM WND DMG	11 Nnw Nordman, WA	* 1 FATAL, 1 INJ * 200 FOOT TALL TREE UPROOTED AND FELL ON A TENT AT THE STAGGER INN CAMPGROUND IN THE KANIKSU NATIONAL FOREST.

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 00:00Z, 4.5 hours before the alert went out and 112 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: 148 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 2316 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.8

Open this sounding in Storm Lab

The text

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

271 
WUUS56 KOTX 260431
SVROTX
IDC017-WAC051-260545-
/O.NEW.KOTX.SV.W.0021.130826T0431Z-130826T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
931 PM PDT SUN AUG 25 2013

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PEND OREILLE COUNTY IN NORTHEAST WASHINGTON...
  THIS INCLUDES THE CITY OF METALINE FALLS...
  BONNER COUNTY IN THE PANHANDLE OF IDAHO...
  THIS INCLUDES THE CITIES OF...SANDPOINT...PRIEST RIVER...

* UNTIL 1045 PM PDT

* AT 922 PM PDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE         
  THUNDERSTORM.  THIS STORM WAS LOCATED ACROSS CENTRAL PEND OREILLE  
  COUNTY INTO SOUTHERN BONNER COUNTY FROM SACHEEN LAKE TO            
  BLANCHARD...AND MOVING NORTHEAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOUTH
  SKOOKUM LAKE CAMPGROUND...COCOLALLA...BROWNS LAKE CAMPGROUND...
  RUBY...GRANITE...LOST CREEK...TIGER...DOVER...IONE...SANDPOINT...
  PONDERAY...COOLIN...SCHWEITZER MOUNTAIN...KOOTENAI...CLARK FORK...
  NOISY CREEK CAMPGROUND...HOPE...EAST HOPE...METALINE...COLBURN...
  METALINE FALLS...NORDMAN...SULLIVAN LAKE CAMPGROUND...ELMIRA AND
  BEAVER CREEK CAMPGROUND

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS 
THE SPOKANE AREA AND NORTHEAST MOUTAINS. NUMEROUS POWER OUTAGES 
REPORTED AND NUMEROUS TREES REPORTED DOWN ACROSS THESE AREAS. THIS 
IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4885 11702 4884 11679 4850 11678 4850 11613
      4844 11604 4809 11605 4807 11625 4800 11642
      4798 11690 4829 11750 4865 11750 4866 11763
      4874 11763 4875 11756 4883 11756 4884 11750
      4892 11750 4900 11743 4901 11742 4901 11703
TIME...MOT...LOC 0429Z 220DEG 39KT 4823 11696

$$

VAN HORN

3 follow-up statements

824 
WWUS56 KOTX 260507
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1007 PM PDT SUN AUG 25 2013

IDC017-WAC051-260545-
/O.CON.KOTX.SV.W.0021.000000T0000Z-130826T0545Z/
BONNER ID-PEND OREILLE WA-
1007 PM PDT SUN AUG 25 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM PDT
FOR PEND OREILLE AND NORTHERN BONNER COUNTIES...

AT 1002 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS 
OF 60 MPH. THESE STORMS WERE LOCATED WEST OF SANDPOINT INTO NORTHERN 
PEND OREILLE COUNTY ACROSS BROWNS LAKE CAMPGROUND TO TIGER...MOVING 
NORTHEAST AT 50 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NOISY
CREEK CAMPGROUND...METALINE...SULLIVAN LAKE CAMPGROUND AND BEAVER
CREEK CAMPGROUND.

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.

&&

LAT...LON 4885 11703 4884 11679 4850 11678 4850 11613
      4848 11609 4824 11629 4815 11691 4844 11750
      4865 11750 4866 11763 4874 11763 4875 11756
      4883 11756 4884 11750 4893 11749 4893 11743
      4901 11742 4901 11703
TIME...MOT...LOC 0506Z 203DEG 43KT 4866 11704

$$

VAN HORN

808 
WWUS56 KOTX 260522
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1022 PM PDT SUN AUG 25 2013

IDC017-WAC051-260545-
/O.CON.KOTX.SV.W.0021.000000T0000Z-130826T0545Z/
BONNER ID-PEND OREILLE WA-
1022 PM PDT SUN AUG 25 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM PDT
FOR NORTHERN PEND OREILLE AND NORTHERN BONNER COUNTIES...

AT 1016 PM PDT...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE 
THUNDERSTORMS CAPABLE OF PRODUCING SEVERE WINDS OF 60 MPH. THESE 
STORMS WERE LOCATED ALONG A LINE FROM COOLING TO BETWEEN LOST CREEK 
AND TIGER...MOVING NORTH AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
METALINE...BEAVER CREEK CAMPGROUND AND SULLIVAN LAKE CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4885 11703 4884 11679 4850 11678 4850 11621
      4848 11639 4838 11657 4849 11747 4865 11750
      4867 11763 4874 11763 4875 11756 4883 11755
      4884 11750 4891 11750 4893 11743 4901 11741
      4901 11703
TIME...MOT...LOC 0519Z 200DEG 35KT 4873 11704

$$

VAN HORN

578 
WWUS56 KOTX 260538
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1038 PM PDT SUN AUG 25 2013

IDC017-WAC051-260548-
/O.CAN.KOTX.SV.W.0021.000000T0000Z-130826T0545Z/
BONNER ID-PEND OREILLE WA-
1038 PM PDT SUN AUG 25 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN PEND OREILLE AND
NORTHERN BONNER COUNTIES IS CANCELLED...

DOPPLER RADAR INDICATED THE LINE OF STORMS HAVE MOVED OUT OF THE 
WARNED AREA INTO BRITISH COLUMBIA. 

LAT...LON 4885 11703 4884 11679 4850 11678 4850 11621
      4848 11639 4838 11657 4849 11747 4865 11750
      4867 11763 4874 11763 4875 11756 4883 11755
      4884 11750 4891 11750 4893 11743 4901 11741
      4901 11703
TIME...MOT...LOC 0538Z 200DEG 35KT 4890 11694

$$

VAN HORN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 6:37 PM PDT	Severe Thunderstorm Warning	OTX	Adams, Grant, Whitman	53 min
Aug 25, 7:34 PM PDT	Severe Thunderstorm Warning	OTX	Adams, Lincoln, Spokane, Whitman	26 min
Aug 25, 7:59 PM PDT	Severe Thunderstorm Warning	OTX	Lincoln, Spokane, Whitman	61 min
Aug 25, 8:26 PM PDT	Severe Thunderstorm Warning	OTX	Ferry, Stevens	64 min
Aug 25, 8:43 PM PDT	Severe Thunderstorm Warning	OTX	Chelan, Douglas, Grant, Okanogan	62 min
Aug 25, 8:45 PM PDT	Severe Thunderstorm Warning	OTX	Pend Oreille, Spokane	60 min
Aug 25, 9:13 PM PDT	Severe Thunderstorm Warning	OTX	Ferry, Stevens	92 min
Aug 26, 8:57 AM PDT	Flash Flood Watch	OTX	Chelan	10 hr
Aug 25, 7:29 PM PDT	Severe Thunderstorm Warning	OTX	Latah, Shoshone	31 min
Aug 25, 7:53 PM PDT	Severe Thunderstorm Warning	OTX	Benewah, Latah, Shoshone	22 min
Aug 25, 8:10 PM PDT	Severe Thunderstorm Warning	OTX	Benewah, Kootenai, Shoshone	35 min
Aug 25, 10:14 PM PDT	Severe Thunderstorm Warning	OTX	Boundary	61 min
Aug 25, 11:16 PM PDT	Severe Thunderstorm Warning	OTX	Lewis	44 min

Nearby

Severe Thunderstorm Warnings in Washington, 2013 Severe Thunderstorm Warnings in Idaho, 2013 Every severe thunderstorm warning in 2013

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.