Alert archive / Washington / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 3, NWS Spokane, WA

July 25, 2011Pend Oreille County, Stevens County, Washington

NWS Spokane, WA issued this severe thunderstorm warning at Jul 25, 2011, 4:18 PM PDT for Pend Oreille County, Stevens County, Washington. It was in force for 38 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 25, 2011, 4:18 PM PDT (23:18 UTC)
Expired: Jul 25, 2011, 4:56 PM PDT
In force: 38 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon

Counties Pend Oreille County, WA, Stevens County, WA

The radar

The Spokane radar (KOTX), 88 km from the middle of the area, began a volume at 23:19 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

Spokane, WA (KOTX), launched 12:00Z, 11.3 hours before the alert went out and 107 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: 3271 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 31 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.

892 
WUUS56 KOTX 252318
SVROTX
WAC051-065-260000-
/O.NEW.KOTX.SV.W.0003.110725T2318Z-110726T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
418 PM PDT MON JUL 25 2011

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL PEND OREILLE COUNTY IN NORTHEAST WASHINGTON...
  EAST CENTRAL STEVENS COUNTY IN NORTHEAST WASHINGTON...

* UNTIL 500 PM PDT

* AT 414 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  EAST OF VALLEY...OR 24 MILES WEST OF NEWPORT...AND MOVING NORTHEAST
  AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  USK...CUSICK...SOUTH SKOOKUM LAKE CAMPGROUND...BROWNS LAKE
  CAMPGROUND AND RUBY

LAT...LON 4867 11727 4863 11705 4845 11704 4806 11754
      4817 11775
TIME...MOT...LOC 2317Z 219DEG 37KT 4820 11755

$$

CARTER

1 follow-up statement

148 
WWUS56 KOTX 252356
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
456 PM PDT MON JUL 25 2011

WAC051-065-252359-
/O.CAN.KOTX.SV.W.0003.000000T0000Z-110726T0000Z/
PEND OREILLE WA-STEVENS WA-
456 PM PDT MON JUL 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL STEVENS AND
CENTRAL PEND OREILLE COUNTIES IS CANCELLED...

DOPPLER RADAR INDICATED THE STORM WAS NO LONGER SHOWING SIGNS OF
BEING SEVERE AND THE WARNING WAS ALLOWED TO EXPIRE. THE STORM WILL
CONTINUE TO MOVE NORTHEAST INTO THE NORTHERN IDAHO PANHANDLE
HOWEVER WITH WIND GUSTS TO 45 MPH POSSIBLE AND HAIL UP TO THREE
QUARTERS OF AN INCH IN DIAMETER.

LAT...LON 4867 11727 4863 11705 4845 11704 4806 11754
      4817 11775
TIME...MOT...LOC 2349Z 219DEG 37KT 4846 11724

$$

CARTER

Nearby

Severe Thunderstorm Warnings in Washington, 2011 Every severe thunderstorm warning in 2011

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.