Alert archive / Washington / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 21, NWS Spokane, WA

August 8, 2008Asotin County, Washington; Nez Perce County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at Aug 8, 2008, 4:51 PM PDT for Asotin County, Washington; Nez Perce County, Idaho. It was in force for 39 min. 3 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 8, 2008, 4:51 PM PDT (23:51 UTC)
Expired: Aug 8, 2008, 5:30 PM PDT
In force: 39 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon

Counties Nez Perce County, ID, Asotin County, WA

The radar

The Pendleton radar (KPDT), 132 km from the middle of the area, began a volume at 23:54 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 8, 5:23 PM PDT	HAIL 0.88	Asotin, WA	NICKLE SIZED HAIL REPORTED IN ASOTIN FROM 523PM TO 545 PM. SPOTTER ASOTIN 9.
Aug 8, 5:30 PM PDT	HAIL 0.75	2 N Grand Coulee, WA	DELAYED REPORT FROM AUGUST 8TH. SMALL TREES DOWNED. HEAVY RAIN RESULTED IN MUDSLIDES ACROSS SEVERAL LOCAL ROADS WITH DAMAGE REPORTED. YARD OBJECTS DAMAGED/BLOWN AWAY.
Aug 8, 5:30 PM PDT	HAIL 0.75	8 S Anatone, WA	DELAYED REPORT FROM AUGUST 8TH. SMALL TREES DOWNED. HEAVY RAIN RESULTED IN MUDSLIDES ACROSS SEVERAL LOCAL ROADS WITH DAMAGE REPORTED. YARD OBJECTS DAMAGED/BLOWN AWAY.

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, 11.9 hours before the alert went out and 186 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: 2448 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 107 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.

000 
WUUS56 KOTX 082351
SVROTX
IDC069-WAC003-090030-
/O.NEW.KOTX.SV.W.0021.080808T2351Z-080809T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
451 PM PDT FRI AUG 8 2008

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL NEZ PERCE COUNTY IN NORTH CENTRAL IDAHO...
  ASOTIN COUNTY IN SOUTHEAST WASHINGTON...

* UNTIL 530 PM PDT

* AT 449 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER
  SOUTH CENTRAL ASOTIN COUNTY...OR 27 MILES SOUTHWEST OF LEWISTON...
  AND MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ANATONE BY 510 PM PDT...
  8 MILES SOUTHWEST OF WAHA BY 530 PM PDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4609 11746 4612 11743 4612 11742 4614 11742
      4641 11718 4629 11672 4599 11704 4599 11732
TIME...MOT...LOC 2351Z 231DEG 17KT 4604 11721

$$

FRIES

1 follow-up statement

000 
WWUS56 KOTX 090015
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
515 PM PDT FRI AUG 8 2008

IDC069-WAC003-090030-
/O.CON.KOTX.SV.W.0021.000000T0000Z-080809T0030Z/
NEZ PERCE ID-ASOTIN WA-
515 PM PDT FRI AUG 8 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM PDT
FOR ASOTIN AND WEST CENTRAL NEZ PERCE COUNTIES...

AT 510 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ANATONE...OR 21 MILES SOUTH OF LEWISTON...MOVING
NORTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  8 MILES SOUTHWEST OF WAHA BY 530 PM PDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4609 11746 4612 11743 4612 11742 4614 11742
      4641 11718 4629 11672 4599 11704 4599 11732
TIME...MOT...LOC 0015Z 231DEG 17KT 4611 11708

$$

FRIES

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 4:00 PM PDT	Severe Thunderstorm Warning	OTX	Chelan	45 min
Aug 8, 4:32 PM PDT	Flash Flood Warning	OTX	Chelan	88 min

Nearby

Severe Thunderstorm Warnings in Washington, 2008 Severe Thunderstorm Warnings in Idaho, 2008 Every severe thunderstorm warning in 2008

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.