Alert archive / Washington / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 2, NWS Spokane, WA

May 12, 2007Pend Oreille County, Spokane County, Stevens County, Washington; Bonner County, Kootenai County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at May 12, 2007, 8:45 PM PDT for Pend Oreille County, Spokane County, Stevens County, Washington; Bonner County, Kootenai County, Idaho. It was in force for 30 min. 1 report 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: May 12, 2007, 8:45 PM PDT (03:45 UTC)
Expired: May 12, 2007, 9:15 PM PDT
In force: 30 min
Issued by: NWS Spokane, WA
Area: Counties, with a storm outline in the text

Counties Bonner County, ID, Kootenai County, ID, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA

The radar

The Spokane radar (KOTX), 34 km from the middle of the area, began a volume at 03:48 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
May 12, 9:00 PM PDT	TSTM WND GST 58	Diamond Lake, WA	58 MPH WIND GUST REPORTED BY NWS SPOTTER.

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, 3.8 hours before the alert went out and 72 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: 3297 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 111 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 130345
SVROTX
IDC017-055-WAC051-063-065-130415-
/O.NEW.KOTX.SV.W.0002.070513T0345Z-070513T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
845 PM PDT SAT MAY 12 2007

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN SPOKANE COUNTY IN EASTERN WASHINGTON...
  SOUTHERN PEND OREILLE COUNTY IN NORTHEAST WASHINGTON...
  SOUTHEASTERN STEVENS COUNTY IN NORTHEAST WASHINGTON...
  SOUTHWESTERN BONNER COUNTY IN THE PANHANDLE OF IDAHO...
  NORTHWESTERN KOOTENAI COUNTY IN THE PANHANDLE OF IDAHO...
  THIS INCLUDES THE CITIES OF...RATHDRUM...POST FALLS...HAYDEN...

* UNTIL 915 PM PDT

* AT 842 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR CHATTAROY...OR ABOUT 14
  MILES NORTHEAST OF SPOKANE...AND MOVING NORTHEAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HAUSER...SPIRIT LAKE AND ATHOL

LAT...LON 4770 11770 4765 11683 4812 11662 4815 11726
      4813 11778

$$
BT

2 follow-up statements

000 
WWUS56 KOTX 130356
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
855 PM PDT SAT MAY 12 2007

IDC017-055-WAC051-063-065-130415-
/O.CON.KOTX.SV.W.0002.000000T0000Z-070513T0415Z/
BONNER ID-PEND OREILLE WA-STEVENS WA-KOOTENAI ID-SPOKANE WA-
855 PM PDT SAT MAY 12 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM PDT
FOR NORTHERN SPOKANE...NORTHWESTERN KOOTENAI...SOUTHEASTERN
STEVENS...SOUTHERN PEND OREILLE AND SOUTHWESTERN BONNER COUNTIES...

AT 848 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR MILAN...OR ABOUT 19
MILES NORTH OF SPOKANE...MOVING NORTHEAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
RATHDRUM...HAYDEN...DIAMOND LAKE...CHILCO...BLANCHARD...SPIRIT
LAKE...LACLEDE AND ATHOL

LAT...LON 4770 11770 4765 11683 4812 11662 4815 11726
      4813 11778

$$

BT

000 
WWUS56 KOTX 130416
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
916 PM PDT SAT MAY 12 2007

IDC017-055-WAC051-063-065-130426-
/O.EXP.KOTX.SV.W.0002.000000T0000Z-070513T0415Z/
BONNER ID-PEND OREILLE WA-STEVENS WA-KOOTENAI ID-SPOKANE WA-
916 PM PDT SAT MAY 12 2007

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SPOKANE...
NORTHWESTERN KOOTENAI...SOUTHEASTERN STEVENS...SOUTHERN PEND OREILLE
AND SOUTHWESTERN BONNER COUNTIES EXPIRES AT 915 PM PDT...

LAT...LON 4770 11770 4765 11683 4812 11662 4815 11726
      4813 11778

$$

BT-

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 8:22 PM PDT	Severe Thunderstorm Warning	OTX	Spokane	23 min

Nearby

Severe Thunderstorm Warnings in Washington, 2007 Severe Thunderstorm Warnings in Idaho, 2007 Every severe thunderstorm warning in 2007

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.