Alert archive / Washington / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 2, NWS Spokane, WA

May 4, 20164 counties in Washington

NWS Spokane, WA issued this severe thunderstorm warning at May 4, 2016, 11:04 PM PDT for 4 counties in Washington. It was in force for 41 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: May 4, 2016, 11:04 PM PDT (06:04 UTC)
Expired: May 4, 2016, 11:45 PM PDT
In force: 41 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon

Counties Lincoln County, WA, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA

The radar

The Spokane radar (KOTX), 48 km from the middle of the area, began a volume at 06:06 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 00:00Z, 6.1 hours before the alert went out and 127 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: 2192 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

164 
WUUS56 KOTX 050604
SVROTX
WAC043-051-063-065-050645-
/O.NEW.KOTX.SV.W.0002.160505T0604Z-160505T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
1104 PM PDT WED MAY 4 2016

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN LINCOLN COUNTY IN EASTERN WASHINGTON...
  SOUTHERN STEVENS COUNTY IN NORTHEASTERN WASHINGTON...
  NORTHERN SPOKANE COUNTY IN NORTHEASTERN WASHINGTON...
  SOUTHEASTERN PEND OREILLE COUNTY IN NORTHEASTERN WASHINGTON...

* UNTIL 1145 PM PDT

* AT 1104 PM PDT...THE PUBLIC REPORTED A LINE OF SEVERE THUNDERSTORMS
  PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 11 MILES EAST OF DAVENPORT TO
  GREEN ACRES...AND MOVING NORTH AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SPOKANE...NINE MILE FALLS...DEER PARK...TOWN AND COUNTRY...FAIRWOOD...
  COUNTRY HOMES...SUNCREST...CHATTAROY...OTIS ORCHARDS-EAST FARMS...MEAD...
  TRENTWOOD...SPRINGDALE...ELK...MOUNT SPOKANE...FORD...MILAN...COLBERT...
  WELLPINIT...MILES AND LITTLE FALLS DAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

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 LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

&&

LAT...LON 4817 11704 4770 11704 4774 11836 4783 11838
      4788 11834 4797 11834 4803 11840 4805 11836
      4804 11828 4807 11823 4813 11825 4815 11820
      4821 11818
TIME...MOT...LOC 0604Z 201DEG 34KT 4770 11792 4768 11714 

$$

MF

1 follow-up statement

958 
WWUS56 KOTX 050648
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1148 PM PDT WED MAY 4 2016

WAC043-051-063-065-050658-
/O.EXP.KOTX.SV.W.0002.000000T0000Z-160505T0645Z/
LINCOLN WA-STEVENS WA-SPOKANE WA-PEND OREILLE WA-
1148 PM PDT WED MAY 4 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LINCOLN...
SOUTHERN STEVENS...NORTHERN SPOKANE AND SOUTHEASTERN PEND OREILLE
COUNTIES HAS EXPIRED...
            
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4817 11704 4770 11704 4774 11836 4783 11838
      4788 11834 4797 11834 4803 11840 4805 11836
      4804 11828 4807 11823 4813 11825 4815 11820
      4821 11818
TIME...MOT...LOC 0645Z 201DEG 34KT 4770 11792 4768 11714 

$$

MF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 10:12 PM PDT	Special Weather Statement	OTX	Spokane	63 min
May 4, 10:26 PM PDT	Severe Thunderstorm Warning	OTX	Lincoln, Spokane	49 min
May 4, 11:51 PM PDT	Special Weather Statement	OTX	Stevens	54 min
May 5, 12:13 AM PDT	Areal Flood Advisory	OTX	Stevens	7 hr
May 5, 1:17 AM PDT	Areal Flood Advisory	OTX	Pend Oreille	6 hr

Nearby

Severe Thunderstorm Warnings in Washington, 2016 Every severe thunderstorm warning in 2016

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.