Alert archive / Washington / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS Spokane, WA

June 13, 2021Stevens County, Washington

NWS Spokane, WA issued this severe thunderstorm warning at Jun 13, 2021, 7:45 PM PDT for Stevens County, Washington. 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: Jun 13, 2021, 7:45 PM PDT (02:45 UTC)
Expired: Jun 13, 2021, 8:15 PM PDT
In force: 30 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Stevens County, WA

The radar

The Spokane radar (KOTX), 105 km from the middle of the area, began a volume at 02:44 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
Jun 13, 7:55 PM PDT	HAIL 0.5	5 Ene Evans, WA

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, 2.8 hours before the alert went out and 154 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: 218 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 2524 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 284 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

578 
WUUS56 KOTX 140245
SVROTX
WAC065-140315-
/O.NEW.KOTX.SV.W.0001.210614T0245Z-210614T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Spokane WA
745 PM PDT Sun Jun 13 2021

The National Weather Service in Spokane has issued a

* Severe Thunderstorm Warning for...
  North central Stevens County in northeastern Washington...

* Until 815 PM PDT.

* At 744 PM PDT, a severe thunderstorm was located near Colville, or
  54 miles northwest of Priest River, moving north at 60 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Colville, Kettle Falls, Marble and Evans. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4839 11797 4841 11808 4891 11802 4889 11783
TIME...MOT...LOC 0244Z 186DEG 50KT 4851 11800 

HAIL...1.00IN
WIND...<50MPH
 
$$

JCLEV

2 follow-up statements

543 
WWUS56 KOTX 140259
SVSOTX

Severe Weather Statement
National Weather Service Spokane WA
759 PM PDT Sun Jun 13 2021

WAC065-140315-
/O.CON.KOTX.SV.W.0001.000000T0000Z-210614T0315Z/
Stevens WA-
759 PM PDT Sun Jun 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM PDT
FOR NORTH CENTRAL STEVENS COUNTY...

At 758 PM PDT, a severe thunderstorm was located 11 miles north of
Colville, or 60 miles northwest of Priest River, moving north at 60
mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Kettle Falls, Marble and Evans. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4857 11793 4860 11805 4891 11802 4889 11783
TIME...MOT...LOC 0258Z 186DEG 50KT 4871 11797 

HAIL...1.00IN
WIND...60MPH
 
$$

JCLEV

564 
WWUS56 KOTX 140312
SVSOTX

Severe Weather Statement
National Weather Service Spokane WA
812 PM PDT Sun Jun 13 2021

WAC065-140321-
/O.EXP.KOTX.SV.W.0001.000000T0000Z-210614T0315Z/
Stevens WA-
812 PM PDT Sun Jun 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL STEVENS COUNTY
WILL EXPIRE AT 815 PM PDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However small hail and gusty winds are still
possible with this thunderstorm.

LAT...LON 4857 11793 4860 11805 4891 11802 4889 11783
TIME...MOT...LOC 0311Z 186DEG 50KT 4886 11795 

$$

JCLEV

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 7:31 PM PDT	Special Weather Statement	OTX	Stevens	44 min
Jun 13, 7:50 PM PDT	Special Weather Statement	OTX	Douglas	40 min
Jun 13, 8:10 PM PDT	Areal Flood Advisory	OTX	Chelan, Douglas	65 min
Jun 13, 8:29 PM PDT	Special Weather Statement	OTX	Douglas	31 min
Jun 13, 8:48 PM PDT	Special Weather Statement	OTX	Stevens	27 min
Jun 13, 9:00 PM PDT	Special Weather Statement	OTX	Okanogan	30 min
Jun 13, 9:16 PM PDT	Special Weather Statement	OTX	Douglas	29 min
Jun 13, 9:34 PM PDT	Special Weather Statement	OTX	Ferry	41 min
Jun 13, 9:47 PM PDT	Special Weather Statement	OTX	Okanogan	28 min
Jun 13, 10:13 PM PDT	Special Weather Statement	OTX	Ferry	32 min
Jun 13, 10:38 PM PDT	Special Weather Statement	OTX	Ferry	37 min
Jun 13, 11:15 PM PDT	Special Weather Statement	OTX	Okanogan	30 min

Nearby

Severe Thunderstorm Warnings in Washington, 2021 Every severe thunderstorm warning in 2021

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.