Alert archive / Washington / Tornado Warnings in 2021

Tornado Warning 5, NWS Seattle, WA

November 9, 2021Kitsap County, Washington

NWS Seattle, WA issued this tornado warning at Nov 9, 2021, 11:59 AM PST for Kitsap County, Washington. It was in force for 17 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: Nov 9, 2021, 11:59 AM PST (19:59 UTC)
Expired: Nov 9, 2021, 12:16 PM PST
In force: 17 min
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Kitsap County, WA

The radar

The Seattle radar (KATX), 56 km from the middle of the area, began a volume at 19:58 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

Quillayute State, WA (KUIL), launched 12:00Z, 8.0 hours before the alert went out and 146 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: 599 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 887 m²/s²
0-3 km storm-relative helicity: 1203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

906 
WFUS56 KSEW 091959
TORSEW
WAC035-092030-
/O.NEW.KSEW.TO.W.0005.211109T1959Z-211109T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Seattle WA
1159 AM PST Tue Nov 9 2021

The National Weather Service in Seattle has issued a

* Tornado Warning for...
  East central Kitsap County in northwestern Washington...

* Until 1230 PM PST
    
* At 1159 AM PST, a severe thunderstorm capable of producing a
  tornado was located near Poulsbo, or near Bremerton, moving
  northeast at 30 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught 
           without shelter. Mobile homes will be damaged or 
           destroyed. Damage to roofs, windows, and vehicles will 
           occur.  Tree damage is likely. 

* This tornadic thunderstorm will remain over mainly rural areas of
  east central Kitsap County, including the following locations:
  Bainbridge Island, Indianola, Suquamish, Silverdale and Kingston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4775 12254 4773 12255 4771 12251 4764 12251
      4763 12258 4765 12259 4765 12262 4763 12259
      4762 12268 4769 12271 4772 12266 4770 12262
      4766 12261 4767 12256 4771 12256 4769 12259
      4773 12264 4780 12251 4775 12247
TIME...MOT...LOC 1959Z 246DEG 27KT 4765 12266 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

PULLIN

1 follow-up statement

072 
WWUS56 KSEW 092016
SVSSEW

Severe Weather Statement
National Weather Service Seattle WA
1216 PM PST Tue Nov 9 2021

WAC035-092026-
/O.CAN.KSEW.TO.W.0005.000000T0000Z-211109T2030Z/
Kitsap-
1216 PM PST Tue Nov 9 2021

...THE TORNADO WARNING FOR EAST CENTRAL KITSAP COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 4775 12254 4773 12255 4771 12251 4764 12251
      4763 12258 4765 12259 4765 12262 4763 12259
      4762 12268 4769 12271 4772 12266 4770 12262
      4766 12261 4767 12256 4771 12256 4769 12259
      4773 12264 4780 12251 4775 12247
TIME...MOT...LOC 2015Z 246DEG 27KT 4770 12248 

$$

PULLIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 8, 10:15 PM PST	River Flood Warning	SEW	Mason	46 hr
Nov 9, 12:15 AM PST	Gale Warning	SEW		20 hr
Nov 9, 12:15 AM PST	Storm Warning	SEW		7 hr
Nov 9, 1:50 AM PST	High Wind Warning	SEW	San Juan	8 hr
Nov 9, 4:04 AM PST	Special Weather Statement	SEW	Clallam	26 min
Nov 9, 6:29 AM PST	Special Weather Statement	SEW	Island	46 min
Nov 9, 7:17 AM PST	Special Weather Statement	SEW	Skagit, Whatcom	28 min
Nov 9, 11:15 AM PST	Special Weather Statement	SEW	Grays Harbor	45 min
Nov 9, 11:23 AM PST	Special Marine Warning	SEW		52 min
Nov 9, 11:40 AM PST	Tornado Warning	SEW	Kitsap	35 min
Nov 9, 12:01 PM PST	Special Marine Warning	SEW		44 min
Nov 9, 12:24 PM PST	Special Weather Statement	SEW	Mason	51 min
Nov 9, 12:58 PM PST	Special Weather Statement	SEW	Clallam	32 min
Nov 9, 1:36 PM PST	Special Weather Statement	SEW	Kitsap	39 min
Nov 9, 1:52 PM PST	Special Weather Statement	SEW	Grays Harbor	38 min
Nov 9, 2:00 PM PST	Severe Thunderstorm Warning	SEW	Grays Harbor, Mason	30 min
Nov 9, 2:14 PM PST	Special Weather Statement	SEW	Snohomish	46 min
Nov 9, 2:27 PM PST	Severe Thunderstorm Warning	SEW	Mason, Thurston	33 min
Nov 9, 2:38 PM PST	Special Weather Statement	SEW	Kitsap	37 min
Nov 9, 2:41 PM PST	Special Marine Warning	SEW		28 min
Nov 9, 2:50 PM PST	Special Weather Statement	SEW	Grays Harbor	25 min

Nearby

Tornado Warnings in Washington, 2021 Every tornado warning in 2021 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.