Alert archive / Washington / Tornado Warnings in 2021

Tornado Warning 1, NWS Seattle, WA

March 19, 2021Jefferson County, Washington

NWS Seattle, WA issued this tornado warning at Mar 19, 2021, 5:02 AM PDT for Jefferson County, Washington. It was in force for 13 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
Mar 19, 2021, 5:02 AM PDT (12:02 UTC)
Expired
Mar 19, 2021, 5:15 AM PDT
In force
13 min
Issued by
NWS Seattle, WA
Area
Storm-based polygon
Tornado
Radar indicated

County Jefferson County, WA

The radar

The Langley Hill radar (KLGX), 68 km from the middle of the area, began a volume at 12:01 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, 0.0 hours before the alert went out and 29 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-pSkew-T log-p diagram, Quillayute State, WA at 12:00Z on 2021-03-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 87 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Quillayute State, WA at 12:00Z on 2021-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 344 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
87 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
585 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
344 m²/s²
0-3 km storm-relative helicity
336 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

446 
WFUS56 KSEW 191202
TORSEW
WAC031-191215-
/O.NEW.KSEW.TO.W.0001.210319T1202Z-210319T1215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Seattle WA
502 AM PDT Fri Mar 19 2021

The National Weather Service in Seattle has issued a

* Tornado Warning for...
  Southwestern Jefferson County in northwestern Washington...

* Until 515 AM PDT
    
* At 501 AM PDT, a severe thunderstorm capable of producing a tornado
  was located near Queets, moving north at 35 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Expect damage to mobile homes, roofs, and vehicles. 

* This tornadic thunderstorm will remain over mainly rural areas of
  southwestern Jefferson County.

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 or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4787 12442 4783 12411 4754 12429 4755 12436
      4761 12438 4765 12439 4768 12441 4774 12443
TIME...MOT...LOC 1201Z 194DEG 29KT 4762 12434 

TORNADO...RADAR INDICATED
HAIL...<.75

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 19, 3:15 AM PDTSmall Craft AdvisorySEW3 days
Mar 19, 4:53 AM PDTSpecial Weather StatementSEWClallam22 min
Mar 19, 5:56 AM PDTSpecial Weather StatementSEWGrays Harbor34 min
Mar 19, 6:53 AM PDTSpecial Marine WarningSEW37 min
Mar 19, 7:03 AM PDTSpecial Marine WarningSEW27 min
Mar 19, 7:21 AM PDTSpecial Weather StatementSEW24 min
Mar 19, 7:27 AM PDTSpecial Marine WarningSEW18 min
Mar 19, 7:45 AM PDTSpecial Marine WarningSEW30 min
Mar 19, 7:53 AM PDTTornado WarningSEWClallam, Jefferson22 min
Mar 19, 8:12 AM PDTSpecial Weather StatementSEWClallam18 min
Mar 19, 8:13 AM PDTTornado WarningSEWGrays Harbor, Jefferson17 min
Mar 19, 8:38 AM PDTGale WatchSEW6 hr
Mar 19, 8:42 AM PDTSpecial Marine WarningSEW33 min
Mar 19, 9:15 AM PDTSpecial Marine WarningSEW30 min
Mar 19, 9:45 AM PDTSpecial Marine WarningSEW30 min
Mar 19, 10:15 AM PDTSpecial Marine WarningSEW60 min
Mar 19, 1:08 PM PDTSpecial Marine WarningSEW37 min
Mar 19, 2:12 PM PDTSpecial Marine WarningSEW48 min
Mar 19, 2:39 PM PDTGale WarningSEW33 hr
Mar 19, 2:55 PM PDTSpecial Marine WarningSEW65 min
Mar 19, 3:18 PM PDTSpecial Marine WarningSEW27 min
Mar 19, 3:41 PM PDTSpecial Marine WarningSEW25 min

Nearby

Tornado Warnings in Washington, 2021Every tornado warning in 2021Tornadoes 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.