Alert archive / Washington / High Wind Watches in 2020
High Wind Watch 7, NWS Seattle, WA
NWS Seattle, WA issued this high wind watch at Nov 15, 2020, 4:28 PM PST for San Juan County, Washington. It took effect at Nov 17, 2020, 7:00 AM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Nov 15, 2020, 4:28 PM PST (00:28 UTC)
- In effect from
- Nov 17, 2020, 7:00 AM PST
- Expired
- Nov 16, 2020, 3:40 AM PST
- In force
- Issued by
- NWS Seattle, WA
County San Juan County, WA
The radar
The Seattle radar (KATX), 54 km from the middle of the area, began a volume at 00:27 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 00:00Z, 0.5 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.
- Mixed-layer CAPE
- 79 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 882 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this high wind watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Seattle, WA wrote its last area forecast discussion before this high wind watch went out at Nov 15, 4:10 PM PST, 18 minutes earlier.
Area forecast discussion, Nov 15, 4:10 PM PST, 18 minutes before
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</html>The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 15, 8:47 PM PST | Gale Watch | SEW | 6 hr | |
| Nov 16, 2:52 AM PST | Gale Watch | SEW | 17 hr | |
| Nov 16, 3:40 AM PST | High Wind Warning | SEW | San Juan | 37 hr |
| Nov 16, 11:05 AM PST | Flood Watch | SEW | Mason | 29 hr |
| Nov 16, 2:40 PM PST | Coastal Flood Advisory | SEW | 25 hr | |
| Nov 16, 3:55 PM PST | Wind Advisory | SEW | 24 hr |
Nearby
High Wind Watches in Washington, 2020Every high wind watch in 2020
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.