Alert archive / Washington / Special Weather Statements in 2021
Special Weather Statement, NWS Spokane, WA
NWS Spokane, WA issued this special weather statement at Aug 3, 2021, 8:12 PM PDT for Okanogan County, Washington. It was in force for 78 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
- Aug 3, 2021, 8:12 PM PDT (03:12 UTC)
- Expired
- Aug 3, 2021, 9:30 PM PDT
- In force
- 78 min
- Issued by
- NWS Spokane, WA
County Okanogan County, WA
The radar
The Spokane radar (KOTX), 170 km from the middle of the area, began a volume at 03:13 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, 3.2 hours before the alert went out and 247 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
- 631 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 3157 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
198 WWUS86 KOTX 040312 SPSOTX Special Weather Statement National Weather Service Spokane WA 812 PM PDT Tue Aug 3 2021 WAZ038-042-043-040430- East Slopes Northern Cascades WA-Okanogan Valley WA- Okanogan Highlands WA- 812 PM PDT Tue Aug 3 2021 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL FERRY AND NORTHEASTERN OKANOGAN COUNTIES UNTIL 930 PM PDT... At 810 PM PDT, Doppler radar was tracking strong thunderstorms along a line extending from 17 miles northwest of Omak to near Nespelem Community. Movement was northeast at 20 mph. Half inch hail and wind gusts up to 50 mph will be possible with these storms. Spotters have also reported some damage to small structures and tree limbs and small trees. Locations impacted include... Omak, Okanogan, Tonasket, North Omak, Riverside, Conconully, Disautel, Salmon Meadows Campground, Loomis, Alder Campground, Ellisforde and Synarep. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4895 11971 4848 11868 4817 11912 4855 11995 TIME...MOT...LOC 0310Z 216DEG 17KT 4859 11979 4824 11912 $$ COTE
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 6:13 PM PDT | Special Weather Statement | OTX | Douglas | 62 min |
| Aug 3, 6:17 PM PDT | Special Weather Statement | OTX | 73 min | |
| Aug 3, 6:58 PM PDT | Special Weather Statement | OTX | Douglas | 62 min |
| Aug 4, 1:53 PM PDT | Red Flag Warning | OTX | 31 hr | |
| Aug 3, 10:57 PM PDT | Special Weather Statement | OTX | Latah | 48 min |
Nearby
Special Weather Statements in Washington, 2021Every special weather statement 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.