Alert archive / Washington / Winter Storm Watches in 2021
Winter Storm Watch 2, NWS Spokane, WA
NWS Spokane, WA issued this winter storm watch at Jan 3, 2021, 5:45 AM PST for Ferry County, Okanogan County, Washington. It took effect at Jan 3, 2021, 10:00 PM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jan 3, 2021, 5:45 AM PST (13:45 UTC)
- In effect from
- Jan 3, 2021, 10:00 PM PST
- Expired
- Jan 3, 2021, 3:11 PM PST
- In force
- Issued by
- NWS Spokane, WA
Counties Ferry County, WA, Okanogan County, WA
The radar
The Spokane radar (KOTX), 145 km from the middle of the area, began a volume at 13:48 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 12:00Z, 1.8 hours before the alert went out and 222 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 727 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 508 m²/s²
- 0-3 km storm-relative helicity
- 487 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
594 WWUS46 KOTX 031345 WSWOTX URGENT - WINTER WEATHER MESSAGE National Weather Service Spokane WA 545 AM PST Sun Jan 3 2021 ...MORE SNOW ON MONDAY AFTER PANHANDLE SNOW WINDS DOWN TODAY... Lookout Pass will continue to see heavy snow through mid morning with snow dissipating through the late morning hours. There will be a break between weather systems this afternoon into this evening. Another weather system moves in tonight with temperatures expected to be colder at onset of precipitation. Valleys in north-central Washington are expected to see snow with heavy accumulations possible for the east slopes of the northern Cascades and Okanogan Highlands. WAZ042-032145- /O.CAN.KOTX.WW.Y.0001.000000T0000Z-210103T1800Z/ /O.NEW.KOTX.WS.A.0002.210104T0600Z-210105T0300Z/ East Slopes Northern Cascades- Including the following locations Leavenworth, Mazama, Twisp, Winthrop, Stehekin, Conconully, Blewett Pass, Loup Loup Pass, Stevens Pass, Plain, and Holden Village 545 AM PST Sun Jan 3 2021 ...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH MONDAY EVENING... ...WINTER WEATHER ADVISORY IS CANCELLED... * WHAT...Heavy snow possible. Total snow accumulations of 6 to 10 inches possible in the valleys and 10 to 20 inches possible for the mountains. * WHERE...Mazama, Twisp, Winthrop, Stehekin, Conconully, Blewett Pass, Loup Loup Pass, Stevens Pass, Plain, and Holden Village. * WHEN...From this evening through Monday evening. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow is expected to switch over to rain in the Wenatchee River Valley up to Leavenworth by Monday afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ IDZ004-032000- /O.CON.KOTX.WS.W.0001.000000T0000Z-210103T2000Z/ Central Panhandle Mountains- Including the following locations Lookout Pass 545 AM PST Sun Jan 3 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PST TODAY ABOVE 4000 FEET... * WHAT...Heavy snow above 4000 feet. Additional snow accumulations of 2 to 6 inches. Winds gusting as high as 40 mph. * WHERE...Lookout Pass. * WHEN...Until noon PST today. * IMPACTS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WAZ038-032145- /O.NEW.KOTX.WS.A.0002.210104T0800Z-210105T0300Z/ Okanogan Highlands- Including the following locations Republic, Wauconda, Chesaw Road, Highway 20 Wauconda Summit, Boulder Creek Road, and Sherman Pass 545 AM PST Sun Jan 3 2021 ...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH MONDAY EVENING... * WHAT...Heavy snow possible. Total snow accumulations of 5 to 10 inches possible. * WHERE...Republic, Wauconda, Chesaw Road, Highway 20 Wauconda Summit, Boulder Creek Road, and Sherman Pass. * WHEN...From late tonight through Monday evening. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow is expected to switch over to rain north along Highway 21 from Keller to Republic through the day on Monday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$
2 follow-up statements
705 WWUS46 KOTX 031933 WSWOTX URGENT - WINTER WEATHER MESSAGE National Weather Service Spokane WA 1133 AM PST Sun Jan 3 2021 ...MORE HEAVY SNOW FOR THE MOUNTAINS...THE METHOW VALLEY...AND THE OKANOGAN HIGHLANDS MONDAY... IDZ004-032045- /O.CAN.KOTX.WS.W.0001.000000T0000Z-210103T2000Z/ Central Panhandle Mountains- 1133 AM PST Sun Jan 3 2021 ...WINTER STORM WARNING IS CANCELLED... Any additional snow accumulations for the mountains of the central Idaho Panhandle will be minimal this afternoon. More snow will arrive on Monday and continue into Monday night. $$ WAZ042-040000- /O.CON.KOTX.WS.A.0002.210104T0600Z-210105T0300Z/ East Slopes Northern Cascades- Including the following locations Leavenworth, Mazama, Twisp, Winthrop, Stehekin, Conconully, Blewett Pass, Loup Loup Pass, Stevens Pass, Plain, and Holden Village 1133 AM PST Sun Jan 3 2021 ...WINTER STORM WATCH REMAINS IN EFFECT FROM 10 PM PST THIS EVENING THROUGH MONDAY EVENING... * WHAT...Heavy snow possible. Total snow accumulations of 6 to 10 inches possible in the valleys and 10 to 20 inches possible for the mountains. * WHERE...Mazama, Twisp, Winthrop, Stehekin, Conconully, Blewett Pass, Loup Loup Pass, Stevens Pass, Plain, and Holden Village. * WHEN...From this evening through Monday evening. * IMPACTS...Motorists should plan for winter driving conditions Monday into Monday evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ WAZ038-040000- /O.CON.KOTX.WS.A.0002.210104T0800Z-210105T0300Z/ Okanogan Highlands- Including the following locations Republic, Wauconda, Chesaw Road, Highway 20 Wauconda Summit, Boulder Creek Road, and Sherman Pass 1133 AM PST Sun Jan 3 2021 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH MONDAY EVENING... * WHAT...Heavy snow possible. Total snow accumulations of 5 to 10 inches possible. * WHERE...Republic, Wauconda, Chesaw Road, Highway 20 Wauconda Summit, Boulder Creek Road, and Sherman Pass. * WHEN...From late tonight through Monday evening. * IMPACTS...Motorists should plan for winter driving conditions Monday into Monday evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$
612 WWUS46 KOTX 032311 WSWOTX URGENT - WINTER WEATHER MESSAGE National Weather Service Spokane WA 311 PM PST Sun Jan 3 2021 ...MORE HEAVY SNOW FOR THE MOUNTAINS...THE METHOW VALLEY...AND THE OKANOGAN HIGHLANDS MONDAY... WAZ038-041330- /O.UPG.KOTX.WS.A.0002.210104T0800Z-210105T0300Z/ /O.NEW.KOTX.WS.W.0002.210104T1000Z-210105T0300Z/ Okanogan Highlands- Including the following locations Republic, Wauconda, Chesaw Road, Highway 20 Wauconda Summit, Boulder Creek Road, and Sherman Pass 311 PM PST Sun Jan 3 2021 ...WINTER STORM WARNING IN EFFECT FROM 2 AM TO 7 PM PST MONDAY... * WHAT...Heavy snow expected. Total snow accumulations of 3 to 6 inches valleys above 2500 feet. Mountain accumulations of 6 to 10 inches. * WHERE...Republic, Wauconda, Chesaw Road, Highway 20 Wauconda Summit, Boulder Creek Road, and Sherman Pass. * WHEN...From 2 AM to 7 PM PST Monday. * IMPACTS...Motorists should plan for winter driving conditions Monday into Monday evening. * ADDITIONAL DETAILS...Snow will likely change to rain over southern portions of Ferry county early in the morning and the change to rain will spread into the valleys of central and northern portions of the Okanogan Highland during the day. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WAZ042-041330- /O.UPG.KOTX.WS.A.0002.210104T0600Z-210105T0300Z/ /O.NEW.KOTX.WS.W.0002.210104T0800Z-210105T0300Z/ East Slopes Northern Cascades- Including the following locations Mazama, Twisp, Winthrop, Stehekin, Conconully, Blewett Pass, Loup Loup Pass, Stevens Pass, Plain, and Holden Village 311 PM PST Sun Jan 3 2021 ...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 7 PM PST MONDAY... * WHAT...Heavy snow expected. Total snow accumulations of 6 to 9 inches in the valleys. Accumulations of 10 to 18 inches for the mountains. * WHERE...Mazama, Twisp, Winthrop, Stehekin, Conconully, Blewett Pass, Loup Loup Pass, Stevens Pass, Plain, and Holden Village. * WHEN...From midnight tonight to 7 PM PST Monday. * IMPACTS...Motorists should plan for winter driving conditions Monday into Monday evening. Over a foot of new snow will be likely for Stevens Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WAZ041-043-044-041330- /O.NEW.KOTX.WW.Y.0002.210104T1000Z-210104T2000Z/ Wenatchee Area-Okanogan Valley-Waterville Plateau- Including the following locations Number 1 Canyon, Number 2 Canyon, Nespelem, Disautel Pass, Waterville, Mansfield, and Badger Mountain Road 311 PM PST Sun Jan 3 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 2 AM TO NOON PST MONDAY... * WHAT...Snow expected. Total snow accumulations of up to 3 inches. * WHERE...Number 1 Canyon, Number 2 Canyon, Nespelem, Disautel Pass, Waterville, Mansfield, and Badger Mountain Road. * WHEN...From 2 AM to noon PST Monday. * ELEVATION...Accumulations less than an inch are likely for elevations below 2000 feet around Wenatchee, Chelan, and Brewster. Slushy accumulations of an inch or two will be possible around Omak and Oroville below 2000 feet. * IMPACTS...Motorists should plan for winter driving conditions Monday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ001-WAZ037-041330- /O.NEW.KOTX.WW.Y.0002.210104T1200Z-210104T2000Z/ Northern Panhandle-Northeast Mountains- Including the following locations Priest River, Eastport, Schweitzer Mountain Road, Newport, Springdale-Hunters Road, Orin-Rice Road, and Flowery Trail Road 311 PM PST Sun Jan 3 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO NOON PST MONDAY ABOVE 2000 FEET... * WHAT...Snow expected above 2000 feet. Total snow accumulations of up to 3 inches valleys. Accumulations of 6 to 12 inches mountains. * WHERE...Priest River, Eastport, Schweitzer Mountain Road, Newport, Springdale-Hunters Road, Orin-Rice Road, and Flowery Trail Road. * WHEN...From 4 AM to noon PST Monday. * IMPACTS...Motorists should plan for winter driving conditions Monday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 3, 3:11 PM PST | Winter Storm Warning | OTX | Ferry, Okanogan | 28 hr |
| Jan 3, 3:11 PM PST | Winter Weather Advisory | OTX | Chelan, Douglas, Grant, Okanogan, Pend Oreille, Spokane and 1 more | 21 hr |
| Jan 3, 3:56 PM PST | Flash Flood Watch | OTX | Whitman | 31 hr |
Nearby
Winter Storm Watches in Washington, 2021Every winter storm watch 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.