Alert archive / Washington / Flash Flood Watches in 2021
Flash Flood Watch 4, NWS Spokane, WA
NWS Spokane, WA issued this flash flood watch at Aug 16, 2021, 2:29 PM PDT for Ferry County, Pend Oreille County, Stevens County, Washington; Bonner County, Boundary County, Idaho. It took effect at Aug 17, 2021, 10:00 AM PDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Aug 16, 2021, 2:29 PM PDT (21:29 UTC)
- In effect from
- Aug 17, 2021, 10:00 AM PDT
- Expired
- Aug 17, 2021, 9:00 PM PDT
- In force
- 11 hr
- Issued by
- NWS Spokane, WA
- Flood severity
- None
Counties Bonner County, ID, Boundary County, ID, Ferry County, WA, Pend Oreille County, WA, Stevens County, WA
The radar
The Spokane radar (KOTX), 93 km from the middle of the area, began a volume at 21:29 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, 9.5 hours before the alert went out and 113 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
- 3445 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
514 WGUS66 KOTX 162129 FFAOTX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Spokane WA 229 PM PDT Mon Aug 16 2021 IDC017-021-WAC051-065-171500- /O.NEW.KOTX.FF.A.0004.210817T1700Z-210818T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bonner-Boundary-Pend Oreille-Stevens- Including the cities of Porthill, Eastport, Sandpoint, Clark Fork, Diamond Lake, Colville, Blanchard, Northport, Bonners Ferry, Metaline Falls, Chewelah, Cusick, Moyie Springs, Careywood, Ione, Newport, Kettle Falls, Springdale, Naples, and Priest River 229 PM PDT Mon Aug 16 2021 ...FLASH FLOOD WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... The National Weather Service in Spokane has issued a * Flash Flood Watch for Portions of North Idaho, including the following areas, Bonner and Boundary. Portions of Northeast Washington, including the following areas, Pend Oreille and Stevens. * From Tuesday morning through Tuesday evening. * Slow moving thunderstorms will be capable of producing locally heavy rainfall over parts of the far north Idaho Panhandle and the mountainous terrain of far northeast Washington. * Locally heavy rain over steep terrain and recently burned areas heighten the risk of flash flooding and debris flows. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ GKOCH
2 follow-up statements
998 WGUS66 KOTX 171344 FFAOTX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Spokane WA 644 AM PDT Tue Aug 17 2021 WAC019-180400- /O.EXA.KOTX.FF.A.0004.210817T1700Z-210818T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Ferry- Including the cities of Laurier, Keller, Curlew, Republic, Danville, and Inchelium 644 AM PDT Tue Aug 17 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 10 AM PDT THIS MORNING THROUGH THIS EVENING... The National Weather Service in Spokane has expanded the * Flash Flood Watch to include A portion of Northeast Washington, including the following area, Ferry. * From 10 AM PDT this morning through this evening. * Slow moving thunderstorms will be capable of producing locally heavy rainfall over parts of the far north Idaho Panhandle and the mountainous terrain of far northeast Washington. * Locally heavy rain over steep terrain and recently burned areas heighten the risk of flash flooding and debris flows. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ IDC017-021-WAC051-065-180400- /O.CON.KOTX.FF.A.0004.210817T1700Z-210818T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bonner-Boundary-Pend Oreille-Stevens- Including the cities of Porthill, Eastport, Sandpoint, Clark Fork, Diamond Lake, Colville, Blanchard, Northport, Bonners Ferry, Metaline Falls, Chewelah, Cusick, Moyie Springs, Careywood, Ione, Newport, Kettle Falls, Springdale, Naples, and Priest River 644 AM PDT Tue Aug 17 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 10 AM PDT THIS MORNING THROUGH THIS EVENING... The Flash Flood Watch continues for * Portions of North Idaho, including the following areas, Bonner and Boundary. Portions of Northeast Washington, including the following areas, Pend Oreille and Stevens. * From 10 AM PDT this morning through this evening. * Slow moving thunderstorms will be capable of producing locally heavy rainfall over parts of the far north Idaho Panhandle and the mountainous terrain of far northeast Washington. * Locally heavy rain over steep terrain and recently burned areas heighten the risk of flash flooding and debris flows. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ SB
618 WGUS66 KOTX 180354 FFAOTX Flood Watch National Weather Service Spokane WA 854 PM PDT Tue Aug 17 2021 IDC017-021-WAC019-051-065-180500- /O.EXP.KOTX.FF.A.0004.000000T0000Z-210818T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bonner-Boundary-Ferry-Pend Oreille-Stevens- Including the cities of Porthill, Laurier, Chewelah, Blanchard, Republic, Danville, Naples, Eastport, Cusick, Colville, Northport, Bonners Ferry, Springdale, Kettle Falls, Sandpoint, Clark Fork, Diamond Lake, Ione, Newport, Priest River, Curlew, Careywood, Keller, Moyie Springs, Metaline Falls, and Inchelium 854 PM PDT Tue Aug 17 2021 ...FLASH FLOOD WATCH WILL EXPIRE AT 9 PM PDT THIS EVENING... The Flash Flood Watch for Portions of North Idaho, including the following areas, Bonner and Boundary. Portions of Northeast Washington, including the following areas, Ferry, Pend Oreille and Stevens. will expire at 9 PM PDT this evening. Flooding is no longer expected to pose a threat. $$ SVH
Nearby
Flash Flood Watches in Washington, 2021Flash Flood Watches in Idaho, 2021Every flash flood 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.