Alert archive / Idaho / Flash Flood Watches in 2021
Flash Flood Watch 3, NWS Spokane, WA
NWS Spokane, WA issued this flash flood watch at Jul 31, 2021, 2:01 PM PDT for Chelan County, Okanogan County, Washington; 5 counties in Idaho. It took effect at Aug 1, 2021, 6:00 AM PDT. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Jul 31, 2021, 2:01 PM PDT (21:01 UTC)
- In effect from
- Aug 1, 2021, 6:00 AM PDT
- Expired
- Aug 2, 2021, 2:46 AM PDT
- In force
- 21 hr
- Issued by
- NWS Spokane, WA
- Flood severity
- None
Counties Benewah County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Shoshone County, ID, Chelan County, WA, Okanogan County, WA
The radar
The Spokane radar (KOTX), 54 km from the middle of the area, began a volume at 21:05 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, 9.0 hours before the alert went out and 103 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
- 3394 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
440 WGUS66 KOTX 312101 FFAOTX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Spokane WA 201 PM PDT Sat Jul 31 2021 .Thunderstorms producing torrential rain may lead to flash flooding on Sunday especially over and near burn scars. WAC007-047-011415- /O.NEW.KOTX.FF.A.0003.210801T1300Z-210802T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chelan-Okanogan- Including the cities of Omak, Winthrop, Manson, Brewster, Plain, Leavenworth, Methow, Okanogan, Twisp, Mazama, Oroville, Cashmere, Chelan, Conconully, Entiat, and Wenatchee 201 PM PDT Sat Jul 31 2021 ...FLASH FLOOD WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY AFTERNOON... The National Weather Service in Spokane has issued a * Flash Flood Watch for A portion of North Central Washington, including the following areas, Chelan and Okanogan. * From Sunday morning through Sunday afternoon. * Thunderstorms with torrential rain combined with steep terrain and/or previously fire burned areas could result in dangerous flash flooding. * Sudden rushes of water in creek and stream drainages could wash away any person or thing nearby. Debris flows can cause additional damage to low lying bridges or other structures. Road washouts are common in flash flood events. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ IDC009-057-061-069-079-011415- /O.NEW.KOTX.FF.A.0003.210801T1900Z-210802T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Benewah-Latah-Lewis-Nez Perce-Shoshone- Including the cities of Winchester, Osburn, Nezperce, Kamiah, Juliaetta, St Maries, Wallace, Tensed, Moscow, Deary, Kellogg, Calder, Peck, Mullan, Smelterville, Craigmont, Lapwai, Kendrick, Culdesac, Lewiston, Potlatch, Plummer, Gifford, Genesee, and Pinehurst 201 PM PDT Sat Jul 31 2021 ...FLASH FLOOD WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE SUNDAY NIGHT... The National Weather Service in Spokane has issued a * Flash Flood Watch for Portions of North and North Central Idaho, including the following areas, in North Idaho, Benewah, Latah and Shoshone. In North Central Idaho, Lewis and Nez Perce. * From Sunday afternoon through late Sunday night. * Thunderstorms with torrential rain combined with steep terrain and/or previously fire burned areas could result in dangerous flash flooding. * Sudden rushes of water in creek and stream drainages could wash away any person or thing nearby. Debris flows can cause additional damage to low lying bridges or other structures. Road washouts are common in flash flood events PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JW
3 follow-up statements
934 WGUS66 KOTX 011246 FFAOTX Flood Watch National Weather Service Spokane WA 546 AM PDT Sun Aug 1 2021 .Thunderstorms producing torrential rain may lead to flash flooding on Sunday especially over and near burn scars. WAC007-047-020000- /O.CON.KOTX.FF.A.0003.210801T1300Z-210802T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chelan-Okanogan- Including the cities of Omak, Winthrop, Manson, Brewster, Plain, Leavenworth, Methow, Okanogan, Twisp, Mazama, Oroville, Cashmere, Chelan, Conconully, Entiat, and Wenatchee 546 AM PDT Sun Aug 1 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON... The Flash Flood Watch continues for * A portion of North Central Washington, including the following areas, Chelan and Okanogan. * Until 5 PM PDT this afternoon. * Thunderstorms with torrential rain combined with steep terrain and/or previously fire burned areas could result in dangerous flash flooding. * Sudden rushes of water in creek and stream drainages could wash away any person or thing nearby. Debris flows can cause additional damage to low lying bridges or other structures. Road washouts are common in flash flood events. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ IDC009-057-061-069-079-020015- /O.CON.KOTX.FF.A.0003.210801T1900Z-210802T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Benewah-Latah-Lewis-Nez Perce-Shoshone- Including the cities of Winchester, Osburn, Nezperce, Kamiah, Juliaetta, St Maries, Wallace, Tensed, Moscow, Deary, Kellogg, Calder, Peck, Mullan, Smelterville, Craigmont, Lapwai, Kendrick, Culdesac, Lewiston, Potlatch, Plummer, Gifford, Genesee, and Pinehurst 546 AM PDT Sun Aug 1 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM NOON PDT TODAY THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of North and North Central Idaho, including the following areas, in North Idaho, Benewah, Latah and Shoshone. In North Central Idaho, Lewis and Nez Perce. * From Noon PDT today through late tonight. * Thunderstorms with torrential rain combined with steep terrain and/or previously fire burned areas could result in dangerous flash flooding. * Sudden rushes of water in creek and stream drainages could wash away any person or thing nearby. Debris flows can cause additional damage to low lying bridges or other structures. Road washouts are common in flash flood events PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JS
160 WGUS66 KOTX 012248 FFAOTX Flood Watch National Weather Service Spokane WA 348 PM PDT Sun Aug 1 2021 WAC007-047-020000- /O.CAN.KOTX.FF.A.0003.000000T0000Z-210802T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chelan-Okanogan- Including the cities of Omak, Winthrop, Manson, Brewster, Plain, Leavenworth, Methow, Okanogan, Twisp, Mazama, Oroville, Cashmere, Chelan, Conconully, Entiat, and Wenatchee 348 PM PDT Sun Aug 1 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for a portion of North Central Washington, including Chelan and Okanogan counties, has been cancelled. The Flash Flood Watch is cancelled. Flooding is no longer expected to pose a threat. $$ IDC009-057-061-069-079-021200- /O.CON.KOTX.FF.A.0003.000000T0000Z-210802T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Benewah-Latah-Lewis-Nez Perce-Shoshone- Including the cities of Winchester, Osburn, Nezperce, Kamiah, Juliaetta, St Maries, Wallace, Tensed, Moscow, Deary, Kellogg, Calder, Peck, Mullan, Smelterville, Craigmont, Lapwai, Kendrick, Culdesac, Lewiston, Potlatch, Plummer, Gifford, Genesee, and Pinehurst 348 PM PDT Sun Aug 1 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of North and North Central Idaho, including the following areas, in North Idaho, Benewah, Latah and Shoshone. In North Central Idaho, Lewis and Nez Perce. * Through late tonight. * Thunderstorms with torrential rain combined with steep terrain and/or previously fire burned areas could result in dangerous flash flooding. * Sudden rushes of water in creek and stream drainages could wash away any person or thing nearby. Debris flows can cause additional damage to low lying bridges or other structures. Road washouts are common in flash flood events. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ vmt
645 WGUS66 KOTX 020946 FFAOTX Flood Watch National Weather Service Spokane WA 246 AM PDT Mon Aug 2 2021 IDC009-057-061-069-079-021100- /O.CAN.KOTX.FF.A.0003.000000T0000Z-210802T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Benewah-Latah-Lewis-Nez Perce-Shoshone- Including the cities of Winchester, Osburn, Nezperce, Kamiah, Juliaetta, St Maries, Wallace, Tensed, Moscow, Deary, Kellogg, Calder, Peck, Mullan, Smelterville, Craigmont, Lapwai, Kendrick, Culdesac, Lewiston, Potlatch, Plummer, Gifford, Genesee, and Pinehurst 246 AM PDT Mon Aug 2 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for Portions of North and North Central Idaho, including the following areas, in North Idaho, Benewah, Latah and Shoshone. In North Central Idaho, Lewis and Nez Perce. has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ AB
Nearby
Flash Flood Watches in Idaho, 2021Flash Flood Watches in Washington, 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.