Alert archive / California / Flash Flood Watches in 2018
Flash Flood Watch 3, NWS Eureka, CA
NWS Eureka, CA issued this flash flood watch at Nov 27, 2018, 2:04 PM PST for Mendocino County, California. It took effect at Nov 28, 2018, 10:00 PM PST. It was in force for 18 hr.
The area
The counties it named.
The facts
- Issued
- Nov 27, 2018, 2:04 PM PST (22:04 UTC)
- In effect from
- Nov 28, 2018, 10:00 PM PST
- Expired
- Nov 29, 2018, 4:00 PM PST
- In force
- 18 hr
- Issued by
- NWS Eureka, CA
- Flood severity
- None
County Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 139 km from the middle of the area, began a volume at 22:07 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
Oakland, CA (KOAK), launched 12:00Z, 10.1 hours before the alert went out and 218 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
- 916 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
370 WGUS66 KEKA 272204 FFAEKA URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Eureka CA 204 PM PST Tue Nov 27 2018 CAZ107-110-113-280615- /O.NEW.KEKA.FF.A.0003.181129T0600Z-181129T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Northwestern Mendocino Interior- Southeastern Mendocino Interior- 204 PM PST Tue Nov 27 2018 ...FLASH FLOOD WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY MORNING FOR THE CARR, DELTA, AND MENDOCINO COMPLEX WILDFIRE BURN AREAS... The National Weather Service in Eureka has issued a * Flash Flood Watch for a portion of northwest California, including the Carr and Delta burn areas in Northern Trinity County, and the Mendocino Complex burn area in Northwestern Mendocino Interior and Southeastern Mendocino Interior. * From Wednesday evening through Thursday morning. * Flash floods and debris flows will be a particular threat in the wildfire burn areas mentioned above. Heavy rainfall at times is possible over the burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
7 follow-up statements
377 WGUS66 KEKA 280613 FFAEKA Flood Watch National Weather Service Eureka CA 1013 PM PST Tue Nov 27 2018 CAZ107-110-113-281415- /O.CON.KEKA.FF.A.0003.181129T0600Z-181129T1800Z/ /00000.0.OT.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Northwestern Mendocino Interior- Southeastern Mendocino Interior- 1013 PM PST Tue Nov 27 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY MORNING FOR THE CARR, DELTA, AND MENDOCINO COMPLEX WILDFIRE BURN AREAS... The Flash Flood Watch continues for * Flash Flood Watch for a portion of northwest California, including the Carr and Delta burn areas in Northern Trinity County, and the Mendocino Complex burn area in Northwestern Mendocino Interior and Southeastern Mendocino Interior. * From Wednesday evening through Thursday morning * Flash floods and debris flows will be a particular threat in the wildfire burn areas mentioned above. Heavy rainfall at times is possible over the burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
827 WGUS66 KEKA 281139 FFAEKA Flood Watch National Weather Service Eureka CA 339 AM PST Wed Nov 28 2018 CAZ107-110-113-282315- /O.CON.KEKA.FF.A.0003.181129T0600Z-181129T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Northwestern Mendocino Interior- Southeastern Mendocino Interior- 339 AM PST Wed Nov 28 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING FOR THE CARR, DELTA, AND MENDOCINO COMPLEX WILDFIRE BURN AREAS... The Flash Flood Watch continues for * Flash Flood Watch for a portion of northwest California, including the Carr and Delta burn areas in Northern Trinity County, and the Mendocino Complex burn area in Northwestern Mendocino Interior and Southeastern Mendocino Interior. * From this evening through Thursday morning * Flash floods and debris flows will be a particular threat in the wildfire burn areas mentioned above. Heavy rainfall at times is possible over the burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
795 WGUS66 KEKA 282224 FFAEKA Flood Watch National Weather Service Eureka CA 224 PM PST Wed Nov 28 2018 CAZ107-110-113-290630- /O.CON.KEKA.FF.A.0003.181129T0600Z-181129T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Northwestern Mendocino Interior- Southeastern Mendocino Interior- 224 PM PST Wed Nov 28 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING FOR THE CARR, DELTA, AND MENDOCINO COMPLEX WILDFIRE BURN AREAS... The Flash Flood Watch continues for * Flash Flood Watch for a portion of northwest California, including the Carr and Delta burn areas in Northern Trinity County, and the Mendocino Complex burn area in Northwestern Mendocino Interior and Southeastern Mendocino Interior. * From this evening through Thursday morning * Flash floods and debris flows will be a particular threat in the wildfire burn areas mentioned above. Heavy rainfall at times is possible over the burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
752 WGUS66 KEKA 290648 FFAEKA Flood Watch National Weather Service Eureka CA 1048 PM PST Wed Nov 28 2018 CAZ107-110-113-291500- /O.CON.KEKA.FF.A.0003.000000T0000Z-181129T1800Z/ /00000.0.OT.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Northwestern Mendocino Interior- Southeastern Mendocino Interior- 1048 PM PST Wed Nov 28 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE CARR, DELTA, AND MENDOCINO COMPLEX WILDFIRE BURN AREAS... The Flash Flood Watch continues for * Flash Flood Watch for a portion of northwest California, including the Carr and Delta burn areas in Northern Trinity County, and the Mendocino Complex burn area in Northwestern Mendocino Interior and Southeastern Mendocino Interior. * Until 10 AM PST Thursday * Flash floods and debris flows will be a particular threat in the wildfire burn areas mentioned above. Heavy rainfall at times is possible over the burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
570 WGUS66 KEKA 291118 FFAEKA Flood Watch National Weather Service Eureka CA 318 AM PST Thu Nov 29 2018 CAZ107-110-113-291800- /O.CON.KEKA.FF.A.0003.000000T0000Z-181129T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Northwestern Mendocino Interior- Southeastern Mendocino Interior- 318 AM PST Thu Nov 29 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING FOR THE CARR, DELTA, AND MENDOCINO COMPLEX WILDFIRE BURN AREAS... The Flash Flood Watch continues for * Flash Flood Watch for a portion of northwest California, including the Carr and Delta burn areas in Northern Trinity County, and the Mendocino Complex burn area in Northwestern Mendocino Interior and Southeastern Mendocino Interior. * Until 10 AM PST Thursday * Flash floods and debris flows will be a particular threat in the wildfire burn areas mentioned above. Heavy rainfall at times is possible over the burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
668 WGUS66 KEKA 291611 FFAEKA URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Eureka CA 811 AM PST Thu Nov 29 2018 CAZ107-110-113-300000- /O.EXT.KEKA.FF.A.0003.000000T0000Z-181130T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Northwestern Mendocino Interior- Southeastern Mendocino Interior- 811 AM PST Thu Nov 29 2018 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 4 PM PST THIS AFTERNOON FOR THE CARR, DELTA, AND MENDOCINO COMPLEX WILDFIRE BURN AREAS... The Flash Flood Watch is now in effect for * Flash Flood Watch for a portion of northwest California, including the Carr and Delta burn areas in Northern Trinity County, and the Mendocino Complex burn area in Northwestern Mendocino Interior and Southeastern Mendocino Interior. * Until 4 PM PST this afternoon * Flash floods and debris flows due to heavy rain will be a particular threat in the wildfire burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
687 WGUS66 KEKA 300004 FFAEKA Flood Watch National Weather Service Eureka CA 404 PM PST Thu Nov 29 2018 CAZ107-110-113-300115- /O.EXP.KEKA.FF.A.0003.000000T0000Z-181130T0000Z/ /00000.0.OT.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Trinity-Northwestern Mendocino Interior- Southeastern Mendocino Interior- 404 PM PST Thu Nov 29 2018 ...FLASH FLOOD WATCH HAS EXPIRED... The Flash Flood Watch for a portion of northwest California including the Carr and Delta burn areas in Northern Trinity County, and the Mendocino Complex burn area in Northwestern Mendocino Interior and Southeastern Mendocino Interior has expired. Light rain showers will remain possible over these areas through this evening. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 26, 9:00 PM PST | High Surf Advisory | EKA | Del Norte, Humboldt, Mendocino | 38 hr |
| Nov 27, 10:10 AM PST | Gale Watch | EKA | 17 hr | |
| Nov 27, 2:10 PM PST | Wind Advisory | EKA | Mendocino | 56 hr |
Nearby
Flash Flood Watches in California, 2018Every flash flood watch in 2018
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.