Alert archive / California / Flood Watches in 2021
Flood Watch 1, NWS Eureka, CA
NWS Eureka, CA issued this flood watch at Jan 11, 2021, 1:24 PM PST for Del Norte County, California. It took effect at Jan 12, 2021, 12:00 AM PST. It was in force for 32 hr.
The area
The counties it named.
The facts
- Issued
- Jan 11, 2021, 1:24 PM PST (21:24 UTC)
- In effect from
- Jan 12, 2021, 12:00 AM PST
- Expired
- Jan 13, 2021, 8:27 AM PST
- In force
- 32 hr
- Issued by
- NWS Eureka, CA
- Flood severity
- None
County Del Norte County, CA
The radar
The Medford radar (KMAX), 109 km from the middle of the area, began a volume at 21:24 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
Medford/Jackson, OR (KMFR), launched 12:00Z, 9.4 hours before the alert went out and 118 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
- 685 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
625 WGUS66 KEKA 112124 FFAEKA URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Eureka CA 124 PM PST Mon Jan 11 2021 CAZ101-102-120930- /O.NEW.KEKA.FA.A.0001.210112T0800Z-210113T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior- 124 PM PST Mon Jan 11 2021 ...FLOOD WATCH IN EFFECT FROM MIDNIGHT TONIGHT THROUGH WEDNESDAY MORNING... The National Weather Service in Eureka has issued a * Flood Watch for a portion of northwest California, including the following areas, Coastal Del Norte and Del Norte Interior. * From Midnight PST tonight through Wednesday morning * A front will move into the area tonight and stall Tuesday and early Wednesday accompanied by an atmospheric river. This will bring a prolonged period of moderate to heavy rain to the area. * Small streams and creeks will see significant rises and may overflow their banks. Rock slides are possible along mountain roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. Monitor the latest forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ SEC
7 follow-up statements
248 WGUS66 KEKA 112142 FFAEKA Flood Watch National Weather Service Eureka CA 142 PM PST Mon Jan 11 2021 CAZ101-102-120545- /O.CON.KEKA.FA.A.0001.210112T0800Z-210113T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior- 142 PM PST Mon Jan 11 2021 ...FLOOD WATCH REMAINS IN EFFECT FROM MIDNIGHT PST TONIGHT THROUGH WEDNESDAY MORNING... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte and Del Norte Interior. * From Midnight PST tonight through Wednesday morning * A front will move into the area tonight and stall Tuesday and early Wednesday accompanied by an atmospheric. This will bring a prolonged period of moderate to heavy rain to the area. * Small streams and creeks will see significant rises and may overflow their banks. Rock slides are possible along mountain roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ SEC
999 WGUS66 KEKA 120546 FFAEKA Flood Watch National Weather Service Eureka CA 946 PM PST Mon Jan 11 2021 CAZ101-102-121400- /O.CON.KEKA.FA.A.0001.210112T0800Z-210113T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior- 946 PM PST Mon Jan 11 2021 ...FLOOD WATCH IN EFFECT FROM MIDNIGHT TONIGHT THROUGH WEDNESDAY MORNING... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte and Del Norte Interior. * Through Wednesday morning * A front will move into the area tonight and stall Tuesday and early Wednesday accompanied by an atmospheric. This will bring a prolonged period of moderate to heavy rain to the area. * Small streams and creeks will see significant rises and may overflow their banks. Rock slides are possible along mountain roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. Monitor the latest forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ TDJ
768 WGUS66 KEKA 121357 FFAEKA Flood Watch National Weather Service Eureka CA 557 AM PST Tue Jan 12 2021 CAZ101-102-122200- /O.CON.KEKA.FA.A.0001.000000T0000Z-210113T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior- 557 AM PST Tue Jan 12 2021 ...FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY MORNING... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte and Del Norte Interior. * Through Wednesday morning * A front will stall over the area today. This will bring a prolonged period of moderate to heavy rain to the area through Wednesday morning, with 4 to 6 inches possible across Del Norte County. * Small streams and creeks will see significant rises and may overflow their banks. Rock slides are possible along mountain roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ CB
506 WGUS66 KEKA 122155 FFAEKA Flood Watch National Weather Service Eureka CA 155 PM PST Tue Jan 12 2021 CAZ101-102-130600- /O.CON.KEKA.FA.A.0001.000000T0000Z-210113T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior- 155 PM PST Tue Jan 12 2021 ...FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY MORNING... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte and Del Norte Interior. * Through Wednesday morning * A front will stall over the area today. This will bring a continued period of moderate to heavy rain to the area through Wednesday morning. Rainfall amounts of 2 to 3 inches have already occurred across portions of the area. Storm total rainfall of 4 to 6 inches is possible. Locally higher amounts are possible, particularly on south-facing terrain. * Small streams and creeks will see significant rises and may overflow their banks. Rock slides are possible along mountain roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ SEC
364 WGUS66 KEKA 130546 FFAEKA Flood Watch National Weather Service Eureka CA 946 PM PST Tue Jan 12 2021 CAZ101-102-131415- /O.CON.KEKA.FA.A.0001.000000T0000Z-210113T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior- 946 PM PST Tue Jan 12 2021 ...FLOOD WATCH IN EFFECT FROM MIDNIGHT TONIGHT THROUGH WEDNESDAY MORNING... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte and Del Norte Interior. * Through Wednesday morning * A front will move across the area tonight. This will bring a continued period of moderate to heavy rain to the area through Wednesday morning. Rainfall amounts of 2 to 5 inches have already occurred across portions of the area. Storm total rainfall of 4 to 6 inches is possible. Locally higher amounts are possible, particularly on south-facing terrain. * Small streams and creeks will see significant rises and may overflow their banks. Rock slides are possible along mountain roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. Monitor the latest forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ TDJ
702 WGUS66 KEKA 131357 FFAEKA Flood Watch National Weather Service Eureka CA 557 AM PST Wed Jan 13 2021 CAZ101-102-132000- /O.CON.KEKA.FA.A.0001.000000T0000Z-210113T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior- 557 AM PST Wed Jan 13 2021 ...FLOOD WATCH REMAINS IN EFFECT UNTIL NOON PST TODAY... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte and Del Norte Interior. * Until Noon PST today * Light rain will continue into this morning. 4 to 6 inches of rain has already fallen across Del Norte County. * Small streams and creeks will see significant rises and may overflow their banks. Standing water will be possible in poor drainage areas. Rock slides are possible along mountain roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ CB/EYS
779 WGUS66 KEKA 131627 FFAEKA Flood Watch National Weather Service Eureka CA 827 AM PST Wed Jan 13 2021 CAZ101-102-131730- /O.CAN.KEKA.FA.A.0001.000000T0000Z-210113T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior- 827 AM PST Wed Jan 13 2021 ...FLOOD WATCH IS CANCELLED... The Flood Watch for a portion of northwest California, including the following areas, Coastal Del Norte and Del Norte Interior has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ JJW
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 10, 8:53 PM PST | Small Craft Advisory | EKA | 36 hr | |
| Jan 11, 2:03 AM PST | Gale Warning | EKA | 49 hr | |
| Jan 11, 2:03 AM PST | Hazardous Seas Watch | EKA | 12 hr | |
| Jan 11, 5:42 AM PST | Wind Advisory | EKA | Del Norte, Humboldt | 39 hr |
| Jan 11, 2:17 PM PST | Coastal Flood Advisory | EKA | Del Norte, Humboldt | 22 hr |
| Jan 11, 2:17 PM PST | High Surf Advisory | EKA | Del Norte, Humboldt, Mendocino | 40 hr |
| Jan 11, 2:19 PM PST | Hazardous Seas Warning | EKA | 37 hr |
Nearby
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.