Alert archive / California / Flood Watches in 2021
Flood Watch 4, NWS Eureka, CA
NWS Eureka, CA issued this flood watch at Feb 1, 2021, 5:16 AM PST for Del Norte County, Humboldt County, Trinity County, California. It took effect at Feb 1, 2021, 10:00 AM PST. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Feb 1, 2021, 5:16 AM PST (13:16 UTC)
- In effect from
- Feb 1, 2021, 10:00 AM PST
- Expired
- Feb 1, 2021, 8:18 PM PST
- In force
- 10 hr
- Issued by
- NWS Eureka, CA
- Flood severity
- None
Counties Del Norte County, CA, Humboldt County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 80 km from the middle of the area, began a volume at 13:16 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, 1.3 hours before the alert went out and 165 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
- 1410 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 233 m²/s²
- 0-3 km storm-relative helicity
- 467 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
328 WGUS66 KEKA 011316 FFAEKA URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Eureka CA 516 AM PST Mon Feb 1 2021 CAZ101-102-104>106-108-012130- /O.CAN.KEKA.FA.A.0003.000000T0000Z-210202T1200Z/ /O.NEW.KEKA.FA.A.0004.210201T1800Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior-Southern Humboldt Interior- Southern Trinity- 516 AM PST Mon Feb 1 2021 ...FLOOD WATCH IN EFFECT FROM 10 AM PST THIS MORNING THROUGH LATE TONIGHT... The National Weather Service in Eureka has issued a * Flood Watch for a portion of northwest California, including the following areas, Coastal Del Norte, Del Norte Interior, Northern Humboldt Interior, Southern Humboldt Interior, Southern Trinity, and Southwestern Humboldt. * From 10 AM PST this morning through late tonight * A total of 2 to 4 inches of additional rain is expected through Monday night across the area. Heavy rain combined with saturated soil (and melting snow across the mountains) will contribute toward possible flooding. * Low lying areas, creeks, streams, culverts, and portions of urban areas may experience flooding due to heavy rainfall. 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. && $$
2 follow-up statements
088 WGUS66 KEKA 012047 FFAEKA Flood Watch National Weather Service Eureka CA 1247 PM PST Mon Feb 1 2021 CAZ101-102-104>106-108-020500- /O.CON.KEKA.FA.A.0004.000000T0000Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Southwestern Humboldt-Northern Humboldt Interior-Southern Humboldt Interior-Southern Trinity- 1247 PM PST Mon Feb 1 2021 ...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte, Del Norte Interior, Northern Humboldt Interior, Southern Humboldt Interior, Southern Trinity and Southwestern Humboldt. * Through late tonight * A total of 2 to 4 inches of additional rainfall will be possible through Monday night. Heavy rain combined with saturated soil and melting snow across the mountains will contribute toward possible flooding. * Low lying areas, creeks, streams, and culverts may experience flooding due to heavy rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ JMG
380 WGUS66 KEKA 020418 FFAEKA Flood Watch National Weather Service Eureka CA 818 PM PST Mon Feb 1 2021 CAZ101-102-104>106-108-020530- /O.CAN.KEKA.FA.A.0004.000000T0000Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Southwestern Humboldt-Northern Humboldt Interior-Southern Humboldt Interior-Southern Trinity- 818 PM PST Mon Feb 1 2021 ...FLOOD WATCH IS CANCELLED... The Flood Watch for a portion of northwest California, including the following areas, Coastal Del Norte, Del Norte Interior, Northern Humboldt Interior, Southern Humboldt Interior, Southern Trinity and Southwestern Humboldt has been cancelled. The heaviest rain has exited the area. Flooding is no longer expected to pose a threat. Light rain showers will continue overnight into Tuesday morning. $$ CB
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 1, 2:15 PM PST | Gale Watch | EKA | 16 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.