Alert archive / California / Flood Watches in 2021
Flood Watch 2, NWS Eureka, CA
NWS Eureka, CA issued this flood watch at Jan 29, 2021, 4:52 PM PST for 4 counties in California. It took effect at Jan 30, 2021, 10:00 PM PST. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Jan 29, 2021, 4:52 PM PST (00:52 UTC)
- In effect from
- Jan 30, 2021, 10:00 PM PST
- Expired
- Jan 31, 2021, 4:28 AM PST
- In force
- 6 hr
- Issued by
- NWS Eureka, CA
- Flood severity
- None
Counties Del Norte County, CA, Humboldt County, CA, Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 60 km from the middle of the area, began a volume at 00:51 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 00:00Z, 0.9 hours before the alert went out and 204 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
- 953 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
402 WGUS66 KEKA 300052 FFAEKA URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Eureka CA 452 PM PST Fri Jan 29 2021 .A warm and moist air mass will spread across northwest California Saturday night through Monday night. A long duration of heavy rain will be possible as a result. CAZ101>106-108>113-300900- /O.NEW.KEKA.FA.A.0002.210131T0600Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior-Southern Humboldt Interior-Southern Trinity-Mendocino Coast-Northwestern Mendocino Interior-Northeastern Mendocino Interior-Southwestern Mendocino Interior-Southeastern Mendocino Interior- 452 PM PST Fri Jan 29 2021 ...FLOOD WATCH IN EFFECT FROM SATURDAY EVENING THROUGH LATE MONDAY NIGHT... 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, Mendocino Coast, Northeastern Mendocino Interior, Northern Humboldt Coast, Northern Humboldt Interior, Northwestern Mendocino Interior, Southeastern Mendocino Interior, Southern Humboldt Interior, Southern Trinity, Southwestern Humboldt and Southwestern Mendocino Interior. * From Saturday evening through late Monday night * Three to five inches of rain is expected Saturday night through Monday night across most coastal and valley locations, with higher amounts from six to nine inches possible across southwest facing mountains and ridges. 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. && $$ JMG
6 follow-up statements
361 WGUS66 KEKA 300558 FFAEKA Flood Watch National Weather Service Eureka CA 958 PM PST Fri Jan 29 2021 .A warm and moist air mass will spread across northwest California Saturday night through Monday night. A long duration of heavy rain will be possible as a result. CAZ101>106-108>113-301400- /O.CON.KEKA.FA.A.0002.210131T0600Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior-Southern Humboldt Interior-Southern Trinity-Mendocino Coast-Northwestern Mendocino Interior-Northeastern Mendocino Interior-Southwestern Mendocino Interior-Southeastern Mendocino Interior- 958 PM PST Fri Jan 29 2021 ...FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY EVENING THROUGH LATE MONDAY NIGHT... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte, Del Norte Interior, Mendocino Coast, Northeastern Mendocino Interior, Northern Humboldt Coast, Northern Humboldt Interior, Northwestern Mendocino Interior, Southeastern Mendocino Interior, Southern Humboldt Interior, Southern Trinity, Southwestern Humboldt and Southwestern Mendocino Interior. * From Saturday evening through late Monday night * Three to five inches of rain is expected Saturday night through Monday night across coastal and valley locations, with higher amounts from six to nine inches possible across southwest facing mountains and ridges. 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. && $$ JMG
391 WGUS66 KEKA 300703 FFAEKA Flood Watch National Weather Service Eureka CA 1103 PM PST Fri Jan 29 2021 .A warm and moist air mass will spread across northwest California Saturday night through Monday night. A long duration of heavy rain will be possible as a result. CAZ101>106-108>113-301515- /O.CON.KEKA.FA.A.0002.210131T0600Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior-Southern Humboldt Interior-Southern Trinity-Mendocino Coast-Northwestern Mendocino Interior-Northeastern Mendocino Interior-Southwestern Mendocino Interior-Southeastern Mendocino Interior- 1103 PM PST Fri Jan 29 2021 ...FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY EVENING THROUGH LATE MONDAY NIGHT... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte, Del Norte Interior, Mendocino Coast, Northeastern Mendocino Interior, Northern Humboldt Coast, Northern Humboldt Interior, Northwestern Mendocino Interior, Southeastern Mendocino Interior, Southern Humboldt Interior, Southern Trinity, Southwestern Humboldt and Southwestern Mendocino Interior. * From Saturday evening through late Monday night * Three to five inches of rain is expected Saturday night through Monday night across coastal and valley locations, with higher amounts from six to nine inches possible across southwest facing mountains and ridges. 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. && $$ JMG
039 WGUS66 KEKA 301341 FFAEKA Flood Watch National Weather Service Eureka CA 541 AM PST Sat Jan 30 2021 .A warm and moist air mass will spread across northwest California Saturday night through Monday night. A long duration of heavy rain will be possible as a result. CAZ101>106-108>113-302145- /O.CON.KEKA.FA.A.0002.210131T0600Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior-Southern Humboldt Interior-Southern Trinity-Mendocino Coast-Northwestern Mendocino Interior-Northeastern Mendocino Interior-Southwestern Mendocino Interior-Southeastern Mendocino Interior- 541 AM PST Sat Jan 30 2021 ...FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH LATE MONDAY NIGHT... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte, Del Norte Interior, Mendocino Coast, Northeastern Mendocino Interior, Northern Humboldt Coast, Northern Humboldt Interior, Northwestern Mendocino Interior, Southeastern Mendocino Interior, Southern Humboldt Interior, Southern Trinity, Southwestern Humboldt and Southwestern Mendocino Interior. * From this evening through late Monday night * Three to five inches of rain is expected Saturday night through Monday night across coastal and valley locations, with higher amounts from six to nine inches possible across southwest facing mountains and ridges. 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. && $$ JJW
399 WGUS66 KEKA 302211 FFAEKA URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Eureka CA 211 PM PST Sat Jan 30 2021 .An atmospheric river will focus near the northwest California coast much of Sunday and Monday, before shifting eastward across our area with a cold front late Monday or Monday night. Periods of moderate to heavy rainfall will result, on top of areas where soils have been saturated from recent rains, and heavy snowpack is present. The focus of the heavier rain has shifted a bit farther north and west though, lowering the threat for much of Mendocino County. CAZ112-113-302315- /O.CAN.KEKA.FA.A.0002.210131T0600Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southwestern Mendocino Interior-Southeastern Mendocino Interior- 211 PM PST Sat Jan 30 2021 ...FLOOD WATCH IS CANCELLED... The Flood Watch for a portion of northwest California has been cancelled. While 1 to 2 inches of rainfall is still expected Sunday and Monday, lower rainfall rates will mitigate the threat of minor flooding concerns. $$ CAZ101>106-108>111-310615- /O.EXT.KEKA.FA.A.0002.210131T1200Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Southern Trinity-Mendocino Coast- Northwestern Mendocino Interior-Northeastern Mendocino Interior- 211 PM PST Sat Jan 30 2021 ...FLOOD WATCH NOW IN EFFECT FROM LATE TONIGHT THROUGH LATE MONDAY NIGHT... The Flood Watch is now in effect for * A portion of northwest California, including the following areas, Coastal Del Norte, Del Norte Interior, Mendocino Coast, Northeastern Mendocino Interior, Northern Humboldt Coast, Northern Humboldt Interior, Northwestern Mendocino Interior, Southern Humboldt Interior, Southern Trinity, and Southwestern Humboldt. * From late tonight through late Monday night * 2 to 4 inches of rain is expected from tonight through Monday night across coastal and valley locations. Locally over 5 inches around coastal Del Norte and southwest Humboldt. 5 to 9 inches expected across southwest facing mountains and ridges. Heavy rain combined with saturated soil and melting snow across the mountains will contribute toward possible flooding. * Low lying areas, creeks, streams, culverts, and portions of urban areas may experience flooding due to heavy rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$
578 WGUS66 KEKA 310521 FFAEKA Flood Watch National Weather Service Eureka CA 921 PM PST Sat Jan 30 2021 .An atmospheric river will focus near the northwest California coast much of Sunday and Monday, before shifting eastward across our area with a cold front late Monday or Monday night. Periods of moderate to heavy rainfall will result, on top of areas where soils have been saturated from recent rains, and heavy snowpack is present. The focus of the heavier rain has shifted a bit farther north and west though, lowering the threat for much of Mendocino County. CAZ101>106-108>111-311415- /O.CON.KEKA.FA.A.0002.210131T0600Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior-Southern Humboldt Interior-Southern Trinity-Mendocino Coast-Northwestern Mendocino Interior-Northeastern Mendocino Interior- 921 PM PST Sat Jan 30 2021 ...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE MONDAY NIGHT... The Flood Watch continues for * A portion of northwest California, including the following areas, Coastal Del Norte, Del Norte Interior, Mendocino Coast, Northeastern Mendocino Interior, Northern Humboldt Coast, Northern Humboldt Interior, Northwestern Mendocino Interior, Southern Humboldt Interior, Southern Trinity and Southwestern Humboldt. * Through late Monday night * 2 To 4 inches of rain is expected from tonight through Monday night across coastal and valley locations. 5 to 7 inches expected across southwest facing mountains and ridges. 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. && $$ CB
713 WGUS66 KEKA 311228 FFAEKA URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Eureka CA 428 AM PST Sun Jan 31 2021 .An atmospheric river will focus near the northwest California coast much of Sunday and Monday, before shifting eastward across our area with a cold front late Monday or Monday night. Periods of moderate to heavy rainfall will result, on top of areas where soils have been saturated from recent rains, and heavy snowpack is present. The focus of the heavier rain has shifted a bit farther north and west though, lowering the threat for much of Mendocino County. CAZ101>106-108>111-312030- /O.CAN.KEKA.FA.A.0002.000000T0000Z-210202T1200Z/ /O.NEW.KEKA.FA.A.0003.210131T1800Z-210202T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Southern Trinity-Mendocino Coast- Northwestern Mendocino Interior-Northeastern Mendocino Interior- 428 AM PST Sun Jan 31 2021 ...FLOOD WATCH IN EFFECT FROM 10 AM PST THIS MORNING THROUGH LATE MONDAY NIGHT... 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, Mendocino Coast, Northeastern Mendocino Interior, Northern Humboldt Coast, Northern Humboldt Interior, Northwestern Mendocino Interior, Southern Humboldt Interior, Southern Trinity, and Southwestern Humboldt. * From 10 AM PST this morning through late Monday night * 2 to 4 inches of rain is expected from today through Monday night across coastal and valley locations. 5 to 7 inches expected across southwest facing mountains and ridges. 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. && $$ JJW
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 29, 6:09 PM PST | Wind Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 70 hr |
| Jan 30, 5:32 AM PST | Winter Storm Warning | EKA | 66 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.