Alert archive / California / Frost Advisories in 2024
Frost Advisory 13, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at May 5, 2024, 2:07 AM PDT for Mendocino County, Trinity County, California. It took effect at May 5, 2024, 8:00 PM PDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- May 5, 2024, 2:07 AM PDT (09:07 UTC)
- In effect from
- May 5, 2024, 8:00 PM PDT
- Expired
- May 6, 2024, 10:00 AM PDT
- In force
- 14 hr
- Issued by
- NWS Eureka, CA
Counties Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 100 km from the middle of the area, began a volume at 09:07 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
Medford/Jackson, OR (KMFR), launched 00:00Z, 9.1 hours before the alert went out and 262 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
- 2 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 674 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -44 m²/s²
- 0-3 km storm-relative helicity
- -34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
767 WWUS76 KEKA 050907 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 207 AM PDT Sun May 5 2024 CAZ110-052200- /O.NEW.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Northwestern Mendocino Interior- Including Potter Valley, Willits, and Laytonville 207 AM PDT Sun May 5 2024 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northwestern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ111-052200- /O.NEW.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Northeastern Mendocino Interior- Including Covelo 207 AM PDT Sun May 5 2024 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northeastern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ113-052200- /O.NEW.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Southeastern Mendocino Interior- 207 AM PDT Sun May 5 2024 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Southeastern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ115-052200- /O.NEW.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Southern Lake- Including Knobcone Camp, Middletown, and Lakeport 207 AM PDT Sun May 5 2024 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Southern Lake. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ107-052200- /O.NEW.KEKA.FZ.A.0003.240506T0800Z-240506T1600Z/ Northern Trinity- Including Junction City, Helena, Del Loma, Weaverville, Big Bar, and Douglas City 207 AM PDT Sun May 5 2024 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH MONDAY MORNING... * WHAT...Sub-freezing temperatures as low as 31 possible. * WHERE...Northern Trinity. * WHEN...From late tonight through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ108-052200- /O.NEW.KEKA.FZ.A.0003.240506T0800Z-240506T1600Z/ Southern Trinity- Including Hayfork, Peanut, and Forest Glen 207 AM PDT Sun May 5 2024 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH MONDAY MORNING... * WHAT...Sub-freezing temperatures as low as 31 possible. * WHERE...Southern Trinity. * WHEN...From late tonight through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka JJW
5 follow-up statements
048 WWUS76 KEKA 052129 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 229 PM PDT Sun May 5 2024 CAZ110-060530- /O.CON.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Northwestern Mendocino Interior- Including Willits, Laytonville, and Potter Valley 229 PM PDT Sun May 5 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northwestern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ111-060530- /O.CON.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Northeastern Mendocino Interior- Including Covelo 229 PM PDT Sun May 5 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northeastern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ113-060530- /O.CON.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Southeastern Mendocino Interior- 229 PM PDT Sun May 5 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Southeastern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ115-060530- /O.CON.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Southern Lake- Including Knobcone Camp, Middletown, and Lakeport 229 PM PDT Sun May 5 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Southern Lake. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ107-060530- /O.CON.KEKA.FZ.A.0003.240506T0800Z-240506T1600Z/ Northern Trinity- Including Helena, Junction City, Weaverville, Douglas City, Del Loma, and Big Bar 229 PM PDT Sun May 5 2024 ...FREEZE WATCH REMAINS IN EFFECT FROM 1 AM PDT MONDAY THROUGH MONDAY MORNING... * WHAT...Sub-freezing temperatures as low as 31 possible. * WHERE...Northern Trinity. * WHEN...From 1 AM PDT Monday through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ108-060530- /O.CON.KEKA.FZ.A.0003.240506T0800Z-240506T1600Z/ Southern Trinity- Including Peanut, Hayfork, and Forest Glen 229 PM PDT Sun May 5 2024 ...FREEZE WATCH REMAINS IN EFFECT FROM 1 AM PDT MONDAY THROUGH MONDAY MORNING... * WHAT...Sub-freezing temperatures as low as 31 possible. * WHERE...Southern Trinity. * WHEN...From 1 AM PDT Monday through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka EYS
447 WWUS76 KEKA 060002 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 502 PM PDT Sun May 5 2024 CAZ107-060815- /O.UPG.KEKA.FZ.A.0003.240506T0800Z-240506T1600Z/ /O.EXB.KEKA.FR.Y.0013.240506T0300Z-240506T1700Z/ Northern Trinity- Including Big Bar, Carrville, Douglas City, Del Loma, Trinity Center, Junction City, Helena, and Weaverville 502 PM PDT Sun May 5 2024 ...FROST ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 AM PDT MONDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Northern Trinity. * WHEN...From 8 PM this evening to 10 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ108-060815- /O.UPG.KEKA.FZ.A.0003.240506T0800Z-240506T1600Z/ /O.EXB.KEKA.FR.Y.0013.240506T0300Z-240506T1700Z/ Southern Trinity- Including Hayfork, Forest Glen, Peanut, and Zenia 502 PM PDT Sun May 5 2024 ...FROST ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 AM PDT MONDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Southern Trinity. * WHEN...From 8 PM this evening to 10 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ110-060815- /O.CON.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Northwestern Mendocino Interior- Including Laytonville, Willits, and Potter Valley 502 PM PDT Sun May 5 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northwestern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ111-060815- /O.CON.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Northeastern Mendocino Interior- Including Covelo 502 PM PDT Sun May 5 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northeastern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ113-060815- /O.CON.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Southeastern Mendocino Interior- 502 PM PDT Sun May 5 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Southeastern Mendocino Interior. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ115-060815- /O.CON.KEKA.FR.Y.0013.240506T0800Z-240506T1600Z/ Southern Lake- Including Knobcone Camp, Middletown, and Lakeport 502 PM PDT Sun May 5 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT MONDAY... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Southern Lake. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka
384 WWUS76 KEKA 060805 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 105 AM PDT Mon May 6 2024 CAZ107-061700- /O.CON.KEKA.FR.Y.0013.000000T0000Z-240506T1700Z/ Northern Trinity- Including Carrville, Trinity Center, and Weaverville 105 AM PDT Mon May 6 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Northern Trinity. * WHEN...Until 10 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ108-061700- /O.CON.KEKA.FR.Y.0013.000000T0000Z-240506T1700Z/ Southern Trinity- Including Zenia, Forest Glen, Peanut, and Hayfork 105 AM PDT Mon May 6 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Southern Trinity. * WHEN...Until 10 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ110-061600- /O.CON.KEKA.FR.Y.0013.000000T0000Z-240506T1600Z/ Northwestern Mendocino Interior- Including Laytonville, Potter Valley, and Willits 105 AM PDT Mon May 6 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northwestern Mendocino Interior. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ111-061600- /O.CON.KEKA.FR.Y.0013.000000T0000Z-240506T1600Z/ Northeastern Mendocino Interior- Including Covelo 105 AM PDT Mon May 6 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northeastern Mendocino Interior. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ113-061600- /O.CON.KEKA.FR.Y.0013.000000T0000Z-240506T1600Z/ Southeastern Mendocino Interior- 105 AM PDT Mon May 6 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Southeastern Mendocino Interior. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ115-061600- /O.CON.KEKA.FR.Y.0013.000000T0000Z-240506T1600Z/ Southern Lake- Including Knobcone Camp, Middletown, and Lakeport 105 AM PDT Mon May 6 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Southern Lake. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka
506 WWUS76 KEKA 061617 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 917 AM PDT Mon May 6 2024 CAZ110-111-113-115-061730- /O.EXP.KEKA.FR.Y.0013.000000T0000Z-240506T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake- Including Laytonville, Middletown, Willits, Potter Valley, Covelo, Lakeport, and Knobcone Camp 917 AM PDT Mon May 6 2024 ...FROST ADVISORY HAS EXPIRED... Temperatures will continue to climb this morning. $$ CAZ107-061730- /O.CON.KEKA.FR.Y.0013.000000T0000Z-240506T1700Z/ Northern Trinity- Including Carrville, Trinity Center, and Weaverville 917 AM PDT Mon May 6 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * WHAT...Temperatures as low as 39 will result in frost formation. * WHERE...Northern Trinity. * WHEN...Until 10 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ108-061730- /O.CON.KEKA.FR.Y.0013.000000T0000Z-240506T1700Z/ Southern Trinity- Including Zenia, Peanut, Forest Glen, and Hayfork 917 AM PDT Mon May 6 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * WHAT...Temperatures as low as 39 will result in frost formation. * WHERE...Southern Trinity. * WHEN...Until 10 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka MH
080 WWUS76 KEKA 061658 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 958 AM PDT Mon May 6 2024 CAZ107-108-061800- /O.EXP.KEKA.FR.Y.0013.000000T0000Z-240506T1700Z/ Northern Trinity-Southern Trinity- Including Zenia, Forest Glen, Carrville, Peanut, Trinity Center, Hayfork, and Weaverville 958 AM PDT Mon May 6 2024 ...FROST ADVISORY WILL EXPIRE AT 10 AM PDT THIS MORNING... The threat has ended. $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka MH
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 2:07 AM PDT | Freeze Watch | EKA | Trinity | 15 hr |
| May 5, 3:10 AM PDT | Small Craft Advisory | EKA | 33 hr | |
| May 5, 3:00 PM PDT | Gale Watch | EKA | 24 hr |
Nearby
Frost Advisories in California, 2024Every frost advisory in 2024
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.