Alert archive / California / Frost Advisories in 2021
Frost Advisory 46, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Oct 13, 2021, 2:15 PM PDT for Del Norte County, Mendocino County, California. It took effect at Oct 14, 2021, 1:00 AM PDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Oct 13, 2021, 2:15 PM PDT (21:15 UTC)
- In effect from
- Oct 14, 2021, 1:00 AM PDT
- Expired
- Oct 14, 2021, 9:00 AM PDT
- In force
- 8 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 51 km from the middle of the area, began a volume at 21:18 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, 9.3 hours before the alert went out and 212 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
- 480 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
830 WWUS76 KEKA 132115 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 215 PM PDT Wed Oct 13 2021 CAZ105>108-110-111-114-140515- /O.UPG.KEKA.FZ.A.0008.211014T0800Z-211014T1600Z/ /O.NEW.KEKA.FZ.W.0021.211014T0800Z-211014T1600Z/ Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Northern Lake- 215 PM PDT Wed Oct 13 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM PDT THURSDAY... * WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Northern Humboldt Interior, Southern Humboldt Interior, Northern Trinity, Southern Trinity, Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...From 1 AM to 9 AM PDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ102-109-113-115-140515- /O.NEW.KEKA.FR.Y.0046.211014T0800Z-211014T1600Z/ Del Norte Interior-Mendocino Coast- Southeastern Mendocino Interior-Southern Lake- 215 PM PDT Wed Oct 13 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Del Norte Interior, Mendocino Coast, Southeastern Mendocino Interior and Southern Lake Counties. * WHEN...From 1 AM to 9 AM PDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
3 follow-up statements
035 WWUS76 KEKA 140515 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1015 PM PDT Wed Oct 13 2021 CAZ105>108-110-111-114-141315- /O.CON.KEKA.FZ.W.0021.211014T0800Z-211014T1600Z/ Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Northern Lake- 1015 PM PDT Wed Oct 13 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THURSDAY... * WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Northern Humboldt Interior, Southern Humboldt Interior, Northern Trinity, Southern Trinity, Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...From 1 AM to 9 AM PDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ102-109-113-115-141315- /O.CON.KEKA.FR.Y.0046.211014T0800Z-211014T1600Z/ Del Norte Interior-Mendocino Coast- Southeastern Mendocino Interior-Southern Lake- 1015 PM PDT Wed Oct 13 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Del Norte Interior, Mendocino Coast, Southeastern Mendocino Interior and Southern Lake Counties. * WHEN...From 1 AM to 9 AM PDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
068 WWUS76 KEKA 141303 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 603 AM PDT Thu Oct 14 2021 CAZ105>108-110-111-114-141600- /O.CON.KEKA.FZ.W.0021.000000T0000Z-211014T1600Z/ Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Northern Lake- 603 AM PDT Thu Oct 14 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 28. * WHERE...Southern Trinity, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Humboldt Interior, Northern Trinity, Southern Humboldt Interior and Northern Lake Counties. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ102-109-113-115-141600- /O.CON.KEKA.FR.Y.0046.000000T0000Z-211014T1600Z/ Del Norte Interior-Mendocino Coast- Southeastern Mendocino Interior-Southern Lake- 603 AM PDT Thu Oct 14 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Mendocino Coast, Del Norte Interior, Southeastern Mendocino Interior and Southern Lake Counties. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
581 WWUS76 KEKA 141530 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 830 AM PDT Thu Oct 14 2021 CAZ105>108-110-111-114-141630- /O.EXP.KEKA.FZ.W.0021.000000T0000Z-211014T1600Z/ Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Northern Lake- 830 AM PDT Thu Oct 14 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM PDT THIS MORNING... $$ CAZ102-109-113-115-141630- /O.EXP.KEKA.FR.Y.0046.000000T0000Z-211014T1600Z/ Del Norte Interior-Mendocino Coast- Southeastern Mendocino Interior-Southern Lake- 830 AM PDT Thu Oct 14 2021 ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 13, 2:15 PM PDT | Freeze Warning | EKA | Humboldt, Lake, Mendocino, Trinity | 19 hr |
Nearby
Frost Advisories in California, 2021Every frost advisory in 2021
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.