Alert archive / California / Frost Advisories in 2022
Frost Advisory 32, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at May 9, 2022, 3:14 AM PDT for Del Norte County, Humboldt County, California. It took effect at May 10, 2022, 2:00 AM PDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- May 9, 2022, 3:14 AM PDT (10:14 UTC)
- In effect from
- May 10, 2022, 2:00 AM PDT
- Expired
- May 10, 2022, 8:00 AM PDT
- In force
- 6 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 86 km from the middle of the area, began a volume at 10:13 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, 10.2 hours before the alert went out and 158 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
- 31 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 1268 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- -19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
159 WWUS76 KEKA 091014 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 314 AM PDT Mon May 9 2022 CAZ102-105>108-110-111-114-092230- /O.NEW.KEKA.HZ.W.0011.220510T0900Z-220510T1500Z/ /O.CON.KEKA.FZ.W.0021.000000T0000Z-220509T1500Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 314 AM PDT Mon May 9 2022 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... ...HARD FREEZE WARNING IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...For the Hard Freeze Warning, sub-freezing temperatures as low as 26 expected. For the Freeze Warning, sub-freezing temperatures as low as 30. * WHERE...Del Norte Interior, Northern Humboldt Interior, Southern Humboldt Interior, Northern Trinity, Southern Trinity, Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...For the Hard Freeze Warning, from 2 AM to 8 AM PDT Tuesday. For the Freeze Warning, until 8 AM PDT this morning. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ115-092230- /O.NEW.KEKA.FZ.W.0022.220510T0900Z-220510T1500Z/ /O.CON.KEKA.FZ.W.0021.000000T0000Z-220509T1500Z/ Southern Lake- 314 AM PDT Mon May 9 2022 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... ...FREEZE WARNING IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...For the first Freeze Warning, sub-freezing temperatures as low as 32. For the second Freeze Warning, sub-freezing temperatures as low as 30 expected. * WHERE...Southern Lake County. * WHEN...For the first Freeze Warning, until 8 AM PDT this morning. For the second Freeze Warning, from 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ104-109-112-113-092230- /O.NEW.KEKA.FZ.W.0022.220510T0900Z-220510T1500Z/ Southwestern Humboldt-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 314 AM PDT Mon May 9 2022 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 32 expected. * WHERE...Southwestern Humboldt, Mendocino Coast, Southwestern Mendocino Interior and Southeastern Mendocino Interior Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * 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. && $$ CAZ101-103-092230- /O.NEW.KEKA.FR.Y.0032.220510T0900Z-220510T1500Z/ Coastal Del Norte-Northern Humboldt Coast- 314 AM PDT Mon May 9 2022 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Coastal Del Norte and Northern Humboldt Coast Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
4 follow-up statements
744 WWUS76 KEKA 091431 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 731 AM PDT Mon May 9 2022 CAZ102-105>108-110-111-114-092245- /O.EXP.KEKA.FZ.W.0021.000000T0000Z-220509T1500Z/ /O.CON.KEKA.HZ.W.0011.220510T0900Z-220510T1500Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 731 AM PDT Mon May 9 2022 ...HARD FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 22 expected. * WHERE...Southern Trinity, Del Norte Interior, Northeastern Mendocino Interior, Northern Humboldt Interior, Northern Trinity, Southern Humboldt Interior, Northern Lake and Northwestern Mendocino Interior Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ115-092245- /O.EXP.KEKA.FZ.W.0021.000000T0000Z-220509T1500Z/ /O.CON.KEKA.FZ.W.0022.220510T0900Z-220510T1500Z/ Southern Lake- 731 AM PDT Mon May 9 2022 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Southern Lake County. * WHEN...From 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ104-109-112-113-092245- /O.CON.KEKA.FZ.W.0022.220510T0900Z-220510T1500Z/ Southwestern Humboldt-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 731 AM PDT Mon May 9 2022 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Mendocino Coast, Southeastern Mendocino Interior, Southwestern Humboldt and Southwestern Mendocino Interior Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * 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. && $$ CAZ101-103-092245- /O.CON.KEKA.FR.Y.0032.220510T0900Z-220510T1500Z/ Coastal Del Norte-Northern Humboldt Coast- 731 AM PDT Mon May 9 2022 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Coastal Del Norte and Northern Humboldt Coast Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
093 WWUS76 KEKA 092103 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 203 PM PDT Mon May 9 2022 CAZ102-105>108-110-111-114-100515- /O.CON.KEKA.HZ.W.0011.220510T0900Z-220510T1500Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 203 PM PDT Mon May 9 2022 ...HARD FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 22 expected. * WHERE...Southern Trinity, Del Norte Interior, Northeastern Mendocino Interior, Northern Humboldt Interior, Northern Trinity, Southern Humboldt Interior, Northern Lake and Northwestern Mendocino Interior Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ104-109-112-113-115-100515- /O.CON.KEKA.FZ.W.0022.220510T0900Z-220510T1500Z/ Southwestern Humboldt-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake- 203 PM PDT Mon May 9 2022 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Mendocino Coast, Southeastern Mendocino Interior, Southwestern Humboldt, Southwestern Mendocino Interior and Southern Lake Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ101-103-100515- /O.CON.KEKA.FR.Y.0032.220510T0900Z-220510T1500Z/ Coastal Del Norte-Northern Humboldt Coast- 203 PM PDT Mon May 9 2022 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Coastal Del Norte and Northern Humboldt Coast Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * 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. && $$
775 WWUS76 KEKA 100407 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 907 PM PDT Mon May 9 2022 CAZ102-105>108-110-111-114-101215- /O.CON.KEKA.HZ.W.0011.220510T0900Z-220510T1500Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 907 PM PDT Mon May 9 2022 ...HARD FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 26 expected. * WHERE...Southern Trinity, Del Norte Interior, Northeastern Mendocino Interior, Northern Humboldt Interior, Northern Trinity, Southern Humboldt Interior, Northern Lake and Northwestern Mendocino Interior Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ104-109-112-113-115-101215- /O.CON.KEKA.FZ.W.0022.220510T0900Z-220510T1500Z/ Southwestern Humboldt-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake- 907 PM PDT Mon May 9 2022 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Mendocino Coast, Southeastern Mendocino Interior, Southwestern Humboldt, Southwestern Mendocino Interior and Southern Lake Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * 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. && $$ CAZ101-103-101215- /O.CON.KEKA.FR.Y.0032.220510T0900Z-220510T1500Z/ Coastal Del Norte-Northern Humboldt Coast- 907 PM PDT Mon May 9 2022 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM PDT TUESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Coastal Del Norte and Northern Humboldt Coast Counties. * WHEN...From 2 AM to 8 AM PDT Tuesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
188 WWUS76 KEKA 101007 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 307 AM PDT Tue May 10 2022 CAZ102-106>108-110-111-114-102000- /O.NEW.KEKA.FZ.W.0023.220511T0900Z-220511T1500Z/ /O.CON.KEKA.HZ.W.0011.000000T0000Z-220510T1500Z/ Del Norte Interior-Southern Humboldt Interior-Northern Trinity- Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Northern Lake- 307 AM PDT Tue May 10 2022 ...HARD FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... ...FREEZE WARNING IN EFFECT FROM 2 AM TO 8 AM PDT WEDNESDAY... * WHAT...For the Hard Freeze Warning, sub-freezing temperatures as low as 27. For the Freeze Warning, sub-freezing temperatures as low as 30 expected. * WHERE...Del Norte Interior, Southern Humboldt Interior, Northern Trinity, Southern Trinity, Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...For the Hard Freeze Warning, until 8 AM PDT this morning. For the Freeze Warning, from 2 AM to 8 AM PDT Wednesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ115-102000- /O.NEW.KEKA.FZ.W.0023.220511T0900Z-220511T1500Z/ /O.CON.KEKA.FZ.W.0022.000000T0000Z-220510T1500Z/ Southern Lake- 307 AM PDT Tue May 10 2022 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... ...FREEZE WARNING IN EFFECT FROM 2 AM TO 8 AM PDT WEDNESDAY... * WHAT...For the first Freeze Warning, sub-freezing temperatures as low as 30. For the second Freeze Warning, sub-freezing temperatures as low as 31 expected. * WHERE...Southern Lake County. * WHEN...For the first Freeze Warning, until 8 AM PDT this morning. For the second Freeze Warning, from 2 AM to 8 AM PDT Wednesday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ105-102000- /O.NEW.KEKA.FR.Y.0033.220511T0900Z-220511T1500Z/ /O.CON.KEKA.HZ.W.0011.000000T0000Z-220510T1500Z/ Northern Humboldt Interior- 307 AM PDT Tue May 10 2022 ...HARD FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM PDT WEDNESDAY... * WHAT...For the Hard Freeze Warning, sub-freezing temperatures as low as 28. For the Frost Advisory, temperatures as low as 34 will result in frost formation. * WHERE...Northern Humboldt Interior County. * WHEN...For the Hard Freeze Warning, until 8 AM PDT this morning. For the Frost Advisory, from 2 AM to 8 AM PDT Wednesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ104-109-112-113-102000- /O.NEW.KEKA.FR.Y.0033.220511T0900Z-220511T1500Z/ /O.CON.KEKA.FZ.W.0022.000000T0000Z-220510T1500Z/ Southwestern Humboldt-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 307 AM PDT Tue May 10 2022 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM PDT WEDNESDAY... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 30. For the Frost Advisory, temperatures as low as 34 will result in frost formation. * WHERE...Southwestern Humboldt, Mendocino Coast, Southwestern Mendocino Interior and Southeastern Mendocino Interior Counties. * WHEN...For the Freeze Warning, until 8 AM PDT this morning. For the Frost Advisory, from 2 AM to 8 AM PDT Wednesday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ101-102000- /O.NEW.KEKA.FR.Y.0033.220511T0900Z-220511T1500Z/ /O.CON.KEKA.FR.Y.0032.000000T0000Z-220510T1500Z/ Coastal Del Norte- 307 AM PDT Tue May 10 2022 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM PDT WEDNESDAY... * WHAT...For the first Frost Advisory, temperatures as low as 35 will result in frost formation. For the second Frost Advisory, temperatures as low as 35 will result in frost formation. * WHERE...Coastal Del Norte County. * WHEN...For the first Frost Advisory, until 8 AM PDT this morning. For the second Frost Advisory, from 2 AM to 8 AM PDT Wednesday. * 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. && $$ CAZ103-101500- /O.CON.KEKA.FR.Y.0032.000000T0000Z-220510T1500Z/ Northern Humboldt Coast- 307 AM PDT Tue May 10 2022 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Northern Humboldt Coast County. * WHEN...Until 8 AM PDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
What forecasters said that day
The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Eureka, CA wrote its last area forecast discussion before this frost advisory went out at May 8, 2:22 PM PDT, 12 hours 52 minutes earlier.
Area forecast discussion, May 8, 2:22 PM PDT, 12 hours 52 minutes before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
222 PM PDT Sun May 8 2022
.SYNOPSIS...Showers producing coastal hail and mountain snow will
persist across the region through Tuesday. In addition, morning
temperatures will be cold across interior valleys. Another round
of rain is expected Thursday and Friday, followed by drier and
warmer conditions next weekend.
&&
.DISCUSSION...An upper low was centered over WRN OR/WA this
afternoon, with a shortwave impulse rounding the base of the low
over NRN CA. Vigorous shower and isolated thunderstorm development
has occurred with the impulse during much of Sunday. Strong
persistent shower development being driven upslope/inland across
NWRN CA due to deep-layer westerly wind profiles combined with 700
mb temperatures near -14 C will aid in periods of heavy snow
through this evening for elevations at or above 2500 feet MSL. In
addition, small hail accumulations will be possible near sea
level, particularly across Humboldt and Del Norte Counties.
Otherwise, showers are forecast to diminish late tonight, and
skies may partially clear. Freezing temperatures will be probable
across interior valleys as a result.
Another upper wave is forecast to pivot eastward across the region
Monday morning into the afternoon. Widespread shower development
will accompany the passing wave, and thermodynamic profiles will
be marginally supportive of isolated thunderstorm development. In
addition, snow levels from 2500-3000 feet MSL will aid in
additional periods of light snow across the interior mountains
throughout much of Monday. Showers will then clear the region
Monday night as the boundary layer cools/stabilizes. That process
combined with a cold deep-layer airmass will favor another round
of widespread freezing interior valley temperatures. The interior
highlands will then experience renewed shower development during
Tuesday afternoon as a cold upper trough gradually shifts east
across NRN CA.
Later this week, another upper low is forecast to move east across
the PACNW. Multi-model guidance shows a southward trailing surface
cold front entering NWRN CA Thursday afternoon. That feature is
expected to force another round of rain for locations mainly north
of Cape Mendocino through Friday. An upper ridge is then forecast
to amplify over the West Coast during Saturday which will support
drier weather and warmer temperatures during next weekend.
Garner
&&
.AVIATION...Very active weather day around northwest CA impacting
all terminals with frequent showers, hail, gusty winds and
occasional lighting. Strongest winds accompanied the heavier
showers with gusts in the upper 20-30 kt range. This pattern will
continue through much of the next taf cycle as an unseasonably
strong and upper low pressure system slides across the region
providing a moist unstable airmass. Forecast model soundings and
HREF indicate ceilings will remain elevated around 2000 to 3000
feet for the remainder of the early evening allowing for mostly
MVFR conditions. IFR conditions, however, will occur in and around
showers. Gradually clearing and mostly VFR conditions and a
reduction of shower activity is anticipated late this evening as
the trough axis gradually moves east out of the area.
&&
.MARINE...Strong west and northwesterly breezes were observed
today in response to a very active and un-seasonably strong storm
system moving east across the coast. Winds ramped up with near
gale force gusts in the outer waters supporting the the current
gale warnings In addition to the winds, a westerly swell will
quickly rose this afternoon accompanied by a large wind chop.
Given the combined sea state...Hazardous seas warnings are in
effect throughout the waters through this evening. Models show
winds and seas steadily calming early Monday with calm to gentle
breezes and seas dropping below 10 feet. Moderate northerly winds
look to ramp back up Tuesday with calmer conditions later in the
week.
&&
.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
Freeze Warning from 1 AM to 8 AM PDT Monday for CAZ102-
104>111-114-115.
Winter Storm Warning until 11 PM PDT this evening for
CAZ102-105>108-111.
NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 3 PM PDT this afternoon for
PZZ450-455.
Hazardous Seas Warning until 9 PM PDT this evening for
PZZ450-455.
Hazardous Seas Warning until 9 PM PDT this evening for
PZZ470.
Gale Warning until 9 PM PDT this evening for PZZ475.
&&
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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.pngHazardous weather outlook, May 8, 8:07 AM PDT, 19 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Eureka CA 807 AM PDT Sun May 8 2022 CAZ101-103-104-109-112-113-115-091515- Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake- 807 AM PDT Sun May 8 2022 This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ102-105>108-111-091515- Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northeastern Mendocino Interior- 807 AM PDT Sun May 8 2022 ...WINTER STORM WARNING IN EFFECT UNTIL 11 PM PDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM PDT MONDAY... This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. A Winter Storm Warning is currently in effect. A Freeze Warning is currently in effect. .DAYS TWO THROUGH SEVEN...Monday through Saturday. A Freeze Warning is currently in effect. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ110-114-091515- Northwestern Mendocino Interior-Northern Lake- 807 AM PDT Sun May 8 2022 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM PDT MONDAY... This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. A Freeze Warning is currently in effect. .DAYS TWO THROUGH SEVEN...Monday through Saturday. A Freeze Warning is currently in effect. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 2:48 AM PDT | Small Craft Advisory | EKA | 18 hr | |
| May 9, 3:14 AM PDT | Freeze Warning | EKA | Humboldt, Mendocino | 29 hr |
| May 9, 3:14 AM PDT | Hard Freeze Warning | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 29 hr |
Nearby
Frost Advisories in California, 2022Every frost advisory in 2022
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.