Alert archive / California / Winter Storm Warnings in 2023
Winter Storm Warning 11, NWS Eureka, CA
NWS Eureka, CA issued this winter storm warning at Mar 9, 2023, 4:02 PM PST for Trinity County, California. It was in force for 18 hr. 4 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 9, 2023, 4:02 PM PST (00:02 UTC)
- Expired
- Mar 10, 2023, 10:00 AM PST
- In force
- 18 hr
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 101 km from the middle of the area, began a volume at 00:03 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 10, 2:00 AM PST | HEAVY SNOW 42 | 10 Ne Weaverville, CA | SNOW STARTED AT 9AM ON THE 9TH. STATION ELEVATION: 2650 FT. |
| Mar 10, 6:00 AM PST | SNOW 8 | 2 Wnw Ruth, CA | 8 INCHES OF NEW SNOW, HEAVIEST AROUND 3AM. SNOW STOPPED AROUND 6AM. |
| Mar 10, 8:00 AM PST | HEAVY SNOW 24 | 1 N Carrville, CA | COFFEE CREEK, 2800 FT, APPROXIMATELY, 2 FEET OVER NIGHT, VERY WET! LOCATION ESTIMATED BASED ON ABOVE INFORMATION FROM SOCIAL MEDIA. |
| Mar 10, 8:48 AM PST | SNOW 18 | Hayfork, CA | 6 INCHES TO 3 FOOT DRIFTS WITH ABOUT 18 INCH AVERAGE AT 3050 FEET. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 00:00Z, 0.0 hours before the alert went out and 193 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
- 1401 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 602 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
957 WWUS46 KEKA 100002 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 402 PM PST Thu Mar 9 2023 CAZ108-100815- /O.EXP.KEKA.WS.W.0010.000000T0000Z-230310T0000Z/ /O.NEW.KEKA.WS.W.0011.230310T0002Z-230310T0200Z/ /O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/ Southern Trinity- 402 PM PST Thu Mar 9 2023 ...WINTER STORM WARNING IN EFFECT UNTIL 6 PM PST THIS EVENING ABOVE 2500 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM PST FRIDAY ABOVE 2500 FEET... ...WINTER STORM WARNING HAS EXPIRED... * WHAT...For the Winter Storm Warning above 2500 feet, for snow. Winds gusting as high as 60 mph. Snow accumulations for an additional 2 to 4 inches. For the Winter Weather Advisory above 2500 feet, snow expected. Total snow accumulations of up to 3 inches. Winds gusting as high as 45 mph. * WHERE...Southern Trinity County. * WHEN...For the Winter Storm Warning, until 6 PM PST this evening. For the Winter Weather Advisory, from 4 AM to 4 PM PST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning or evening commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ107-100815- /O.CON.KEKA.WS.W.0010.000000T0000Z-230311T0000Z/ Northern Trinity- 402 PM PST Thu Mar 9 2023 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of 6 to 12 inches with amounts over two feet at the higher elevations. Winds gusting as high as 60 mph this through the evening on the higher ridges. * WHERE...Northern Trinity County. * WHEN...Until 4 PM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning or evening commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ102-105-100815- /O.CON.KEKA.WW.Y.0017.230310T0900Z-230311T0000Z/ Del Norte Interior-Northern Humboldt Interior- 402 PM PST Thu Mar 9 2023 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 4 PM PST FRIDAY ABOVE 2500 FEET... * WHAT...Snow expected above 2500 feet. Total snow accumulations of 3 to 5 inches with up to a foot over the higher elevations. Winds gusting as high as 55 mph. * WHERE...Del Norte Interior County. * WHEN...From 1 AM to 4 PM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels will fall to 2000 feet late tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ106-100815- /O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/ Southern Humboldt Interior- 402 PM PST Thu Mar 9 2023 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM PST FRIDAY ABOVE 2500 FEET... * WHAT...Snow expected above 2500 feet. Total snow accumulations of up to 3 inches. Winds gusting as high as 35 mph. * WHERE...Southern Humboldt Interior County. * WHEN...From 4 AM to 4 PM PST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. * ADDITIONAL DETAILS...Snow levels will fall to 2500 feet early Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$
6 follow-up statements
532 WWUS46 KEKA 100151 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 551 PM PST Thu Mar 9 2023 CAZ108-101000- /O.EXT.KEKA.WS.W.0011.000000T0000Z-230310T0400Z/ /O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/ Southern Trinity- 551 PM PST Thu Mar 9 2023 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 8 PM PST THIS EVENING ABOVE 2500 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM PST FRIDAY ABOVE 2500 FEET... * WHAT...For the Winter Storm Warning above 2500 feet, heavy snow. Winds gusting as high as 60 mph. For the Winter Weather Advisory above 2500 feet, snow expected. Total snow accumulations of 3 to 5 inches. Winds gusting as high as 45 mph. * WHERE...Southern Trinity County. * WHEN...For the Winter Storm Warning, until 8 PM PST this evening. For the Winter Weather Advisory, from 4 AM to 4 PM PST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ107-101000- /O.CON.KEKA.WS.W.0010.000000T0000Z-230311T0000Z/ Northern Trinity- 551 PM PST Thu Mar 9 2023 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of 5 to 12 inches. Winds gusting as high as 55 mph. * WHERE...Northern Trinity County. * WHEN...Until 4 PM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ102-105-101000- /O.CON.KEKA.WW.Y.0017.230310T0900Z-230311T0000Z/ Del Norte Interior-Northern Humboldt Interior- 551 PM PST Thu Mar 9 2023 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 4 PM PST FRIDAY ABOVE 2500 FEET... * WHAT...Snow expected above 2500 feet. Total snow accumulations of 3 to 5 inches. Winds gusting as high as 50 mph. * WHERE...Del Norte Interior and Northern Humboldt Interior Counties. * WHEN...From 1 AM to 4 PM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning commute. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ106-101000- /O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/ Southern Humboldt Interior- 551 PM PST Thu Mar 9 2023 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM PST FRIDAY ABOVE 2500 FEET... * WHAT...Snow expected above 2500 feet. Total snow accumulations of up to 3 inches. Winds gusting as high as 35 mph. * WHERE...Southern Humboldt Interior County. * WHEN...From 4 AM to 4 PM PST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$
631 WWUS46 KEKA 100217 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 617 PM PST Thu Mar 9 2023 CAZ108-101030- /O.CAN.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/ /O.EXT.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/ Southern Trinity- 617 PM PST Thu Mar 9 2023 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST FRIDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of 5 to 8 inches. Winds gusting as high as 55 mph. Snow may briefly change to rain during the evening before switching back to snow later tonight. * WHERE...Southern Trinity County. * WHEN...Until 10 AM PST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ107-101030- /O.EXT.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/ Northern Trinity- 617 PM PST Thu Mar 9 2023 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST FRIDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of 5 to 12 inches. Winds gusting as high as 55 mph. * WHERE...Northern Trinity County. * WHEN...Until 10 AM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ102-105-106-101030- /O.EXT.KEKA.WW.Y.0017.230310T0217Z-230310T1800Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior- 617 PM PST Thu Mar 9 2023 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 10 AM PST FRIDAY ABOVE 2500 FEET... * WHAT...Snow above 2500 feet. Additional snow accumulations of 2 to 6 inches. Winds gusting as high as 55 mph. * WHERE...Del Norte Interior, Northern Humboldt Interior and Southern Humboldt Interior Counties. * WHEN...Until 10 AM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$
064 WWUS46 KEKA 100220 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 620 PM PST Thu Mar 9 2023 CAZ102-105-106-101030- /O.CAN.KEKA.WW.Y.0017.000000T0000Z-230310T1800Z/ /O.NEW.KEKA.WW.Y.0018.230310T0800Z-230310T1800Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior- 620 PM PST Thu Mar 9 2023 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST FRIDAY ABOVE 2500 FEET... * WHAT...Snow expected above 2500 feet. Total snow accumulations of 2 to 7 inches. Winds gusting as high as 50 mph. * WHERE...Del Norte Interior, Northern Humboldt Interior and Southern Humboldt Interior Counties. * WHEN...From midnight tonight to 10 AM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ107-101030- /O.CON.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/ Northern Trinity- 620 PM PST Thu Mar 9 2023 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of 5 to 12 inches. Winds gusting as high as 55 mph. * WHERE...Northern Trinity County. * WHEN...Until 10 AM PST Friday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ108-101030- /O.CON.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/ Southern Trinity- 620 PM PST Thu Mar 9 2023 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of 5 to 8 inches. Winds gusting as high as 55 mph. Snow may briefly change to rain during the evening before switching back to snow later tonight. * WHERE...Southern Trinity County. * WHEN...Until 10 AM PST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$
970 WWUS46 KEKA 101022 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 222 AM PST Fri Mar 10 2023 CAZ107-101800- /O.CON.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/ Northern Trinity- 222 AM PST Fri Mar 10 2023 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of 3 inches. Winds gusting as high as 40 mph. * WHERE...Northern Trinity County. * WHEN...Until 10 AM PST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ108-101800- /O.CON.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/ Southern Trinity- 222 AM PST Fri Mar 10 2023 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of up to 3 inches. Winds gusting as high as 45 mph. * WHERE...Southern Trinity County. * WHEN...Until 10 AM PST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ102-105-106-101800- /O.CON.KEKA.WW.Y.0018.000000T0000Z-230310T1800Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior- 222 AM PST Fri Mar 10 2023 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Snow above 2500 feet. Additional snow accumulations of 2 to 7 inches. Winds gusting as high as 40 mph. * WHERE...Del Norte Interior, Northern Humboldt Interior and Southern Humboldt Interior Counties. * WHEN...Until 10 AM PST this morning. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$
862 WWUS46 KEKA 101207 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 407 AM PST Fri Mar 10 2023 CAZ107-101800- /O.CON.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/ Northern Trinity- 407 AM PST Fri Mar 10 2023 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of up to 3 inches. Winds gusting as high as 40 mph. * WHERE...Northern Trinity County. * WHEN...Until 10 AM PST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ108-101800- /O.CON.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/ Southern Trinity- 407 AM PST Fri Mar 10 2023 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of up to two inches. Winds gusting as high as 45 mph. * WHERE...Southern Trinity County. * WHEN...Until 10 AM PST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ102-105-102015- /O.EXT.KEKA.WW.Y.0018.000000T0000Z-230311T0000Z/ Del Norte Interior-Northern Humboldt Interior- 407 AM PST Fri Mar 10 2023 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 2500 FEET... * WHAT...Snow above 2500 feet. Additional snow accumulations of up to 6 inches. Winds gusting as high as 45 mph. * WHERE...Del Norte Interior and Northern Humboldt Interior Counties. * WHEN...Until 4 PM PST this afternoon. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$ CAZ106-101800- /O.CON.KEKA.WW.Y.0018.000000T0000Z-230310T1800Z/ Southern Humboldt Interior- 407 AM PST Fri Mar 10 2023 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Snow above 2500 feet. Additional snow accumulations of up to 3 inches. Winds gusting as high as 35 mph. * WHERE...Southern Humboldt Interior County. * WHEN...Until 10 AM PST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$
065 WWUS46 KEKA 101753 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 953 AM PST Fri Mar 10 2023 CAZ107-101900- /O.EXP.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/ Northern Trinity- 953 AM PST Fri Mar 10 2023 ...WINTER STORM WARNING WILL EXPIRE AT 10 AM PST THIS MORNING ABOVE 2500 FEET... $$ CAZ108-101900- /O.EXP.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/ Southern Trinity- 953 AM PST Fri Mar 10 2023 ...WINTER STORM WARNING WILL EXPIRE AT 10 AM PST THIS MORNING ABOVE 2500 FEET... $$ CAZ106-101900- /O.EXP.KEKA.WW.Y.0018.000000T0000Z-230310T1800Z/ Southern Humboldt Interior- 953 AM PST Fri Mar 10 2023 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING ABOVE 2500 FEET... $$ CAZ102-105-110000- /O.CON.KEKA.WW.Y.0018.000000T0000Z-230311T0000Z/ Del Norte Interior-Northern Humboldt Interior- 953 AM PST Fri Mar 10 2023 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 2500 FEET... * WHAT...Snow above 2500 feet. Additional snow accumulations of up to 4 inches. * WHERE...Del Norte Interior and Northern Humboldt Interior Counties. * WHEN...Until 4 PM PST this afternoon. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state of California can be obtained by calling 1-800-GAS-ROAD. && $$
What forecasters said that day
The local office's own words before this winter storm warning 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 winter storm warning went out at Mar 9, 3:27 PM PST, 35 minutes earlier.
Area forecast discussion, Mar 9, 3:27 PM PST, 35 minutes before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
327 PM PST Thu Mar 9 2023
.SYNOPSIS...A frontal boundary is bringing heavy wind and rain to
the area this afternoon with mainly high snow levels, except
locally lower snow levels in northeastern Trinity county. Snow
levels will fall tonight behind the frontal boundary to 2000 to
3000 feet. Rain and snow will taper off through Friday.
Additional light rain is forecast to occur over the weekend,
followed by another period of heavier rain and gusty winds early
next week.
&&
.DISCUSSION...A frontal boundary is approaching with rain is
currently moving onshore. This is a fairly warm system and has
tropical connections and fairly strong moisture transport. Snow
levels have risen across much of the area as expected, although
although areas of Trinity are still seeing snow down to 2,500
feet. A secondary area of low pressure moving along the front is
deepening and bringing us strong winds. Gusts of 40 to 70 mph have
been reported.
The heavier rain is expected to continue this evening until the
front passes by around midnight in the north and moving south
across the area overnight. Colder air will move in behind this
front dropping the snow levels to 2000 to 3000 feet with the
lowest in the north. Several inches of snow is possible in this
colder air. Have added a winter weather advisory above 2000 feet
for Del Norte county. As this system has sped up slightly the
rain and snow looks to end earlier on Friday now. The flood watch
for Mendocino and Lake counties remains in effect through Friday
evening, but this may need to be shortened with the rain ending
sooner.
Saturday a warm front pushes up from the south bringing more rain
and clouds to the area along with higher snow levels and warmer
temperatures. This rain is expected to be more intermittent and
mainly light rain. Saturday night and Sunday the flow becomes
more zonal and periods of heavier is expected as some shortwaves
move through the flow.
Monday and Monday night models have come into better agreement on
another frontal boundary with tropical connections bringing
additional heavy rain to the area. This is likely to bring
additional flooding and strong winds. Snow levels will be high
again through Monday night. Tuesday the front moves through and
snow levels are expected to fall, but only to around 3000 feet.
These lower snow levels look to continue into Wednesday morning as
the upper level trough moves through. There is still some
disagreement in how much precip will be associated with this upper
level trough. MKK
&&
.AVIATION...Merging atmospheric river (AR) and NW storm systems
continued to be the catalyst for gradual and expanding aviation
weather concerns across the region today-tonight. SE-S winds,
steadfast and gusty, have been impacting coastal sites all day.
Above ground winds have revved up and will continued to increase
into evening...keeping probable the threat of LLWS at main air
terminals and local airfields. Cloud ceilings have generally
remained VFR ahead of the incoming weather system, except for
prevailing MVFR clouds over Mendocino. VIS has occasionally dipped
into MVFR this afternoon. However, weather across the entire
region will continue to decline through evening. Also, light rain
advection will increase and most likely bring in periods of
intermittent moderate to heavy rain. /TA
&&
.MARINE...Southerly winds continue strengthening across the
waters as the frontal system moves toward the region. Storm force
gust winds up to 55 kts will be likely from this afternoon through
this evening across the outer waters, with gale force gusts
across the inner waters. Gusts will occasionally reach storm force
in the near shore waters, particularly near Cape Mendocino. Short
period southerly waves will ramp up to 17 feet in response to
these winds, with combined seas approaching 20 feet. Winds and
seas are expected to rapidly decrease tonight and into
Friday...though winds will remain elevated for the northern waters
through early Saturday afternoon. Seas will continue to gradually
subside into Saturday morning as result. /SEC&ZVS
&&
.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
Wind Advisory until 10 PM PST this evening for CAZ101>115.
Winter Weather Advisory from 1 AM to 4 PM PST Friday for
CAZ102-105.
Winter Weather Advisory from 4 AM to 4 PM PST Friday for
CAZ106-108.
Winter Storm Warning until 4 PM PST Friday for CAZ107.
Winter Storm Warning until 4 PM PST this afternoon for
CAZ108.
Flood Watch through Friday evening for CAZ109>115.
NORTHWEST CALIFORNIA COASTAL WATERS...
Wind Advisory until 10 PM PST this evening for PZZ410.
Gale Warning until 10 PM PST this evening for PZZ450-455.
Storm Warning until 9 PM PST this evening for PZZ470-475.
&&
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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.pngHazardous weather outlook, Mar 9, 3:15 AM PST, 12 hours 47 minutes before
Hazardous Weather Outlook National Weather Service Eureka CA 315 AM PST Thu Mar 9 2023 CAZ101>104-101115- Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt- 315 AM PST Thu Mar 9 2023 ...WIND ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING... This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. A Wind Advisory is currently in effect. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ109>115-101115- Mendocino Coast-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 315 AM PST Thu Mar 9 2023 ...WIND ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING... ...FLOOD WATCH IN EFFECT FROM 1 PM PST THIS AFTERNOON THROUGH FRIDAY EVENING... This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. A Wind Advisory is currently in effect. A Flood Watch is currently in effect. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. A Flood Watch is currently in effect. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ105-106-101115- Northern Humboldt Interior-Southern Humboldt Interior- 315 AM PST Thu Mar 9 2023 ...WIND ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING... ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 4 PM PST FRIDAY... This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. A Wind Advisory is currently in effect. A Winter Weather Advisory is currently in effect. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. A Winter Weather Advisory is currently in effect. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ107-101115- Northern Trinity- 315 AM PST Thu Mar 9 2023 ...WIND ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING... ...WINTER STORM WARNING IN EFFECT FROM 7 AM THIS MORNING TO 7 PM PST FRIDAY... This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. A Wind Advisory is currently in effect. A Winter Storm Warning is currently in effect. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. A Winter Storm Warning is currently in effect. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ108-101115- Southern Trinity- 315 AM PST Thu Mar 9 2023 ...WIND ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING... ...WINTER STORM WARNING IN EFFECT FROM 7 AM THIS MORNING TO 4 PM PST THIS AFTERNOON... This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. A Wind Advisory is currently in effect. A Winter Storm Warning is currently in effect. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .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 |
|---|---|---|---|---|
| Mar 9, 6:20 PM PST | Winter Weather Advisory | EKA | Del Norte, Humboldt | 22 hr |
| Mar 9, 8:42 PM PST | Small Craft Advisory | EKA | 24 hr | |
| Mar 9, 10:29 PM PST | Areal Flood Advisory | EKA | Humboldt, Lake, Mendocino | 5 hr |
| Mar 9, 10:46 PM PST | Areal Flood Advisory | EKA | Humboldt | 5 hr |
| Mar 10, 3:39 AM PST | Areal Flood Advisory | EKA | Mendocino | 8 hr |
Nearby
Winter Storm Warnings in California, 2023Every winter storm warning in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.