Alert archive / California / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 14, NWS Eureka, CA
NWS Eureka, CA issued this severe thunderstorm warning at Jun 3, 2009, 4:47 PM PDT for Humboldt County, Trinity County, California. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 3, 2009, 4:47 PM PDT (23:47 UTC)
- Expired
- Jun 3, 2009, 5:00 PM PDT
- In force
- 13 min
- Issued by
- NWS Eureka, CA
- Area
- Storm-based polygon
Counties Humboldt County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 76 km from the middle of the area, began a volume at 23:48 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 11.8 hours before the alert went out and 169 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 873 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS56 KEKA 032347 SVREKA CAC023-105-040000- /O.NEW.KEKA.SV.W.0014.090603T2347Z-090604T0000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE 447 PM PDT WED JUN 3 2009 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HUMBOLDT COUNTY IN NORTHWEST CALIFORNIA... THIS INCLUDES THE CITIES OF...WILLOW CREEK...HOOPA... TRINITY COUNTY IN NORTHWEST CALIFORNIA... * UNTIL 500 PM PDT * AT 442 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THIS STORM WAS LOCATED NEAR SALYER...OR NEAR WILLOW CREEK...AND MOVING NORTHWEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. HAIL UP TO THREE QUARTERS OF AN INCH IN DIAMETER HAS BEEN REPORTED NEAR HYAMPOM WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. && LAT...LON 4110 12389 4116 12355 4086 12351 4083 12366 TIME...MOT...LOC 2347Z 156DEG 9KT 4092 12362 $$ TH
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 3, 2:09 PM PDT, 2 hours 38 minutes earlier.
Area forecast discussion, Jun 3, 2:09 PM PDT, 2 hours 38 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE EUREKA CA 210 PM PDT WED JUNE 03 2009 SYNOPSIS...AN AREA OF LOW PRESSURE ALONG THE WEST COAST WILL CONTINUE TO PRODUCE SHOWERS AND ISOLATED THUNDERSTORMS TO NORTHWEST CALIFORNIA THROUGH THE END OF THE WEEK. && .SHORT TERM...TONIGHT THROUGH SATURDAY...SATELLITE AND RADAR IMAGERY SHOW CONVECTION DEVELOPING THIS AFTERNOON. EXPECT SCT SHRA AND ISOLD TSTMS TO CONTINUE TO DEVELOP OVER THE REGION AND PROPAGATE TO THE NW ACROSS THE CWA AS QUASI STATIONARY UPPER LOW REMAINS OFF THE COAST. STABILITY INDICES SHOW SLIGHT POTENTIAL FOR LARGE HAIL AND DAMAGING WINDS WITH STORMS THIS AFTERNOON...SO WILL CONTINUE TO MONITOR RADAR TRENDS THROUGH THIS EVENING. EXPECT CONVECTION TO PEAK BY EARLY THIS EVENING AS A MINOR SHORT WAVE ROTATES AROUND THE PARENT LOW WITH SHOWERS CONTINUING THROUGH THE NIGHT IN THE UNSTABLE ATMOSPHERE. A SERIES OF VORT MAXES WILL ROTATE AROUND THE LOW AND COMBINE WITH A RELATIVELY DEEP MOIST LAYER TO CONTINUE THE THREAT OF CONVECTION THU. MODELS IN GOOD AGREEMENT ON UPPER LOW DRIFTING ONSHORE FRI WITH AFTERNOON CONVECTION EXPECTED AGAIN. THE THREAT FOR TSTMS WILL DIMINISH SAT AS THE UPPER LOW MOVES E OF THE REGION. BC && .LONG TERM (SATURDAY NIGHT THROUGH WEDNESDAY)...THE MEDIUM RANGE MODELS CONTINUE TO SHOW SOME CHANGES IN HOW THE UPPER LOW IS HANDLED THROUGH THE INITIAL PART OF THE EXTENDED. HOWEVER THE GENERAL IDEA OF MOVING THE LOW ONSHORE AND DEVELOPING SPLIT FLOW ALOFT IS MAINTAINED. THE LATEST ITERATION BRINGS THE LOW ONSHORE SOUTH OF POINT CONCEPTION EARLY SATURDAY EVENING...AND INLAND ACROSS LAS VEGAS BY 12Z SUNDAY. THE SOUTHERN BRANCH OF THE SPLIT FLOW PUSHES A LOW WEST TO THE OFFSHORE WATERS EARLY NEXT WEEK. NORTHERN CALIFORNIA WILL REMAIN IN LIGHT NORTHERLY FLOW WITH LINGERING MOISTURE THROUGH MONDAY...WITH A WEAK SHORTWAVE FORECAST BY THE GFS TO BRUSH THE CWA LATE MONDAY INTO TUESDAY...FOLLOWED BY A SIMILAR WEAK SYSTEM EARLY WEDNESDAY. CILIBERTI && .MARINE...LIGHT WINDS AND LOW SEAS WILL PREVAIL THROUGH THE WEEK. THE SEAS WILL CONTAIN A MIX OF SHORT PERIOD NW SWELL AND LONG PERIOD SOUTH TO SW SWELL...WITH SIG WAVE HEIGHTS NEAR 3 FEET. ISOLATED THUNDERSTORMS WILL PERSIST THROUGH FRIDAY...BRINGING OCCASIONAL CLOUD-TO-WATER LIGHTNING STRIKES...HEAVY RAIN...HAIL AND SUDDEN BURSTS OF WIND. && .AVIATION...CONTINUED ADVECTION OF MOIST AIR AND INSTABILITY...ASSOCIATED WITH A LOW PRESSURE SYSTEM CENTERED OFF THE CENTRAL COAST...WILL PRODUCE SHOWERS AND THE THREAT OF THUNDERSTORMS ACROSS THE REGION. THE STORMS MAY PRODUCE HAIL...HEAVY RAIN AS WELL AS STRONG AND ABRUPT WINDS. THESE ARE STANDARD FLIGHT HAZARDS ASSOCIATED WITH CONVECTION...AND ARE THE PRIMARY RISK TO AVIATION. AS TYPICAL...POCKETS OF IFR TO MVFR CONDITIONS WILL CONTINUE ALONG THE COASTAL STRIP. ASHFORD && .EKA WATCHES/WARNINGS/ADVISORIES... NONE. && VISIT US AT HTTP://WWW.WEATHER.GOV/EUREKA
Hazardous weather outlook, Jun 3, 5:18 AM PDT, 11 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EUREKA CA 518 AM PDT WED JUN 3 2009 CAZ001>004-076-041230- REDWOOD COAST-MENDOCINO COAST-NORTH COAST INTERIOR- UPPER TRINITY RIVER-MENDOCINO INTERIOR- 518 AM PDT WED JUN 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST CALIFORNIA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORM ACTIVITY WILL CONTINUE ACROSS NORTHWEST CALIFORNIA TODAY AND TONIGHT. STORMS WILL BE ACCOMPANIED BY LIGHTNING...HAIL ...GUSTY WINDS AND POTENTIALLY HEAVY RAIN. ALTHOUGH A MAJORITY OF THE STORMS ARE NOT EXPECTED TO BECOME SEVERE...THE THREAT OF ISOLATED STORMS CONTAINING DAMAGING WINDS OR HAIL IS POSSIBLE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THUNDERSTORM ACTIVITY WILL CONTINUE ACROSS NORTHWEST CALIFORNIA THROUGH THURSDAY. STORMS WILL BE ACCOMPANIED BY LIGHTNING...HAIL ...GUSTY WINDS AND POTENTIALLY HEAVY RAIN. ALTHOUGH A MAJORITY OF THE STORMS ARE NOT EXPECTED TO BECOME SEVERE...THE THREAT OF ISOLATED STORMS CONTAINING DAMAGING WINDS OR HAIL IS POSSIBLE. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS SUCH AS LIGHTNING...STRONG WINDS...HAIL OR FLOODING TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.
In the hours before
Special weather statement, Jun 3, 3:51 PM PDT, 56 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
351 PM PDT WED JUN 3 2009
CAZ003-032330-
HUMBOLDT CA-
351 PM PDT WED JUN 3 2009
THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
CENTRAL HUMBOLDT COUNTY IN NORTHWEST CALIFORNIA
UNTIL 430 PM PDT
AT 350 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 12 MILES NORTH OF DINSMORE..MOVING NORTHWEST AT
10 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.
LOCATIONS IMPACTED INCLUDE...
RURAL CENTRAL HUMBOLDT COUNTY...
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
LAT...LON 4064 12394 4081 12380 4068 12362 4059 12358
4056 12361
TIME...MOT...LOC 2251Z 126DEG 11KT 4064 12368
BCLocal storm report, Jun 3, 4:17 PM PDT, 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
417 PM PDT WED JUN 03 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0250 PM HAIL 4 E RUTH 40.29N 123.33W
06/03/2009 M0.50 INCH TRINITY CA TRAINED SPOTTER
THUNDERSTORM WITH LIGHTNING AND MOSTLY SAMLL PEA SIZE
HAIL, BUT OCCASIONAL EMBEDDED 1/2 INCH.
0300 PM HAIL 15 WNW RUTH 40.36N 123.66W
06/03/2009 M0.25 INCH HUMBOLDT CA TRAINED SPOTTER
ACTUAL DOUBLE PEA SIZE HAIL IN TORRENTIAL RAIN.REPORT FOR
TOP OF SOUTH FORK MOUNTAIN AT 4136 FEET AND 8 MILES WEST
OF MAD RIVER.
0355 PM HAIL HYAMPOM 40.62N 123.45W
06/03/2009 M1.75 INCH TRINITY CA PUBLIC
AT THE HYAMPOM GENERAL STORE. SEVERE THUNDERSTORM
WITHRAIN. 1/2 HAIL IN THE VALLEY. GOLF SIZE HAIL ON THE
MOUNTAIN.
&&
ASHFORDLocal storm report, Jun 3, 4:17 PM PDT, 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
417 PM PDT WED JUN 03 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0250 PM HAIL 4 E RUTH 40.29N 123.33W
06/03/2009 M0.50 INCH TRINITY CA TRAINED SPOTTER
THUNDERSTORM WITH LIGHTNING AND MOSTLY SMALL PEA SIZE
HAIL, BUT OCCASIONAL EMBEDDED 1/2 INCH.
0300 PM HAIL 15 WNW RUTH 40.36N 123.66W
06/03/2009 M0.25 INCH HUMBOLDT CA TRAINED SPOTTER
ACTUAL DOUBLE PEA SIZE HAIL IN TORRENTIAL RAIN. REPORT
FROM TOP OF SOUTH FORK MOUNTAIN AT 4136 FEET AND 8 MILES
WEST OF MAD RIVER.
0355 PM HAIL HYAMPOM 40.62N 123.45W
06/03/2009 M1.75 INCH TRINITY CA PUBLIC
AT THE HYAMPOM GENERAL STORE. SEVERE THUNDERSTORM
WITH RAIN. 1/2 HAIL IN THE VALLEY. GOLF SIZE HAIL ON
THE MOUNTAIN.
&&
ASHFORDSpecial weather statement, Jun 3, 4:26 PM PDT, 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
426 PM PDT WED JUN 3 2009
CAZ003-032345-
HUMBOLDT CA-
426 PM PDT WED JUN 3 2009
THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
SOUTHWESTERN HUMBOLDT COUNTY IN NORTHWEST CALIFORNIA
UNTIL 445 PM PDT
AT 422 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 6 MILES SOUTHWEST OF MYERS FLAT...OR 4 MILES
EAST OF HONEYDEW...MOVING NORTHWEST AT 15 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING.
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
LAT...LON 4048 12420 4048 12416 4045 12409 4023 12388
4014 12397 4030 12431 4033 12430 4038 12432
TIME...MOT...LOC 2325Z 132DEG 14KT 4023 12399
BKSpecial weather statement, Jun 3, 4:36 PM PDT, 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EUREKA CA 436 PM PDT WED JUN 3 2009 CAZ076-040000- MENDOCINO CA- 436 PM PDT WED JUN 3 2009 THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... NORTH CENTRAL MENDOCINO COUNTY IN NORTHWEST CALIFORNIA UNTIL 500 PM PDT AT 436 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 9 MILES SOUTHEAST OF COVELO..MOVING NORTH AT 20 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. LAT...LON 3991 12338 3995 12309 3964 12306 3962 12325 TIME...MOT...LOC 2336Z 170DEG 16KT 3969 12318 BK
Special weather statement, Jun 3, 4:42 PM PDT, 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
442 PM PDT WED JUN 3 2009
CAZ002-076-040015-
MENDOCINO CA-
442 PM PDT WED JUN 3 2009
THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
WEST CENTRAL MENDOCINO COUNTY IN NORTHWEST CALIFORNIA
UNTIL 515 PM PDT
AT 441 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES SOUTH OF LAYTONVILLE..MOVING NORTHWEST AT
15 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.
THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
LAT...LON 3982 12362 3959 12338 3950 12347 3964 12378
3967 12380
TIME...MOT...LOC 2342Z 132DEG 15KT 3958 12349
BKThe office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 2, 6:15 PM PDT | Special Weather Statement | EKA | Mendocino | 45 min |
| Jun 2, 6:32 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino | 28 min |
| Jun 2, 7:15 PM PDT | Special Weather Statement | EKA | Siskiyou | 45 min |
| Jun 3, 2:43 PM PDT | Areal Flood Advisory | EKA | Mendocino | 3 hr |
| Jun 3, 2:47 PM PDT | Special Weather Statement | EKA | Trinity | 43 min |
| Jun 3, 3:04 PM PDT | Special Weather Statement | EKA | 56 min | |
| Jun 3, 3:21 PM PDT | Severe Thunderstorm Warning | EKA | Humboldt, Trinity | 24 min |
| Jun 3, 3:28 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino, Trinity | 32 min |
| Jun 3, 3:44 PM PDT | Severe Thunderstorm Warning | EKA | Humboldt, Trinity | 46 min |
| Jun 3, 3:51 PM PDT | Special Weather Statement | EKA | Humboldt | 39 min |
| Jun 3, 4:00 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino | 18 min |
| Jun 3, 4:05 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 25 min |
| Jun 3, 4:20 PM PDT | Severe Thunderstorm Warning | EKA | Humboldt | 25 min |
| Jun 3, 4:26 PM PDT | Special Weather Statement | EKA | Humboldt | 19 min |
| Jun 3, 4:36 PM PDT | Special Weather Statement | EKA | Mendocino | 24 min |
| Jun 3, 4:42 PM PDT | Special Weather Statement | EKA | Mendocino | 33 min |
Nearby
Severe Thunderstorm Warnings in California, 2009Every severe thunderstorm warning in 2009
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.