Isolated hail producing thunderstorms moved through the Big Bar area of Trinity County during a two day period.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS EKA wrote it up.
Isolated hail producing thunderstorms moved through the Big Bar area of Trinity County during a two day period.
The local office's own words before the first event, 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 the first event at Aug 22, 9:11 AM PST, 4 hours 49 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE EUREKA CA 1011 AM PDT THU AUG 22 2013 .SYNOPSIS...SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE TODAY AS AN UPPER LEVEL LOW LIFTS NORTHWARD. THIS WEEKEND...A COOLING TREND WILL PERSIST AND THE MARINE LAYER WILL DEEPEN AS A TROUGH APPROACHES THE COAST. && .UPDATE...ADJUSTED THE COVERAGE AND TIMING OF THUNDERSTORMS SLIGHTLY TODAY. ACTIVITY HAS BEEN SPARKING UP OVER SISKIYOU AND DEL NORTE COUNTIES THIS MORNING. A FEW STORMS WERE ALSO OCCURRING OVER SW TRINITY ALONG THE S FK MTNS. UPPER LEVEL LOW CURRENTLY OVER THE FORECAST AREA THIS MORNING WILL CONTINUE TO TRACK NORTHWARD THROUGH THE DAY. MODEL BASED SOUNDINGS CONTINUE TO SHOW DECENT INSTABILITY FOR A SECONDARY SPIKE IN TSTM ACTIVITY THIS AFTERNOON AND EARLY EVENING... MAINLY IN DEL NORTE COUNTY AND PERHAPS OVER THE HIGHER ELEVATIONS OF TRINITY. THUS WILL MAINTAIN THE RED FLAG WARNINGS FOR THE NORTHERN MOST FIRE WEATHER ZONES. ACTIVITY ACROSS MENDOCINO ZONES HAS BEEN NON-EXISTENT AND WILL REDUCE TSTM COVERAGE IN FIRE WX ZONE 277 TODAY AND REMOVE THE THREAT COMPLETELY FOR ZONES 276 AND 202. && .PREV DISCUSSION......ISSUED AT 603 AM PDT... .SHORT TERM...TODAY THROUGH SUN...AN UPPER LEVEL LOW OFF THE CALIFORNIA COAST IS ON A SOLID NORTHWARD TRACK BRINGING A CONTINUED THREAT OF THUNDERSTORMS TO THE REGION THROUGH THIS EVENING. WITH THE LOW EXPECTED TO POSITION OVER THE CWA LATER TODAY, THUNDERSTORMS ARE ANTICIPATED TO IGNITE OVER HIGHER TERRAIN ACROSS EASTERN DEL NORTE, TRINITY, AND NORTHERN MENDOCINO COUNTIES. AS THE LOW LIFTS NORTHWARD CHANCES WILL DECREASE IN SOUTHERN MENDOCINO, ALTHOUGH, THUNDERSTORMS OFFSHORE CAN POSSIBLY SWING BACK FROM THE WESTWARD SIDE OF THE LOW AND IMPACT COASTAL AREAS. MODELS HAVE THE LOW EJECTING OUT OF CALIFORNIA BY LATE TONIGHT BUT MAINTAINED A DOWNWARD TREND OF POPS INTO EARLY FRIDAY MORNING FOR THE CHANCE OF LINGERING SHOWERS. AS THE LOW GETS ABSORBED INTO THE UPPER LEVEL FLOW, A BROADER TROUGH WILL DIG OVER THE PACIFIC NW AND MAINTAIN A COOLING TREND ACROSS THE INTERIOR THROUGH THE WEEKEND. A WEAK BOUNDARY WILL ACCOMPANY THE TROUGH HOWEVER THE TROUGH LOOKS TOO DRY AND CONDITIONS TOO STABLE FOR ADDITIONAL SHOWERS OR STORMS OVER THE WEEKEND. OTHERWISE THE MARINE LAYER WILL DEEPEN ALLOWING FOG AND STRATUS TO PUSH DEEPER INLAND. DRIZZLE IS POSSIBLE WITH MORNING/EVENING CLOUD COVER ALONG THE COAST. KML .LONG TERM...MON THROUGH THURS... RELATIVELY QUIET EXTENDED FORECAST WITH NO PRECIPITATION EXPECTED. TEMPERATURES WILL REMAIN SLIGHTLY BELOW NORMAL WITH MID AND UPPER-LEVEL TROUGHING SITUATED OFF THE WEST COAST THROUGH THE PERIOD. A COUPLE SHORTWAVES WILL PASS BY, BUT MOISTURE AND INSTABILITY LOOKS TOO LIMITED FOR THUNDERSTORM ACTIVITY IN NW CALIFORNIA. COASTAL AREAS WILL LIKELY CONTINUE TO SEE OVERNIGHT AND MORNING LOW CLOUDS AND FOG GIVING WAY TO SUN MOST AFTERNOONS. AREAS SOUTH OF CAPE MENDOCINO SHOULD SEE MORE CLEAR SKIES EVEN DURING THE OVERNIGHTS WITH NORTHERLY LOW-LEVEL FLOW PERSISTING MUCH OF NEXT WEEK. AAD && .AVIATION...STRATUS WILL LIKELY BE VERY PERSISTENT TODAY, AND WITH A VERY LIGHT SOUTHERLY GRADIENT, SKIES WILL BE SLOW TO CLEAR IF AT ALL TODAY. MARINE LAYER WILL BE FAIRLY DEEP AS WELL, 1500 TO 2000 FT, AND INLAND AREAS WILL BE FIRST TO SEE GRADUAL EROSION. UPPER LOW PASSING BY ALOFT ADDS SOME UNCERTAINTY WITH POTENTIAL FOR DESTABILIZATION ABOVE THE MARINE LAYER...BUT WITH LIGHT WINDS ALOFT, EXPECT IT WILL BE DIFFICULT TO MIX DRIER AIR DOWN. VSBY UNDER THE STRATUS SHOULD IMPROVE FOR SEVERAL HOURS THIS AFTERNOON WITH CIGS COMING UP, BUT STAYING NEAR OR BELOW 1KFT. OTHER THREAT WILL BE ISOLATED SHOWERS AND THUNDERSTORMS, MAINLY NORTH OF CAPE MENDOCINO AND OVER THE INTERIOR HIGH TERRAIN. CONTINUED LOCALLY SMOKEY FROM FIRES AROUND NE HUMBOLDT AND NW TRINITY COUNTY. SKIES WILL BE HAZY ACROSS MANY INLAND LOCALES, BUT DO NOT EXPECT A SIGNIFICANT VISIBILITY REDUCTION OUTSIDE OF LOCALIZED AREAS CLOSE TO THE FIRES. WITH FLOW ALOFT BECOMING SOUTHWESTERLY THE NEXT FEW DAYS, SMOKE CONDITIONS WILL IMPROVE OVER MUCH OF NW CALIFORNIA. AAD && .MARINE...06Z ASCAT PASS SHOWED LGT VRB WINDS ACROSS THE WATERS. THIS WILL CONTINUE TODAY AS THE PRES GRADIENT REMAINS WEAK. ISOLD TSTMS REMAIN POSSIBLE THROUGH THE AFTERNOON AS THE UPPER LOW MOVES N TODAY. PRES GRADIENT WILL BEGIN TO TIGHTEN OVERNIGHT INTO FRI AS HIGH PRES OFFSHORE SHIFTS E. STRONGEST NLY WINDS WILL BE OFFSHORE S OF CAPE MENDO WHERE MARGINAL ADVISORY CONDITIONS WILL OCCUR. CONDITIONS WILL EASE SOME THIS WEEKEND WITH LGT-MDT WINDS AND SEAS PREVAILING INTO NEXT WEEK. BC && .FIRE WEATHER...THE THREAT OF ISOLATED TO SCATTERED THUNDERSTORMS CONTINUES THROUGH THIS AFTERNOON AS THE UPPER LEVEL LOW LIFTS NORTHWARD. STORMS ARE ANTICIPATED TO IGNITE OVER HIGHER TERRAIN ACROSS EASTERN DISTRICTS AND PROPAGATE TOWARDS THE COAST. CHANCES FOR STORMS ACROSS SOUTHERN MENDOCINO ARE LOWER TODAY AS THE LOW LIFTS TO THE NORTH SO ALLOWED THE RED FLAG WARNING TO DROP OFF AT 12Z FOR FWZ276. THE THREAT FOR NEW FIRE STARTS WILL DECREASE INTO THE WEEKEND AS THE LOW GETS ABSORBED IN THE UPPER LEVEL FLOW. A BROADER TROUGH WILL DIG OVER THE PACIFIC NW THROUGH THE WEEKEND BUT MOISTURE AND INSTABILITY WILL BE TOO LIMITED FOR ANY SHOWERS OR STORMS TO DEVELOP IN NW CALIFORNIA. && .EKA WATCHES/WARNINGS/ADVISORIES... CA...RED FLAG WARNING UNTIL 8 PM PDT THIS EVENING CAZ003-004-076. NORTHWEST CALIFORNIA COASTAL WATERS...NONE. && VISIT US AT HTTP://WWW.WEATHER.GOV/EUREKA FOLLOW US ON FACEBOOK AND TWITTER AT: HTTP://WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.EUREKA.GOV HTTP://WWW.TWITTER.COM/NWSEUREKA
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EUREKA CA 533 AM PDT THU AUG 22 2013 CAZ001-231245- REDWOOD COAST- 533 AM PDT THU AUG 22 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE. FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR WEATHER.GOV/EUREKA. CAZ002-231245- MENDOCINO COAST- 533 AM PDT THU AUG 22 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE. FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR WEATHER.GOV/EUREKA. CAZ003-231245- NORTH COAST INTERIOR- 533 AM PDT THU AUG 22 2013 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM PDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA. .DAY ONE...TODAY AND TONIGHT. A RED FLAG WARNING IS IN EFFECT. ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE. SMOKE MAY BECOME DENSE IN VALLEY LOCATIONS OVERNIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE. FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR WEATHER.GOV/EUREKA. CAZ076-231245- MENDOCINO INTERIOR- 533 AM PDT THU AUG 22 2013 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM PDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA. .DAY ONE...TODAY AND TONIGHT. A RED FLAG WARNING IS IN EFFECT. ISOLATED THUNDERSTORMS WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE. FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR WEATHER.GOV/EUREKA. CAZ004-231245- UPPER TRINITY RIVER- 533 AM PDT THU AUG 22 2013 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM PDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA. .DAY ONE...TODAY AND TONIGHT. A RED FLAG WARNING IS IN EFFECT. ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE. FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR WEATHER.GOV/EUREKA.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
1041 AM PDT THU AUG 22 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1036 AM HAIL GASQUET 41.85N 123.97W
08/22/2013 M0.25 INCH DEL NORTE CA PUBLIC
RETIRED WEATHER SPOTTER REPORTED HEAVY RAIN IN A
THUNDERSTORM WITH LIGHTNING AND SMALL HAIL. BEEN HEARING
THUNDER AT A DISTANT FOR ALMOST AN HOUR.
&&
ASHFORDSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
1208 PM PDT THU AUG 22 2013
CAZ001-003-221930-
DEL NORTE CA-
1208 PM PDT THU AUG 22 2013
THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
NORTHWESTERN DEL NORTE COUNTY IN NORTHWEST CALIFORNIA
UNTIL 1230 PM PDT
AT 1201 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES SOUTHEAST OF CRESCENT CITY...MOVING
NORTHWEST AT 20 MPH.
PEA SIZE HAIL IS EXPECTED WITH THIS STORM.
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
LAT...LON 4167 12393 4161 12412 4166 12415 4173 12417
4174 12422 4177 12427 4190 12421 4199 12422
4200 12421 4200 12408
TIME...MOT...LOC 1906Z 157DEG 21KT 4173 12410
MFMSPECIAL WEATHER STATEMENT
223 PM PDT THU AUG 22 2013
CAZ003-222200-
DEL NORTE CA-
223 PM PDT THU AUG 22 2013
THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
NORTHEASTERN DEL NORTE COUNTY IN NORTHWEST CALIFORNIA
UNTIL 300 PM PDT
AT 217 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES WEST OF HAPPY CAMP...MOVING NORTHWEST AT
15 MPH.
DIME SIZE HAIL AND LOCALLY GUSTY WINDS ARE EXPECTED WITH THIS
STORM....ALONG WITH FREQUENT LIGHTNING.
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
LAT...LON 4199 12352 4199 12353 4196 12352 4191 12355
4188 12360 4188 12364 4184 12366 4183 12369
4181 12370 4200 12395 4201 12352
TIME...MOT...LOC 2122Z 151DEG 15KT 4187 12359
STPSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
224 PM PDT THU AUG 22 2013
CAZ003-222200-
DEL NORTE CA-
224 PM PDT THU AUG 22 2013
THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
NORTHEASTERN DEL NORTE COUNTY IN NORTHWEST CALIFORNIA
UNTIL 300 PM PDT
AT 217 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES WEST OF HAPPY CAMP...MOVING NORTHWEST AT
15 MPH.
DIME SIZE HAIL AND LOCALLY GUSTY WINDS ARE EXPECTED WITH THIS
STORM....ALONG WITH FREQUENT LIGHTNING.
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
LAT...LON 4199 12352 4199 12353 4196 12352 4191 12355
4188 12360 4188 12364 4184 12366 4183 12369
4181 12370 4200 12395 4201 12352
TIME...MOT...LOC 2122Z 151DEG 15KT 4187 12359
STPSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EUREKA CA 247 PM PDT THU AUG 22 2013 CAZ004-222230- TRINITY CA- 247 PM PDT THU AUG 22 2013 THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... CENTRAL TRINITY COUNTY IN NORTHWEST CALIFORNIA UNTIL 330 PM PDT AT 244 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR BIG BAR...MOVING NORTHEAST AT 10 MPH. DIME SIZE HAIL IS EXPECTED WITH THIS STORM....ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. LAT...LON 4091 12339 4089 12310 4064 12316 4066 12340 TIME...MOT...LOC 2146Z 234DEG 9KT 4074 12326 MFM
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
256 PM PDT THU AUG 22 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0251 PM HAIL 2 ENE BIG BAR 40.74N 123.21W
08/22/2013 M0.50 INCH TRINITY CA TRAINED SPOTTER
AT BIG FLAT NEAR BIG BAR...TRINITY COUNTY REPORTED STRONG
THUNDERSTORM WITH MODERATE TO HEAVY RAIN...DIME SIZE HAIL
AND FREQUENT LIGHTNING. HAS BEEN THUNDERING FOR NEARLY 1
HOUR
&&
ASHFORDThe Eureka (Bunker Hill) radar (KBHX), 92 km away, was scanning. The volume nearest the first event began at 21:59 UTC.
1 hail. Local standard time, as filed.
A thunderstorm impacted Big Bar and produced a hail event that lasted for 30 minutes. The estimated hail size was as large as a golf ball. The hail covered the ground to a depth of 2 inches with drifts up to 6 inches deep.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2013Every state in 2013This day in weather historyWarnings in California, August 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 475440.