Flood and Strong Wind in California, January 1 to 2, 2006

Name: Flood and Strong Wind in California, January 1 to 2, 2006
Start: 2006-01-01T10:08
End: 2006-01-02T22:00
Location: California

January 1 to 2, 2006 · NWS HNX · 4 events in 3 counties and zones

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $2,000
Crop damage: None recorded
Events: 4

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.

What happened

The episode as NWS HNX wrote it up.

Rainfall in excess of 2 inches fell in a 30 hour period throughout Merced County. California Highway Patrol reported water over the roadway from stream flooding on La Grange Road NNE of the rural town of Snelling by 1050 PST on the 2nd. Gusty southeast wind commonly hit 40+ MPH during the late morning and early afternoon of the 1st in the northern portions of the Central San Joaquin Valley.

What forecasters said that day

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 Hanford, CA wrote its last area forecast discussion before the first event at Jan 1, 9:50 AM PST, 18 minutes earlier.

Area forecast discussion, Jan 1, 9:50 AM PST, 18 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
950 AM PST SUN JAN 1 2006

.UPDATE...FOR THE CENTRAL CALIFORNIA INTERIOR...THE BAROCLINIC LEAF
CONTINUES TO EXPAND AS IT MOVES ONTO THE CENTRAL CALIFORNIA COAST.
THE 12Z NAM/GFS/UKMET ALL HAVE 140+ KT 250-MB JET MAXES ASSOCIATED
WITH THE LEAF...AND THE NGM NOSES A 120+ KT JET MAX ONTO THE COAST.
VANDENBERG AFB RADAR SHOWS THE FIRST RAIN BAND MOVING ONSHORE FROM
MONTEREY BAY TO NORTHERN SANTA BARBARA COUNTY. IF THIS RAIN BAND
HOLDS TOGETHER AS IT CROSSES THE COASTAL RANGE...RAIN COULD REACH
LOS BANOS BY 19Z.

12Z MODEL QPF/S PUSH THE HIGHEST AMOUNTS INTO THE SOUTHERN HALF OF
THE HANFORD WARNING/FORECAST AREA...AND FORECASTED 700-MB
TEMPERATURES OF -5 TO -6 C BY 00Z TUESDAY SUGGEST SNOW LEVELS
BETWEEN 5500-6000 FEET BY MONDAY EVENING. WITH THE HIGHEST QPF
FOCUS FURTHER SOUTH...THE TULARE COUNTY MOUNTAINS COULD SEE MORE
SNOW OVER THE HIGHER ELEVATIONS THAN YOSEMITE. THE WINTER STORM
WARNING FOR THE SOUTHERN SIERRA NEVADA LOOKS ON TRACK.

ANOTHER CONCERN THIS MORNING IS THE WINDS. 12Z MODEL GUIDANCE PEAKS
GRADIENTS OVER THE CENTRAL CALIFORNIA INTERIOR TONIGHT...WITH WINDS
FORECAST TO REACH ADVISORY LEVELS AFTER MIDNIGHT. MAY NEED A WIND
ADVISORY FOR THE CENTRAL/SOUTHERN SAN JOAQUIN VALLEY WITH THE
AFTERNOON FORECAST PACKAGE.

.PREVIOUS DISCUSSION...

.SHORT TERM...QUITE A FEW ISSUES TO START OUT A NEW YEAR AS THE
FORECAST AREA WILL SEE SOME EXTREME WEATHER. EARLY THIS MORNING...
THINGS ARE RATHER TRANQUIL WITH SATELLITE AND RADAR IMAGES SHOWING
JUST SOME MID LEVEL CLOUDS MOVING IN FROM THE WEST. WATER VAPOR
IMAGERY SHOWS ONE NICELY FORMED LOW HEADING TOWARDS THE PACIFIC
NORTHWEST...WHILE ALONG 35N A BAND OF MOISTURE STRETCHES BACK TO
THE WEST AND IS BEGINNING TO MOVE INTO THE FORECAST AREA. AT THIS
TIME, THERE IS NO WELL DEVELOPED SYSTEM AIMED AT THE AREA...HOWEVER
A DEVELOPING BAROCLINIC LEAF IS NOTED JUST WEST OF 130W. ALL
FORECAST MODELS RAPIDLY DEVELOP A PRECIPITATION BAND LATER THIS
AFTERNOON ALONG 35N AND MOVE THIS INTO CENTRAL CALIFORNIA. I HAVE
DELAYED THE ONSET OF PRECIPITATION TO THIS AFTERNOON ALTHOUGH IT MAY
NOT GET GOING IN EARNEST UNTIL TONIGHT. SPEAKING OF TONIGHT...THINGS
GET VERY INTERESTING AS BOTH THE NAM AND GFS MODELS GENERATE VERY
HEAVY PRECIPITATION OVER MOST OF THE FORECAST AREA...AS THEY DRIVE A
VORTICITY CENTER TOWARDS THE COAST. A VERY STRONG JET ACCOMPANIES THE
INCOMING TROUGH AND EVEN THE LOWER LEVEL WINDS ARE PROGGED TO BE
STRONG. BOTH THE NAM AND GFS HAVE 700 MB /9000 FT/ WINDS AT OR NEAR
60 KNOTS. THERE IS ONE AREA WHERE THE MODELS DIVERGE CONSIDERABLY AND
THIS IS AT THE SURFACE. THE NAM MODEL DEVELOPS A STRONG SURFACE LOW
OVER NORTHERN CALIFORNIA AND HAS VERY STRONG GRADIENT WINDS OVER THE
KERN COUNTY MOUNTAINS AND SOUTH END OF THE SAN JOAQUIN VALLEY. THE
GFS MODEL HAS A MUCH WEAKER LOW AND LIGHTER PROJECTED WINDS. GIVEN
THAT BOTH MODELS HAVE SUCH STRONG FLOW IN THE MID LEVELS...I WILL OPT
TO ISSUE AND HIGH WIND WATCH FOR THE KERN COUNTY MOUNTAINS AS WELL AS
THE SOUTH END OF THE SAN JOAQUIN VALLEY FOR MONDAY. IF THESE WINDS DO
DEVELOP...THE BAKERSFIELD AREA MAY NOT GET MUCH RAIN...RATHER A VERY
WINDY DAY INSTEAD. IN THE SIERRA AND KERN COUNTY MOUNTAINS...THE
PROJECTED QPF IS VERY IMPRESSIVE. SNOW LEVELS WITH THIS STORM WILL BE
AT OR NEAR 7000 FEET...THUS PASSES WILL GET HEAVY RAIN. THE HIGHER
ELEVATIONS OF THE SIERRA COULD EASILY GET OVER 4 FEET OF SNOW AND
SOME LOCATIONS COULD SEE 5 FEET OF SNOW BY LATE MONDAY. ON MONDAY
NIGHT...THE TROUGH IS PROJECTED TO MOVE EAST OF THE AREA...BRINGING
AN END TO THE PRECIPITATION. WITH THE LOWER MOUNTAIN SLOPES AND
FOOTHILLS ALREADY HAVING SATURATED GROUND...THE HIGH QPF AMOUNTS
COULD CAUSE FLOODING AND THE FLOOD WATCH SEEMS FINE.

.LONG TERM...FOR TUESDAY NIGHT THROUGH SATURDAY...MEDIUM RANGE
MODELS IN FAIR AGREEMENT AND BUILD A LARGE DRY UPPER RIDGE ALONG
THE WEST COAST TUESDAY NIGHT THROUGH THURSDAY. THE RIDGE WILL KEEP
DRY WEATHER OVER ACROSS CENTRAL CALIFORNIA AS WELL AS MILD
TEMPERATURES OVER THE MOUNTAINS AND KERN DESERTS. TEMPERATURES IN
THE SAN JOAQUIN VALLEY MAY BE COOLER DUE AN INCREASING POTENTIAL
FOR DENSE FOG AND LOW STRATUS CLOUD DECK DEVELOPING IN THE VALLEY.
THIS SCENARIO COULD MINIMIZE THE AMOUNT OF DAY TIME CLEARING BUT
KEEP MINIMUM TEMPERATURES ABOVE THE FREEZING MARK. THE MAJORITY OF
MODELS SHOW A SHORTWAVE TROUGH PUSHING INTO THE PACIFIC NORTHWEST
FRIDAY AND FLATTENING OUT THE RIDGE FOR THE WEEKEND.  THE INVERSION
SHOULD WEAKEN INCREASING THE POTENTIAL FOR EARLIER FOG BURN OFF AND
AFTERNOON CLEARING IN THE SAN JOAQUIN VALLEY.

&&

.AVIATION... FOG WILL PROVIDE AREAS OF MVFR AND LOCAL IFR
VISIBILITIES OVER THE SAN JOAQUIN VALLEY AND SOUTHERN SIERRA
FOOTHILLS THROUGH 18Z SUNDAY. VFR CONDITIONS THROUGH 00Z MONDAY.
A PACIFIC STORM WILL AFFECT THE REGION TONIGHT. THIS WILL RESULT IN
MOUNTAIN OBSCURATION AND STRONG WINDS ACROSS THE SOUTHERN SIERRA AND
TEHACHAPI MOUNTAINS THROUGH 12Z MONDAY. AREAS OF RAIN AND GUSTY
WINDS OVER THE SAN JOAQUIN VALLEY WILL RESULT IN WIDESPREAD MVFR
CEILINGS THROUGH 12Z WITH LOCAL IFR VISIBILITIES IN HEAVIER RAIN
SHOWERS. FOR MORE SPECIFIC INFORMATION...SEE TAFS FOR
KFAT...KBFL...KMCE FOR DETAILS.

&&

&&

.HNX WATCHES/WARNINGS/ADVISORIES...FLOOD WATCH FOR THE CENTRAL AND
     SOUTHERN SAN JOAQUIN VALLEY...ADJACENT SIERRA SLOPES BELOW
     7000 FEET...AND THE KERN COUNTY MOUNTAINS AND DESERTS TONIGHT
     AND MONDAY.
     ...WINTER STORM WARNING FOR THE SOUTHERN SIERRA NEVADA NORTH OF
     KERN COUNTY LATE THIS AFTERNOON THROUGH MONDAY EVENING.
     ...HIGH WIND WATCH FOR THE KERN COUNTY MOUNTAINS LATE TONIGHT
     THROUGH MONDAY.
&&

WWW.WEATHER.GOV/HANFORD /USE ALL LOWER CASE/

SANGER/DUDLEY/MV

Hazardous weather outlook, Jan 1, 5:00 AM PST, 5 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
500 AM PST SUN JAN 1 2006

CAZ095-098-099-021300-
KERN COUNTY MOUNTAINS-INDIAN WELLS VALLEY-
SOUTHEASTERN KERN COUNTY DESERT-
500 AM PST SUN JAN 1 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE KERN COUNTY MOUNTAINS AND
DESERT.

.DAY ONE...TODAY

FLOOD WARNING IN EFFECT UNTIL NOON. PLEASE REFER TO THE LATEST
FLOOD STATEMENT SFOFLWHNX /WGUS46 KHNX/ FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

HIGH WIND WATCH IN EFFECT SUNDAY NIGHT THROUGH MONDAY AFTERNOON
FOR THE KERN COUNTY MOUNTAINS. PLEASE REFER TO THE LATEST WEATHER
MESSAGE SFONPWHNX /WWUS76 KHNX/ FOR FURTHER DETAILS. OTHERWISE NO
HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THEIR NATIONAL WEATHER SERVICE OFFICE.

CAZ089>094-098-099-021300-
WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY-
SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY-
MARIPOSA MADERA AND FRESNO COUNTY FOOTHILLS-TULARE COUNTY FOOTHILLS-
INDIAN WELLS VALLEY-SOUTHEASTERN KERN COUNTY DESERT-
500 AM PST SUN JAN 1 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL AND SOUTHERN SAN
JOAQUIN VALLEY AND ADJACENT FOOTHILLS.

.DAY ONE...TODAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

FLOOD WATCH IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY EVENING.
PLEASE REFER TO THE LATEST FLOOD WATCH STATEMENT SFOFFAHNX /WGUS66
KHNX/ FOR FURTHER DETAILS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THEIR NATIONAL WEATHER SERVICE OFFICE.

CAZ096-097-021300-
SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON-TULARE COUNTY MOUNTAINS-
500 AM PST SUN JAN 1 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SIERRA NEVADA FROM
YOSEMITE TO KINGS CANYON...AND THE TULARE COUNTY MOUNTAINS.

.DAY ONE...TODAY

A WINTER STORM WATCH IN EFFECT FROM THIS AFTERNOON THROUGH MONDAY
EVENING. PLEASE REFER TO THE LATEST WINTER WEATHER MESSAGE
SFOWSWHNX /WWUS46 KHNX/ FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THE WINTER STORM WATCH WILL CONTINUE UNTIL MONDAY EVENING.
A FLOOD WATCH IN EFFECT FROM THIS EVENING THROUGH MONDAY EVENING.
PLEASE REFER TO THE LATEST FLOOD WATCH STATEMENT SFOFFAHNX /WGUS66
KHNX/ FOR FURTHER DETAILS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THEIR NATIONAL WEATHER SERVICE OFFICE.

TLM

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 strong wind, 1 heavy rain, 1 flood. Local standard time, as filed.

Heavy Rain, Merced

When: January 1, 10:08 AM PST to January 2, 7:37 PM PST
Where: Merced County, Countywide
Reported by: OFFICIAL NWS OBS.
Coordinates: 37.192, -120.718 (the zone’s center; the record gives no point)

Strong Wind, W Central S.J. Valley

When: January 1, 5:30 PM PST to 8:02 PM PST
Where: W Central S.J. Valley forecast zone
Measured: 40 kt (46 mph) measured gust
Property damage: $1,000
Reported by: OFFICIAL NWS OBS.

Strong Wind, E Central S.J. Valley

When: January 1, 5:30 PM PST to 8:02 PM PST
Where: E Central S.J. Valley forecast zone
Measured: 39 kt (45 mph) measured gust
Property damage: $1,000
Reported by: AWOS,ASOS,MESONET,ETC

Flood, Merced

When: January 2, 2:00 AM PST to 10:00 PM PST
Where: Merced County, 3 mi NNE of Snelling
Reported by: LAW ENFORCEMENT
Coordinates: 37.567, -120.417

What these are

Heavy Rain: Rainfall totals unusual for the place and season that did not produce a flood.
Strong Wind: Non-thunderstorm winds below high wind criteria that nonetheless caused damage or casualties.
Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in California in 2006 Every state in 2006 This day in weather history Warnings in California, January 2006

Sources

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: 5491900, 5491901, 5491902, 5491899.