Winter Storm, S Sierra Mtns
- When
- March 31, 1:00 PM PST to 11:59 PM PST
- Where
- S Sierra Mtns forecast zone
- Reported by
- Trained Spotter
The next upper level low arrived to the region on the night of March 27th-28th after a brief dry period between storm systems. This storm stayed mainly over northern California, and brought only light precipitation to the region.
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 HNX wrote it up.
The next upper level low arrived to the region on the night of March 27th-28th after a brief dry period between storm systems. This storm stayed mainly over northern California, and brought only light precipitation to the region. A stronger storm arrived on the last day of the month, bringing heavier precipitation to the region. Rainfall amounts for March 31st-April 1st were between a quarter and a half inch of rain for the central San Joaquin Valley, and between a tenth and a quarter of an inch for the south Valley. The exception was the southwest part of the San Joaquin Valley, which was rain-shadowed and received only a few hundredths of an inch of rain. In the Southern Sierra Nevada, snowfall amounts over the high country generally were between 5 and 9 inches, although a couple of sites in Tulare County had around a foot of new snow. Gusty southeast winds developed ahead of the cold front, with gusts of 35 to 45 mph in the central and southern San Joaquin Valley, and 58 to 62 mph in the Kern County deserts. A large tree branch fell on an SUV in southwest Bakersfield.
The above-normal rainfall for March (except at Merced) helped put a dent in the rainfall deficit for the 2011-2012 season. When March began, Bakersfield was at 45.5 percent of normal, and Fresno was at 47.0 percent. At the end of March, Bakersfield had improved to 58.2 percent of normal, and Fresno was at 61.9 percent of normal.
(See the table on the next page.)
THE 2011-2012 RAIN SEASON THROUGH MARCH 31ST|/AMOUNTS IN INCHES/|SITE MAR NRML DEP PCT SEASON NORMAL DEP PCT|2012 MAR* NRML 3/31 3/31* NRML|MERCED AIRPORT 2.02 2.07 -0.05 97.6 5.33 10.84 -5.51 49.2|MERCED CITY 1.89 2.07 -0.18 91.3 5.66 11.48 -5.82 49.3|MADERA AIRPORT 3.23 1.80 1.43 179.4 6.28 10.40 -4.12 60.4|FRESNO 2.43 2.03 0.40 119.7 6.13 9.91 -3.78 61.9|HANFORD AIRPORT 1.72 1.63 0.09 105.5 4.00 8.74 -4.74 45.8|HANFORD CITY 1.75 1.65 0.10 106.1 4.32 7.83 -3.51 55.2|BAKERSFIELD 1.27 1.21 0.06 105.0 3.31 5.69 -2.38 58.2|* NORMALS FOR BAKERSFIELD...FRESNO...HANFORD CITY AND MERCED CITY ARE|FOR 1981-2010.|NORMALS FOR HANFORD...MADERA AND MERCED AIRPORTS ARE FOR 2001-2010.
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 Mar 31, 8:25 AM PST, 4 hours 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 925 AM PDT SAT MAR 31 2012 .SYNOPSIS... LOW PRESSURE AND ASSOCIATED FRONTAL SYSTEM WILL MOVE THROUGH CENTRAL CALIFORNIA THIS WEEKEND...BRINGING VALLEY RAIN...MOUNTAIN SNOW AND GUSTY WINDS OVER THE FORECAST AREA. && .DISCUSSION... SATELLITE LOOPS SHOW THE UPPER-LEVEL LOW NEAR 40N/130W...WEST OF POINT CONCEPTION THIS MORNING. RADAR LOOPS AND SURFACE OBSERVATIONS SHOW THAT PRECIPITATION HAS REACHED THE SAN FRANCISCO BAY AREA...AND WINDS HAVE ALREADY GUSTED TO 30 KTS AT MOFFETT FIELD. EXPECT THE PRECIPITATION TO REACH THE NORTHERN PARTS OF THE HANFORD WARNING/ FORECAST AREA AROUND 18Z /1100 PDT/ TODAY...THEN SPREAD SOUTH THIS AFTERNOON. AHEAD OF THE COLD FRONT...SOUTHEAST WINDS WILL CONTINUE TO INCREASE. HAVE ALREADY SEEN GUSTS TO 46 MPH AT THE PANOCHE ROAD RAWS...AND 43 MPH AT THE TWISSELMAN RAWS. THE WIND ADVISORY FOR THE CENTRAL AND SOUTHWESTERN SAN JOAQUIN VALLEY IS ON TRACK FOR TODAY. WINDS WILL INCREASE OVER THE KERN COUNTY MOUNTAINS AND DESERTS THIS AFTERNOON AS THE FRONT MOVES THROUGH KERN COUNTY. SPC HAS MERCED COUNTY AND ADJACENT PORTIONS OF FRESNO...MADERA AND MARIPOSA COUNTIES UNDER A GENERAL RISK OF THUNDERSTORMS TODAY. THE 12Z NAM-12 HAS MAXIMUM CAPES OVER THE CENTRAL SAN JOAQUIN VALLEY OF 210+ JOULES/KG THIS AFTERNOON AND EVENING...AND A VERY STRONG 500-MB THERMAL GRADIENT OVER THE CENTRAL SAN JOAQUIN VALLEY AT 03Z SUNDAY /2000 PDT TODAY/. HAVE UPDATED THE FORECAST TO ADD A SLIGHT CHANCE OF THUNDERSTORMS FOR 18Z TODAY-03Z SUNDAY WITH SMALL HAIL. && .PREV DISCUSSION... /ISSUED 350 AM PDT SAT MAR 31 2012/ COLD FRONTAL SYSTEM CONTINUE TO PUSH EASTWARD THIS MORNING AND IS STARTING TO MOVE INTO THE PACIFIC NORTHWEST. SATELLITE IR IMAGERY SHOWS THE CENTER OF THE SURFACE LOW ABOUT 250 MILES WEST AND ALSO MOVING EASTWARD. TIMING OF THE FRONTAL ZONE INTO THE REGION IS STILL EXPECTED LATER THIS MORNING WITH PRECIP EXPECTED NEAR NOON. SHORT RANGE MODELS PROG THE PRECIP TO OVERSPREAD THE DISTRICT DURING THE DAY WITH PRECIP REACHING KERN COUNTY THIS EVENING. SATELLITE PRECIPITABLE WATER CHARTS STILL SHOWING A GOOD FETCH OF SUBTROPICAL MOISTURE ASSOCIATED WITH THE FRONTAL SYSTEM AND NEAR 1 INCH OF WATER COULD HIT THE DISTRICT. YET...120KT 250MB JET DRIVING THE COLD AIR TOWARD CENTRAL CALIFORNIA MAY BREAK THE SUBTROPICAL MOISTURE CONNECTION AND LIMIT THE AMOUNT OF MOISTURE PUSHING INTO THE DISTRICT TODAY. HOWEVER...WILL MAINTAIN THE HIGHER MOUNTAIN PRECIP ACCUMULATION VALUES DUE TO GOOD OROGRAPHIC LIFT. THEREFORE...WILL KEEP THE WINTER WEATHER PRODUCTS IN EFFECT AS MODEL WATER ACCUMULATION SHOW BETWEEN A 1/2 TO 3/4 OF AN INCH OF WATER OVER THE HIGH COUNTY OF THE SIERRA NEVADA AND ALMOST A 1/2 INCH FROM MERCED TO FRESNO. BY SATURDAY NIGHT...SHORT RANGE PROGS SHOW THE FRONTAL ZONE EXITING THE REGION AS CONDITIONS BEGIN TO QUIET DOWN. BY DAYBREAK ON SUNDAY...WILL ONLY EXPECT LINGER CLOUDS AND LIGHT PRECIP NEAR THE GRAPEVINE. SUNDAY EVENING THE SEE MOST OF THE DISTRICT CLEARING OUT. IN ADDITION TO THE PRECIP...MODELS ALSO SHOW STRONG WINDS DEVELOPING AHEAD OF THE FRONTAL SYSTEM...FIRST ACROSS THE SAN JOAQUIN VALLEY...AND SECOND ACROSS THE KERN COUNTY MOUNTAINS AND DESERTS. WILL THEREFORE MAINTAIN THE WIND PRODUCTS ACROSS THE DISTRICT AS WIND ADVISORY LEVEL CRITERIA COULD BE MET AS A STRONG TEMPERATURE GRADIENT COULD BE OBSERVED AHEAD OF THE COLD FRONTAL PASSAGE. AFTERWARD...ANOTHER TROUGH OF LOW PRESSURE WILL DIG OVER THE REGION BY MIDWEEK AND POSSIBLY DEEPEN BEFORE THE END OF THE WEEK. AT THIS POINT...WILL ONLY EXPECT COOLER TEMPS AND A VERY SLIGHT CHANCE OF UNSETTLED WEATHER...MAINLY OVER THE SIERRA. WILL GO WITH THE FASTER ECMWF SOLUTION WHICH IS LESS INTENSE WITH THE STORM. && .AVIATION... IN THE SOUTHERN SIERRA NEVADA AND TEHACHAPI MOUNTAINS...WIDESPREAD IFR IN CLOUDS/PRECIP SPREADING SOUTH FROM YOSEMITE PARK...REACHING THE TEHACHAPI MTNS AROUND 00Z SUNDAY. IFR/LIFR CONDS CONTINUING THRU 18Z SUN. IN THE SAN SAN JOAQUIN VALLEY...VFR WITH CIGS AT OR BELOW 5000 FT AGL AND AREAS OF -RA SPREADING SOUTH AFTER 20Z SAT. ISOLATED TSRA WITH SMALL HAIL POSSIBLE THROUGH 03Z SUN. PATCHY IFR CIGS/VIS IN AREAS OF -RABR THRU 12Z SUN...BECOMING VFR EXCEPT PATCHY IFR CONDS CONTINUING IN THE SOUTH END THROUGH 18Z SUN. IN THE DESERTS OF KERN COUNTY...VFR PREVAILING THRU 18Z SUN. && .AIR QUALITY ISSUES... NONE. && .HNX WATCHES/WARNINGS/ADVISORIES... WINTER WEATHER ADVISORY FROM 2 PM THIS AFTERNOON TO 5 AM PDT SUNDAY ABOVE 7000 FEET FOR THE TULARE COUNTY MOUNTAINS /CAZ097/. WINTER STORM WARNING FROM 2 PM THIS AFTERNOON TO 5 AM PDT SUNDAY ABOVE 7000 FEET FOR THE SOUTHERN SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON /CAZ096/. WINTER WEATHER ADVISORY FROM 11 PM THIS EVENING TO 11 AM PDT SUNDAY ABOVE 5000 FEET FOR THE KERN COUNTY MOUNTAINS /CAZ095/. WIND ADVISORY FROM 2 PM THIS AFTERNOON TO 11 PM PDT THIS EVENING FOR THE KERN COUNTY MOUNTAINS /CAZ095/. WIND ADVISORY UNTIL 7 PM PDT THIS EVENING FOR THE CENTRAL AND SOUTHWESTERN SAN JOAQUIN VALLEY /CAZ089>091/. WIND ADVISORY FROM 2 PM THIS AFTERNOON TO 11 AM PDT SUNDAY FOR THE KERN COUNTY DESERTS /CAZ098-099/. && PUBLIC...SANGER AVN/FW...MENDENHALL SYNOPSIS...PJ PREV DISCUSSION...MOLINA WEATHER.GOV/HANFORD
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 1149 AM PDT SAT MAR 31 2012 CAZ096-011900- SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON- 1149 AM PDT SAT MAR 31 2012 ...EARLY SPRING SNOW... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHERN SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON. .DAY ONE...THIS AFTERNOON AND TONIGHT A WINTER STORM WARNING ABOVE 7000 FEET IS IN EFFECT FROM 2 PM TODAY TO 5 AM PDT SUNDAY. PLEASE SEE THE LATEST /SFOWSWHNX/ FOR DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE WINTER STORM WARNING WILL REMAIN IN EFFECT UNTIL 5 AM SUNDAY. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ095-011900- KERN COUNTY MOUNTAINS- 1149 AM PDT SAT MAR 31 2012 ...WINTER WEATHER ADVISORY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE KERN COUNTY MOUNTAINS. .DAY ONE...THIS AFTERNOON AND TONIGHT A WINTER WEATHER ADVISORY ABOVE 5000 FEET IS IN EFFECT FROM 11 PM TODAY TO 11 AM PDT SUNDAY. PLEASE SEE THE LATEST /SFOWSWHNX/ FOR DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE WINTER WEATHER ADVISORY WILL REMAIN IN EFFECT UNTIL 11 AM SUNDAY. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ097-011900- TULARE COUNTY MOUNTAINS- 1149 AM PDT SAT MAR 31 2012 ...WINTER WEATHER ADVISORY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TULARE COUNTY MOUNTAINS. .DAY ONE...THIS AFTERNOON AND TONIGHT A WINTER WEATHER ADVISORY ABOVE 7000 FEET IS IN EFFECT FROM 2 PM TODAY TO 5 AM PDT SUNDAY. PLEASE SEE THE LATEST /SFOWSWHNX/ FOR DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE WINTER WEATHER ADVISORY WILL REMAIN IN EFFECT UNTIL 5 AM SUNDAY. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ089>092-011900- WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY- SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY- 1149 AM PDT SAT MAR 31 2012 ...WINDY CONDITIONS ALONG WITH THUNDERSTORMS... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL AND SOUTHERN SAN JOAQUIN VALLEY. .DAY ONE...THIS AFTERNOON AND TONIGHT A WIND ADVISORY IS IN EFFECT FROM 8 AM TO 7 PM PDT TODAY. PLEASE SEE THE LATEST /SFONPWHNX/ FOR DETAILS. THERE IS ALSO A SLIGHT CHANCE OF THUNDERSTORMS IN THE SAN JOAQUIN VALLEY .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ098-011900- INDIAN WELLS VALLEY- 1149 AM PDT SAT MAR 31 2012 ...DESERT WINDS... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE INDIAN WELLS VALLEY. .DAY ONE...THIS AFTERNOON AND TONIGHT A WIND ADVISORY IS IN EFFECT FROM 2 PM TODAY TO 11 AM PDT SUNDAY. PLEASE SEE THE LATEST /SFONPWHNX/ FOR DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE WIND ADVISORY WILL REMAIN IN EFFECT UNTIL 11 AM SUNDAY. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ099-011900- SOUTHEASTERN KERN COUNTY DESERT- 1149 AM PDT SAT MAR 31 2012 ...DESERT WINDS EXTENDED... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHEASTERN KERN COUNTY DESERT. .DAY ONE...THIS AFTERNOON AND TONIGHT A WIND ADVISORY IS IN EFFECT FROM 2 PM TODAY TO 7 PM PDT SUNDAY. PLEASE SEE THE LATEST /SFONPWHNX/ FOR DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE WIND ADVISORY WILL REMAIN IN EFFECT UNTIL 7 PM SUNDAY. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. JONES
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
1114 AM PDT SAT MAR 31 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0850 AM NON-TSTM WND GST KETTLEMAN HILLS 36.03N 120.06W
03/31/2012 M35.00 MPH KINGS CA MESONET
KETTLEMAN HILLS RAWS.
0952 AM NON-TSTM WND GST 3 W LEMOORE 36.30N 119.84W
03/31/2012 M35.00 MPH KINGS CA ASOS
NAVAL AIR STATION LEMOORE.
1014 AM NON-TSTM WND GST CRANE FLAT 37.76N 119.82W
03/31/2012 M46.00 MPH TUOLUMNE CA MESONET
CRANE FLAT RAWS.
1047 AM NON-TSTM WND GST MERCED 37.30N 120.48W
03/31/2012 M38.00 MPH MERCED CA ASOS
MERCED REGIONAL AIRPORT /KMCE/.
&&
SANGERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
1134 AM PDT SAT MAR 31 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1109 AM NON-TSTM WND GST S AVENAL 36.03N 120.11W
03/31/2012 M37 MPH KINGS CA MESONET
&&
PJONPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
1225 PM PDT SAT MAR 31 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1150 AM NON-TSTM WND GST KETTLEMAN HILLS 36.03N 120.06W
03/31/2012 E44 MPH KINGS CA MESONET
&&
PJONPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
1245 PM PDT SAT MAR 31 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1229 PM NON-TSTM WND GST 6 W LOS BANOS 37.06N 120.94W
03/31/2012 E36 MPH MERCED CA MESONET
&&
PJONPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
1249 PM PDT SAT MAR 31 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1231 PM NON-TSTM WND GST SAN LUIS RESERVOIR 37.07N 121.07W
03/31/2012 E36 MPH MERCED CA MESONET
&&
PJONPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
117 PM PDT SAT MAR 31 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1250 PM NON-TSTM WND GST KETTLEMAN HILLS 36.03N 120.06W
03/31/2012 E51 MPH KINGS CA MESONET
&&
PJON2 winter storm. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2012Every state in 2012This day in weather historyWarnings in California, March 2012
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: 374824, 374825.