Alert archive / California / River Flood Warnings in 2012
River Flood Warning 1, NWS Hanford, CA
NWS Hanford, CA issued this river flood warning at Dec 2, 2012, 8:52 AM PST for Mariposa County, California. It took effect at Dec 2, 2012, 4:00 PM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 2, 2012, 8:52 AM PST (16:52 UTC)
- In effect from
- Dec 2, 2012, 4:00 PM PST
- Expired
- Dec 2, 2012, 2:26 PM PST
- In force
- Issued by
- NWS Hanford, CA
- Flood severity
- Minor
County Mariposa County, CA
The radar
The San Joaquin Valley radar (KHNX), 143 km from the middle of the area, began a volume at 16:55 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.
The river
Written for the forecast point Merced River at Pohono Bridge (POHC1). The gauge peaked at 5.85 ft at Dec 2, 2012, 6:00 PM PST.
- Minor stage
- 10 ft
- Moderate stage
- 12.5 ft
- Major stage
- 20 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 11266500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The text
As transmitted, in the capitals the NWS used until 2016.
766 WGUS46 KHNX 021652 FLWUSJ BULLETIN - IMMEDIATE BROADCAST REQUESTED FLOOD WARNING NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 852 AM PST SUN DEC 2 2012 ...THE NATIONAL WEATHER SERVICE IN HANFORD HAS ISSUED A FLOOD WARNING FOR THE FOLLOWING RIVERS IN CALIFORNIA... MERCED RIVER AT POHONO BRIDGE .HEAVY RAIN IS EXPECTED TODAY WHICH WILL RESULT IN RAPID RISES ON THE MERCED RIVER IN YOSEMITE VALLEY. FORECASTS ARE BASED ON PRESENT AND FORECASTED METEOROLOGICAL AND HYDROLOGIC CONDITIONS AT TIME OF ISSUANCE. PRECAUTIONARY/PREPAREDNESS ACTIONS... UNLISTED FORECAST POINTS ARE EXPECTED TO REMAIN BELOW MONITOR STAGE. ALL THOSE AFFECTED BY RIVER CONDITIONS SHOULD REMAIN ALERT FOR RAPID CHANGES AND FOR POSSIBLE FORECAST REVISIONS. FOR MORE HYDROLOGIC INFORMATION AND STAGE DEFINITIONS REFER TO THE FOLLOWING WEB SITE (ALL LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/HNX/HYDRO.PHP && CAC043-031852- /O.NEW.KHNX.FL.W.0001.121203T0000Z-121203T2012Z/ /POHC1.1.ER.121203T0000Z.121203T0100Z.121203T0212Z.NO/ 852 AM PST SUN DEC 2 2012 THE NATIONAL WEATHER SERVICE IN HANFORD HAS ISSUED A * FLOOD WARNING FOR THE MERCED RIVER AT POHONO BRIDGE. * FROM THIS AFTERNOON TO MONDAY AFTERNOON...OR UNTIL THE WARNING IS CANCELLED. * AT 8:00 AM SUNDAY THE STAGE WAS 3.3 FEET. * MINOR FLOODING IS FORECAST. * EXPECTED TO RISE ABOVE FLOOD STAGE OF 10.0 FT LATE THIS AFTERNOON THEN FORECAST TO CREST NEAR 10.5 FT LATE THIS AFTERNOON THEN FORECAST TO FALL BELOW FLOOD STAGE OF 10.0 FT THIS EVENING THEN FORECAST TO RECEDE TO NEAR 5.5 FT TOMORROW MORNING. * FLOOD STAGE 10.0 FT * IMPACT...NEAR 10.5 FEET, WATER TOPS THE SWINGING BRIDGE DOWNSTREAM FROM CHAPEL MEADOW. OVERFLOW FROM WOSKI POND FLOODS ACCESS ROAD(NORTHSIDE DRIVE) LEADING OUT OF THE WEST ENTRANCE OF THE PARK. * IMPACT...NEAR 10.0 FEET, WESTERN PORTION OF NORTH PINES CAMPGROUND...LOCATED AT THE EAST END OF YOSEMITE VALLEY BETWEEN THE CONFLUENCE OF THE MERCED RIVER AND TENAYA CREEK...BEGINS TO FLOOD. WATER RISES TO THE BASE OF THE SWINGING BRIDGE DOWNSTREAM FROM CHAPEL MEADOW. * IMPACT...NEAR 9.5 FEET, PORTION OF LOWER PINES CAMPGROUND BECOMES FLOODED. LIMITED SITE-SPECIFIC EVACUATIONS BEGIN AT HOUSEKEEPING CAMP LOCATED ALONG THE SOUTH-FACING BANK OF THE MERCED RIVER. (UPSTREAM FROM SENTINEL BRIDGE AND DOWNSTREAM FROM STONEMAN BRIDGE) * IMPACT...NEAR 9.0 FEET, CHAPEL MEADOW (SOUTH SIDE OF RIVER) AND COOKS MEADOW (NORTH SIDE OF RIVER) BEGINS TO EXPERIENCE OVERFLOW. * IMPACT...NEAR 6.5 FEET, RIVER IS CLOSED TO RAFTERS AND FLOTATION. $$ CB
1 follow-up statement
595 WGUS86 KHNX 022226 FLSUSJ FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 226 PM PST SUN DEC 2 2012 ...FLOOD WARNING FOR THE MERCED RIVER AT POHONO BRIDGE HAS BEEN CANCELLED... .RAIN HAS BEGUN TO TAPER OFF AND FLOODING IS NO LONGER EXPECTED. THUS...THE FLOOD WARNING IS NO LONGER IN EFFECT. FORECASTS ARE BASED ON PRESENT AND FORECASTED METEOROLOGICAL AND HYDROLOGIC CONDITIONS AT TIME OF ISSUANCE. PRECAUTIONARY/PREPAREDNESS ACTIONS... UNLISTED FORECAST POINTS ARE EXPECTED TO REMAIN BELOW MONITOR STAGE. ALL THOSE AFFECTED BY RIVER CONDITIONS SHOULD REMAIN ALERT FOR RAPID CHANGES AND FOR POSSIBLE FORECAST REVISIONS. FOR MORE HYDROLOGIC INFORMATION AND STAGE DEFINITIONS REFER TO THE FOLLOWING WEB SITE (ALL LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/HNX/HYDRO.PHP && CAC043-022256- /O.CAN.KHNX.FL.W.0001.000000T0000Z-121203T2012Z/ /POHC1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/ 226 PM PST SUN DEC 2 2012 THE FLOOD WARNING IS CANCELLED FOR THE MERCED RIVER AT POHONO BRIDGE. * AT 2:00 PM SUNDAY THE STAGE WAS 4.9 FEET. * FORECAST TO RECEDE TO NEAR 4.0 FT TOMORROW EARLY AFTERNOON. * FLOOD STAGE 10.0 FT * MONITOR STAGE MSG FT, $$
What forecasters said that day
The local office's own words before this river flood warning went out, 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 this river flood warning went out at Dec 2, 8:17 AM PST, 35 minutes earlier.
Area forecast discussion, Dec 2, 8:17 AM PST, 35 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 817 AM PST SUN DEC 2 2012 .SYNOPSIS... SCATTERED SHOWERS EARLY THIS MORNING WILL EVOLVE IN TO A STEADY RAIN BEFORE NOON FROM FRESNO NORTH. THE RAIN WILL SPREAD SOUTH DURING THE AFTERNOON. PERIODS OF HEAVY RAIN ARE POSSIBLE FROM FRESNO NORTH INCLUDING THE SIERRA NORTH OF KINGS CANYON. THE RAIN WILL DIMINISH IN THE NORTH THIS EVENING...AND GRADUALLY ENDING IN KERN COUNTY NEAR DAYBREAK MONDAY. && .DISCUSSION...RADAR SHOWS THE BIG AREA OF HEAVY RAIN NOW JUST MOVING INTO YOSEMITE AND MERCED COUNTY. RAINFALL RATES WILL REALLY RAMP UP OVER THE NEXT SEVERAL HOURS AS THE SYSTEM MOVES TO THE SOUTHEAST. SNOW LEVEL REMAINS HIGH...AT OR ABOVE 9500 FEET BASED ON OAKLAND SOUNDING AND BUCK ROCK APRS (ELEVATION 8500 FEET TEMPERATURE 37 DEGREES). FLOOD WATCH AND WIND ADVISORIES REMAIN IN EFFECT. FORECAST GRIDS HAVE BEEN TWEAKED FOR LATEST QPF. LET IT RAIN. && .PREV DISCUSSION... /ISSUED 421 AM PST SUN DEC 2 2012/ DISCUSSION... BAROCLINIC LEAF RAPIDLY DEVELOPING EARLY THIS MRNG FROM NORCAL SW IN INTO THE PACIFIC AROUND 35N. TRIPLE POINT COMING ASHORE NEAR CAPE MENDO. SCT SHWRS IN CENTRAL CA OVER NITE WILL BE REPLACED SHORTLY WITH MORE STEADY RAIN NEAR KMCE AROUND DAYBREAK SPREADING SOUTH TO KFAT BEFORE NOON...AND FINALLY INTO KERN COUNTY MID-LATE AFTN. HEAVY RAIN IS POSSIBLE AT TIMES...ESP KFAT NORTH...WITH LESSER AMOUNTS IN KINGS/TULARE CNTYS. MODEL QPF RANGES FROM 1-2 INCHES ON THE VALLEY FLOOR FROM KFAT NORTH...3 INCHES AROUND YNP DROPPING OFF TO AROUND 1 INCH IN KINGS CANYON. AS THE SYS WEAKENS AS IT SLIDES FARTHER SOUTH...1-2 TENTHS ARE ABOUT ALL THAT IS LEFT FOR KBFL-KTSP...AND A COUPLE OF HUNDREDTHS FOR THE DESERT. NO CHANGES TO THE FLOOD WATCH CENTRAL SJV-SIERRA ATTM. IN COORD WITH KSTO...WILL WATCH PROGRESS THRU THE SAC VLY BEFORE DETERMINING WHETHER AN ADVISORY OR WARNING IS WARRANTED. SNOW LEVELS CURRENTLY BETWEEN 9-10K WILL REMAIN NEAR THERE THRU THE BULK OF THE PRECIP TODAY. COOLER AIR WILL WORK IN BEHIND THE FRONT WITH SNOW LEVEL LOWERING TO NEAR 6-7K FT. BUT BY THEN MUCH OF THE PRECIP WILL BE OVER. AFTER FROPA...PRECIP WILL SHARPLY DIMINISH IN THE NORTH FROM KMCE AND KFAT THIS EVE...WITH THE LAST PRECIP OUT OF KERN CNTY BEFORE DAYBREAK MON. A SOMEWHAT MOIST WESTERLY UPPER FLOW WILL CONT MON INTO MID-WEEK. THIS WILL BRING OCCASIONAL CLOUDINESS TO CENTRAL CA THRU AT LEAST WED. A SHORTWAVE TROF IN THE FLOW WILL SPREAD REACH THE PAC NW TUES. THE TROF WILL HAVE MINIMAL IMPACT ON CENTRAL CA. A FEW SHOWERS COULD REACH AS FAR SOUTH AS KFAT LATER TUES-WED. OTHERWISE PTCLDY AND DRY. BY THE END OF THE WEEK...HIGH PRESS WILL BUILD IN THE EAST PAC PUTTING CA IN A DRY...SOMEWHAT COOLER...NW FLOW ALOFT. FOG DEVELOPMENT IN THE SJV SHOULD REMAIN NIL...OR VERY LIMITED WITH CLDS AND CONTINUED MIXING THRU AT LEAST WED. BUT AS HEIGHTS BUILD 2ND PART OF THE WEEK...A MORE STABLE AIRMASS AND CLEARING SKIES COULD CAUSE A SIGNIFICANT UPTICK IN FOGGY NITE AND MRNG HRS. && .AVIATION... OVER THE SAN JOAQUIN VALLEY AND ADJACENT FOOTHILLS...AREAS OF MVFR AND LOCAL IFR CEILINGS AND VISIBILITIES IN RAIN THRU 12Z MON. OVER THE SOUTHERN SIERRA NEVADA...RAIN AND HIGHER ELEVATION SNOW CONTINUING WITH AREAS OF IFR CONDITIONS IN MOUNTAIN OBSCURATIONS THRU 12Z MON. OVER THE KERN COUNTY MOUNTAINS...AREAS OF MVFR AND LOCAL IFR IN SHOWERS AND UPSLOPE CLOUDS THRU 12Z MON. OVER THE KERN COUNTY DESERTS...VFR THRU 12Z MON. && .AIR QUALITY ISSUES... NONE. && .CERTAINTY... THE LEVEL OF CERTAINTY FOR DAYS 1 AND 2 IS HIGH. THE LEVEL OF CERTAINTY FOR DAYS 3 THROUGH 7 IS HIGH. THIS INFORMATION IS PROVIDED AS PART OF A TRIAL PROJECT CONDUCTED BY THE NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD. CERTAINTY LEVELS INCLUDE LOW...MEDIUM...AND HIGH. PLEASE VISIT WWW.WEATHER.GOV/HNX/CERTAINTY.PHP /ALL LOWER CASE/ FOR ADDITIONAL INFORMATION AND/OR TO PROVIDE FEEDBACK. && .HNX WATCHES/WARNINGS/ADVISORIES... FLOOD WATCH THROUGH THIS EVENING CAZ089-090-093-096. WIND ADVISORY UNTIL 10 PM PST THIS EVENING CAZ089>091-098. && PUBLIC...DUDLEY AVN/FW...BEAN SYNOPSIS...BSO WEATHER.GOV/HANFORD
Hazardous weather outlook, Dec 2, 5:50 AM PST, 3 hours 2 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 550 AM PST SUN DEC 2 2012 CAZ089>091-093-096-031400- WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY- SOUTHWESTERN SAN JOAQUIN VALLEY- MARIPOSA MADERA AND FRESNO COUNTY FOOTHILLS- SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON- 550 AM PST SUN DEC 2 2012 ...HEAVY RAIN AT TIMES... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL AND SOUTHWESTERN SAN JOAQUIN VALLEY...THE ADJACENT FOOTHILLS...AND HIGHER ELEVATIONS OF THE SOUTHERN SIERRA NEVADA NORTH OF KINGS CANYON. .DAY ONE...TODAY AND TONIGHT BECOMING BREEZY TO WINDY TODAY WITH RAIN DEVELOPING. RAIN MAY BE HEAVY AT TIMES ESPECIALLY FROM FRESNO NORTH. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HAZARDOUS WEATHER IS NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE NECESSARY TODAY FOR POTENTIAL URBAN AND LOWLAND FLOODING IN THE CENTRAL SAN JOAQUIN VALLEY...AND RIVERS AND STREAMS IN THE SIERRA NEVADA NORTH OF KINGS CANYON. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ092-094-095-097-099-031400- SOUTHEASTERN SAN JOAQUIN VALLEY-TULARE COUNTY FOOTHILLS- KERN COUNTY MOUNTAINS-TULARE COUNTY MOUNTAINS- SOUTHEASTERN KERN COUNTY DESERT- 550 AM PST SUN DEC 2 2012 ...PERIODS OF MAINLY LIGHT RAIN... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHEASTERN SAN JOAQUIN VALLEY...THE TULARE COUNTY MOUNTAINS AND ADJACENT FOOTHILLS...AND THE KERN COUNTY MOUNTAINS AND DESERTS. .DAY ONE...TODAY AND TONIGHT RAIN SPREADING SOUTH...LOCALLY HEAVY AT TIMES NORTH OF KERN COUNTY. OTHERWISE HAZARDOUS WEATHER IS NOT EXPECTED. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HAZARDOUS WEATHER IS NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT EXPECTED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ098-031400- INDIAN WELLS VALLEY- 550 AM PST SUN DEC 2 2012 ...WIND ADVISORY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE INDIAN WELLS VALLEY. .DAY ONE...TODAY AND TONIGHT A WIND ADVISORY IS IN EFFECT THROUGH THIS EVENING. SEE SFONPWHNX. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HAZARDOUS WEATHER IS NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. MCB
Nearby
River Flood Warnings in California, 2012Every river flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.