Alert archive / California / Flash Flood Watches in 2017
Flash Flood Watch 2, NWS San Diego, CA
NWS San Diego, CA issued this flash flood watch at Jan 21, 2017, 1:44 PM PST for 4 counties in California. It took effect at Jan 22, 2017, 10:00 AM PST. It was in force for 34 hr.
The area
The counties it named.
The facts
- Issued
- Jan 21, 2017, 1:44 PM PST (21:44 UTC)
- In effect from
- Jan 22, 2017, 10:00 AM PST
- Expired
- Jan 23, 2017, 8:27 PM PST
- In force
- 34 hr
- Issued by
- NWS San Diego, CA
- Flood severity
- None
Counties Orange County, CA, Riverside County, CA, San Bernardino County, CA, San Diego County, CA
The radar
The Santa Ana Mts radar (KSOX), 88 km from the middle of the area, began a volume at 21:47 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 nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.7 hours before the alert went out and 124 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
- 68 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 860 m above ground
- 0-6 km bulk shear
- 110 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
418 WGUS66 KSGX 212144 FFASGX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE SAN DIEGO CA 144 PM PST SAT JAN 21 2017 ...FLASH FLOODING POSSIBLE SUNDAY AFTERNOON THROUGH MONDAY EVENING... .ANOTHER STORM STORM SYSTEM WILL MOVE THROUGH SOUTHERN CALIFORNIA AND BRING HEAVY RAINFALL. THIS WILL BRING A THREAT OF FLASH FLOODING TO ALL AREAS FROM THE COAST THROUGH THE VALLEYS, MOUNTAINS AND DESERTS. THE SNOW LEVEL COULD GET QUITE HIGH ON SUNDAY, ABOVE 7000 FEET, SO FLASH FLOODING COULD OCCUR WHERE SNOW WAS PREVIOUSLY ON THE GROUND IN THE MOUNTAINS. THUNDERSTORMS ON MONDAY COULD BRING HEAVY RAINFALL DURING SHORT PERIODS OF TIME. DEBRIS FLOWS IN RECENT BURN SCARS WILL ALSO BE POSSIBLE. CAZ048-055>057-060-065-552-554-220600- /O.NEW.KSGX.FF.A.0002.170122T2000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS-APPLE AND LUCERNE VALLEYS- SAN GORGONIO PASS NEAR BANNING-ORANGE COUNTY COASTAL AREAS- ORANGE COUNTY INLAND AREAS- INCLUDING THE CITIES OF...RIVERSIDE...SAN BERNARDINO...ONTARIO... MORENO VALLEY...FONTANA...RANCHO CUCAMONGA...CORONA...CRESTLINE... LAKE ARROWHEAD...BIG BEAR CITY...BIG BEAR LAKE... RUNNING SPRINGS...WRIGHTWOOD...IDYLLWILD-PINE COVE... VICTORVILLE...HESPERIA...APPLE VALLEY...LUCERNE VALLEY... BANNING...DESERT HOT SPRINGS...HUNTINGTON BEACH...COSTA MESA... NEWPORT BEACH...LAGUNA BEACH...SAN CLEMENTE...SANTA ANA... ANAHEIM...GARDEN GROVE...IRVINE...ORANGE...FULLERTON... MISSION VIEJO 144 PM PST SAT JAN 21 2017 ...FLASH FLOOD WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY EVENING... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF SOUTHERN CALIFORNIA... SOUTHWEST CALIFORNIA AND SOUTHWESTS CALIFORNIA...INCLUDING THE FOLLOWING AREAS...IN SOUTHERN CALIFORNIA...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE. IN SOUTHWEST CALIFORNIA...APPLE AND LUCERNE VALLEYS...ORANGE COUNTY COASTAL AREAS...ORANGE COUNTY INLAND AREAS...SAN BERNARDINO COUNTY MOUNTAINS...SAN GORGONIO PASS NEAR BANNING AND SANTA ANA MOUNTAINS AND FOOTHILLS. IN SOUTHWESTS CALIFORNIA...RIVERSIDE COUNTY MOUNTAINS. * FROM NOON SUNDAY THROUGH MONDAY EVENING * HEAVY RAIN WILL OCCUR AT TIMES FROM MIDDAY SUNDAY THROUGH MONDAY EVENING. RAINFALL RATES COULD LOCALLY REACH OR EXCEED ONE INCH PER HOUR. THIS WILL BRING A RISK OF FLASH FLOODING. HEAVY RAINS OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUDSLIDES. IN THE MOUNTAINS, A WARMER MOIST AIR MASS ON SUNDAY WILL BRING HEAVY RAIN ON TOP OF PREVIOUSLY FALLEN SNOW AND RESULT IN MELTING OF SNOW WHICH WILL INCREASING THE RISK OF FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ CAZ043-050-058-061-062-220600- /O.NEW.KSGX.FF.A.0002.170123T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO COUNTY COASTAL AREAS-SAN DIEGO COUNTY VALLEYS- SAN DIEGO COUNTY MOUNTAINS-COACHELLA VALLEY- SAN DIEGO COUNTY DESERTS- INCLUDING THE CITIES OF...OCEANSIDE...VISTA...CARLSBAD... ENCINITAS...CHULA VISTA...NATIONAL CITY...SAN DIEGO...ESCONDIDO... EL CAJON...SAN MARCOS...LA MESA...SANTEE...POWAY...JULIAN... PINE VALLEY...INDIO...PALM SPRINGS...CATHEDRAL CITY... PALM DESERT...PALM DESERT COUNTRY...LA QUINTA...COACHELLA... BORREGO SPRINGS 144 PM PST SAT JAN 21 2017 ...FLASH FLOOD WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY EVENING... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WATCH FOR A PORTION OF SOUTHWEST CALIFORNIA... INCLUDING THE FOLLOWING AREAS...COACHELLA VALLEY...SAN DIEGO COUNTY COASTAL AREAS...SAN DIEGO COUNTY DESERTS...SAN DIEGO COUNTY MOUNTAINS AND SAN DIEGO COUNTY VALLEYS. * FROM 400 PM SUNDAY THROUGH MONDAY EVENING * HEAVY RAIN WILL OCCUR AT TIMES FROM MIDDAY SUNDAY THROUGH MONDAY EVENING. RAINFALL RATES COULD LOCALLY REACH OR EXCEED ONE INCH PER HOUR. THIS WILL BRING A RISK OF FLASH FLOODING. HEAVY RAINS OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUDSLIDES. IN THE MOUNTAINS, A WARMER MOIST AIR MASS ON SUNDAY WILL BRING HEAVY RAIN ON TOP OF PREVIOUSLY FALLEN SNOW AND RESULT IN MELTING OF SNOW WHICH WILL INCREASING THE RISK OF FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ MAXWELL
6 follow-up statements
227 WGUS66 KSGX 220508 FFASGX FLOOD WATCH NATIONAL WEATHER SERVICE SAN DIEGO CA 908 PM PST SAT JAN 21 2017 ...FLASH FLOODING POSSIBLE SUNDAY AFTERNOON THROUGH MONDAY EVENING... .ANOTHER STORM STORM SYSTEM WILL MOVE THROUGH SOUTHERN CALIFORNIA AND BRING HEAVY RAINFALL. THIS WILL BRING A THREAT OF FLASH FLOODING TO ALL AREAS FROM THE COAST THROUGH THE VALLEYS...MOUNTAINS AND DESERTS. CAZ048-055>057-060-065-552-554-221400- /O.CON.KSGX.FF.A.0002.170122T2000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS-APPLE AND LUCERNE VALLEYS- SAN GORGONIO PASS NEAR BANNING-ORANGE COUNTY COASTAL AREAS- ORANGE COUNTY INLAND AREAS- INCLUDING THE CITIES OF...RIVERSIDE...SAN BERNARDINO...ONTARIO... MORENO VALLEY...FONTANA...RANCHO CUCAMONGA...CORONA...CRESTLINE... LAKE ARROWHEAD...BIG BEAR CITY...BIG BEAR LAKE... RUNNING SPRINGS...WRIGHTWOOD...IDYLLWILD-PINE COVE... VICTORVILLE...HESPERIA...APPLE VALLEY...LUCERNE VALLEY... BANNING...DESERT HOT SPRINGS...HUNTINGTON BEACH...COSTA MESA... NEWPORT BEACH...LAGUNA BEACH...SAN CLEMENTE...SANTA ANA... ANAHEIM...GARDEN GROVE...IRVINE...ORANGE...FULLERTON... MISSION VIEJO 908 PM PST SAT JAN 21 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF SOUTHERN CALIFORNIA...SOUTHWEST CALIFORNIA AND SOUTHWESTS CALIFORNIA...INCLUDING THE FOLLOWING AREAS...IN SOUTHERN CALIFORNIA...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE. IN SOUTHWEST CALIFORNIA...APPLE AND LUCERNE VALLEYS...ORANGE COUNTY COASTAL AREAS...ORANGE COUNTY INLAND AREAS...SAN BERNARDINO COUNTY MOUNTAINS...SAN GORGONIO PASS NEAR BANNING AND SANTA ANA MOUNTAINS AND FOOTHILLS. IN SOUTHWESTS CALIFORNIA...RIVERSIDE COUNTY MOUNTAINS. * FROM SUNDAY AFTERNOON THROUGH MONDAY EVENING * HEAVY RAIN WILL OCCUR AT TIMES FROM MIDDAY SUNDAY THROUGH MONDAY EVENING. RAINFALL RATES COULD LOCALLY REACH OR EXCEED ONE INCH PER HOUR. THIS WILL BRING A RISK OF FLASH FLOODING. HEAVY RAINS OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUD SLIDES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ CAZ043-050-058-061-062-221400- /O.CON.KSGX.FF.A.0002.170123T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO COUNTY COASTAL AREAS-SAN DIEGO COUNTY VALLEYS- SAN DIEGO COUNTY MOUNTAINS-COACHELLA VALLEY- SAN DIEGO COUNTY DESERTS- INCLUDING THE CITIES OF...OCEANSIDE...VISTA...CARLSBAD... ENCINITAS...CHULA VISTA...NATIONAL CITY...SAN DIEGO...ESCONDIDO... EL CAJON...SAN MARCOS...LA MESA...SANTEE...POWAY...JULIAN... PINE VALLEY...INDIO...PALM SPRINGS...CATHEDRAL CITY... PALM DESERT...PALM DESERT COUNTRY...LA QUINTA...COACHELLA... BORREGO SPRINGS 908 PM PST SAT JAN 21 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHWEST CALIFORNIA...INCLUDING THE FOLLOWING AREAS...COACHELLA VALLEY...SAN DIEGO COUNTY COASTAL AREAS... SAN DIEGO COUNTY DESERTS...SAN DIEGO COUNTY MOUNTAINS AND SAN DIEGO COUNTY VALLEYS. * FROM SUNDAY AFTERNOON THROUGH MONDAY EVENING * HEAVY RAIN WILL OCCUR AT TIMES FROM MIDDAY SUNDAY THROUGH MONDAY EVENING. RAINFALL RATES COULD LOCALLY REACH OR EXCEED ONE INCH PER HOUR. THIS WILL BRING A RISK OF FLASH FLOODING. HEAVY RAINS OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUDSLIDES. IN THE MOUNTAINS...A WARMER MOIST AIR MASS ON SUNDAY WILL RESULT IN MELTING OF SNOW WHICH WILL INCREASING THE RISK OF FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ JAD
287 WGUS66 KSGX 221301 FFASGX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE SAN DIEGO CA 501 AM PST SUN JAN 22 2017 ...FLASH FLOOD WATCH FOR THIS AFTERNOON THROUGH MONDAY EVENING... .THE THIRD AND MOST POWERFUL OF THE STORMS TO IMPACT SOUTHERN CALIFORNIA IN THIS SEQUENCE OF STORMS IS CENTERED OFF THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. IT WILL BRING PERIODS OF HEAVY RAINFALL FOR THIS AFTERNOON THROUGH EARLY EVENING WITH PERIODS OF SHOWERS CONTINUING THROUGH TUESDAY. THIS WILL BRING THE POSSIBILITY OF FLASH FLOODING...MAINLY TO COASTAL AND VALLEY AREAS...THE LOWER ELEVATIONS OF THE MOUNTAINS...AND THE UPPER DESERTS. CAZ048-055>057-060-065-552-554-222245- /O.EXT.KSGX.FF.A.0002.170122T1800Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS-APPLE AND LUCERNE VALLEYS- SAN GORGONIO PASS NEAR BANNING-ORANGE COUNTY COASTAL AREAS- ORANGE COUNTY INLAND AREAS- INCLUDING THE CITIES OF...RIVERSIDE...SAN BERNARDINO...ONTARIO... MORENO VALLEY...FONTANA...RANCHO CUCAMONGA...CORONA...CRESTLINE... LAKE ARROWHEAD...BIG BEAR CITY...BIG BEAR LAKE... RUNNING SPRINGS...WRIGHTWOOD...IDYLLWILD-PINE COVE... VICTORVILLE...HESPERIA...APPLE VALLEY...LUCERNE VALLEY... BANNING...DESERT HOT SPRINGS...HUNTINGTON BEACH...COSTA MESA... NEWPORT BEACH...LAGUNA BEACH...SAN CLEMENTE...SANTA ANA... ANAHEIM...GARDEN GROVE...IRVINE...ORANGE...FULLERTON... MISSION VIEJO 501 AM PST SUN JAN 22 2017 ...FLASH FLOOD WATCH NOW IN EFFECT FROM 10 AM PST THIS MORNING THROUGH MONDAY EVENING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF SOUTHERN CALIFORNIA INCLUDING THE FOLLOWING AREAS...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE...APPLE AND LUCERNE VALLEYS...ORANGE COUNTY COASTAL AREAS...ORANGE COUNTY INLAND AREAS...SAN BERNARDINO COUNTY MOUNTAINS...SAN GORGONIO PASS NEAR BANNING AND SANTA ANA MOUNTAINS AND FOOTHILLS...RIVERSIDE COUNTY MOUNTAINS. * FROM 10 AM PST THIS MORNING THROUGH MONDAY EVENING * HEAVY RAIN WILL OCCUR AT TIMES FROM NOON THROUGH EARLY EVENING TODAY...MAINLY BELOW 6500 FEET. PERIODS OF SHOWERS...SOME WITH HEAVY RAINFALL WILL FOLLOW FOR TONIGHT THROUGH MONDAY...MAINLY BELOW 4000 TO 4500 FEET. RAINFALL RATES COULD LOCALLY REACH OR EXCEED ONE INCH PER HOUR. THIS WILL BRING A RISK OF FLASH FLOODING. HEAVY RAINS OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUD SLIDES. IN THE MOUNTAINS...A WARMER AIR MASS THIS AFTERNOON WILL RESULT IN RISING SNOW LEVELS AND MELTING OF SNOW BELOW 6500 FEET WHICH WILL INCREASE THE RISK OF FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ CAZ043-050-058-061-062-222245- /O.CON.KSGX.FF.A.0002.170123T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO COUNTY COASTAL AREAS-SAN DIEGO COUNTY VALLEYS- SAN DIEGO COUNTY MOUNTAINS-COACHELLA VALLEY- SAN DIEGO COUNTY DESERTS- INCLUDING THE CITIES OF...OCEANSIDE...VISTA...CARLSBAD... ENCINITAS...CHULA VISTA...NATIONAL CITY...SAN DIEGO...ESCONDIDO... EL CAJON...SAN MARCOS...LA MESA...SANTEE...POWAY...JULIAN... PINE VALLEY...INDIO...PALM SPRINGS...CATHEDRAL CITY... PALM DESERT...PALM DESERT COUNTRY...LA QUINTA...COACHELLA... BORREGO SPRINGS 501 AM PST SUN JAN 22 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS AFTERNOON THROUGH MONDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHWEST CALIFORNIA INCLUDING THE FOLLOWING AREAS...COACHELLA VALLEY...SAN DIEGO COUNTY COASTAL AREAS...SAN DIEGO COUNTY DESERTS...SAN DIEGO COUNTY MOUNTAINS AND SAN DIEGO COUNTY VALLEYS. * FROM THIS AFTERNOON THROUGH MONDAY EVENING * HEAVY RAIN WILL OCCUR AT TIMES FROM MID AFTERNOON THROUGH EARLY EVENING TODAY. PERIODS OF SHOWERS...SOME WITH HEAVY RAINFALL WILL FOLLOW FOR TONIGHT THROUGH MONDAY...MAINLY BELOW 4000 TO 4500 FEET. RAINFALL RATES COULD LOCALLY REACH OR EXCEED ONE INCH PER HOUR. THIS WILL BRING A RISK OF FLASH FLOODING. HEAVY RAINS OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUD SLIDES. IN THE MOUNTAINS...A WARMER AIR MASS THIS AFTERNOON AND EARLY EVENING WILL RESULT IN RISING SNOW LEVELS AND MELTING OF SNOW WHICH WILL INCREASE THE RISK OF FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ 17
273 WGUS66 KSGX 222154 FFASGX FLOOD WATCH NATIONAL WEATHER SERVICE SAN DIEGO CA 154 PM PST SUN JAN 22 2017 ...FLASH FLOOD WATCH FOR THIS AFTERNOON THROUGH MONDAY EVENING... .THE THIRD AND MOST POWERFUL OF THE STORMS TO IMPACT SOUTHERN CALIFORNIA IN THIS SEQUENCE OF STORMS WAS MOVING INTO THE REGION THIS AFTERNOON. IT WILL BRING PERIODS OF HEAVY RAINFALL THIS AFTERNOON THROUGH EARLY EVENING WITH PERIODS OF SHOWERS CONTINUING THROUGH TUESDAY. A FEW THUNDERSTORMS WILL BE POSSIBLE MAINLY MONDAY AND MONDAY NIGHT. THIS WILL BRING THE POSSIBILITY OF FLASH FLOODING...MAINLY TO COASTAL AND VALLEY AREAS...THE LOWER AND MIDDLE ELEVATIONS OF THE MOUNTAINS...AND THE UPPER DESERTS. CAZ048-055>057-060-065-552-554-230600- /O.CON.KSGX.FF.A.0002.000000T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS-APPLE AND LUCERNE VALLEYS- SAN GORGONIO PASS NEAR BANNING-ORANGE COUNTY COASTAL AREAS- ORANGE COUNTY INLAND AREAS- INCLUDING THE CITIES OF...RIVERSIDE...SAN BERNARDINO...ONTARIO... MORENO VALLEY...FONTANA...RANCHO CUCAMONGA...CORONA...CRESTLINE... LAKE ARROWHEAD...BIG BEAR CITY...BIG BEAR LAKE... RUNNING SPRINGS...WRIGHTWOOD...IDYLLWILD-PINE COVE... VICTORVILLE...HESPERIA...APPLE VALLEY...LUCERNE VALLEY... BANNING...DESERT HOT SPRINGS...HUNTINGTON BEACH...COSTA MESA... NEWPORT BEACH...LAGUNA BEACH...SAN CLEMENTE...SANTA ANA... ANAHEIM...GARDEN GROVE...IRVINE...ORANGE...FULLERTON... MISSION VIEJO 154 PM PST SUN JAN 22 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHWEST CALIFORNIA...INCLUDING THE FOLLOWING AREAS...APPLE AND LUCERNE VALLEYS...ORANGE COUNTY COASTAL AREAS...ORANGE COUNTY INLAND AREAS...RIVERSIDE COUNTY MOUNTAINS...SAN BERNARDINO COUNTY MOUNTAINS...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE...SAN GORGONIO PASS NEAR BANNING AND SANTA ANA MOUNTAINS AND FOOTHILLS. * THROUGH MONDAY EVENING * HEAVY RAIN WILL OCCUR AT TIMES THROUGH EARLY EVENING...MAINLY BELOW 6500 FEET. PERIODS OF SHOWERS...SOME WITH HEAVY RAINFALL WILL FOLLOW FOR TONIGHT THROUGH MONDAY...MAINLY BELOW 4500 FEET. RAINFALL RATES COULD LOCALLY REACH OR EXCEED ONE INCH PER HOUR. THIS WILL BRING A RISK OF FLASH FLOODING. HEAVY RAINS OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUD SLIDES. IN THE MOUNTAINS...A WARMER AIR MASS THIS AFTERNOON WILL RESULT IN RISING SNOW LEVELS AND MELTING OF SNOW BELOW 6500 FEET WHICH WILL INCREASE THE RISK OF FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ CAZ043-050-058-061-062-230600- /O.CON.KSGX.FF.A.0002.170123T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO COUNTY COASTAL AREAS-SAN DIEGO COUNTY VALLEYS- SAN DIEGO COUNTY MOUNTAINS-COACHELLA VALLEY- SAN DIEGO COUNTY DESERTS- INCLUDING THE CITIES OF...OCEANSIDE...VISTA...CARLSBAD... ENCINITAS...CHULA VISTA...NATIONAL CITY...SAN DIEGO...ESCONDIDO... EL CAJON...SAN MARCOS...LA MESA...SANTEE...POWAY...JULIAN... PINE VALLEY...INDIO...PALM SPRINGS...CATHEDRAL CITY... PALM DESERT...PALM DESERT COUNTRY...LA QUINTA...COACHELLA... BORREGO SPRINGS 154 PM PST SUN JAN 22 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHWEST CALIFORNIA...INCLUDING THE FOLLOWING AREAS...COACHELLA VALLEY...SAN DIEGO COUNTY COASTAL AREAS... SAN DIEGO COUNTY DESERTS...SAN DIEGO COUNTY MOUNTAINS AND SAN DIEGO COUNTY VALLEYS. * THROUGH MONDAY EVENING * HEAVY RAIN WILL OCCUR AT TIMES THROUGH EARLY EVENING TODAY. PERIODS OF SHOWERS...SOME WITH HEAVY RAINFALL WILL FOLLOW TONIGHT THROUGH MONDAY...MAINLY BELOW 5000 FEET. RAINFALL RATES COULD LOCALLY REACH OR EXCEED ONE INCH PER HOUR. THIS WILL BRING A RISK OF FLASH FLOODING. HEAVY RAINS OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUD SLIDES. IN THE MOUNTAINS...A WARMER AIR MASS THIS AFTERNOON AND EARLY EVENING WILL RESULT IN RISING SNOW LEVELS AND MELTING OF SNOW WHICH WILL INCREASE THE RISK OF FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ MAXWELL
943 WGUS66 KSGX 231237 FFASGX FLOOD WATCH NATIONAL WEATHER SERVICE SAN DIEGO CA 437 AM PST MON JAN 23 2017 ...FLASH FLOOD WATCH THROUGH THIS EVENING... .A LARGE LOW PRESSURE SYSTEM NEAR THE WEST COAST WILL MOVE SLOWLY INLAND THROUGH TUESDAY. MUCH COLDER AIR ALOFT WILL SPREAD SOUTHWARD ACROSS SOUTHERN CALIFORNIA TODAY. THIS IS EXPECTED TO INCREASE SHOWER COVERAGE AND INTENSITY TODAY...ESPECIALLY FOR LATE MORNING INTO THE AFTERNOON...AND BRING A SLIGHT CHANCE OF THUNDERSTORMS WITH SMALL HAIL. THIS WILL BRING THE POSSIBILITY OF FLASH FLOODING...MAINLY TO COASTAL AND VALLEY AREAS AND THE LOWER ELEVATIONS OF THE MOUNTAINS. CAZ048-055>057-060-065-552-554-232230- /O.CON.KSGX.FF.A.0002.000000T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS-APPLE AND LUCERNE VALLEYS- SAN GORGONIO PASS NEAR BANNING-ORANGE COUNTY COASTAL AREAS- ORANGE COUNTY INLAND AREAS- INCLUDING THE CITIES OF...RIVERSIDE...SAN BERNARDINO...ONTARIO... MORENO VALLEY...FONTANA...RANCHO CUCAMONGA...CORONA...CRESTLINE... LAKE ARROWHEAD...BIG BEAR CITY...BIG BEAR LAKE... RUNNING SPRINGS...WRIGHTWOOD...IDYLLWILD-PINE COVE... VICTORVILLE...HESPERIA...APPLE VALLEY...LUCERNE VALLEY... BANNING...DESERT HOT SPRINGS...HUNTINGTON BEACH...COSTA MESA... NEWPORT BEACH...LAGUNA BEACH...SAN CLEMENTE...SANTA ANA... ANAHEIM...GARDEN GROVE...IRVINE...ORANGE...FULLERTON... MISSION VIEJO 437 AM PST MON JAN 23 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHWEST CALIFORNIA...INCLUDING THE FOLLOWING AREAS...APPLE AND LUCERNE VALLEYS...ORANGE COUNTY COASTAL AREAS...ORANGE COUNTY INLAND AREAS...RIVERSIDE COUNTY MOUNTAINS...SAN BERNARDINO COUNTY MOUNTAINS...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE...SAN GORGONIO PASS NEAR BANNING AND SANTA ANA MOUNTAINS AND FOOTHILLS. * THROUGH THIS EVENING * SOILS ARE NEARLY SATURATED FROM RECENT HEAVY RAINFALL. PERIODS OF SHOWERS WILL CONTINUE THROUGH THIS EVENING WITH BRIEF HEAVY RAINFALL. BANDS OF SHOWERS...STRONGER SHOWERS WITH HEAVIER RAINFALL...AND ISOLATED THUNDERSTORMS HAVE GREATER POTENTIAL TO CAUSE URBAN AND SMALL STREAM FLOODING AND ISOLATED FLASH FLOODING. HEAVY RAINFALL OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUD SLIDES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ CAZ043-050-058-061-062-232230- /O.CON.KSGX.FF.A.0002.000000T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO COUNTY COASTAL AREAS-SAN DIEGO COUNTY VALLEYS- SAN DIEGO COUNTY MOUNTAINS-COACHELLA VALLEY- SAN DIEGO COUNTY DESERTS- INCLUDING THE CITIES OF...OCEANSIDE...VISTA...CARLSBAD... ENCINITAS...CHULA VISTA...NATIONAL CITY...SAN DIEGO...ESCONDIDO... EL CAJON...SAN MARCOS...LA MESA...SANTEE...POWAY...JULIAN... PINE VALLEY...INDIO...PALM SPRINGS...CATHEDRAL CITY... PALM DESERT...PALM DESERT COUNTRY...LA QUINTA...COACHELLA... BORREGO SPRINGS 437 AM PST MON JAN 23 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHWEST CALIFORNIA...INCLUDING THE FOLLOWING AREAS...COACHELLA VALLEY...SAN DIEGO COUNTY COASTAL AREAS... SAN DIEGO COUNTY DESERTS...SAN DIEGO COUNTY MOUNTAINS AND SAN DIEGO COUNTY VALLEYS. * THROUGH THIS EVENING * SOILS ARE NEARLY SATURATED FROM RECENT HEAVY RAINFALL. PERIODS OF SHOWERS WILL CONTINUE THROUGH THIS EVENING WITH BRIEF HEAVY RAINFALL. BANDS OF SHOWERS...STRONGER SHOWERS WITH HEAVIER RAINFALL...AND ISOLATED THUNDERSTORMS HAVE GREATER POTENTIAL TO CAUSE URBAN AND SMALL STREAM FLOODING AND ISOLATED FLASH FLOODING. HEAVY RAINFALL OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUD SLIDES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ 17
228 WGUS66 KSGX 232158 FFASGX FLOOD WATCH NATIONAL WEATHER SERVICE SAN DIEGO CA 158 PM PST MON JAN 23 2017 ...FLASH FLOOD WATCH THROUGH THIS EVENING... .A LARGE LOW PRESSURE SYSTEM NEAR THE WEST COAST WILL MOVE SLOWLY INLAND THROUGH TUESDAY. MUCH COLDER AIR ALOFT WILL CONTINUE TO SPREAD SOUTHWARD ACROSS SOUTHERN CALIFORNIA. THIS WILL CONTINUE TO BRING SCATTERED SHOWERS TO THE AREA ALONG WITH ISOLATED THUNDERSTORMS WITH SMALL HAIL. ANY HEAVIER SHOWERS COULD PRODUCE FLASH FLOODING...MAINLY TO COASTAL AND VALLEY AREAS AND THE LOWER ELEVATIONS OF THE MOUNTAINS. CAZ048-055>057-060-065-552-554-240600- /O.CON.KSGX.FF.A.0002.000000T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS-APPLE AND LUCERNE VALLEYS- SAN GORGONIO PASS NEAR BANNING-ORANGE COUNTY COASTAL AREAS- ORANGE COUNTY INLAND AREAS- INCLUDING THE CITIES OF...RIVERSIDE...SAN BERNARDINO...ONTARIO... MORENO VALLEY...FONTANA...RANCHO CUCAMONGA...CORONA...CRESTLINE... LAKE ARROWHEAD...BIG BEAR CITY...BIG BEAR LAKE... RUNNING SPRINGS...WRIGHTWOOD...IDYLLWILD-PINE COVE... VICTORVILLE...HESPERIA...APPLE VALLEY...LUCERNE VALLEY... BANNING...DESERT HOT SPRINGS...HUNTINGTON BEACH...COSTA MESA... NEWPORT BEACH...LAGUNA BEACH...SAN CLEMENTE...SANTA ANA... ANAHEIM...GARDEN GROVE...IRVINE...ORANGE...FULLERTON... MISSION VIEJO 158 PM PST MON JAN 23 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHWEST CALIFORNIA...INCLUDING THE FOLLOWING AREAS...APPLE AND LUCERNE VALLEYS...ORANGE COUNTY COASTAL AREAS...ORANGE COUNTY INLAND AREAS...RIVERSIDE COUNTY MOUNTAINS...SAN BERNARDINO COUNTY MOUNTAINS...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE...SAN GORGONIO PASS NEAR BANNING AND SANTA ANA MOUNTAINS AND FOOTHILLS. * UNTIL 10 PM PST THIS EVENING * SOILS ARE NEARLY SATURATED FROM RECENT HEAVY RAINFALL. SHOWERS WILL CONTINUE THROUGH THIS EVENING WITH BRIEF HEAVY RAINFALL. BANDS OF SHOWERS...STRONGER SHOWERS WITH HEAVIER RAINFALL...AND ISOLATED THUNDERSTORMS HAVE GREATER POTENTIAL TO CAUSE URBAN AND SMALL STREAM FLOODING AND ISOLATED FLASH FLOODING. HEAVY RAINFALL OVER RECENT BURN SCARS COULD RESULT IN DEBRIS FLOWS AND MUD SLIDES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ CAZ043-050-058-061-062-240600- /O.CON.KSGX.FF.A.0002.000000T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO COUNTY COASTAL AREAS-SAN DIEGO COUNTY VALLEYS- SAN DIEGO COUNTY MOUNTAINS-COACHELLA VALLEY- SAN DIEGO COUNTY DESERTS- INCLUDING THE CITIES OF...OCEANSIDE...VISTA...CARLSBAD... ENCINITAS...CHULA VISTA...NATIONAL CITY...SAN DIEGO...ESCONDIDO... EL CAJON...SAN MARCOS...LA MESA...SANTEE...POWAY...JULIAN... PINE VALLEY...INDIO...PALM SPRINGS...CATHEDRAL CITY... PALM DESERT...PALM DESERT COUNTRY...LA QUINTA...COACHELLA... BORREGO SPRINGS 158 PM PST MON JAN 23 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHWEST CALIFORNIA...INCLUDING THE FOLLOWING AREAS...COACHELLA VALLEY...SAN DIEGO COUNTY COASTAL AREAS... SAN DIEGO COUNTY DESERTS...SAN DIEGO COUNTY MOUNTAINS AND SAN DIEGO COUNTY VALLEYS. * UNTIL 10 PM PST THIS EVENING * SOILS ARE NEARLY SATURATED FROM RECENT HEAVY RAINFALL. ANY SHOWER WOULD HAVE A GREATER POTENTIAL TO CAUSE URBAN AND SMALL STREAM FLOODING AND ISOLATED FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ GREGORIA
683 WGUS66 KSGX 240427 FFASGX FLOOD WATCH NATIONAL WEATHER SERVICE SAN DIEGO CA 827 PM PST MON JAN 23 2017 CAZ043-048-050-055>058-060>062-065-552-554-240530- /O.CAN.KSGX.FF.A.0002.000000T0000Z-170124T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO COUNTY COASTAL AREAS- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS- RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS- SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS- COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- SAN GORGONIO PASS NEAR BANNING-ORANGE COUNTY COASTAL AREAS- ORANGE COUNTY INLAND AREAS- INCLUDING THE CITIES OF...OCEANSIDE...VISTA...CARLSBAD... ENCINITAS...CHULA VISTA...NATIONAL CITY...SAN DIEGO...RIVERSIDE... SAN BERNARDINO...ONTARIO...MORENO VALLEY...FONTANA... RANCHO CUCAMONGA...CORONA...ESCONDIDO...EL CAJON...SAN MARCOS... LA MESA...SANTEE...POWAY...CRESTLINE...LAKE ARROWHEAD... BIG BEAR CITY...BIG BEAR LAKE...RUNNING SPRINGS...WRIGHTWOOD... IDYLLWILD-PINE COVE...JULIAN...PINE VALLEY...VICTORVILLE... HESPERIA...APPLE VALLEY...LUCERNE VALLEY...INDIO...PALM SPRINGS... CATHEDRAL CITY...PALM DESERT...PALM DESERT COUNTRY...LA QUINTA... COACHELLA...BORREGO SPRINGS...BANNING...DESERT HOT SPRINGS... HUNTINGTON BEACH...COSTA MESA...NEWPORT BEACH...LAGUNA BEACH... SAN CLEMENTE...SANTA ANA...ANAHEIM...GARDEN GROVE...IRVINE... ORANGE...FULLERTON...MISSION VIEJO 827 PM PST MON JAN 23 2017 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR A PORTION OF SOUTHWEST CALIFORNIA HAS BEEN CANCELLED. SHOWERS AND THUNDERSTORMS CAPABLE OF PRODUCING FLASH FLOODING ARE NO LONGER EXPECTED FOR THE REMAINDER OF THE NIGHT. $$ SGX
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before this flash flood watch went out at Jan 21, 10:00 AM PST, 3 hours 44 minutes earlier.
Area forecast discussion, Jan 21, 10:00 AM PST, 3 hours 44 minutes before
Area Forecast Discussion
National Weather Service San Diego CA
1000 AM PST Sat Jan 21 2017
.SYNOPSIS...
Some showers will continue today, mainly over San DIego County. The
third storm of the series will be quite strong and will move through
the region Sunday through Monday and bring periods of heavy rainfall
with flooding, heavy snow in the mountains and strong winds. Showers
will continue Tuesday, then dry weather will arrive Wednesday and
continue through next weekend with gusty northeast winds possible at
times below passes and canyons. Warmer weather will return towards
the end of the week.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
Scattered showers, briefly moderate to heavy, were occurring over
San Diego County, especially the mountains, with partly cloudy skies
elsewhere. This will continue this afternoon, with little or no
precipitation overnight as we await the next storm system which will
arrive Sunday with its onset of precipitation from northwest (Orange
County/Western Inland Empire) in the morning to southeast
(Southern/Eastern San Diego County) by mid afternoon. Total
precipitable water amounts could be as high as 1.35 inches along the
coast, so precipitation amounts again will likely be enough to
produce flooding, both flash flooding and river flooding, including
along the San Diego River. A flash flood watch will be issued this
afternoon for late Sunday through Monday for most likely the entire
forecast area, including the deserts as saturation will extend up to
around 500 MB at times, easily enough for significant rainfall to
extend east and north into the deserts. A few thunderstorms Monday
could add to the flood risk.
Winds could be quite strong again Sunday afternoon/evening as NAM
shows winds at 850 MB at times between 45 and 55 knots over parts of
the area. Strongest winds should occur along the frontal passage in
mid-late afternoon. S-SSW flow will bring a mountain wave to the San
Bernardino County Mountains/adjacent high deserts where local gusts
could exceed 80 MPH Sunday afternoon.
The snow level will be variable as strong warm air advection in the
850-700 MB layer due to the southerly flow will occur Sunday. The
snow level could start at 5000 feet with the onset of the precip
early in the morning but could rise to 7000 feet in the afternoon.
This will limit snowfall amounts in the 5000-7000 foot range
somewhat, though colder air will move in behind the front Sunday
night and bring the snow level back down to 5000 feet by Monday
morning and 4000 feet by Monday evening, possibly even lower
Tuesday. One to two feet of additional snowfall is likely above
about 6000-6500 feet.
Precip should gradually taper to showers from north to south Monday
night and Tuesday, then the broad cold upper low will finally shift
east of the region Wednesday with a ridge building in late in the
week from the Pacific. A surface high will build over the interior
west and bring surface offshore flow and locally gusty NE winds
through/below passes and canyons. A gradual warming trend will occur
with temperatures possibly a little above normal by next weekend.
&&
.AVIATION...
211736Z...SCT-BKN cloud decks in the 3000-12000 ft msl layer over
and west of the mountains with isol embedded showers mainly over the
mountains, and primarily P6SM vis (except for mountain obscuration
of coastal slopes) will likely continue through 22/1200 UTC, while
the deserts will have FEW-SCT clouds 5000-12000 ft msl layer and
P6SM vis. After 22/1200 UTC...cloud decks becoming BKN-OVC in the
2000-15000 ft msl layer with increasing showers coming in from the
west, lowering cigs, lowering vis and increasing mountain
obscuration.
W to WNW winds 20-30 kt with gusts 40 kt over mtn ridges/desert
slopes/passes and associated mod-stg uddfs/llws will gradually
diminish after 22/0000 UTC.
&&
.MARINE...
At 8 am, the San Clemente Basin Buoy showed NW winds of 19 kt
gusting to 25 kt with 13 foot seas. Gale conditions are no longer
occurring and are not expected today, and winds should diminish
below 21 kt by late afternoon. However, combined seas above 10 ft
are likely to continue through early Sunday.
A third and final storm arrives Sunday and continues through Monday
night, bringing more strong winds possibly reaching gale-force once
again, heavy rain and very large seas up to 15 feet. Gale Warnings
have been issued for late Sunday morning through late Monday night,
with conditions mainly hazardous to just small craft (due to 10 foot
seas) continuing through mid Sunday morning.
&&
.BEACHES...
A High Surf Warning remains in effect. Very large west swells will
likely produce surf heights of 8-12 feet with sets of 15-16 ft
today. Surf this large could damage structures and produce beach
erosion. Early morning high tides will be around 5 ft, so the
coastal flooding magnitude will likely be minor.
The swells will diminish a little on Sunday but high surf conditions
are still likely to persist into Tuesday. It is not until Wednesday
that surf and swell conditions will lower below high surf
thresholds.
More high surf is on tap for next Friday as a large long-period
swell (9 ft/19 seconds) from 290 degrees moves into the coastal
waters and surf zone.
&&
.HYDROLOGY...
The San Diego River at Fashion Valley was 10.17 feet at 9:15 AM, and
it fell below the flood stage of 11.3 feet at Fashion Valley at 5:15
AM. It peaked at 11.99 feet at 7:15 PM Saturday with a secondary
lower peak at 11.81 feet at 2:15 AM. This was the highest level
since 14.01 feet in December of 2010. That crest in 2010 was the
third highest on record and the crest Friday evening was the ninth
highest on record. The rainfall Sunday night and Monday could bring
additional flooding along the San Diego River and flash flooding in
other parts of our forecast area. The latest CNRFC forecast is 11.8
feet at 6 PM Monday for the San Diego River at Fashion Valley.
&&
.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.
&&
.SGX WATCHES/WARNINGS/ADVISORIES...
CA...High Wind Warning until 10 PM PST this evening for Riverside
County Mountains-San Diego County Deserts-San Diego County
Mountains.
Winter Storm Warning from 4 PM Sunday to 6 PM PST Monday for
Riverside County Mountains-San Diego County Mountains.
Wind Advisory from 6 AM to 6 PM PST Monday for San Diego County
Deserts-San Gorgonio Pass Near Banning.
High Wind Warning from noon Sunday to 6 PM PST Monday for Apple
and Lucerne Valleys.
Wind Advisory until 6 PM PST this evening for Apple and Lucerne
Valleys-San Gorgonio Pass Near Banning.
High Wind Warning from 4 PM Sunday to 6 PM PST Monday for San
Diego County Coastal Areas-San Diego County Valleys.
Winter Storm Warning from noon Sunday to 6 PM PST Monday for San
Bernardino County Mountains.
High Wind Warning from noon Sunday to noon PST Monday for Orange
County Coastal Areas-Orange County Inland Areas-Santa Ana
Mountains and Foothills.
High Wind Warning from 4 PM Sunday to noon PST Monday for San
Bernardino and Riverside County Valleys-The Inland Empire.
High Surf Warning until 10 PM PST Tuesday for Orange County
Coastal Areas-San Diego County Coastal Areas.
PZ...Gale Warning until 4 PM PST this afternoon for Coastal Waters
from San Mateo Point to the Mexican Border and out to 30 nm-
Waters from San Mateo point to the Mexican Border Extending
30 to 60 nm out including San Clemente Island.
Gale Warning from 10 AM Sunday to 4 AM PST Tuesday for Coastal
Waters from San Mateo Point to the Mexican Border and out
to 30 nm-Waters from San Mateo point to the Mexican Border
Extending 30 to 60 nm out including San Clemente Island.
&&
PUBLIC/HYDROLOGY...Maxwell
AVIATION/MARINE/BEACHES...HarrisonIn the hours before
Local storm report, Jan 21, 10:23 AM PST, 3 hours 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1023 AM PST SAT JAN 21 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 PM FLOOD 3 SSW CATHEDRAL CITY 33.80N 116.49W
01/20/2017 RIVERSIDE CA EMERGENCY MNGR
6 ROADS IN THE PALM SPRINGS AREA ARE CLOSED
DUE TO FLOODING: GOLF CLUB DRIVE...GENE
AUTRY...INDIAN CANYON DRIVE...VISTA CHINO
ROAD...FRANK SINATRA BETWEEN DUVALL AND
111...AND ARABY DRIVE. .
0400 PM HEAVY RAIN 2 ESE PALM SPRINGS 33.82N 116.51W
01/20/2017 M0.96 INCH RIVERSIDE CA EMERGENCY MNGR
FORMER PRESIDENT OBAMA'S PLANE WAS DIVERTED
FROM PALM SPRINGS AIRPORT DUE TO LOW
CEILINGS BELOW 1200 FEET IN MODERATE TO
HEAVY RAIN.
&&
NWS SAN DIEGO CA
SHARRISOThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 20, 6:01 PM PST | River Flood Warning | SGX | San Diego | 10 hr |
| Jan 21, 3:04 AM PST | Gale Warning | SGX | 66 hr | |
| Jan 21, 4:36 AM PST | High Wind Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 48 hr |
| Jan 21, 4:36 AM PST | Wind Advisory | SGX | Riverside, San Bernardino, San Diego | 59 hr |
| Jan 21, 5:02 AM PST | Winter Storm Warning | SGX | Riverside, San Bernardino, San Diego | 65 hr |
Nearby
Flash Flood Watches in California, 2017Every flash flood watch in 2017
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.