Alert archive / California / Flash Flood Watches in 2017
Flash Flood Watch 3, NWS San Diego, CA
NWS San Diego, CA issued this flash flood watch at Feb 15, 2017, 2:07 PM PST for 4 counties in California. It took effect at Feb 17, 2017, 12:00 PM PST. It was in force for 25 hr.
The area
The counties it named.
The facts
- Issued
- Feb 15, 2017, 2:07 PM PST (22:07 UTC)
- In effect from
- Feb 17, 2017, 12:00 PM PST
- Expired
- Feb 18, 2017, 1:03 PM PST
- In force
- 25 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 22:07 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, 10.1 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2500 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
144 WGUS66 KSGX 152207 FFASGX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service San Diego CA 207 PM PST Wed Feb 15 2017 ...Major Pacific Storm to Bring Heavy Rainfall and Potential Flash Flooding to Southern California Friday through Saturday... .A major storm system will move in from the Pacific on Friday, bringing heavy rainfall and the potential of flash flooding to Southern California Friday through Saturday with the greatest impact period forecast to be Friday night. CAZ043-048-050-057-058-060>062-065-552-554-161200- /O.NEW.KSGX.FF.A.0003.170217T2000Z-170219T0000Z/ /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-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...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 207 PM PST Wed Feb 15 2017 ...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON... The National Weather Service in San Diego has issued a * Flash Flood Watch for a portion of southwest California... including the following areas...Apple and Lucerne Valleys... Coachella Valley...Orange County Coastal Areas...Orange County Inland Areas...San Bernardino and Riverside County Valleys-The Inland Empire...San Diego County Coastal Areas...San Diego County Deserts...San Diego County Mountains...San Diego County Valleys...San Gorgonio Pass Near Banning and Santa Ana Mountains and Foothills. * From Friday afternoon through Saturday afternoon. * A major Pacific storm will bring moderate to heavy rain to the area. The rain is forecast to begin across Orange and San Bernardino Counties during the day on Friday, then spread east and south through Friday evening. The period of greatest impact is forecast to be Friday evening through the overnight hours with widespread moderate to heavy rain forecast. The heaviest rainfall is forecast to fall across Orange County where 2 to 4 inches of rain is forecast, except around 5 inches in the Santa Ana mountains. Total rainfall of 2 to 4 inches is forecast for the Inland Empire with 1 to 2 inches further south across San Diego County and around an inch across the deserts. Localized higher amounts are possible. Rainfall rates of a half an inch to one inch per hour are possible, which could lead to 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. && $$ CAZ055-056-161200- /O.NEW.KSGX.FF.A.0003.170217T2000Z-170219T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of...Crestline...Lake Arrowhead... Big Bear City...Big Bear Lake...Running Springs...Wrightwood... Idyllwild-Pine Cove 207 PM PST Wed Feb 15 2017 ...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON BELOW 6000 FEET... The National Weather Service in San Diego has issued a * Flash Flood Watch for a portion of southwest California... including the following areas...Riverside County Mountains and San Bernardino County Mountains below 6000 feet. * From Friday afternoon through Saturday afternoon * A major Pacific storm will bring moderate to heavy rain to the area. The rain is forecast to begin Friday during the day and become widespread and heavy by Friday evening. The period of greatest impact is forecast to be Friday evening through the overnight hours when heavy rainfall is forecast. Storm total rainfall amounts for the coastal mountain slopes is forecast to range from 3 to 6 inches. Rainfall rates of a half an inch to one inch per hour are possible, which could lead to flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Gregoria
7 follow-up statements
011 WGUS66 KSGX 161103 FFASGX Flood Watch National Weather Service San Diego CA 303 AM PST Thu Feb 16 2017 ...Major Pacific Storm to Bring Heavy Rainfall and Potential Flash Flooding to Southern California Friday through Saturday... .A major storm system will move in from the Pacific on Friday... bringing heavy rainfall and the potential of flash flooding to Southern California Friday through Saturday with the greatest impact period forecast to be Friday night. CAZ043-048-050-057-058-060>062-065-552-554-162200- /O.CON.KSGX.FF.A.0003.170217T2000Z-170219T0000Z/ /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-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...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 303 AM PST Thu Feb 16 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Apple and Lucerne Valleys...Coachella Valley...Orange County Coastal Areas...Orange County Inland Areas...San Bernardino and Riverside County Valleys-The Inland Empire... San Diego County Coastal Areas...San Diego County Deserts... San Diego County Mountains...San Diego County Valleys...San Gorgonio Pass Near Banning and Santa Ana Mountains and Foothills. * Friday afternoon through Saturday afternoon * A major Pacific storm will bring moderate to heavy rain to the area. The rain is forecast to begin across Orange and San Bernardino Counties during the day on Friday... then spread east and south through Friday night. The period of greatest impact is forecast to be Friday night with widespread moderate to heavy rain forecast. Forecast rainfall totals for Friday and Saturday: ORANGE COUNTY..............2 to 4 inches. SAN DIEGO COUNTY...........1 TO 2 inches. INLAND EMPIRE..............1.5 TO 4 inches. DESERTS....................0.25 to 1 inch. Localized higher amounts are possible. Rainfall rates of a half an inch to one inch per hour are possible... which could lead to 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. Monitor forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAZ055-056-162200- /O.CON.KSGX.FF.A.0003.170217T2000Z-170219T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of...Crestline...Lake Arrowhead... Big Bear City...Big Bear Lake...Running Springs...Wrightwood... Idyllwild-Pine Cove 303 AM PST Thu Feb 16 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * Riverside County Mountains and San Bernardino County Mountains. * Friday afternoon through Saturday afternoon * A major Pacific storm will bring moderate to heavy rain to the area. The rain is forecast to begin Friday during the day and become widespread and heavy by Friday evening. The period of greatest impact is forecast to be Friday night. Storm total rainfall amounts for the coastal mountain slopes is forecast to range from 2 to 7 inches. Rainfall rates of a half an inch to one inch per hour are possible... which could lead to flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MM
126 WGUS66 KSGX 162213 FFASGX Flood Watch National Weather Service San Diego CA 213 PM PST Thu Feb 16 2017 ...Major Pacific Storm to Bring Heavy Rainfall and Potential Flash Flooding to Southern California Friday through Saturday... .A major storm system will move in from the Pacific on Friday... bringing heavy rainfall and the potential of flash flooding to Southern California Friday afternoon through Saturday with the greatest impact period forecast to be between 4 PM and midnight Friday. CAZ043-048-050-057-058-060>062-065-552-554-171200- /O.CON.KSGX.FF.A.0003.170217T2000Z-170219T0000Z/ /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-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...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 213 PM PST Thu Feb 16 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Apple and Lucerne Valleys...Coachella Valley...Orange County Coastal Areas...Orange County Inland Areas...San Bernardino and Riverside County Valleys-The Inland Empire... San Diego County Coastal Areas...San Diego County Deserts... San Diego County Mountains...San Diego County Valleys...San Gorgonio Pass Near Banning and Santa Ana Mountains and Foothills. * From Friday afternoon through Saturday afternoon * A major Pacific storm will bring moderate to heavy rain to the area. The rain is forecast to begin across Orange and San Bernardino Counties during the day on Friday... then spread east and south through Friday night. The period of greatest impact is forecast to be between 4 PM and midnight Friday with widespread moderate to heavy rain forecast. Forecast rainfall totals for Friday and Saturday: ORANGE COUNTY..............2 to 4 inches except up to 5 inches in the Santa Ana mountains. SAN DIEGO COUNTY...........1 TO 2 inches, locally up to 3 inches. INLAND EMPIRE..............1.5 TO 4 inches. DESERTS....................0.25 to 1 inch. Rainfall rates of a half an inch to one inch per hour are possible... which could lead to 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. Monitor forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAZ055-056-171200- /O.CON.KSGX.FF.A.0003.170217T2000Z-170219T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of...Crestline...Lake Arrowhead... Big Bear City...Big Bear Lake...Running Springs...Wrightwood... Idyllwild-Pine Cove 213 PM PST Thu Feb 16 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON BELOW 6000 FEET... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Riverside County Mountains and San Bernardino County Mountains. * From Friday afternoon through Saturday afternoon * A major Pacific storm will bring moderate to heavy rain to the area. The rain is forecast to begin Friday during the day and become widespread and heavy by Friday evening. The period of greatest impact is forecast to be between 4 PM and midnight on Friday. Storm total rainfall amounts for the coastal mountain slopes is forecast to range from 3 to 7 inches. Rainfall rates of a half an inch to one inch per hour are possible... which could lead to flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ GREGORIA
918 WGUS66 KSGX 171221 FFASGX Flood Watch National Weather Service San Diego CA 421 AM PST Fri Feb 17 2017 ...Strong Pacific Storm to Bring Heavy Rainfall and Potential for significant Flash Flooding... .A major storm system will move in from the Pacific today...bringing heavy rainfall and the potential flash flooding to Southern California this afternoon through Saturday. The greatest impact period will be between 2 pm this afternoon and midnight this evening. CAZ043-048-050-057-058-060>062-065-552-554-180030- /O.CON.KSGX.FF.A.0003.170217T2000Z-170219T0000Z/ /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-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...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 421 AM PST Fri Feb 17 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM NOON PST TODAY THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Apple and Lucerne Valleys...Coachella Valley...Orange County Coastal Areas...Orange County Inland Areas...San Bernardino and Riverside County Valleys-The Inland Empire... San Diego County Coastal Areas...San Diego County Deserts... San Diego County Mountains...San Diego County Valleys...San Gorgonio Pass Near Banning and Santa Ana Mountains and Foothills. * From noon PST today through Saturday afternoon * A major Pacific storm will bring heavy rain to the area. The rain is forecast to begin across Orange and San Bernardino Counties this morning...then spread SE through this evening. The period of greatest impact is forecast to be between 2 PM this afternoon and about midnight this evening. Forecast rainfall totals through Saturday: ORANGE COUNTY..............2.5 to 4 inches with up to 5 inches in the Santa Ana mountains. INLAND EMPIRE..............1.5 TO 4 inches. SAN DIEGO COUNTY...........1.5 TO 2.5 inches. DESERTS....................0.5 to 1 inch. Rainfall rates of a half an inch to one inch per hour are possible...which would lead to flash flooding and flooding of urbanized areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Monitor forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAZ055-056-180030- /O.CON.KSGX.FF.A.0003.170217T2000Z-170219T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of...Crestline...Lake Arrowhead... Big Bear City...Big Bear Lake...Running Springs...Wrightwood... Idyllwild-Pine Cove 421 AM PST Fri Feb 17 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM NOON PST TODAY THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Riverside County Mountains and San Bernardino County Mountains. * From noon PST today through Saturday afternoon * A major Pacific storm will bring heavy rain to the area. The rain is forecast to begin this morning and become heavy and widespread by late this afternoon and evening. The period of greatest impact will be between 2 PM and midnight. Storm total rainfall amounts for the coastal mountain slopes is forecast to range from 3 to 8 inches. Rainfall rates of a half an inch to one inch per hour are possible... which would lead to flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JMB
121 WGUS66 KSGX 172248 FFASGX Flood Watch National Weather Service San Diego CA 248 PM PST Fri Feb 17 2017 ...Heavy rain moving through the region this afternoon and evening... ...Floods and flash floods likely... .Heavy rain now moving through the region will bring heavy rainfall through about 8 pm. Heavy cells within this band could briefly intensify the already intense rain. Urban and small stream flooding is expected and flash floods are possible. CAZ043-048-050-057-058-060>062-065-552-554-180600- /O.CON.KSGX.FF.A.0003.000000T0000Z-170219T0000Z/ /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-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...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 248 PM PST Fri Feb 17 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Apple and Lucerne Valleys...Coachella Valley...Orange County Coastal Areas...Orange County Inland Areas...San Bernardino and Riverside County Valleys-The Inland Empire... San Diego County Coastal Areas...San Diego County Deserts... San Diego County Mountains...San Diego County Valleys...San Gorgonio Pass Near Banning and Santa Ana Mountains and Foothills. * Through Saturday afternoon * A major Pacific storm will bring heavy rain to the area this afternoon and evening. The period of greatest impact is through 8 pm this evening. Forecast rainfall totals through Saturday: ORANGE COUNTY..............2.5 to 4 inches with up to 5 inches in the Santa Ana mountains. INLAND EMPIRE..............1.5 TO 3 inches. SAN DIEGO COUNTY...........1.5 TO 2.5 inches. DESERTS....................0.25 to 1.5 inch. Rainfall rates of a half an inch to one inch per hour are possible...which would lead to flash flooding and flooding of urbanized areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Monitor forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAZ055-056-180600- /O.CON.KSGX.FF.A.0003.000000T0000Z-170219T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of...Crestline...Lake Arrowhead... Big Bear City...Big Bear Lake...Running Springs...Wrightwood... Idyllwild-Pine Cove 248 PM PST Fri Feb 17 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Riverside County Mountains and San Bernardino County Mountains. * Through Saturday afternoon * A major Pacific storm will bring heavy rain to the area this afternoon and evening. The period of greatest impact is through 8 pm this evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MM
947 WGUS66 KSGX 180514 FFASGX Flood Watch National Weather Service San Diego CA 914 PM PST Fri Feb 17 2017 ...Moderate to heavy rain continues over the region tonight... ...Floods and flash floods likely... .A winter storm now moving through the region will bring moderate rainfall through tonight. Heavy cells within the areas of rain could briefly intensify the rainfall rates. Urban and small stream flooding is expected and flash floods are possible. CAZ043-048-050-057-058-060>062-065-552-554-181400- /O.CON.KSGX.FF.A.0003.000000T0000Z-170219T0000Z/ /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-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...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 914 PM PST Fri Feb 17 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Apple and Lucerne Valleys...Coachella Valley...Orange County Coastal Areas...Orange County Inland Areas...San Bernardino and Riverside County Valleys-The Inland Empire... San Diego County Coastal Areas...San Diego County Deserts... San Diego County Mountains...San Diego County Valleys...San Gorgonio Pass Near Banning and Santa Ana Mountains and Foothills. * Through Saturday afternoon. * A major Pacific storm will continue to bring rain to the area tonight. Expected rainfall totals through Saturday: ORANGE COUNTY..............2.5 to 4 inches with up to 5 inches in the Santa Ana mountains. INLAND EMPIRE..............1.5 TO 3 inches. SAN DIEGO COUNTY...........1.5 TO 2.5 inches. DESERTS....................0.25 to 1.5 inch. Rainfall rates of a half an inch to one inch per hour are possible...which would lead to flash flooding and flooding of urbanized areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Monitor forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAZ055-056-181400- /O.CON.KSGX.FF.A.0003.000000T0000Z-170219T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of...Crestline...Lake Arrowhead... Big Bear City...Big Bear Lake...Running Springs...Wrightwood... Idyllwild-Pine Cove 914 PM PST Fri Feb 17 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Riverside County Mountains and San Bernardino County Mountains. * Through Saturday afternoon. * A major Pacific storm will continue to bring locally heavy rain to the area tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
871 WGUS66 KSGX 181134 FFASGX Flood Watch National Weather Service San Diego CA 334 AM PST Sat Feb 18 2017 ...Scattered showers and a slight chance of thunderstorms today with locally heavy rainfall... .A low pressure system will continue to move slowly inland through Southern California today. Bands of showers will continue to move inland today along with a slight chance of thunderstorms. Brief heavy rainfall is possible. This additional rainfall on top of soils saturated by recent heavy rainfall could cause rapid runoff and the possibility of urban and small stream flooding and flash flooding. CAZ043-048-050-057-058-060>062-065-552-554-182230- /O.CON.KSGX.FF.A.0003.000000T0000Z-170219T0000Z/ /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-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...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 334 AM PST Sat Feb 18 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch continues for * A portion of southwest California...including the following areas...Apple and Lucerne Valleys...Coachella Valley...Orange County Coastal Areas...Orange County Inland Areas...San Bernardino and Riverside County Valleys-The Inland Empire... San Diego County Coastal Areas...San Diego County Deserts... San Diego County Mountains...San Diego County Valleys...San Gorgonio Pass Near Banning and Santa Ana Mountains and Foothills. * Through this afternoon * Scattered showers and a slight chance of thunderstorms. * Brief heavy rainfall could cause rapid runoff with urban and small stream flooding and flash flooding possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Monitor forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAZ055-056-182230- /O.CON.KSGX.FF.A.0003.000000T0000Z-170219T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of...Crestline...Lake Arrowhead... Big Bear City...Big Bear Lake...Running Springs...Wrightwood... Idyllwild-Pine Cove 334 AM PST Sat Feb 18 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON... The Flash Flood Watch continues for * Through this afternoon * Scattered showers and a slight chance of thunderstorms. * Brief heavy rainfall could cause rapid runoff with urban and small stream flooding and flash flooding possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 17
087 WGUS66 KSGX 182103 FFASGX Flood Watch National Weather Service San Diego CA 103 PM PST Sat Feb 18 2017 CAZ043-048-050-055>058-060>062-065-552-554-182215- /O.CAN.KSGX.FF.A.0003.000000T0000Z-170219T0000Z/ /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 103 PM PST Sat Feb 18 2017 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for a portion of southwest California has been cancelled. Scattered showers, and even an isolated thunderstorm may develop later today, but the threat of heavy rainfall has decreased. $$ JAD
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 Feb 15, 9:47 AM PST, 4 hours 20 minutes earlier.
Area forecast discussion, Feb 15, 9:47 AM PST, 4 hours 20 minutes before
Area Forecast Discussion National Weather Service San Diego CA 947 AM PST Wed Feb 15 2017 ...High Impact Pacific Storm to Affect Southern California Friday-Saturday... .SYNOPSIS... After a tranquil weather period continuing through Thursday, all eyes turn to a major, high impact Pacific storm system which will affect Southern California Friday through Saturday. This storm will be significant, bringing heavy rainfall capable of producing flash flooding, damaging winds, and heavy high mountain snowfall to Southern California. The storm will exit the area late Saturday with dry weather returning Sunday through Monday. Additional lighter precipitation is possible by the middle part of next week. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... ...Update... The fog has lifted with significant visibility improvement seen over the past hour. A nice day is expected with mostly sunny skies and warm temps. Fog is again expected tonight from the coast and into the inland valleys, where it could again become locally dense. All eyes are on a high impact Pacific storm system to affect Southern California Friday-Saturday, bringing heavy rainfall capable of producing flash flooding, damaging winds, and heavy high mountain snowfall. Watches are currently be coordinated and will be issued early this afternoon. Stay tuned. ...Previous Discussion (Issued at 405 AM PST Wed Feb 15 2017)... Coastal clouds are swirling around and even some dense fog has appeared near the coast. A touch of offshore flow this morning will sweep away the coastal fog early. We will be left with mostly sunny skies with some high clouds and quite warm weather under high pressure aloft. Patchy coastal fog will return tonight into Thursday, otherwise skies will gradually cloud up in all areas. A plume of deep moisture will begin to nose into Southern California Thursday night and there is a slight chance of light showers. The real system arrives Friday with energy and copious moisture. The models are still a little unsettled on the exact timing of the heaviest band of rain, but are beginning to show the band move through Friday afternoon through the night. Very strong southerly winds will develop Friday and peak Friday afternoon and evening. Gales are expected over the water with some gusts gusts up to 45 mph along the coast. Gusts over the San Bernardino Mountains will top 70 mph. Snow levels will be above 7000 feet for most of the heavy precip episode, then drop to about 5000 feet Saturday in showers. For the period Friday through Sunday, rain totals will be 1.5 to 4 inches in the coast and valleys, and 3 to 5 inches in the mountains up to 7 inches around Lytle Creek and Crestline. Deserts less than 1.5 inches. Snowfall could exceed 18 inches in some spots. Some sort of flooding can be expected, either the urban kind during the heaviest deluges or stream flooding. They low pressure trough dives southward and into Baja California Saturday. Winds will quickly diminish and steady heavy rain will turn to showers. Some showers will linger into Sunday, but the drying trend will have begun. Dry weather appears Monday, before the next plume of moisture approaches the region Tuesday. A trough of low pressure brings that moisture close, but not in convincing fashion. Accordingly, we have small chances of rain in the forecast Tuesday and Wednesday. && .AVIATION... 151638Z...Coast/Valleys...BKN-OVC low stratus/dense fog within 5-10 sm of the coast, with bases 200-300 ft msl, tops around 500 ft msl, and areas of vis 1/4-2 sm, should lift and clear through 1800 UTC. Morning marine layer inversion strength of 9 deg C. 1800-16/0400 UTC, primarily P6SM vis except for the chance of lingering BKN clouds 200-500 ft msl with local vis 1/4 sm within 2 sm of the coast. 16/0400-1500 UTC, low stratus/dense fog likely developing again within 5-10 sm of the coast, with bases and tops similar to this morning, and areas of vis 1/4-1 sm, including possibly VCNTY KSAN, KCRQ and KSNA. Confidence in dense fog impacting KSAN, KCRQ and KSNA tonight/Thursday morning is moderate. Mountains/Deserts...P6SM vis through Thursday morning with FEW-SCT clouds AOA 20000 ft msl becoming BKN-SCT after 16/0000 UTC. && .MARINE... Areas of dense fog may clear and lift late this morning but more dense fog producing visibilities of 1 nm or less is likely to occur again tonight/Thursday morning. A strong storm system is expected to bring gale force southerly winds late Friday morning through Friday night, with strongest winds potentially touching 45 kt Friday evening. A Gale Watch will likely need to be issued. A couple of large west swells will occur as well, the first arriving Thursday night at 9 feet/17 sec/285 degrees and the second more powerful swell arriving late Saturday peaking at 17 feet/14 sec/270 degrees. The combination of large wind waves and the west swells will create hazardous seas Thursday night through Sunday. Periods of rain expected late Thursday night through Sunday, with the heaviest rain and squalls Friday afternoon and Friday night. && .BEACHES... A large long-period west-northwest swell from 285 degrees will create high surf conditions starting Thursday night/early Friday, with surf of 5-9 ft with locally higher sets possible. Seas and surf will build further Friday night, peaking Saturday at 17 ft/15 seconds from the 270 degree direction then lowering gradually on Sunday. This will result in very large, and potentially damaging surf of 10-15 ft Saturday. Relatively low high tides, around 4 to 4.5 feet, will mitigate significant coastal flooding threat, but some low-lying coastal areas could still be at risk of minor coastal flooding due to how high the surf could get. Powerful rip currents will accompany the high surf as well. && .SKYWARN... Skywarn activation is not requested today through Thursday. A major storm system will arrive on Friday and spotter activation will be needed then. && .SGX WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...None. && PUBLIC...Gregoria (Update)/MM AVIATION/MARINE...Harrison
In the hours before
Local storm report, Feb 15, 10:30 AM PST, 3 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1030 AM PST WED FEB 15 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0831 AM DENSE FOG 3 ENE COSTA MESA 33.68N 117.87W
02/15/2017 ORANGE CA ASOS
JOHN WAYNE AIRPORT REPORTS INTERMITTENT
VISIBILITY OF ONE QUARTER MILE FROM 3:53 AM
TO 8:31 AM.
0821 AM DENSE FOG IMPERIAL BEACH 32.57N 117.11W
02/15/2017 SAN DIEGO CA ASOS
IMPERIAL BEACH NAVAL AUXILIARY LANDING FIELD
ASOS REPORTED VISIBILITY OF A QUARTER MILE
FROM 314 AM TO 540 AM AND AGAIN AT 821 AM. .
0805 AM DENSE FOG 1 SE LOS ALAMITOS 33.79N 118.05W
02/15/2017 ORANGE CA AWOS
LOS ALAMITOS AIRFIELD REPORTS VISIBILITY OF
ONE QUARTER MILE OR LESS FROM 2:17 TO 8:05
AM.
0755 AM DENSE FOG 9 W SANTEE 32.87N 117.14W
02/15/2017 SAN DIEGO CA ASOS
MIRIMAR MCAS/MITSCHER FIELD AIRPORT REPORTS
INTERMITTENT VISIBILITY OF ONE QUARTER MILE
FROM 2:12 AM TO 7:55 AM.
0753 AM DENSE FOG CARLSBAD 33.13N 117.28W
02/15/2017 SAN DIEGO CA ASOS
CARLSBAD AIRPORT REPORTS INTERMITTENT
VISIBILITY OF ONE QUARTER MILE FROM 3:14 AM
TO 7:53 AM.
0753 AM DENSE FOG 7 N SAN DIEGO 32.82N 117.14W
02/15/2017 SAN DIEGO CA ASOS
MONTGOMERY FIELD REPORTS VISIBILITY OF ONE
QUARTER MILE FROM 1:07 AM TO 7:53 AM.
0752 AM DENSE FOG 2 SE CAMP PENDLETON SOU 33.22N 117.35W
02/15/2017 SAN DIEGO CA ASOS
OCEANSIDE AIRPORT REPORTS INTERMITTENT
VISIBILITY OF ONE QUARTER MILE FROM 4:16 AM
TO 7:52 AM.
0728 AM DENSE FOG 2 WNW CORONADO 32.69N 117.21W
02/15/2017 SAN DIEGO CA ASOS
NORTH ISLAND NAVAL AIR STATION REPORTS
INTERMITTENT VISIBILITY OF ONE QUARTER MILE
FROM 3:39 AM TO 7:28 AM. .
0637 AM DENSE FOG 9 NW CAMP PENDLETON SOU 33.32N 117.49W
02/15/2017 SAN DIEGO CA ASOS
MCOLF CAMP PENDLETON REPORTS INTERMITTENT
VISIBILITY OF ONE QUARTER MILE FROM 3:28 AM
TO 6:37 AM.
0627 AM DENSE FOG 2 NW SAN DIEGO 32.73N 117.19W
02/15/2017 SAN DIEGO CA ASOS
SAN DIEGO INTERNATIONAL AIRPORT REPORTS
INTERMITTENT VISIBILITY OF ONE QUARTER MILE
FROM 3:24 AM TO 6:27 AM.
&&
NWS SAN DIEGO CA
IRIS SYSTEMThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 15, 4:00 AM PST | Dense Fog Advisory | SGX | Orange, San Diego | 5 hr |
| Feb 15, 11:55 AM PST | Gale Watch | SGX | 20 hr | |
| Feb 15, 12:10 PM PST | Beach Hazards Statement | SGX | Orange, San Diego | 25 hr |
| Feb 15, 1:54 PM PST | Winter Storm Watch | SGX | Riverside, San Bernardino | 19 hr |
| Feb 15, 2:07 PM PST | High Wind Watch | SGX | Orange, Riverside, San Bernardino, San Diego | 19 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.