Alert archive / California / Flash Flood Warnings in 2016

Flash Flood Warning 7, NWS San Diego, CA

January 6, 2016San Diego County, California

NWS San Diego, CA issued this flash flood warning at Jan 6, 2016, 3:12 PM PST for San Diego County, California. It was in force for 3 hr. 9 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jan 6, 2016, 3:12 PM PST (23:12 UTC)
Expired
Jan 6, 2016, 6:15 PM PST
In force
3 hr
Issued by
NWS San Diego, CA
Area
Storm-based polygon
Flood severity
None

County San Diego County, CA

The radar

The San Diego radar (KNKX), 27 km from the middle of the area, began a volume at 23:13 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.

What was reported inside it

TimeReportWhereRemark
Jan 6, 3:12 PM PSTFLOOD6 Sse Del Mar, CAGENESEE AVENUE OFF RAMP FROM INTERSTATE 5 IS FLOODED. SEVERAL CARS ARE STUCK. THE OFF-RAMP CLOSED.
Jan 6, 3:12 PM PSTFLASH FLOOD6 Sse Del Mar, CAGENESEE AVENUE OFF RAMP FROM INTERSTATE 5 IS FLOODED. SEVERAL CARS ARE STUCK. THE OFF-RAMP CLOSED.
Jan 6, 4:45 PM PSTFLASH FLOOD1 Sse Lakeside, CAFLASH FLOODING NEAR LOS COCHES AND BUSINESS 8. 6 TO 2.5 FT OF WATER FLOWING OVER ROAD.
Jan 6, 4:45 PM PSTFLASH FLOOD1 Ssw El Cajon, CAFLASH FLOODING NEAR EL CAJON BLVD AND MAIN STREET. 6-12 OF WATER FLOWING OVER ROAD.
Jan 6, 4:45 PM PSTFLASH FLOOD1 Wsw El Cajon, CAFLASH FLOODING NEAR EL CAJON BLVD AND MAIN STREET. 6-12 OF WATER FLOWING OVER ROAD.
Jan 6, 5:00 PM PSTFLOOD7 Nnw San Diego, CANORTHBOUND OFF RAMP FROM INTERSTATE 5 TO GRAND AVENUE IS CLOSED DUE TO SEVERE FLOODING.
Jan 6, 5:05 PM PSTFLASH FLOOD1 Nw El Cajon, CA1.5 FT. DEEP WATER ON JOHNSON AV NEXT TO PARKWAY PLAZA
Jan 6, 5:05 PM PSTFLASH FLOOD1 Wnw El Cajon, CA1.5 FT. DEEP WATER ON JOHNSON AV NEXT TO PARKWAY PLAZA
Jan 6, 5:15 PM PSTFLASH FLOOD5 Nne San Diego, CAWARD ROAD IN MISSION VALLEY FLOODED, SEVERAL CARS SUBMERGED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 11.2 hours before the alert went out and 13 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.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2016-01-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2016-01-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
17 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
791 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

921 
WGUS56 KSGX 062312
FFWSGX
CAC073-070215-
/O.NEW.KSGX.FF.W.0007.160106T2312Z-160107T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
312 PM PST WED JAN 6 2016

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL SAN DIEGO COUNTY IN SOUTHWESTERN CALIFORNIA...

* UNTIL 615 PM PST
    
* AT 309 PM PST...DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS
  PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING WILL
  LIKELY BEGIN SHORTLY IN SOUTHERN SAN DIEGO COUNTY INCLUDING THE
  CITY OF SAN DIEGO. URBAN FLASH FLOODING WILL DEVELOP ALONG WITH
  RAPID FLOW INTO THE SAN DIEGO RIVER. RAINFALL RATES OF 0.25 TO
  MUCH AS 0.75 INCHES ARE EXPECTED. THIS INCLUDES INLAND VALLEYS
  AND COASTAL HILLS AND MESAS.  

* SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE...
  CHULA VISTA...EL CAJON...NATIONAL CITY...LA MESA...POWAY...IMPERIAL
  BEACH...RAMONA...CORONADO...ALPINE AND NORTH PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW AND AVOID LOW LYING AREAS. ACT QUICKLY TO
PROTECT YOUR LIFE.

&&

LAT...LON 3259 11714 3260 11710 3269 11714 3270 11715
      3268 11717 3268 11715 3264 11714 3268 11718
      3269 11723 3272 11721 3270 11716 3273 11718
      3273 11722 3267 11724 3268 11725 3290 11724
      3306 11682 3257 11674 3254 11712

$$

TARDY
3 follow-up statements
628 
WGUS76 KSGX 070010
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
410 PM PST WED JAN 6 2016

CAC073-070215-
/O.CON.KSGX.FF.W.0007.000000T0000Z-160107T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
410 PM PST WED JAN 6 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PST FOR
SOUTH CENTRAL SAN DIEGO COUNTY...

AT 405 PM PST...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY
RAIN ACROSS THE WARNED AREA.  FLASH FLOODING IS EXPECTED TO OCCUR
ESPECIALLY IN LA JOLLA AND ROSE CANYON WHERE OVER 1 INCH OF RAIN HAS
OCCURRED IN THE PAST COUPLE HOURS.

ADDITIONAL RAINFALL OF 0.50 TO 1.00 INCHES IS EXPECTED THROUGH 6 PM.
TRIBUTARIES WILL CONTINUE TO BRING SIGNIFICANT WATER FLOWS INTO THE
SAN DIEGO RIVER WHICH WILL BEGIN RISING AGAIN.

SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE...
CHULA VISTA...EL CAJON...NATIONAL CITY...LA MESA...POWAY...IMPERIAL
BEACH...RAMONA...CORONADO...ALPINE AND NORTH PARK.

LAT...LON 3259 11714 3260 11710 3269 11714 3270 11715
      3268 11717 3268 11715 3264 11714 3268 11718
      3269 11723 3272 11721 3270 11716 3273 11718
      3273 11722 3267 11724 3268 11725 3290 11724
      3306 11682 3257 11674 3254 11712

$$

TARDY
597 
WGUS76 KSGX 070122
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
522 PM PST WED JAN 6 2016

CAC073-070215-
/O.CON.KSGX.FF.W.0007.000000T0000Z-160107T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
522 PM PST WED JAN 6 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PST FOR
SOUTH CENTRAL SAN DIEGO COUNTY...

AT 514 PM PST...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY
RAIN HAVE EXITED THE WARNED AREA.  FLASH FLOODING WILL CONTINUE DUE
TO EXCESSIVE RUNOFF FROM 1 TO 1.5 INCHES OF RAIN. SAN DIEGO POLICE IS
REPORTING FLOODING IN SORRETTO VALLEY...MIDWAY AND EL CAJON.

ADDITIONAL SHOWERS WILL DEVELOP THIS EVENING...ESPECIALLY BETWEEN 7
AND 10 PM.

WATER IS UP TO RAILROAD TRACKS IN SORRETO VALLEY. THE I-5 EXIT AND
UNDERPASS AT GRAND AVENUE AND GARNET ARE CLOSED ON NORTHBOUND I-5. 

TURN AROUND DONT DROWN. ROAD CLOSURES ARE OCCURRING IN THIS AREAS.
OBEY ROAD CLOSURES. 

SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE...
CHULA VISTA...EL CAJON...NATIONAL CITY...LA MESA...POWAY...IMPERIAL
BEACH...RAMONA...CORONADO...ALPINE AND NORTH PARK.


LAT...LON 3259 11714 3260 11710 3269 11714 3270 11715
      3268 11717 3268 11715 3264 11714 3268 11718
      3269 11723 3272 11721 3270 11716 3273 11718
      3273 11722 3267 11724 3268 11725 3290 11724
      3306 11682 3257 11674 3254 11712

$$

TARDY
618 
WGUS76 KSGX 070216
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
616 PM PST WED JAN 6 2016

CAC073-070219-
/O.EXP.KSGX.FF.W.0007.000000T0000Z-160107T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
616 PM PST WED JAN 6 2016

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL SAN DIEGO COUNTY WILL
EXPIRE AT 615 PM PST...

THE HEAVY RAIN HAS ENDED...HOWEVER ADDITIONAL MODERATE TO HEAVY
SHOWERS WILL REDEVELOP THIS EVENING. SHOWERS WILL HAVE THE POTENTIAL
TO PRODUCE 0.25 TO 0.50 INCHES IN ONE HOUR TONIGHT THROUGH EARLY
THURSDAY. 

RISES TO THE SAN DIEGO RIVER WILL CONTINUE OVERNIGHT (FLWSGX).

PLEASE CONTINUE TO HEED ALL ROAD CLOSURES. 

LAT...LON 3259 11714 3260 11710 3269 11714 3270 11715
      3268 11717 3268 11715 3264 11714 3268 11718
      3269 11723 3272 11721 3270 11716 3273 11718
      3273 11722 3267 11724 3268 11725 3290 11724
      3306 11682 3257 11674 3254 11712

$$

TARDY

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 5, 4:11 PM PSTFlash Flood WarningSGXSan Diego3 hr
Jan 5, 6:46 PM PSTAreal Flood AdvisorySGXRiverside, San Diego4 hr
Jan 5, 8:28 PM PSTRiver Flood WarningSGXSan Diego9 hr
Jan 6, 4:05 AM PSTWind AdvisorySGXOrange, San Diego14 hr
Jan 6, 4:28 AM PSTFlash Flood WatchSGXOrange, Riverside, San Bernardino, San Diego32 hr
Jan 6, 10:36 AM PSTBeach Hazards StatementSGXOrange, San Diego15 hr
Jan 6, 10:36 AM PSTHigh Surf WarningSGXOrange, San Diego59 hr
Jan 6, 12:00 PM PSTRiver Flood WarningSGXSan Diego29 hr
Jan 6, 12:10 PM PSTFlash Flood WarningSGXOrange5 hr
Jan 6, 12:35 PM PSTSpecial Marine WarningSGX55 min
Jan 6, 12:40 PM PSTAreal Flood WarningSGXOrange, Riverside, San Bernardino6 hr
Jan 6, 12:45 PM PSTSpecial Marine WarningSGX45 min
Jan 6, 12:46 PM PSTSevere Thunderstorm WarningSGXOrange, Riverside, San Bernardino44 min
Jan 6, 1:04 PM PSTSevere Thunderstorm WarningSGXOrange, Riverside, San Diego56 min
Jan 6, 1:23 PM PSTSpecial Marine WarningSGX37 min
Jan 6, 1:30 PM PSTSpecial Marine WarningSGX45 min
Jan 6, 1:34 PM PSTFlash Flood WarningSGXOrange, Riverside, San Bernardino, San Diego3 hr
Jan 6, 1:50 PM PSTSpecial Marine WarningSGX40 min
Jan 6, 2:09 PM PSTSpecial Marine WarningSGX96 min
Jan 6, 2:23 PM PSTSevere Thunderstorm WarningSGXSan Diego52 min
Jan 6, 2:45 PM PSTSpecial Marine WarningSGX60 min
Jan 6, 2:54 PM PSTTornado WarningSGXSan Diego20 min
Jan 6, 2:56 PM PSTTornado WarningSGXSan Diego19 min
Jan 6, 3:19 PM PSTSevere Thunderstorm WarningSGXSan Diego43 min
Jan 6, 3:50 PM PSTSpecial Marine WarningSGX85 min

Nearby

Flash Flood Warnings in California, 2016Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.