Alert archive / California / Flash Flood Warnings in 2015

Flash Flood Warning 13, NWS San Diego, CA

July 19, 2015San Diego County, California

NWS San Diego, CA issued this flash flood warning at Jul 19, 2015, 5:59 PM PDT for San Diego County, California. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 19, 2015, 5:59 PM PDT (00:59 UTC)
Expired
Jul 19, 2015, 8:00 PM PDT
In force
2 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), 29 km from the middle of the area, began a volume at 01:00 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 00:00Z, 1.0 hours before the alert went out and 49 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 00:00Z on 2015-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 426 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 00:00Z on 2015-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -42 square meters per square second.193958Sfc1 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
426 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
725 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-42 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

758 
WGUS56 KSGX 200059
FFWSGX
CAC073-200300-
/O.NEW.KSGX.FF.W.0013.150720T0059Z-150720T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
559 PM PDT SUN JUL 19 2015

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

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

* UNTIL 800 PM PDT

* AT 556 PM PDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
  HEAVY RAIN FALLING ACROSS THE WARNED AREA. FLASH FLOODING IS
  ALREADY OCCURRING. IN ADDITION...EXCESSIVE RAINFALL WILL LIKELY
  RESULT IN DEBRIS FLOWS WITHIN AND DOWNSTREAM OF THE 2013 MOUNTAIN
  FIRE BURN SCAR IN THE SAN JACINTO WILDERNESS. THE DEBRIS FLOW CAN
  CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.

* SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE...
  POWAY...RAMONA...ALPINE...VALLEY CENTER...TIERRASANTA...
  ESCONDIDO...SAN MARCOS...SANTEE...SAN DIEGO COUNTRY ESTATES...
  DESCANSO...PALOMAR MOUNTAIN...HWY 79 BETWEEN SANTA YSABEL AND
  WARNER SPRINGS...SAN PASQUAL...HWY 78 BETWEEN RAMONA AND SANTA
  YSABEL...LAKE HENSHAW...S7 - EAST GRADE RD...SCRIPPS RANCH...
  LAKESIDE...PALOMAR MOUNTAIN STATE PARK AND HWY S2 BETWEEN HWY 79
  AND HWY 78.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT ENTER OR CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. 

&&

LAT...LON 3288 11661 3285 11705 3322 11718 3335 11684
      3324 11658 3308 11665

$$

PG
1 follow-up statement
750 
WGUS76 KSGX 200251
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
751 PM PDT SUN JUL 19 2015

CAC073-200300-
/O.EXP.KSGX.FF.W.0013.000000T0000Z-150720T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
751 PM PDT SUN JUL 19 2015

...THE FLASH FLOOD WARNING FOR CENTRAL SAN DIEGO COUNTY WILL EXPIRE
AT 800 PM PDT...

THE HEAVY RAIN HAS ENDED. HOWEVER...CONTINUING LIGHT RAIN SHOWERS 
COULD CONTINUE TO PRODUCE MINOR FLOODING FOR THE NEXT SEVERAL HOURS.

LAT...LON 3288 11661 3285 11705 3322 11718 3335 11684
      3324 11658 3308 11665

$$

PG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 6:29 PM PDTAreal Flood AdvisorySGXRiverside, San Diego3 hr
Jul 19, 6:32 PM PDTAreal Flood AdvisorySGXSan Diego4 hr
Jul 19, 9:12 PM PDTAreal Flood AdvisorySGXOrange, Riverside, San Bernardino6 hr

Nearby

Flash Flood Warnings in California, 2015Every flash flood warning in 2015

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.