Flash Flood Warning 19, NWS San Diego, CA

Issued

Jul 28, 1999, 4:43 PM PDT (23:43 UTC)

Expired

Jul 28, 1999, 5:15 PM PDT

In force

32 min

Issued by

NWS San Diego, CA

Area

Whole counties

County San Diego County, CA

000 
TTAA00 KSGX 282346
FFWSAN
CAC073-290015-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
443 PM PDT WED JUL 28 1999

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN SAN DIEGO COUNTY IN CALIFORNIA

* UNTIL 515 PM PDT

* THE FLASH FLOOD WARNING FOR NORTHEAST SAN DIEGO COUNTY HAS BEEN    
  EXTENDED UNTIL 515 PM. AT 440 PM...WEATHER SERVICE DOPPLER RADAR   
  INDICATED MODERATE RAINFALL OVER A BROAD AREA OF NORTHEAST AND     
  EAST CENTRAL SAN DIEGO COUNTY AROUND BORREGO SPRINGS. RUNOFF FROM  
  HEAVY RAINFALL SINCE 3 PM IS LIKELY STILL OCCURRING WITH CONTINUED 
  FLOODING OF LOW AREAS LIKELY.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS
AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
SAN DIEGO.

LAT...LON 3314 11649 3292 11630 3292 11^611 3338 11609

$$

MARTIN

NWS San Diego, CA wrote its last area forecast discussion before this flash flood warning went out at Jul 28, 2:05 PM PDT, 2 hours 38 minutes earlier.

EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
205 PM PDT WED JUL 28 1999

                         ...SYNOPSIS...
A TROUGH OF LOW PRESSURE WILL REMAIN OFF THE WEST COAST THROUGH THE
WEEKEND WITH BROAD HIGH PRESSURE COVERING MOST OF THE SOUTHERN U.S.
MONSOONAL MOISTURE WILL CONTINUE TO AFFECT THE MOUNTAINS AND DESERTS
WITH SCATTERED THUNDERSTORMS THROUGH AT LEAST THURSDAY. AT THE
COAST...NIGHT AND MORNING LOW CLOUDS WILL CONTINUE. LITTLE
TEMPERATURE CHANGE IS EXPECTED THROUGH FRIDAY.

                        ...DISCUSSION...

SAT LOOPS AND RADAR SHOW SCATTERED SHOWERS AND ISOLATED HEAVY
THUNDERSTORMS HAVE BEEN AFFECTING THE MOUNTAIN AREAS SINCE MIDDAY.
RAINFALL RATES OF 3/4 TO 1 INCH PER HALF HOUR HAVE BEEN OBSERVED. A
SMALL STREAM FLOOD ADVISORY IS IN EFFECT UNTIL 500 PM.

12Z ETA MODEL SHOWS RAPID DRYING OF THE ATMOSPHERE OVER THE DESERTS
AND MTNS BY LATE TOMORROW WHILE THE AVN HOLDS ONTO MORE MOISTURE.
WILL CONTINUE WITH THUNDERSTORMS/SHOWERS THROUGH TOMORROW AND THEN
TREND DOWNEARD AS WEAK WAVE IN AZ GETS CAUGHT UP IN THE WESTERLIES.
AT THE COAST...LITTLE CHANGE IN THICKNESS AND ONSHORE GRADIENTS
LIKELY TO KEEP MARINE LAYER FAIRLY DEEP AND DIURNAL STRATUS AROUND
THROUGH FRIDAY...AS LONG AS SEA SURFACE TEMPS REMAIN CHILLY. WILL
KEEP TEMPS CONSISTENT WITH PREVIOUS FORECASTS.

LONGER RANGE...MRF AND ECMWF SHOW BETTER WESTERLY FLOW ALOFT FOR
DRYING AND NEAR NORMAL TEMPS INLAND.

SAN 000

.SAN...NONE.

JAD

Flash Flood Warnings in California, 1999Every flash flood warning in 1999

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.