Alert archive / California / Flash Flood Warnings in 2016
Flash Flood Warning 1, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jan 5, 2016, 12:06 PM PST for Orange County, California. It was in force for 4 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
- Jan 5, 2016, 12:06 PM PST (20:06 UTC)
- Expired
- Jan 5, 2016, 4:00 PM PST
- In force
- 4 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Orange County, CA
The radar
The Santa Ana Mts radar (KSOX), 8 km from the middle of the area, began a volume at 20:10 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, 8.1 hours before the alert went out and 112 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
- 4 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 474 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
118
WGUS56 KSGX 052006
FFWSGX
CAC059-060000-
/O.NEW.KSGX.FF.W.0001.160105T2006Z-160106T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1206 PM PST TUE JAN 5 2016
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN ORANGE COUNTY IN SOUTHWESTERN CALIFORNIA...
* UNTIL 400 PM PST
* AT 1205 PM PST...DOPPLER RADAR INDICATED HEAVY RAIN APPROACHING
THE SILVERADO CANYON AREA. FLASH FLOODING WILL LIKELY BEGIN
SHORTLY. IN ADDITION...EXCESSIVE RAINFALL WILL LIKELY RESULT IN
DEBRIS FLOWS WITHIN AND DOWNSTREAM OF THE 2014 SILVERADO FIRE BURN
SCAR. THE DEBRIS FLOW CAN CONSIST OF ROCK...MUD...VEGETATION AND
OTHER LOOSE MATERIALS. SILVERADO CANYON...INCLUDING HOMES AND
BUSINESSES IN AND AROUND SILVERADO CANYON ROAD...WILL LIKELY BE
IMPACTED. THIS IS A DANGEROUS SITUATION FOR SILVERADO CANYON
RESIDENTS...AND IMMEDIATE MEASURES SHOULD BE TAKEN TO PROTECT LIFE
AND PROPERTY.
* FLASH FLOODING WILL REMAIN OVER MAINLY RURAL AREAS OF NORTHEASTERN
ORANGE COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 3377 11759 3376 11756 3374 11757 3373 11760
3376 11762
$$
HARRISON2 follow-up statements
362
WGUS76 KSGX 052211
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
211 PM PST TUE JAN 5 2016
CAC059-060000-
/O.CON.KSGX.FF.W.0001.000000T0000Z-160106T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE CA-
211 PM PST TUE JAN 5 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM PST FOR
THE SILVERADO BURN SCAR IN THE SANTA ANA MOUNTAINS OF
ORANGE COUNTY...
AT 157 PM PST...THE BAND OF HEAVY RAIN THAT MOVED ACROSS THE BURN
SCAR BETWEEN NOON AND 2 PM WAS MOVING EAST INTO THE INLAND EMPIRE. 3-
HOUR RAIN TOTALS BETWEEN 11 AM AND 2 PM INCLUDE 1.74" AT UPPER
HARDING CANYON...AND 1.58" AT SILVERADO CANYON. SCATTERED SHOWERS
WILL CONTINUE THROUGH THE AFTERNOON...BUT THE HEAVIEST RAIN HAS
PASSED. MORE HEAVY RAIN IS EXPECTED OVER THE AREA WEDNESDAY
AFTERNOON AND EVENING WHEN AN ADDITIONAL 1-3" OF RAIN IS POSSIBLE
OVER THE BURN SCAR.
THIS FIRST WAVE OF RAIN HAS STARTED TO SATURATE THE GROUND. A
MODERATE MUD SLIDE HAS BLOCKED PART OF UPPER SILVERADO CANYON ROAD.
MORE HEAVY RAIN ON WEDNESDAY MAY RESULT IN MORE DEBRIS FLOWS
CONSISTING OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND DURING HEAVY RAIN AND FLASH FLOOD EVENTS.
&&
LAT...LON 3377 11759 3376 11756 3374 11757 3373 11760
3376 11762
$$
MOEDE645
WGUS76 KSGX 052358
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
358 PM PST TUE JAN 5 2016
CAC059-060005-
/O.EXP.KSGX.FF.W.0001.000000T0000Z-160106T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE CA-
358 PM PST TUE JAN 5 2016
...THE FLASH FLOOD WARNING FOR NORTHEASTERN ORANGE COUNTY WILL EXPIRE
AT 400 PM PST...
THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER A THREAT OVER
THE BURN SCAR TONIGHT.
THE GROUND HAS STARTED TO SATURATE. MORE HEAVY RAIN IS ANTICIPATED
WEDNESDAY AFTERNOON AND EVENING WHEN FLASH FLOODING AND MUD SLIDES
WILL ONCE AGAIN BE POSSIBLE.
LAT...LON 3377 11759 3376 11756 3374 11757 3373 11760
3376 11762
$$
MOEDEThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 4, 7:34 PM PST | Small Craft Advisory | SGX | 4 days | |
| Jan 5, 11:58 AM PST | Areal Flood Advisory | SGX | Orange, Riverside, San Bernardino | 5 hr |
| Jan 5, 1:46 PM PST | Flash Flood Warning | SGX | Riverside, San Diego | 3 hr |
| Jan 5, 1:51 PM PST | Areal Flood Advisory | SGX | Orange, Riverside, San Diego | 4 hr |
| Jan 5, 3:14 PM PST | Flash Flood Warning | SGX | San Diego | 3 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.