Alert archive / California / Flash Flood Warnings in 2015
Flash Flood Warning 4, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jul 6, 2015, 12:49 PM PDT for San Bernardino County, California. It was in force for 4 hr. 1 report 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
- Jul 6, 2015, 12:49 PM PDT (19:49 UTC)
- Expired
- Jul 6, 2015, 4:45 PM PDT
- In force
- 4 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Santa Ana Mts radar (KSOX), 93 km from the middle of the area, began a volume at 19:49 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 1:16 PM PDT | FLASH FLOOD | 6 Se Big Bear Lake, CA | CHP REPORTED TREE BRANCHES, DIRT AND MUD BLOCKING ALL LANES OF HWY 38. INCIDENT COMMANDER AT THE LAKE FIRE ALSO REPORTED 4-5 INCHES OF MUD AND DEBRIS ACROSS HWY 38. |
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, 7.8 hours before the alert went out and 154 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
- 0 J/kg
- Mixed-layer LCL
- 464 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
289
WGUS56 KSGX 061949
FFWSGX
CAC071-062345-
/O.NEW.KSGX.FF.W.0004.150706T1949Z-150706T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1249 PM PDT MON JUL 6 2015
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 445 PM PDT
* AT 1247 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN ACROSS THE LAKE FIRE BURN SCAR. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY. EXCESSIVE RAINFALL OVER THE BURN SCAR
WILL LIKELY RESULT IN DEBRIS FLOWS. THE DEBRIS FLOW CAN CONSIST OF
ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.
* SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE... FOREST
FALLS...MOUNT SAN GORGONIO...ONYX SUMMIT...BIG BEAR LAKE... HWY 38
BETWEEN ONYX SUMMIT AND SUGARLOAF...ANGELUS OAKS...SEVEN
OAKS...HWY 38 BETWEEN YUCAIPA AND ONYX SUMMIT...SUGARLOAF...HEART
BAR CAMPGROUND...BARTON FLATS CAMPGROUND AND WOODLANDS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WATERSHEDS BURNED IN 2015 WITHIN AND DOWNSTREAM OF THE LAKE BURN AREA
ARE PARTICULARLY SUSCEPTIBLE TO FLASH FLOODS AND DEBRIS FLOWS FROM
THIS RAINSTORM.
&&
LAT...LON 3410 11659 3410 11660 3404 11662 3404 11696
3420 11700 3427 11665 3411 11656
$$
HARRISON3 follow-up statements
726
WGUS76 KSGX 062042
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 PM PDT MON JUL 6 2015
CAC071-062345-
/O.CON.KSGX.FF.W.0004.000000T0000Z-150706T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
142 PM PDT MON JUL 6 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR SAN
BERNARDINO COUNTY...
AT 134 PM PDT...CALTRANS AND FIRE OFFICIALS REPORTS THAT 4 TO 5
INCHES OF TREES...BRANCHES...DIRT AND MUD ARE BLOCKING ALL LANES ON
HIGHWAY 38 NEAR THE SOUTH FORK OF THE SANTA ANA RIVER DUE TO THE
EARLIER HEAVY RAIN. DOPPLER RADAR CURRENTLY INDICATES MOSTLY
STATIONARY THUNDERSTORMS JUST NORTHWEST OF THE LAKE FIRE BURN SCAR
NEAR HIGHWAY 38 WHICH WILL CONTINUE TO PRODUCE HEAVY RAIN AND
POSSIBLE FLASH FLOODING.
SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE... FOREST
FALLS...MOUNT SAN GORGONIO...ONYX SUMMIT...BIG BEAR LAKE...HWY 38
BETWEEN ONYX SUMMIT AND SUGARLOAF...ANGELUS OAKS...SEVEN OAKS... HWY
38 BETWEEN YUCAIPA AND ONYX SUMMIT...SUGARLOAF...HEART BAR
CAMPGROUND...BARTON FLATS CAMPGROUND AND WOODLANDS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WATERSHEDS BURNED IN 2015 WITHIN AND DOWNSTREAM OF THE LAKE BURN AREA
ARE PARTICULARLY SUSCEPTIBLE TO FLASH FLOODS AND DEBRIS FLOWS FROM
THIS RAINSTORM.
&&
LAT...LON 3410 11659 3410 11660 3404 11662 3404 11696
3420 11700 3427 11665 3411 11656
$$
HARRISON295
WGUS76 KSGX 062131
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
231 PM PDT MON JUL 6 2015
CAC071-062345-
/O.CON.KSGX.FF.W.0004.000000T0000Z-150706T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
231 PM PDT MON JUL 6 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR SAN
BERNARDINO COUNTY...
AT 224 PM PDT...SHOWERS AND THUNDERSTORMS CONTINUED OVER THE LAKE
FIRE BURN SCAR. RAIN HAD DECREASED IN INTENSITY BETWEEN 2:00 AND
2:15 PM...BUT MODERATE TO HEAVY SHOWERS WILL CONTINUE OVER THE SAN
BERNARDINO MOUNTAINS THROUGH THE AFTERNOON...SOME OF WHICH MAY DRIFT
OVER THE BURN SCAR. FLASH FLOODING IS POSSIBLE THROUGH THE
AFTERNOON.
EARLIER THIS AFTERNOON CALTRANS AND FIRE OFFICIALS REPORTED 4 TO 5
INCHES OF MUD AND WATER BLOCKING ALL LANES ON HIGHWAY 38 NEAR THE
SOUTH FORK OF THE SANTA ANA RIVER.
SOME LOCATIONS THAT WILL MAY EXPERIENCE FLOODING INCLUDE... FOREST
FALLS...MOUNT SAN GORGONIO...ONYX SUMMIT...BIG BEAR LAKE...HWY 38
BETWEEN ONYX SUMMIT AND SUGARLOAF...ANGELUS OAKS...SEVEN OAKS... HWY
38 BETWEEN YUCAIPA AND ONYX SUMMIT...SUGARLOAF...HEART BAR
CAMPGROUND...BARTON FLATS CAMPGROUND AND WOODLANDS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WATERSHEDS BURNED IN 2015 WITHIN AND DOWNSTREAM OF THE LAKE BURN AREA
ARE PARTICULARLY SUSCEPTIBLE TO FLASH FLOODS AND DEBRIS FLOWS FROM
THIS RAINSTORM.
&&
LAT...LON 3410 11659 3410 11660 3404 11662 3404 11696
3420 11700 3427 11665 3411 11656
$$
MOEDE658
WGUS76 KSGX 062343
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
443 PM PDT MON JUL 6 2015
CAC071-062347-
/O.EXP.KSGX.FF.W.0004.000000T0000Z-150706T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
443 PM PDT MON JUL 6 2015
...THE FLASH FLOOD WARNING FOR SAN BERNARDINO COUNTY WILL EXPIRE AT
445 PM PDT...
THE HEAVY RAIN HAS ENDED OVER THE LAKE FIRE BURN SCAR IN THE SAN
BERNARDINO MOUNTAINS. HEAVY RAINS FROM EARLIER THIS AFTERNOON
PRODUCED A 4 TO 12 INCH DEEP DEBRIS FLOW CONSISTING MOSTLY OF ASH
THAT COVERED HIGHWAY 38 NEAR AT SOUTH FORK SANTA ANA RIVER.
LAT...LON 3410 11659 3410 11660 3404 11662 3404 11696
3420 11700 3427 11665 3411 11656
$$
MOEDEThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 1:23 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.