Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 6, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Feb 17, 2017, 5:12 PM PST for Orange County, Riverside County, San Bernardino County, California. It was in force for 4 hr. 4 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
- Feb 17, 2017, 5:12 PM PST (01:12 UTC)
- Expired
- Feb 17, 2017, 9:00 PM PST
- In force
- 4 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Orange County, CA, Riverside County, CA, San Bernardino County, CA
The radar
The Santa Ana Mts radar (KSOX), 8 km from the middle of the area, began a volume at 01:14 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 |
|---|---|---|---|
| Feb 17, 5:20 PM PST | FLOOD | 5 E Wrightwood, CA | ROAD WASHED OUT AND A VEHICLE IS NOW STUCK. . |
| Feb 17, 5:55 PM PST | FLASH FLOOD | 7 Sw Mountain View Acre, CA | LARGE SINK HOLE ON CHATEAU RD/CEDAR ST, JEEP UNDERWATER IN SINKHOLE. . |
| Feb 17, 6:53 PM PST | FLASH FLOOD | 3 Se Garden Grove, CA | MOBILE HOME COMPLEX FLOODING DUE TO OVERFLOWING OF THE WINTERSBURG CHANNEL. |
| Feb 17, 8:15 PM PST | FLASH FLOOD | 9 Ese Wrightwood, CA | FIRE TRUCK FELL INTO SINKHOLE ON I-15 AND INTERCHANGE HWY 138, AFTER LANE #5 COLLAPSED DUE TO FLOODING. . |
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 00:00Z, 1.2 hours before the alert went out and 128 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
- 14 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1020 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 307 m²/s²
- 0-3 km storm-relative helicity
- 383 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
638
WGUS56 KSGX 180112
FFWSGX
CAC059-065-071-180500-
/O.NEW.KSGX.FF.W.0006.170218T0112Z-170218T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Diego CA
512 PM PST FRI FEB 17 2017
The National Weather Service in San Diego has issued a
* Flash Flood Warning for...
Orange County in southwestern California...
San Bernardino County in southern California...
Riverside County in southern California...
* Until 900 PM PST
* At 506 PM PST, Doppler radar indicated heavy rain across the
warned area with the heaviest rain moving onshore the Orange
County coast which will move east and another area of enhanced
heavier rain occurring along the coastal mountain slopes of the
San Bernardino County mountains and through the Cajon Pass.
Rainfall of 1 to 2 inches has already fallen along the coastal
mountain slopes with a half to one inch across Orange County.
Flash flooding will likely begin shortly. In addition, excessive
rainfall will likely result in debris flows within and downstream
of the 2016 Blue Cut Fire burn scar, including railways.
The debris flow can consist of rock, mud, vegetation and other
loose materials. Highway 138 is closed due to 1 to 2 feet of mud
covering Lone Pine Road. Rainfall rates of around 1 inch per hour
will occur in the heaviest bands of rain.
* Some locations that will likely experience flooding include...
Anaheim, Santa Ana, Riverside, Irvine, San Bernardino, Fontana,
Huntington Beach, Garden Grove, Ontario, Corona, Orange,
Fullerton, Costa Mesa, Rialto and Mission Viejo, I-15 Through The
Cajon Pass, and areas in and around the Blue Cut Fire burn scar.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
&&
LAT...LON 3385 11805 3390 11798 3395 11797 3395 11779
3398 11780 3402 11777 3402 11773 3420 11767
3422 11756 3437 11762 3452 11758 3438 11713
3357 11730 3350 11742 3351 11751 3347 11751
3345 11758 3340 11759 3354 11779 3374 11812
$$
Gregoria1 follow-up statement
730
WGUS76 KSGX 180234
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
634 PM PST FRI FEB 17 2017
CAC059-065-071-180500-
/O.CON.KSGX.FF.W.0006.000000T0000Z-170218T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orange CA-San Bernardino CA-Riverside CA-
634 PM PST FRI FEB 17 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM PST FOR
ORANGE...SAN BERNARDINO AND RIVERSIDE COUNTIES...
At 627 PM PST, Doppler radar indicated heavy rain across the warned
area which will produce flash flooding. Most locations have received
an inch of rain with some locales to around 2 inches. Additional
rain amounts of a quarter to half an inch per hour will result in
flash flooding. In addition, excessive rainfall will likely result
in debris flows within and downstream of the 2016 Blue Cut Fire burn
scar, including railways. The debris flow can consist of rock, mud,
vegetation and other loose materials.
Some locations that will likely experience flooding include...
Anaheim, Santa Ana, Riverside, Irvine, San Bernardino, Fontana,
Huntington Beach, Garden Grove, Ontario, Corona, Orange, Fullerton,
Costa Mesa, Rialto, Mission Viejo, I-15 Through The Cajon Pass, and
areas in and around the Blue Cut Fire burn scar
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding. Swift moving water is dangerous. Make the smart
choice. Turn around, don't drown.
&&
LAT...LON 3385 11805 3390 11798 3395 11797 3395 11779
3398 11780 3402 11777 3402 11773 3420 11767
3422 11756 3437 11762 3452 11758 3438 11713
3357 11730 3350 11742 3351 11751 3347 11751
3345 11758 3340 11759 3354 11779 3374 11812
$$
GregoriaThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 4:51 PM PST | Severe Thunderstorm Warning | SGX | Orange | 54 min |
| Feb 17, 5:11 PM PST | Special Marine Warning | SGX | 94 min | |
| Feb 17, 5:43 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 62 min |
| Feb 17, 5:48 PM PST | Areal Flood Advisory | SGX | San Diego | 5 hr |
| Feb 17, 5:48 PM PST | Severe Thunderstorm Warning | SGX | Orange | 57 min |
| Feb 17, 6:21 PM PST | Flash Flood Warning | SGX | San Bernardino | 4 hr |
| Feb 17, 9:00 PM PST | Small Craft Advisory | SGX | 49 hr | |
| Feb 17, 10:15 PM PST | Areal Flood Warning | SGX | Riverside, San Bernardino | 9 hr |
| Feb 17, 10:50 PM PST | Areal Flood Advisory | SGX | Orange, Riverside, San Diego | 7 hr |
Nearby
Flash Flood Warnings in California, 2017Every flash flood warning in 2017
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.