Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 10, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 1, 2017, 3:42 PM PDT for Orange County, Riverside County, California. It was in force for 3 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
- Aug 1, 2017, 3:42 PM PDT (22:42 UTC)
- Expired
- Aug 1, 2017, 6:45 PM PDT
- In force
- 3 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Orange County, CA, Riverside County, CA
The radar
The Santa Ana Mts radar (KSOX), 37 km from the middle of the area, began a volume at 22:43 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 |
|---|---|---|---|
| Aug 1, 4:03 PM PDT | FLASH FLOOD | 4 Nw Lakeland Village, CA | MUD AND DEBRIS FLOW FROM A RECANT FIRE FLOWING OVER GRAND AVE. AND PLUMAS ST., BOTH ROADS CLOSED. |
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, 10.7 hours before the alert went out and 114 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1271 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
866
WGUS56 KSGX 012242
FFWSGX
CAC059-065-020145-
/O.NEW.KSGX.FF.W.0010.170801T2242Z-170802T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Diego CA
342 PM PDT TUE AUG 1 2017
The National Weather Service in San Diego has issued a
* Flash Flood Warning for...
Riverside County in southern California...
East central Orange County in southwestern California...
* Until 645 PM PDT
* At 341 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding will likely begin
shortly.
* Some locations that will likely experience flooding include...
Riverside, Moreno Valley, Lake Elsinore, Perris, San Jacinto, March
Airforce Base, Menifee, Sun City, Woodcrest, Temescal Valley, Lake
Mathews and Ortega Highway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
&&
LAT...LON 3395 11704 3383 11697 3367 11716 3363 11741
3373 11758 3389 11744 3397 11726
$$
Albright2 follow-up statements
536
WGUS76 KSGX 020000
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
500 PM PDT TUE AUG 1 2017
CAC059-065-020145-
/O.CON.KSGX.FF.W.0010.000000T0000Z-170802T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-Orange CA-
500 PM PDT TUE AUG 1 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM PDT FOR
RIVERSIDE AND EAST CENTRAL ORANGE COUNTIES...
At 500 PM PDT, Thunderstorms have weakened across the warned area,
but runoff from earlier heavy rainfall is expected to continue.
Therefore the flash flood warning remains in place through 645 PM.
Some locations that will likely experience flooding include...
Riverside, Moreno Valley, Lake Elsinore, Perris, San Jacinto, March
Airforce Base, Menifee, Sun City, Woodcrest, Temescal Valley, Lake
Mathews and Ortega Highway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
&&
LAT...LON 3395 11704 3383 11697 3367 11716 3363 11741
3373 11758 3389 11744 3397 11726
$$
Albright669
WGUS76 KSGX 020138
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
638 PM PDT TUE AUG 1 2017
CAC059-065-020148-
/O.EXP.KSGX.FF.W.0010.000000T0000Z-170802T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-Orange CA-
638 PM PDT TUE AUG 1 2017
...THE FLASH FLOOD WARNING FOR RIVERSIDE AND EAST CENTRAL ORANGE
COUNTIES WILL EXPIRE AT 645 PM PDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3395 11704 3383 11697 3367 11716 3363 11741
3373 11758 3389 11744 3397 11726
$$
AlbrightThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 12:56 PM PDT | Flash Flood Watch | SGX | Orange, Riverside, San Bernardino, San Diego | 54 hr |
| Aug 1, 1:18 PM PDT | Areal Flood Advisory | SGX | San Diego | 3 hr |
| Aug 1, 1:26 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 64 min |
| Aug 1, 1:27 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 1, 2:52 PM PDT | Areal Flood Advisory | SGX | Orange, Riverside, San Diego | 3 hr |
| Aug 1, 3:01 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 59 min |
| Aug 1, 3:23 PM PDT | Severe Thunderstorm Warning | SGX | Orange, Riverside | 52 min |
| Aug 1, 3:57 PM PDT | Severe Thunderstorm Warning | SGX | Orange, Riverside | 45 min |
| Aug 1, 4:00 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 45 min |
| Aug 1, 4:17 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino | 3 hr |
| Aug 1, 4:36 PM PDT | Special Weather Statement | SGX | Orange | 39 min |
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.