Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 9, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 1, 2017, 1:27 PM PDT for San Diego County, California. It was in force for 3 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
- Aug 1, 2017, 1:27 PM PDT (20:27 UTC)
- Expired
- Aug 1, 2017, 4:30 PM PDT
- In force
- 3 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Diego County, CA
The radar
The San Diego radar (KNKX), 26 km from the middle of the area, began a volume at 20:31 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, 8.5 hours before the alert went out and 42 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.
244 WGUS56 KSGX 012027 FFWSGX CAC073-012330- /O.NEW.KSGX.FF.W.0009.170801T2027Z-170801T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service San Diego CA 127 PM PDT TUE AUG 1 2017 The National Weather Service in San Diego has issued a * Flash Flood Warning for... Central San Diego County in southwestern California... * Until 430 PM PDT * At 127 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... Alpine, Barona Indian Reservation, Captain Grande Indian Reservation, Flinn Springs, Viejas Indian Reservation and Harbison Canyon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to higher ground now. Act quickly to protect your life. && LAT...LON 3296 11670 3281 11668 3281 11686 3299 11689 $$ Albright
2 follow-up statements
900 WGUS76 KSGX 012052 FFSSGX Flash Flood Statement National Weather Service San Diego CA 152 PM PDT TUE AUG 1 2017 CAC073-012330- /O.CON.KSGX.FF.W.0009.000000T0000Z-170801T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Diego CA- 152 PM PDT TUE AUG 1 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM PDT FOR CENTRAL SAN DIEGO COUNTY... At 149 PM PDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is likely ongoing or will begin shortly. Areas in the vicinity of Alpine are at the greatest risk of flash flooding, with doppler radar estimating up to 1.75 inches of rainfall over the last hour. Some locations that will likely experience flooding include... Alpine, Barona Indian Reservation, Captain Grande Indian Reservation, Flinn Springs, Viejas Indian Reservation and Harbison Canyon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to higher ground now. Act quickly to protect your life. && LAT...LON 3296 11670 3281 11668 3281 11686 3299 11689 $$ Albright
101 WGUS76 KSGX 012323 FFSSGX Flash Flood Statement National Weather Service San Diego CA 423 PM PDT TUE AUG 1 2017 CAC073-012333- /O.EXP.KSGX.FF.W.0009.000000T0000Z-170801T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Diego CA- 423 PM PDT TUE AUG 1 2017 ...THE FLASH FLOOD WARNING FOR CENTRAL SAN DIEGO COUNTY WILL EXPIRE AT 430 PM PDT... Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3296 11670 3281 11668 3281 11686 3299 11689 $$ Albright
The 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, 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, 3:42 PM PDT | Flash Flood Warning | SGX | Orange, Riverside | 3 hr |
| 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.