Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 21, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Sep 7, 2017, 5:01 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
- Sep 7, 2017, 5:01 PM PDT (00:01 UTC)
- Expired
- Sep 7, 2017, 8:00 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), 80 km from the middle of the area, began a volume at 00:04 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 00:00Z, 0.0 hours before the alert went out and 100 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2418 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
266 WGUS56 KSGX 080001 FFWSGX CAC073-080300- /O.NEW.KSGX.FF.W.0021.170908T0001Z-170908T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service San Diego CA 501 PM PDT THU SEP 7 2017 The National Weather Service in San Diego has issued a * Flash Flood Warning for... Northeastern San Diego County in southwestern California... * Until 800 PM PDT * At 456 PM PDT, Doppler radar indicated thunderstorms producing heavy rain 5 to 10 miles northwest of Borrego Springs. Flash flooding will likely begin shortly, including in canyons just west and northwest of Borrego Springs. Flash flooding will be possible in or close to Borrego Springs as water from canyons drains locally into the desert. * Some locations that will likely experience flooding include... Borrego Springs, Hwy 78 Between Borrego Springs Rd And Ocotillo Wells, Hwy S22 Between Ranchita And Borrego Springs, Borrego Palm Canyon, Hwy S22 Between Borrego Springs And Imperial County Line and Los Coyotes Indian Reservation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to higher ground now. Act quickly to protect your life. && LAT...LON 3342 11616 3316 11620 3320 11657 3342 11658 $$ Maxwell
2 follow-up statements
823 WGUS76 KSGX 080024 FFSSGX Flash Flood Statement National Weather Service San Diego CA 524 PM PDT THU SEP 7 2017 CAC073-080300- /O.CON.KSGX.FF.W.0021.000000T0000Z-170908T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Diego CA- 524 PM PDT THU SEP 7 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM PDT FOR NORTHEASTERN SAN DIEGO COUNTY... At 522 PM PDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. The threat of flash flooding is now greatest 5 to 10 miles east of Borrego Springs along Highway S-22 where a severe thunderstorm is occurring. Canyons northwest of Borrego Springs could continue to have flooding through about 600 PM. Some locations that will likely experience flooding include... Borrego Springs, Hwy 78 Between Borrego Springs Rd And Ocotillo Wells, Hwy S22 Between Ranchita And Borrego Springs, Borrego Palm Canyon, Hwy S22 Between Borrego Springs And Imperial County Line and Los Coyotes Indian Reservation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to higher ground now. Act quickly to protect your life. && LAT...LON 3342 11616 3316 11620 3320 11657 3342 11658 $$ Maxwell
787 WGUS76 KSGX 080204 FFSSGX Flash Flood Statement National Weather Service San Diego CA 704 PM PDT THU SEP 7 2017 CAC073-080213- /O.CAN.KSGX.FF.W.0021.000000T0000Z-170908T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Diego CA- 704 PM PDT THU SEP 7 2017 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN SAN DIEGO COUNTY IS CANCELLED... The heavy rain has ended. Flooding is no longer expected to pose a threat. Normally dry washes which filled up with water will recede quickly this evening. LAT...LON 3342 11616 3316 11620 3320 11657 3342 11658 $$ Maxwell
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 5:22 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 53 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.