Alert archive / California / Flash Flood Warnings in 2016
Flash Flood Warning 9, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Apr 8, 2016, 5:41 PM PDT for San Bernardino County, California. It was in force for 109 min. 3 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
- Apr 8, 2016, 5:41 PM PDT (00:41 UTC)
- Expired
- Apr 8, 2016, 7:30 PM PDT
- In force
- 109 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Edwards AFB radar (KEYX), 52 km from the middle of the area, began a volume at 00:41 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 |
|---|---|---|---|
| Apr 8, 5:43 PM PDT | FLOOD | 6 Wnw Adelanto, CA | CHP REPORTED FLOODING ON EL MIRAGE ROAD. |
| Apr 8, 6:21 PM PDT | FLOOD | 8 W Helendale, CA | CHP REPORTED FLOODING ON HWY 395 NEAR SHADOW MOUNTAIN ROAD. VEHICLES ARE SPINNING OUT BECAUSE OF THE WATER ON THE ROADWAY. |
| Apr 8, 6:21 PM PDT | FLASH FLOOD | 8 W Helendale, CA | CHP REPORTED FLOODING ON HWY 395 NEAR SHADOW MOUNTAIN ROAD. VEHICLES ARE SPINNING OUT BECAUSE OF THE WATER ON THE ROADWAY. |
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, 0.7 hours before the alert went out and 207 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
- 29 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 488 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
566 WGUS56 KSGX 090041 FFWSGX CAC071-090230- /O.NEW.KSGX.FF.W.0009.160409T0041Z-160409T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 541 PM PDT FRI APR 8 2016 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 730 PM PDT * AT 537 PM PDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING WILL LIKELY BEGIN SHORTLY. * SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE... VICTORVILLE...ADELANTO...EL MIRAGE...PINON HILLS...PHELAN...ORO GRANDE AND HELENDALE. ROADS LIKELY TO BE IMPACTED INCLUDE HIGHWAYS 395...18...AND 66...AND INTERSTATE 15. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 3479 11716 3441 11746 3443 11766 3482 11767 $$ SS
2 follow-up statements
775 WGUS76 KSGX 090140 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 640 PM PDT FRI APR 8 2016 CAC071-090230- /O.CON.KSGX.FF.W.0009.000000T0000Z-160409T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 640 PM PDT FRI APR 8 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM PDT FOR SAN BERNARDINO COUNTY... AT 638 PM PDT...LOCAL LAW ENFORCEMENT REPORTED HEAVY RAIN AND FLOODING NEAR HELENDALE AND ADELANTO. SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE... VICTORVILLE...ADELANTO...EL MIRAGE...PINON HILLS...PHELAN...ORO GRANDE AND HELENDALE. FLOODING MAY IMPACT TRAVEL ALONG HIGHWAYS 395...18...AND 66. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 3479 11716 3441 11746 3443 11766 3482 11767 $$ SS
064 WGUS76 KSGX 090227 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 727 PM PDT FRI APR 8 2016 CAC071-090235- /O.EXP.KSGX.FF.W.0009.000000T0000Z-160409T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 727 PM PDT FRI APR 8 2016 ...THE FLASH FLOOD WARNING FOR SAN BERNARDINO COUNTY WILL EXPIRE AT 730 PM PDT... THE HEAVY RAIN HAS ENDED...AND FLASH FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. HOWEVER...ADDITIONAL RUNOFF FROM LIGHT PRECIPITATION OVER THE WARNED AREA MAY CAUSE MINOR ROADWAY FLOODING...ESPECIALLY NEAR LOW WATER CROSSINGS. LAT...LON 3479 11716 3441 11746 3443 11766 3482 11767 $$ SS
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 11:59 AM PDT | Flash Flood Watch | SGX | Orange, Riverside, San Bernardino, San Diego | 32 hr |
| Apr 9, 12:00 PM PDT | Beach Hazards Statement | SGX | Orange, San Diego | 23 hr |
Nearby
Flash Flood Warnings in California, 2016Every flash flood warning in 2016
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.