Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 112, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 8, 2017, 3:38 PM PDT for Inyo 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
- Sep 8, 2017, 3:38 PM PDT (22:38 UTC)
- Expired
- Sep 8, 2017, 6:30 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Inyo County, CA
The radar
The Las Vegas radar (KESX), 134 km from the middle of the area, began a volume at 22:42 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 |
|---|---|---|---|
| Sep 8, 4:36 PM PDT | FLASH FLOOD | 7 S Shoshone, CA | CHP REPORTS ROADWAY FLOODING ON SR 127 AT OLD SPANISH TRAIL HIGHWAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.6 hours before the alert went out and 83 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
- 176 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 2615 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
110 WGUS55 KVEF 082238 FFWVEF CAC027-090130- /O.NEW.KVEF.FF.W.0112.170908T2238Z-170909T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Las Vegas NV 338 PM PDT FRI SEP 8 2017 The National Weather Service in Las Vegas has issued a * Flash Flood Warning for... Southeastern Inyo County in south central California... * Until 630 PM PDT * At 336 PM PDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Shoshone, Highway 127, Jubilee Pass Road and Tecopa. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. && LAT...LON 3579 11649 3627 11647 3628 11628 3579 11593 $$ JS
2 follow-up statements
160 WGUS75 KVEF 090013 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 513 PM PDT FRI SEP 8 2017 CAC027-090130- /O.CON.KVEF.FF.W.0112.000000T0000Z-170909T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Inyo CA- 513 PM PDT FRI SEP 8 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR SOUTHEASTERN INYO COUNTY... At 509 PM PDT, Doppler radar indicated thunderstorms weakening across the warned area. However, the California Highway Patrol reported flash flooding occurring along Sr 127. Motorists use caution! Some locations that will experience flooding include... Sr 127 and other secondary roadways. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. && LAT...LON 3579 11649 3627 11647 3628 11628 3579 11593 $$ JS
083 WGUS75 KVEF 090123 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 623 PM PDT FRI SEP 8 2017 CAC027-090132- /O.EXP.KVEF.FF.W.0112.000000T0000Z-170909T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Inyo CA- 623 PM PDT FRI SEP 8 2017 ...THE FLASH FLOOD WARNING FOR SOUTHEASTERN INYO COUNTY WILL EXPIRE AT 630 PM PDT... The heavy rain has ended. Flooding is no longer expected to pose a threat. However, storms continue to develop over northeast San Bernardino County and are moving north. Please continue to heed any remaining road closures. LAT...LON 3579 11649 3627 11647 3628 11628 3579 11593 $$ JS
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 3:43 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Sep 8, 12:18 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 12:29 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 8, 1:24 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Sep 8, 3:22 PM PDT | Flash Flood Warning | VEF | San Bernardino | 6 hr |
| Sep 8, 4:02 PM PDT | Flash Flood Warning | VEF | San Bernardino | 4 hr |
| Sep 8, 4:25 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 50 min |
| Sep 8, 4:51 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 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.