Alert archive / Nevada / Flash Flood Warnings in 2018
Flash Flood Warning 7, NWS Reno, NV
NWS Reno, NV issued this flash flood warning at Jul 21, 2018, 2:41 PM PDT for Douglas County, Nevada; Mono County, California. It was in force for 5 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
- Jul 21, 2018, 2:41 PM PDT (21:41 UTC)
- Expired
- Jul 21, 2018, 7:21 PM PDT
- In force
- 5 hr
- Issued by
- NWS Reno, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mono County, CA, Douglas County, NV
The radar
The Reno radar (KRGX), 122 km from the middle of the area, began a volume at 21:42 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 |
|---|---|---|---|
| Jul 21, 3:00 PM PDT | FLASH FLOOD | 6 S Holbrook Junction, CA | CALIFORNIA HIGHWAY PATROL REPORTED A FLASH FLOOD CROSSING THE ROAD WITH TREES AND BOULDERS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Reno, NV (KREV), launched 12:00Z, 9.7 hours before the alert went out and 155 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
- 2299 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
981 WGUS55 KREV 212141 FFWREV CAC051-NVC005-212345- /O.NEW.KREV.FF.W.0007.180721T2141Z-180721T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Reno NV 241 PM PDT SAT JUL 21 2018 The National Weather Service in Reno has issued a * Flash Flood Warning for... Northern Mono County in northern California... Douglas County in western Nevada... * Until 445 PM PDT. * At 239 PM PDT, Doppler radar indicated thunderstorms producing heavy rain along Highway 89 and the Slinkard burn scar. Flash flooding and debris flows have an enhanced probability of occurring. * Some locations that will experience flooding include... Highways 89 and 395 near the Slinkard burn scar. Excessive rainfall over the Slinkard Burn scar will result in debris flow. The debris flow can consist of rock, mud, vegetation and other loose materials. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3866 11961 3871 11958 3868 11953 3860 11952 $$ Brong
3 follow-up statements
988 WGUS75 KREV 212221 FFSREV Flash Flood Statement National Weather Service Reno NV 321 PM PDT SAT JUL 21 2018 CAC051-NVC005-212345- /O.CON.KREV.FF.W.0007.000000T0000Z-180721T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Mono CA-Douglas NV- 321 PM PDT SAT JUL 21 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR NORTHERN MONO AND DOUGLAS COUNTIES... At 318 PM PDT, local law enforcement reported debris flow over Highway 89 in the Slinkard burn scar. Boulders and trees are blocking the road. Rainfall has diminished over the burn scar, but additional thunderstorms are possible through this afternoon. Some locations that will experience flooding include... Highway 89 in the Slinkard burn scar. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3866 11961 3871 11958 3868 11953 3860 11952 $$ Brong
719 WGUS55 KREV 212319 FFWREV CAC051-NVC005-220245- /O.EXT.KREV.FF.W.0007.000000T0000Z-180722T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Reno NV 419 PM PDT SAT JUL 21 2018 The National Weather Service in Reno has extended the * Flash Flood Warning for... Northern Mono County in northern California... Douglas County in western Nevada... * Until 745 PM PDT. * At 415 PM PDT, additional thunderstorms producing heavy rain are moving north toward the Slinkard Fire burn scar. The burn scar has already produced a debris flow that pushed trees and boulders across Highway 89. * Some locations that will experience flooding include... Topaz Lake and Junction U.S 395 And CA 89. Excessive rainfall over the Slinkard Fire burn scar will result in debris flows moving toward Highways 395 and 89. Debris flows can consist of rock, mud, vegetation and other loose materials. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3866 11961 3871 11958 3868 11953 3860 11952 $$
907 WGUS75 KREV 220221 FFSREV Flash Flood Statement National Weather Service Reno NV 721 PM PDT SAT JUL 21 2018 CAC051-NVC005-220229- /O.CAN.KREV.FF.W.0007.000000T0000Z-180722T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Mono CA-Douglas NV- 721 PM PDT SAT JUL 21 2018 ...THE FLASH FLOOD WARNING FOR NORTHERN MONO AND DOUGLAS COUNTIES IS CANCELLED... The heavy rain has ended. Flooding is no longer expected to pose a threat. Highway 89 near Monitor Pass remains closed due to an earlier debris flow. Please continue to heed any remaining road closures. LAT...LON 3866 11961 3871 11958 3868 11953 3860 11952 $$
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 12:30 PM PDT | Special Weather Statement | REV | Douglas, Lyon, Storey | 3 hr |
| Jul 21, 1:47 PM PDT | Areal Flood Advisory | REV | Douglas | 48 hr |
| Jul 21, 3:29 PM PDT | Areal Flood Advisory | REV | Storey, Washoe | 2 hr |
| Jul 21, 3:32 PM PDT | Areal Flood Advisory | REV | Lyon | 3 hr |
| Jul 21, 3:44 PM PDT | Special Weather Statement | REV | 31 min | |
| Jul 21, 3:50 PM PDT | Flash Flood Warning | REV | Storey, Washoe | 4 hr |
| Jul 21, 4:08 PM PDT | Special Weather Statement | REV | Douglas | 52 min |
| Jul 21, 4:57 PM PDT | Flash Flood Warning | REV | Washoe | 2 hr |
Nearby
Flash Flood Warnings in Nevada, 2018Flash Flood Warnings in California, 2018Every flash flood warning in 2018
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.