Alert archive / Nevada / Flash Flood Warnings in 2018
Flash Flood Warning 8, NWS Reno, NV
NWS Reno, NV issued this flash flood warning at Jul 21, 2018, 3:50 PM PDT for Storey County, Washoe County, Nevada. It was in force for 4 hr. 7 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
- Jul 21, 2018, 3:50 PM PDT (22:50 UTC)
- Expired
- Jul 21, 2018, 7:45 PM PDT
- In force
- 4 hr
- Issued by
- NWS Reno, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Storey County, NV, Washoe County, NV
The radar
The Reno radar (KRGX), 31 km from the middle of the area, began a volume at 22:53 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, 5:00 PM PDT | HEAVY RAIN 1.01 | Reno-Tahoe Intl Airport, NV | THE RENO-TAHOE INTL. AIRPORT ASOS MEASURED 1.01 INCHES OF HEAVY RAIN FROM THUNDERSTORMS WITHIN THE LAST TWO HOURS. |
| Jul 21, 5:00 PM PDT | HEAVY RAIN 1.29 | Reno-Tahoe Intl Airport, NV | CORRECTS PREVIOUS HEAVY RAIN REPORT FROM RENO-TAHOE INTL AIRPORT. THE RENO-TAHOE INTL. AIRPORT ASOS MEASURED 1.01 INCHES OF HEAVY RAIN FROM THUNDERSTORMS WITHIN THE LAST TWO HOURS. |
| Jul 21, 5:40 PM PDT | FLASH FLOOD | 1 Sse Sparks, NV | SPARKS POLICE DEPT. REPORTED HEAVY FLOODING NEAR THE INDUSTRIAL AREA IN SPARKS, NV DUE TO HEAVY RAINFALL FROM THUNDERSTORMS. |
| Jul 21, 6:50 PM PDT | HEAVY RAIN 2.43 | 4 Nnw Washoe City, NV | THE GALENA RAWS SENSOR MEASURED 2.43 INCHES OF HEAVY RAIN FROM THUNDERSTORMS IN THE LAST 3 HOURS. RADAR RAIN TOTAL ESTIMATES IN THIS AREA WERE IN THE 4.00-5.00 INCH RANGE. |
| Jul 21, 6:50 PM PDT | HEAVY RAIN 2.66 | 4 Nnw Washoe City, NV | CORRECTS PREVIOUS HEAVY RAIN REPORT FROM 4 NNW WASHOE CITY. THE GALENA RAWS SENSOR MEASURED 2.43 INCHES OF HEAVY RAIN FROM THUNDERSTORMS IN THE LAST 3 HOURS. RADAR RAIN TOTAL ESTIMATES IN THIS AREA WERE IN THE 4.00-5.00 INCH RANGE. |
| Jul 21, 6:56 PM PDT | HEAVY RAIN 1.3 | 5 N Washoe City, NV | MESONET STATION WCTN2, 5 N WASHOE CITY. |
| Jul 21, 7:15 PM PDT | HEAVY RAIN 0.99 | 5 Ne Washoe City, NV | MESONET STATION SCRN2, 5 NE WASHOE CITY. |
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, 10.8 hours before the alert went out and 127 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.
762 WGUS55 KREV 212250 FFWREV NVC029-031-220045- /O.NEW.KREV.FF.W.0008.180721T2250Z-180722T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Reno NV 350 PM PDT SAT JUL 21 2018 The National Weather Service in Reno has issued a * Flash Flood Warning for... Storey County in western Nevada... South central Washoe County in western Nevada... * Until 545 PM PDT. * At 349 PM PDT, Doppler radar indicated thunderstorms producing heavy rain over the Reno-Sparks area. Up to two inches of rain have already fallen. * Some locations that will experience flooding include... Reno, Sparks, Lockwood, Wingfield Springs, Spanish Springs, Reno-Tahoe International Airport, Mustang. PRECAUTIONARY/PREPAREDNESS ACTIONS... Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 3966 11959 3936 11959 3937 11984 3965 11982 $$ BB
2 follow-up statements
454 WGUS75 KREV 212326 FFSREV Flash Flood Statement National Weather Service Reno NV 426 PM PDT SAT JUL 21 2018 NVC029-031-220045- /O.CON.KREV.FF.W.0008.000000T0000Z-180722T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Storey NV-Washoe NV- 426 PM PDT SAT JUL 21 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT FOR STOREY AND SOUTH CENTRAL WASHOE COUNTIES... At 422 PM PDT, Heavy rain, hail and gusty winds to 50 mph will continue in the Reno-Sparks area, including the North Valleys, through 6 pm. Sparks Police have reported a debris flow at Vista and Loop. Rainfall is also causing ponding of water on many roads across the region. Some locations that will experience flooding include... Reno, Sparks, Lockwood, Wingfield Springs, Spanish Springs, Lemmon Valley-Golden Valley, Mustang, and Sun Valley. PRECAUTIONARY/PREPAREDNESS ACTIONS... Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 3966 11959 3936 11959 3937 11984 3965 11982 $$ Brong
686 WGUS55 KREV 220041 FFWREV NVC029-031-220245- /O.EXT.KREV.FF.W.0008.000000T0000Z-180722T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Reno NV 541 PM PDT SAT JUL 21 2018 The National Weather Service in Reno has extended the * Flash Flood Warning for... Storey County in western Nevada... South central Washoe County in western Nevada... * Until 745 PM PDT. * At 539 PM PDT, Doppler radar indicated thunderstorms with heavy rain continue to impact the south and west side of Reno. * Some locations that will experience flooding include... Reno, Sparks, Lockwood, Wingfield Springs, Damonte Ranch, Spanish Springs, Reno-Tahoe International Airport, Galena, Hidden Valley, Lemmon Valley-Golden Valley, Mustang, and Sun Valley. PRECAUTIONARY/PREPAREDNESS ACTIONS... Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 3966 11959 3936 11959 3937 11984 3965 11982 $$ Brong
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, 2:41 PM PDT | Flash Flood Warning | REV | Douglas | 5 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, 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, 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.