Alert archive / Nevada / Flash Flood Warnings in 2017
Flash Flood Warning 3, NWS Elko, NV
NWS Elko, NV issued this flash flood warning at Feb 8, 2017, 12:35 PM PST for Elko County, Nevada. It was in force for 5 hr. 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
- Feb 8, 2017, 12:35 PM PST (20:35 UTC)
- Expired
- Feb 8, 2017, 6:00 PM PST
- In force
- 5 hr
- Issued by
- NWS Elko, NV
- Area
- Storm-based polygon
- Flood severity
- Unknown
County Elko County, NV
The radar
The Salt Lake City radar (KMTX), 155 km from the middle of the area, began a volume at 20:34 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 |
|---|---|---|---|
| Feb 8, 1:06 PM PST | FLASH FLOOD | 21 Nnw Montello, NV | TIME IS ESTIMATED. COMPLETE BREACH AND FAILURE OF THE TWENTYONE MILE DAM NW OF MONTELLO. THOUSAND SPRINGS CREEK WAS FLOODED. RANCHES WERE FLOODED WITH IMPACTS TO THE GAMBLE RANCH. LAW ENFORCEMENT EVACUATED RESIDENTS DOWNSTREAM OF THE DAM. RAIL TRAFFIC WAS CLOS |
| Feb 8, 3:00 PM PST | FLOOD | Montello, NV | TIME ESTIMATED WITH CURRENT FLOODING. SIGNIFICANT AND WIDESPREAD FLOODING OCCURRING IN MONTELLO. FLOOD WATERS POSSIBLY ENTERED HOMES AND THE US POST OFFICE. CREWS WERE ACTIVELY SANDBAGGING TO HELP WITH FLOODING. NUMEROUS AREAS WERE ALSO FLOODED AS THE CREEK FL |
| Feb 8, 4:01 PM PST | FLOOD | 20 Nnw Montello, NV | COUNTY ROUTE 765 CLOSED DUE TO WASHOUTS FROM THE DAM FAILURE AND THOUSAND SPRINGS CREEK. . |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Elko, NV (KLKN), launched 12:00Z, 8.6 hours before the alert went out and 59 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
- 1826 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- 259 m²/s²
- 0-3 km storm-relative helicity
- 325 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
388
WGUS55 KLKN 082035 CCA
FFWLKN
NVC007-090200-
/O.NEW.KLKN.FF.W.0003.170208T2035Z-170209T0200Z/
/00000.U.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Elko NV
1235 PM PST WED FEB 8 2017
The National Weather Service in Elko Nevada has issued a
* Flash Flood Warning for...
A Dam Break in...
East central Elko County in northeastern Nevada...
* Until 600 PM PST Wednesday
* At 1154 AM PST, local law enforcement reported the failure of
Twentyone Mile Dam. This is a breach of an earthen dam. Reports of
at least two to three feet of water is rapidly moving downstream.
The depth of water may increase as the dam continues to fail. Take
immediate action and move to higher ground. This is a dangerous
and life threatening situation. County road 765, Twentyone Mile
Ranch, Eighteen Mile Ranch are downstream of the dam and could see
dangerous flash flooding. Eventually Montello and State Route 233
could be impacted.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
&&
LAT...LON 4127 11434 4145 11452 4162 11447 4152 11404
4122 11404
$$
JRM/LW1 follow-up statement
332
WGUS75 KLKN 082121
FFSLKN
Flash Flood Statement
National Weather Service Elko NV
121 PM PST WED FEB 8 2017
NVC007-090200-
/O.CON.KLKN.FF.W.0003.000000T0000Z-170209T0200Z/
/00000.0.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Elko NV-
121 PM PST WED FEB 8 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM PST FOR
EAST CENTRAL ELKO COUNTY...
At 114 PM PST, local law enforcement reported the possible failure
of Twentyone and Twelve Mile Dam. This is a possible breach of an
earthen dam. Unconfirmed Reports of at least two to three feet of
water is rapidly moving downstream. Although uncertainty exists
about the breach, dangerous flash flooding is still occurring with
road washouts of County Road 765. The depth of water may increase if
the dam fails. Regardless, Take immediate action and move to higher
ground. This is a dangerous and life threatening situation. County
road 765 and 766, Twentyone Mile Ranch, Eighteen Mile Ranch are
downstream of the dam and could see dangerous flash flooding. There
is a confirmed report of an emergency stop of railroad traffic near
the Utah and Nevada border due to water over the tracks. Northern
sections of Montello and State Route 233 could eventually be
impacted.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
&&
LAT...LON 4127 11434 4145 11452 4162 11447 4152 11404
4122 11404
$$
JRM/LWThe office that day
Everything else NWS Elko, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 7, 6:24 PM PST | River Flood Warning | LKN | Elko | 7 days |
| Feb 7, 6:25 PM PST | Areal Flood Warning | LKN | Humboldt | 36 hr |
| Feb 7, 9:21 PM PST | River Flood Warning | LKN | Lander | 22 days |
| Feb 7, 9:40 PM PST | Flash Flood Warning | LKN | Lander | 8 hr |
| Feb 8, 5:30 AM PST | Areal Flood Warning | LKN | Lander | 12 hr |
| Feb 8, 12:00 PM PST | Flash Flood Warning | LKN | Elko | 12 hr |
Nearby
Flash Flood Warnings in Nevada, 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.