Alert archive / Nevada / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 9, NWS Elko, NV

May 17, 2018Elko County, Nevada

NWS Elko, NV issued this severe thunderstorm warning at May 17, 2018, 2:44 PM PDT for Elko County, Nevada. It was in force for 61 min. 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: May 17, 2018, 2:44 PM PDT (21:44 UTC)
Expired: May 17, 2018, 3:45 PM PDT
In force: 61 min
Issued by: NWS Elko, NV
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Elko County, NV

What was reported inside it

Time	Report	Where	Remark
May 17, 3:15 PM PDT	HAIL 0.88	10 Nw Elko, NV	SIGNIFICANT HAIL ACCUMULATION ON THE ROAD. HAIL SIZE ESTIMATED. THE HAIL WAS MOST LIKELY LARGER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Elko, NV (KLKN), launched 12:00Z, 9.7 hours before the alert went out and 142 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1 J/kg
Mixed-layer CIN: -218 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

326 
WUUS55 KLKN 172144
SVRLKN
NVC007-172245-
/O.NEW.KLKN.SV.W.0009.180517T2144Z-180517T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Elko NV
244 PM PDT THU MAY 17 2018

The National Weather Service in Elko Nevada has issued a

* Severe Thunderstorm Warning for...
  Southwestern Elko County in northeastern Nevada...

* Until 345 PM PDT

* At 243 PM PDT, a severe thunderstorm was located 9 miles northwest
  of Elko, and is nearly stationary.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Elko, Adobe Summit and Lamoille Summit. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4103 11597 4101 11573 4074 11570 4077 11607
TIME...MOT...LOC 2143Z 007DEG 4KT 4095 11587 

HAIL...1.00IN
WIND...60MPH
 
$$

JRM

2 follow-up statements

013 
WWUS55 KLKN 172213
SVSLKN

Severe Weather Statement
National Weather Service Elko NV
313 PM PDT THU MAY 17 2018

NVC007-172245-
/O.CON.KLKN.SV.W.0009.000000T0000Z-180517T2245Z/
Elko NV-
313 PM PDT THU MAY 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM PDT
FOR SOUTHWESTERN ELKO COUNTY...

At 313 PM PDT, a severe thunderstorm was located 8 miles northwest of
Elko, and is nearly stationary.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Elko, Adobe Summit and Lamoille Summit. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4100 11595 4098 11573 4074 11570 4078 11593
TIME...MOT...LOC 2213Z 007DEG 4KT 4092 11588 

HAIL...<.75IN
WIND...60MPH
 
$$

JRM

040 
WWUS55 KLKN 172235
SVSLKN

Severe Weather Statement
National Weather Service Elko NV
335 PM PDT THU MAY 17 2018

NVC007-172245-
/O.EXP.KLKN.SV.W.0009.000000T0000Z-180517T2245Z/
Elko NV-
335 PM PDT THU MAY 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ELKO COUNTY WILL
EXPIRE AT 345 PM PDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However small hail,
gusty winds and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Elko Nevada.

LAT...LON 4100 11595 4098 11573 4074 11570 4078 11593
TIME...MOT...LOC 2235Z 007DEG 4KT 4090 11588 

$$

JRM

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Elko, NV wrote its last area forecast discussion before this severe thunderstorm warning went out at May 17, 1:53 AM PDT, 12 hours 51 minutes earlier.

Area forecast discussion, May 17, 1:53 AM PDT, 12 hours 51 minutes before

Area Forecast Discussion
National Weather Service Elko NV
153 AM PDT Thu May 17 2018

.SYNOPSIS...Unsettled weather will continue across the Great Basin
region through Memorial Day. A low pressure system will continue
to move through the Silver State today. Showers and thunderstorms
will pop up again and some storms could produce small marble-
sized hail. The strongest storms today are expected to occur
across Eureka County and Elko County.

&&

.SHORT TERM...Today through Friday. KLRX WSR-88D radar is still
down for repairs. Satellite imagery shows substantial clearing
across central Nevada this morning and some convergence over the
northwest part of the LKN CWFA. There are lingering lightning
strikes in a line of showers stretching from Pershing County
through northwestern Elko County at this time. Model agreement is
pretty good moving this trough through Nevada and into Utah.

A closed low pressure circulation will move through central
Nevada today and dissolve into an open trough. With the axis of
the trough slowly moving east across eastern Nevada today, storms
will redevelop, with the strongest storms expected to occur from
Grass Valley near Eureka through Mountain City in northwest Elko
County this afternoon, including the stretch from Battle Mountain
to Wells. The main threat will be gusty outflow winds, brief heavy
downpours, and small marble-sized hail. High temperatures will be
in the 60s. Low temperatures will range from the mid 30s to the
mid 40s.

.LONG TERM...Friday night through next Wednesday.

Showers will be ending Friday night. Shower coverage continues to
look to lighten some on Saturday, but is short lived as the next
system quickly begins to develop off of the coast on Sunday. This
will keep showers and afternoon thunderstorms, possibly strong at
times, probable through at least the middle of next week as the
system slowly moves through the Great Basin. Temperatures will be
near normal, with high temperatures ranging from the mid 60s to
the mid 70s. Low temperatures may be a bit cooler Friday night
with some better clearing expected, with some valleys dropping
into the 30's. Otherwise, lows will be mainly in the 40's for the
remainder of the long term period with more clouds expected.

&&

.AVIATION...Thunderstorms will redevelop this afternoon and
evening across northern and central Nevada. Strongest storms look
to effect KEKO, KBAM, and possibly KWMC, with erratic wind gusts
to around 50 mph and small hail. Lower confidence that storms will
develop near KELY, but still a possibility. KTPH will remain dry
and breezy.

&&

.LKN WATCHES/WARNINGS/ADVISORIES...
None.
&&

92/90/90

Hazardous weather outlook, May 17, 2:21 AM PDT, 12 hours 23 minutes before

Hazardous Weather Outlook
National Weather Service Elko NV
221 AM PDT Thu May 17 2018

NVZ030-031-033>041-180930-
Humboldt County-Northern Elko County-Southeastern Elko County-
Ruby Mountains/East Humboldt Range-White Pine County-
Northern Lander County and Northern Eureka County-
Southern Lander County and Southern Eureka County-
Southwestern Elko County-South Central Elko County-
Northwestern Nye County-Northeastern Nye County-
221 AM PDT Thu May 17 2018

This hazardous weather outlook is for portions of Nevada...north
central Nevada...northeast Nevada...northwest Nevada and south
central Nevada.

.DAY ONE...Today and Tonight.

Low pressure will be moving through the state today producing more
showers and thunderstorms. The strongest storms should be in a
swath stretching from Grass Valley near Eureka to Mountain City in
Elko County, including Carlin and Elko. Some of the storms could
produce frequent lightning, brief heavy showers and small marble-
sized hail as well as gusty outflow winds.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The unsettled weather pattern will continue through the middle of
next week.

.SPOTTER INFORMATION STATEMENT...

Spotters are asked to report precipitation totals and any
significant weather phenomena such as strong winds or hail and
any storm damage.

LW

In the hours before

Special weather statement, May 17, 1:32 PM PDT, 1 hour 12 minutes before

Special Weather Statement
National Weather Service Elko NV
132 PM PDT THU MAY 17 2018

NVZ031-172100-
Northern Elko County-
132 PM PDT THU MAY 17 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN ELKO COUNTY...

At 131 PM PDT, a strong thunderstorm was located 22 miles east of
Jackpot. the storm is nearly stationary.

Winds in excess of 30 mph, pea size hail and brief heavy rainfall
are possible with this storm.

This storm will remain over mainly rural areas of northeastern
Northern Elko County County.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4184 11404 4183 11408 4198 11420 4200 11417
      4199 11404
TIME...MOT...LOC 2031Z 095DEG 1KT 4186 11427

DLW

Special weather statement, May 17, 1:48 PM PDT, 56 minutes before

Special Weather Statement
National Weather Service Elko NV
148 PM PDT THU MAY 17 2018

NVZ034-038-172130-
Southwest Elko County-Ruby Mountains and East Humboldt Range-
148 PM PDT THU MAY 17 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL ELKO COUNTY...

At 147 PM PDT, a strong thunderstorm was located over Spring Creek.
the storm is nearly stationary.

Wind gusts up to 50 mph and half inch hail are possible with this
storm. Significant accumulating hail is possible with this storm.
Hail will cover roadways and they will become slick. Slow down when
encountering hail covered roads .

Locations impacted include...
Lamoille, Jiggs, South Fork, Spring Creek, Lee, Lamoille Summit and
Lamoille Canyon.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4084 11523 4036 11550 4043 11586 4075 11577
      4092 11560
TIME...MOT...LOC 2047Z 094DEG 3KT 4075 11564

JRM

Special weather statement, May 17, 1:59 PM PDT, 45 minutes before

Special Weather Statement
National Weather Service Elko NV
159 PM PDT THU MAY 17 2018

NVZ031-034-038-039-172145-
Southwest Elko County-Northern Elko County-South Central Elko
County-Ruby Mountains and East Humboldt Range-
159 PM PDT THU MAY 17 2018

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL ELKO COUNTY...

At 158 PM PDT, strong thunderstorms were clustered near Elko. These
storms are nearly stationary.

Winds in excess of 30 mph and half inch hail are possible with this
storm. Heavy rainfall is also possible reducing visibility and
creating slick roadways.

Locations impacted include...
Elko, Wells, Deeth, Ryndon, Angel Lake, Adobe Summit, Hd Summit, Moor
Summit, Star Valley and Halleck.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4166 11472 4105 11460 4089 11546 4092 11560
      4075 11577 4074 11597 4121 11598
TIME...MOT...LOC 2058Z 095DEG 1KT 4090 11575

DLW

The office that day

Everything else NWS Elko, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 16, 5:59 PM PDT	Special Weather Statement	LKN		46 min
May 16, 6:00 PM PDT	Special Weather Statement	LKN		45 min
May 16, 6:56 PM PDT	Special Weather Statement	LKN	Lander	49 min
May 16, 8:01 PM PDT	Special Weather Statement	LKN		44 min
May 17, 1:32 PM PDT	Special Weather Statement	LKN		28 min
May 17, 1:48 PM PDT	Special Weather Statement	LKN		42 min
May 17, 1:57 PM PDT	Severe Thunderstorm Warning	LKN	Elko	63 min
May 17, 1:59 PM PDT	Special Weather Statement	LKN	Elko	46 min
May 17, 2:06 PM PDT	Severe Thunderstorm Warning	LKN	Elko	24 min
May 17, 2:13 PM PDT	Areal Flood Advisory	LKN	Elko	6 hr
May 17, 2:31 PM PDT	Severe Thunderstorm Warning	LKN	Elko	44 min
May 17, 2:53 PM PDT	Special Weather Statement	LKN		37 min
May 17, 2:59 PM PDT	Areal Flood Advisory	LKN	Elko	116 min
May 17, 3:09 PM PDT	Areal Flood Advisory	LKN	Elko	3 hr
May 17, 3:11 PM PDT	Flash Flood Warning	LKN	Elko	3 hr
May 17, 3:17 PM PDT	Severe Thunderstorm Warning	LKN	Elko	28 min
May 17, 3:19 PM PDT	Special Weather Statement	LKN		56 min
May 17, 3:38 PM PDT	Special Weather Statement	LKN		22 min

Nearby

Severe Thunderstorm Warnings in Nevada, 2018 Every severe thunderstorm 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.