Alert archive / Nevada / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 40, NWS Las Vegas, NV

July 1, 2016Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 1, 2016, 11:15 PM PDT for Clark County, Nevada. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 1, 2016, 11:15 PM PDT (06:15 UTC)
Expired: Jul 2, 2016, 12:15 AM PDT
In force: 60 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon

County Clark County, NV

The radar

The Las Vegas radar (KESX), 70 km from the middle of the area, began a volume at 06:17 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.

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

Las Vegas, NV (KVEF), launched 00:00Z, 6.3 hours before the alert went out and 30 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: 998 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 2623 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

172 
WUUS55 KVEF 020615
SVRVEF
NVC003-020715-
/O.NEW.KVEF.SV.W.0040.160702T0615Z-160702T0715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1115 PM PDT FRI JUL 1 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CLARK COUNTY IN SOUTHERN NEVADA...

* UNTIL 1215 AM PDT

* AT 1114 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED NEAR ALIANTE...AND MOVING EAST AT 20 MPH.

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  NELLIS AFB AND EAST LAS VEGAS AROUND 1135 PM PDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
FRENCHMAN MTN...STRATOSPHERE TOWER...THE LAKES...UNLV...SUNRISE MTN
AND GASS PK.

THIS INCLUDES INTERSTATE 15 IN NEVADA BETWEEN MILE MARKERS 60 AND 61.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM WILL PRODUCE HIGH WINDS WHICH CAN BRING DOWN TREES AND
POWER LINES AND CAUSE BLOWING DUST. ALSO...LIGHTNING CAN KILL! TAKE
COVER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS UNTIL THE STORM
PASSES. REPORT SEVERE WEATHER TO THE LAS VEGAS NATIONAL WEATHER
SERVICE VIA FACEBOOK OR TWITTER.

&&

LAT...LON 3629 11550 3656 11502 3620 11485 3599 11529
TIME...MOT...LOC 0614Z 286DEG 16KT 3637 11514 

$$

BP

2 follow-up statements

242 
WWUS55 KVEF 020642
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1142 PM PDT FRI JUL 1 2016

NVC003-020715-
/O.CON.KVEF.SV.W.0040.000000T0000Z-160702T0715Z/
CLARK NV-
1142 PM PDT FRI JUL 1 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM PDT
FOR NORTHWESTERN CLARK COUNTY...

AT 1140 PM PDT...DOPPLER RADAR INDICATED THE SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH NEAR ALIANTE
HAS WEAKENED. HOWEVER...OTHER THUNDERSTORMS NORTHEAST OF LAS VEGAS
AND NEAR SAM BOYD STADIUM ARE CAPABLE OF PRODUCING DAMAGING WINDS. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
FRENCHMAN MTN...STRATOSPHERE TOWER...THE LAKES...UNLV...SUNRISE MTN
AND GASS PK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM WILL PRODUCE HIGH WINDS WHICH CAN BRING DOWN TREES AND
POWER LINES AND CAUSE BLOWING DUST. ALSO...LIGHTNING CAN KILL! TAKE
COVER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS UNTIL THE STORM
PASSES. REPORT SEVERE WEATHER TO THE LAS VEGAS NATIONAL WEATHER
SERVICE VIA FACEBOOK OR TWITTER.

&&

LAT...LON 3629 11550 3656 11502 3620 11485 3599 11529
TIME...MOT...LOC 0640Z 248DEG 19KT 3633 11520 

$$

BP

331 
WWUS55 KVEF 020708
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1208 AM PDT SAT JUL 2 2016

NVC003-020718-
/O.EXP.KVEF.SV.W.0040.000000T0000Z-160702T0715Z/
CLARK NV-
1208 AM PDT SAT JUL 2 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CLARK COUNTY WILL
EXPIRE AT 1215 AM 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.

LAT...LON 3629 11550 3656 11502 3620 11485 3599 11529
TIME...MOT...LOC 0705Z 286DEG 16KT 3633 11520 

$$

BP

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 Las Vegas, NV wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 1, 2:49 PM PDT, 8 hours 26 minutes earlier.

Area forecast discussion, Jul 1, 2:49 PM PDT, 8 hours 26 minutes before

Area Forecast Discussion
National Weather Service Las Vegas NV
249 PM PDT FRI JUL 1 2016

.SYNOPSIS...Monsoonal moisture will linger over the region
through Saturday and fuel thunderstorms across the Mojave Desert
region...especially during the afternoon and evening. Drier air is
expected to work into the region Sunday bringing an end to
thunderstorms and a warming trend for the rest of the holiday
weekend and much of next week.
&&

.SHORT TERM...through Sunday night.

Confidence is increasing in the scenario of thunderstorms over
Central Nevada expanding and propagating southward with associated
widespread gusty winds blasting into southern Nevada and northwest
Arizona this evening between 8 PM and midnight. Thunderstorms will
likely persist after midnight as they move south toward Laughlin-
Bullhead City, Needles Lake Havasu and Kingman. The HRRR model has
been indicating this trend for the past several runs and it makes
sense given the latest developments. North-south steering flow will
push storms into a high CAPE environment after nearly full heating
this afternoon.

The circulation over central California, which was enhancing the
convection over central Nevada, is forecast to dig toward Point
Conception Saturday afternoon which will increase a dry southwest
mid level flow across the region. However...the moist layer below
700 mb will be a little slow to exit and should provide fuel for
isolated to scattered thunderstorms across southern Nevada and
northwest Arizona Saturday before the dry air invading from the
southwest finally dominates and brings thunderstorm chances to an
end by Sunday.

.LONG TERM...Monday through Friday.

A dry pattern is still expected for our forecast area much of next
week due to persistent dry southwest flow due to a broad weak trough
over the Pacific Northwest which will shunt the closed mid level
high over Texas and northern Mexico.
&&

.AVIATION...For McCarran...It is looking likely that thunderstorms
pushing down from south central Nevada will impact the Las Vegas
Valley with strong northwest-north winds between 8 PM and 11 PM PDT
this evening. Potential air traffic impacts are substantial, with
chances of convection at the terminal and in the flight corridors.
Thunderstorms will move to the south after midnight and continue to
impact the Peach Springs corridor. A chance of thunderstorms exists
again Saturday for the mountains around the Las Vegas Valley but
confidence is low that it will impact the terminal.

For the rest of southern Nevada...northwest Arizona...and southeast
California...Scattered showers and thunderstorms will impact most of
the region this afternoon and evening. Most of the other storm
development is expected this afternoon over central Nevada then a
large complex of thunderstorms will push down through southern
Nevada and northwest Arizona between 02Z and 10Z. Gusty outflow
winds are likely with this complex late this afternoon and evening.
Lower cigs near storms are also possible. Thunderstorms will
dissipate overnight as the move past Kingman and Lake Havasu.
Isolated to scattered thunderstorms will still be possible across
southern Nevada and northwest Arizona Saturday afternoon and evening.
&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather according to standard operating procedures.
Strong thunderstorms winds will be possible across southern Nevada
and northwest Arizona later this evening through early Saturday
morning. Flash flooding will also be a concern with any
thunderstorms especially across Mohave, Clark, and San Bernardino
Counties.
&&

Short Term/Long Term/Aviation...Adair

For more forecast information...see us on our webpage:

http://weather.gov/lasvegas or follow us on Facebook and Twitter

In the hours before

Local storm report, Jul 1, 7:43 PM PDT, 3 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
743 PM PDT FRI JUL 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 AM     FLASH FLOOD      8 NE SHOSHONE           36.06N 116.19W
07/01/2016                   INYO               CA   LAW ENFORCEMENT

            CALIFORNIA HIGHWAY PATROL REPORTS THE
            CLOSURE OF STATE HIGHWAY 178 FROM THE NEVADA
            STATE LINE TO SHOSHONE AND STATE HIGHWAY 172
            FROM SHOSHONE TO DEATH VALLEY JUNCTION OWING
            TO FLASH FLOODING. TIME OF ONSET
            APPROXIMATED FROM RADAR.

&&

CMS

Local storm report, Jul 1, 8:11 PM PDT, 3 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
811 PM PDT FRI JUL 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0755 PM     FLASH FLOOD      1 WSW CALIENTE          37.61N 114.53W
07/01/2016                   LINCOLN            NV   LAW ENFORCEMENT

            LINCOLN COUNTY SHERIFF REPORTED THE CLOSURE
            OF STATE HIGHWAY 317 SOUTH OF CALIENTE OWING
            TO FLASH FLOODING.

&&

CMS

Local storm report, Jul 1, 9:17 PM PDT, 1 hour 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
917 PM PDT FRI JUL 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 PM     TSTM WND GST     19 N MERCURY            36.94N 116.04W
07/01/2016  M58 MPH          NYE                NV   MESONET

            MESONET STATION NNSS - A06 /A06AE/.

&&

CMS

Local storm report, Jul 1, 10:03 PM PDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1003 PM PDT FRI JUL 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0906 PM     NON-TSTM WND GST 3 SSW MERCURY           36.62N 116.02W
07/01/2016  M68 MPH          NYE                NV   ASOS

            ASOS STATION DESERT ROCK AIRPORT /DRA/.

&&

CMS

Local storm report, Jul 1, 10:11 PM PDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE LAS VEGAS NV
1011 PM PDT FRI JUL 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0906 PM     TSTM WND GST     3 SSW MERCURY           36.62N 116.02W
07/01/2016  M68 MPH          NYE                NV   ASOS

            ASOS STATION DESERT ROCK AIRPORT /DRA/.

&&

CMS

Local storm report, Jul 1, 10:55 PM PDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE LAS VEGAS NV
1055 PM PDT FRI JUL 1 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1030 PM     TSTM WND GST     1 NW PAHRUMP            36.22N 116.00W
07/01/2016  E60 MPH          NYE                NV   TRAINED SPOTTER

            BLOWING DUST ALSO REPORTED.

&&

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 6:20 PM PDT	Flash Flood Warning	VEF	Lincoln	6 hr
Jul 1, 7:52 PM PDT	Flash Flood Warning	VEF	Lincoln	3 hr
Jul 1, 8:27 PM PDT	Severe Thunderstorm Warning	VEF	Clark	63 min
Jul 1, 8:50 PM PDT	Severe Thunderstorm Warning	VEF	Clark	55 min
Jul 1, 9:18 PM PDT	Severe Thunderstorm Warning	VEF	Clark, Nye	57 min
Jul 1, 9:22 PM PDT	Areal Flood Advisory	VEF	Clark	3 hr
Jul 1, 9:38 PM PDT	Severe Thunderstorm Warning	VEF	Clark	37 min
Jul 1, 10:14 PM PDT	Severe Thunderstorm Warning	VEF	Clark	46 min
Jul 1, 10:20 PM PDT	Severe Thunderstorm Warning	VEF	Clark	40 min
Jul 1, 10:20 PM PDT	Severe Thunderstorm Warning	VEF	Nye	25 min
Jul 1, 10:45 PM PDT	Severe Thunderstorm Warning	VEF	Clark, Nye	30 min
Jul 1, 11:28 PM PDT	Areal Flood Advisory	VEF	Clark	3 hr
Jul 1, 11:45 PM PDT	Flash Flood Warning	VEF	Clark, Nye	3 hr
Jul 2, 12:13 AM PDT	Areal Flood Advisory	VEF	Clark	2 hr
Jul 2, 12:57 AM PDT	Areal Flood Advisory	VEF	Clark	3 hr
Jul 2, 1:26 AM PDT	Severe Thunderstorm Warning	VEF	Clark	49 min
Jul 2, 3:45 PM PDT	Severe Thunderstorm Warning	VEF	Clark	60 min
Jul 2, 3:56 PM PDT	Areal Flood Advisory	VEF	Clark	3 hr

Nearby

Severe Thunderstorm Warnings in Nevada, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.