Alert archive / Arizona / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 50, NWS Las Vegas, NV

July 29, 2016Mohave County, Arizona; San Bernardino County, California

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 29, 2016, 11:41 PM MST for Mohave County, Arizona; San Bernardino County, California. It was in force for 71 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 29, 2016, 11:41 PM MST (06:41 UTC)
Expired: Jul 30, 2016, 12:52 AM MST
In force: 71 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon

Counties Mohave County, AZ, San Bernardino County, CA

The radar

The Las Vegas radar (KESX), 170 km from the middle of the area, began a volume at 06:44 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

Phoenix, AZ (KPSR), launched 00:00Z, 6.7 hours before the alert went out and 218 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: 277 J/kg
Mixed-layer CIN: -241 J/kg
Mixed-layer LCL: 3318 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

659 
WUUS55 KVEF 300641
SVRVEF
AZC015-CAC071-300815-
/O.NEW.KVEF.SV.W.0050.160730T0641Z-160730T0815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1141 PM PDT FRI JUL 29 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN MOHAVE COUNTY IN NORTHWESTERN ARIZONA...
  SOUTHEASTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...

* UNTIL 115 AM PDT/115 AM MST/

* AT 1139 PM PDT/1139 PM MST/...DOPPLER RADAR INDICATED SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH AS WELL AS BLOWING DUST WITH VISIBILITY BRIEFLY BELOW ONE
  QUARTER MILE. THE STORMS ARE LOCATED JUST EAST OF LAKE HAVASU CITY
  MOVING NORTHWEST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LAKE HAVASU CITY...WIKIEUP...ALAMO LAKE...
  HIGHWAY 95 AT MILE MARKER 29...PARKER DAM...
  THREE DUNES CAMPGROUND...EARP...CATTAIL COVE STATE PARK...
  DESERT HILLS...BURRO CREEK CAMPGROUND...VIDAL JUNCTION...
  BLACK MEADOW LANDING CAMPGROUND AND BIG RIVER.

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 3469 11516 3469 11408 3486 11333 3432 11333
      3429 11336 3431 11354 3423 11360 3421 11367
      3424 11373 3422 11384 3426 11386 3425 11401
      3430 11414 3426 11413 3426 11416 3419 11423
      3411 11441 3408 11444 3408 11514
TIME...MOT...LOC 0639Z 121DEG 31KT 3441 11404 

$$

WOLCOTT

2 follow-up statements

591 
WWUS55 KVEF 300736
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1236 AM PDT SAT JUL 30 2016

AZC015-CAC071-300815-
/O.CON.KVEF.SV.W.0050.000000T0000Z-160730T0815Z/
MOHAVE AZ-SAN BERNARDINO CA-
1236 AM PDT SAT JUL 30 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM
PDT/115 AM MST/ FOR SOUTHWESTERN MOHAVE AND SOUTHEASTERN SAN
BERNARDINO COUNTIES...

AT 1232 AM PDT/1232 AM MST/...TRAINED SPOTTERS REPORTED THUNDERSTORM
WIND GUSTS CREATING BLOWING DUST REDUCING VISIBILITY TO ONE-QUARTER
MILE ACROSS SOUTHERN MOHAVE AND SOUTHEAST SAN BERNARDINO COUNTIES.
WIND GUSTS TO 60 MPH ARE POSSIBLE WITH THIS STORM. THE GUST FRONT
WAS MOVING NORTHWEST AT 35 MPH ACROSS SOUTHEAST SAN BERNARDINO
COUNTY.

LOCATIONS IMPACTED INCLUDE...
LAKE HAVASU CITY...WIKIEUP...ALAMO LAKE...
HIGHWAY 95 AT MILE MARKER 29...PARKER DAM...THREE DUNES CAMPGROUND...
EARP...CATTAIL COVE STATE PARK...DESERT HILLS...
BURRO CREEK CAMPGROUND...VIDAL JUNCTION...
BLACK MEADOW LANDING CAMPGROUND AND BIG RIVER.

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 3469 11516 3469 11408 3486 11333 3432 11333
      3429 11336 3431 11354 3423 11360 3421 11367
      3424 11373 3422 11384 3426 11386 3425 11401
      3430 11414 3426 11413 3426 11416 3419 11423
      3411 11441 3408 11444 3408 11514
TIME...MOT...LOC 0732Z 121DEG 31KT 3465 11452 

$$

WOLCOTT

353 
WWUS55 KVEF 300752
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1252 AM PDT SAT JUL 30 2016

AZC015-CAC071-300801-
/O.CAN.KVEF.SV.W.0050.000000T0000Z-160730T0815Z/
MOHAVE AZ-SAN BERNARDINO CA-
1252 AM PDT SAT JUL 30 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MOHAVE AND
SOUTHEASTERN SAN BERNARDINO COUNTIES IS CANCELLED...
                
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 HAS BEEN CANCELLED. HOWEVER GUSTY WINDS TO
40 MPH ARE STILL POSSIBLE THROUGH TONIGHT.

LAT...LON 3469 11516 3469 11408 3486 11333 3432 11333
      3429 11336 3431 11354 3423 11360 3421 11367
      3424 11373 3422 11384 3426 11386 3425 11401
      3430 11414 3426 11413 3426 11416 3419 11423
      3411 11441 3408 11444 3408 11514
TIME...MOT...LOC 0749Z 121DEG 31KT 3474 11469 

$$

WOLCOTT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 12:26 AM MST	Severe Thunderstorm Warning	VEF	Mohave	64 min
Jul 30, 12:50 AM MST	Severe Thunderstorm Warning	VEF	Mohave	85 min
Jul 30, 1:07 AM MST	Flash Flood Warning	VEF	Mohave	3 hr
Jul 30, 1:28 AM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Jul 30, 2:24 AM MST	Areal Flood Warning	VEF	Mohave	12 hr
Jul 30, 2:22 PM MST	Flash Flood Watch	VEF	Mohave	12 hr
Jul 29, 5:39 PM MST	Areal Flood Advisory	VEF	Inyo	3 hr
Jul 30, 3:18 AM MST	Areal Flood Advisory	VEF	San Bernardino	117 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2016 Severe Thunderstorm Warnings in California, 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.