Alert archive / Arizona / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 13, NWS Las Vegas, NV

July 17, 2017Mohave County, Arizona; San Bernardino County, California

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 17, 2017, 7:19 PM MST for Mohave County, Arizona; San Bernardino County, California. It was in force for 56 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 17, 2017, 7:19 PM MST (02:19 UTC)
Expired: Jul 17, 2017, 8:15 PM MST
In force: 56 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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 02:20 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.

The nearest sounding before it

Yuma Prvg Ground, AZ (K1Y7), launched 00:00Z, 2.3 hours before the alert went out and 202 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: 411 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 2464 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

561 
WUUS55 KVEF 180219
SVRVEF
AZC015-CAC071-180315-
/O.NEW.KVEF.SV.W.0013.170718T0219Z-170718T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
719 PM PDT MON JUL 17 2017

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 815 PM PDT/815 PM MST/

* At 718 PM PDT/718 PM MST/, severe thunderstorms were located along
  a line extending from 11 miles east of Yucca to 11 miles east of 
  Parker Dam to 13 miles northwest of Gladden, moving west at 15 mph 
  towards Lake Havasu City and Parker Dam .

  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...
  Lake Havasu City, Highway 95 At Mile Marker 29, Topock, Parker Dam,
  Yucca, Three Dunes Campground, Cattail Cove State Park, Desert
  Hills, Black Meadow Landing Campground, Earp, Vidal Junction and
  Big River.

This includes the following highways...
 Interstate 40 in Arizona between mile markers 0 and 26.
 Interstate 40 in California between mile markers 153 and 155.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Lake Havasu, get away from the water and move indoors 
or inside a vehicle. Remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 3464 11476 3499 11387 3436 11386 3422 11366
      3421 11370 3424 11373 3422 11384 3426 11386
      3425 11401 3430 11409 3430 11414 3426 11413
      3426 11416 3419 11423 3412 11437 3411 11441
      3408 11444 3408 11465
TIME...MOT...LOC 0218Z 079DEG 12KT 3491 11396 3436 11394 3402 11349 

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

AA

2 follow-up statements

806 
WWUS55 KVEF 180250
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
750 PM PDT MON JUL 17 2017

AZC015-CAC071-180315-
/O.CON.KVEF.SV.W.0013.000000T0000Z-170718T0315Z/
Mohave AZ-San Bernardino CA-
750 PM PDT MON JUL 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM
PDT/815 PM MST/ FOR SOUTHWESTERN MOHAVE AND SOUTHEASTERN SAN
BERNARDINO COUNTIES...

At 749 PM PDT/749 PM MST/, severe thunderstorms were located along a
line extending from near Yucca to near Parker Dam to 12 miles north
of Wenden, moving west at 15 mph.

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...
Lake Havasu City, Highway 95 At Mile Marker 29, Parker Dam, Three
Dunes Campground, Cattail Cove State Park, Desert Hills, Black Meadow
Landing Campground, Earp, Vidal Junction and Big River.

This includes Interstate 40 in Arizona between mile markers 12 and
13.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Lake Havasu, get away from the water and move indoors 
or inside a vehicle. remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 3464 11476 3481 11387 3436 11386 3422 11366
      3421 11370 3424 11373 3422 11384 3426 11386
      3425 11401 3430 11409 3430 11414 3426 11413
      3426 11416 3419 11423 3412 11437 3411 11441
      3408 11444 3408 11465
TIME...MOT...LOC 0249Z 079DEG 12KT 3489 11408 3434 11406 3400 11361 

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

AA

746 
WWUS55 KVEF 180314
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
814 PM PDT MON JUL 17 2017

AZC015-CAC071-180320-
/O.EXP.KVEF.SV.W.0013.000000T0000Z-170718T0315Z/
Mohave AZ-San Bernardino CA-
814 PM PDT MON JUL 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MOHAVE AND
SOUTHEASTERN SAN BERNARDINO COUNTIES WILL EXPIRE AT 815 PM PDT/815 PM
MST/...

The Severe Thunderstorm Warning west of the Colorado River has 
expired. The threat for storms has diminished at this time. 

A Severe Thunderstorm Warning still remains in effect for areas 
including and east of Lake Havasu and Parker Dam.  

LAT...LON 3464 11476 3481 11387 3436 11386 3422 11366
      3421 11370 3424 11373 3422 11384 3426 11386
      3425 11401 3430 11409 3430 11414 3426 11413
      3426 11416 3419 11423 3412 11437 3411 11441
      3408 11444 3408 11465
TIME...MOT...LOC 0310Z 079DEG 12KT 3488 11416 3433 11414 3399 11369 

$$

AA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 5:02 PM MST	Flash Flood Warning	VEF	Mohave	3 hr
Jul 17, 6:57 PM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Jul 17, 7:02 PM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Jul 17, 8:05 PM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Jul 17, 8:09 PM MST	Severe Thunderstorm Warning	VEF	Mohave	35 min
Jul 18, 3:29 AM MST	Flash Flood Watch	VEF	Mohave	41 hr
Jul 18, 1:59 PM MST	Flash Flood Warning	VEF	Mohave	5 hr
Jul 18, 2:18 PM MST	Flash Flood Warning	VEF	Mohave	3 hr
Jul 18, 2:57 PM MST	Flash Flood Warning	VEF	Mohave	5 hr
Jul 18, 4:25 PM MST	Severe Thunderstorm Warning	VEF	Mohave	50 min
Jul 18, 3:45 PM MST	Areal Flood Advisory	VEF	San Bernardino	3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2017 Severe Thunderstorm Warnings in California, 2017 Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.