Flash Flood Warning 4, NWS Las Vegas, NV

211 
WGUS75 KVEF 042349
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
449 PM PDT Sun May 4 2025

AZC015-CAC071-050145-
/O.CON.KVEF.FF.W.0004.000000T0000Z-250505T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-San Bernardino CA-
449 PM PDT Sun May 4 2025 /449 PM MST Sun May 4 2025/

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM PDT /645 PM 
MST/ THIS EVENING FOR SOUTHWESTERN MOHAVE AND SAN BERNARDINO 
COUNTIES...

At 449 PM PDT /449 PM MST/, Local law enforcement reported 
thunderstorms producing heavy rain across the warned area. Flash 
flooding is already occurring.

HAZARD...Life-threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...California Highway Patrol reports flash flooding on
         State Route 62 and Parker Dam Road near Parker.

IMPACT...Life-threatening flash flooding of low-water crossings,
         creeks, normally dry washes and roads.

Some locations that will experience flash flooding include...
  Parker Dam, Vidal Junction, Big River, Earp, Black Meadow Landing 
  Campground, Three Dunes Campground and Cattail Cove State Park.

This includes the following highways...
	State Route 95 in Mohave County between mile markers 162 and 173.
	Highway 95 in San Bernardino County between mile markers 1 and 28.
State Route 62 in San Bernardino County between mile markers 91 and 
138...and
	near mile marker 139...and
	between mile markers 140 and 142.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3442 11433 3444 11406 3426 11398 3426 11404
      3429 11407 3430 11414 3426 11413 3426 11417
      3419 11423 3417 11429 3412 11437 3411 11442
      3408 11444 3408 11526 3429 11531 3441 11513
      3444 11448

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

AN

138 
WGUS55 KVEF 050133
FFWVEF
AZC015-CAC071-050245-
/O.EXT.KVEF.FF.W.0004.000000T0000Z-250505T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
633 PM PDT Sun May 4 2025

The National Weather Service in Las Vegas has extended the

* Flash Flood Warning for...
  Southwestern Mohave County in northwestern Arizona...
  San Bernardino County in southern California...

* Until 745 PM PDT /745 PM MST/.

* At 633 PM PDT /633 PM MST/, Local law enforcement reported 
  thunderstorms producing heavy rain across the warned area. Flash 
  flooding is already occurring.

  HAZARD...Life-threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...California Highway Patrol reports flash flooding on
           State Route 62 and Parker Dam Road near Parker.

  IMPACT...Life-threatening flash flooding of low-water
           crossings, creeks, normally dry washes and roads.

* Some locations that will experience flash flooding include...
  Parker Dam, Vidal Junction, Big River, Earp, Black Meadow Landing 
  Campground, Three Dunes Campground and Cattail Cove State Park.

This includes the following highways...
	State Route 95 in Mohave County between mile markers 162 and 173.
	Highway 95 in San Bernardino County between mile markers 1 and 27.
State Route 62 in San Bernardino County between mile markers 94 and 
106...and
	between mile markers 113 and 138...and
	near mile marker 139...and
	between mile markers 140 and 142.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3426 11398 3426 11402 3427 11402 3426 11404
      3429 11407 3430 11414 3426 11413 3426 11417
      3420 11423 3419 11423 3417 11429 3412 11437
      3411 11442 3408 11444 3409 11508 3427 11510
      3437 11505 3444 11448 3442 11433 3444 11406

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

AN

520 
WGUS75 KVEF 050241
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
741 PM PDT Sun May 4 2025

AZC015-CAC071-050251-
/O.EXP.KVEF.FF.W.0004.000000T0000Z-250505T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-San Bernardino CA-
741 PM PDT Sun May 4 2025 /741 PM MST Sun May 4 2025/

...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM PDT /745 PM MST/ THIS 
EVENING FOR SOUTHWESTERN MOHAVE AND SAN BERNARDINO COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 3426 11398 3426 11402 3427 11402 3426 11404
      3429 11407 3430 11414 3426 11413 3426 11417
      3420 11423 3419 11423 3417 11429 3412 11437
      3411 11442 3408 11444 3409 11508 3427 11510
      3437 11505 3444 11448 3442 11433 3444 11406

$$

AN

Area Forecast Discussion
National Weather Service Las Vegas NV
1204 PM PDT Sun May 4 2025

.SYNOPSIS...Showers, thunderstorms, and much cooler than normal
temperatures will persist through Monday for much of the area as a
strong storm system continues to impact the area. Beyond Monday,
we will see a drying and warming trend through the next week,
with temperatures well above normal by the end of the week.

&&

.SHORT TERM...through Monday Night.

The strong storm system, currently centered just south of Lake Havasu
continues to bring convective activity to much of the region. In
areas where clearing is occurring, mainly Mohave County, we are
seeing storms form in an increasingly unstable environment, with
CAPE values in the 1000-1500 J/kg range through early evening.
Storms will diminish in coverage and intensity after sunset.
However, dynamic forcing will be enough to keep scattered shower
activity going through the night in many areas. Convective
activity increases again Monday around sunrise for Clark and
Lincoln Counties as well as the Colorado River and Mohave County.
Much cooler than normal temperatures will be the norm for today
and tomorrow as we reside on the cool side of the trough.
Temperatures will run 10-15 degrees below normal through Monday.

.LONG TERM...Tuesday through Saturday.

A period of quieter weather begins Tuesday as the strong trough of
low pressure that brought us all of the active weather these past few
days moves off to the east. A few showers could linger on Tuesday in
Mohave County. Subsequently, a building ridge will slingshot our
temperatures from well below normal to well above normal by the end
of the week. Ensembles are in remarkable agreement on temperatures
in Las Vegas reaching the mid-upper 90s by Saturday with a 10%
chance of reaching 100. No significant winds or precipitation are
expected beyond Tuesday.

&&

.AVIATION...For Harry Reid...For the 18Z Forecast
Package...Periods of showers and thunderstorms will be the
primary aviation concern this forecast period, with intermittent
impacts expected at the terminal including erratic gusty winds,
MVFR/IFR conditions in low clouds and rain, as well as lightning
strikes. Prevailing winds will be mainly northerly today with
periods of variable direction due to storm outflow. Showers in
the area will diminish a bit this evening with sunset. With
showers will come variable and gusty winds. Showers and isolated
thunderstorms will return early Monday. CIGS of 7-10kft today will
decrease to 5-7kft Monday with cooler air settling in.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 18Z Forecast Package...KVGT and KHND will
follow similar trends to KLAS, with periods of showers and
thunderstorms expected through the forecast period. Elsewhere,
showers and thunderstorms remain the primary concerns for all
terminals. At KBIH, convection redevelops in the vicinity of the
terminal around 17Z, with the best window for thunderstorms late
this afternoon. Winds will generally be northwesterly and
intermittently gusty, though outflow boundaries will produce some
variability. Winds at KDAG will remain westerly with gusts to
20-25KT expected from early this afternoon through Monday morning.
Showers begin there around 20Z, with a window for thunderstorms
late this afternoon through the rest of the forecast period. In
the Lower Colorado River Valley, intermittent showers will
continue much of the day, with thunderstorms expected this
afternoon. Winds will generally remain northwesterly outside of
boundary influences, shifting to the southwest and southeast this
evening when a lull in convection is expected. In and around showers
and thunderstorms this afternoon through Monday morning, erratic
gusty winds, lightning strikes, and brief MVFR/IFR conditions can
be expected.

&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.

&&

DISCUSSION/AVIATION...Berc

For more forecast information...see us on our webpage:
https://weather.gov/lasvegas or follow us on Facebook and Twitter

Preliminary Local Storm Report
National Weather Service Las Vegas NV
1032 AM PDT Sun May 4 2025

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

0235 PM     Tstm Wnd Gst     3 SW Mercury            36.62N 116.03W
05/03/2025  M69 MPH          Nye                NV   ASOS

            Corrects previous tstm wnd gst report from 3
            SW Mercury. Desert Rock ASOS gusted to 69
            mph from a nearby thunderstorm.

&&

JS