Flash Flood Warning 40, NWS Las Vegas, NV

951 
WGUS75 KVEF 020747
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
1247 AM PDT Mon Sep 2 2019

NVC003-020915-
/O.CON.KVEF.FF.W.0040.000000T0000Z-190902T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
1247 AM PDT Mon Sep 2 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 AM PDT FOR
SOUTHERN CLARK COUNTY...

At 1245 AM PDT, Doppler radar indicated thunderstorms had drifted 
west away from Cottonwood Cove Road. However, very heavy rain fell 
on the road, and is likely flowing toward the river.

Some locations that will experience flooding include...
Cottonwood Cove and Cottonwood Cove Campground. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3545 11489 3549 11490 3551 11468 3547 11467
      3546 11467

$$

Morgan

927 
WGUS75 KVEF 020922
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
222 AM PDT Mon Sep 2 2019

NVC003-020932-
/O.EXP.KVEF.FF.W.0040.000000T0000Z-190902T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
222 AM PDT Mon Sep 2 2019

...THE FLASH FLOOD WARNING FOR SOUTHERN CLARK COUNTY HAS EXPIRED...

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

LAT...LON 3545 11489 3549 11490 3551 11468 3547 11467
      3546 11467

$$

Lericos

Area Forecast Discussion
National Weather Service Las Vegas NV
240 PM PDT Sun Sep 1 2019

.SYNOPSIS...Thunderstorm chances will increase this week as
monsoonal moisture makes a return to the southern Great Basin and
Mojave Desert. Thunderstorm chances will mainly impact areas south
of I-40 this evening, but will gradually push north through the
remainder of the week. Gusty winds and flash flooding will be the
primary threats from these storms. Given increased clouds and shower
activity, temperatures will cool to near normal values for early
September.
&&

.DISCUSSION...through Sunday.

Once again, hot temperatures are impacting the region this afternoon
with readings running several degrees above normal. Today will be
the last day of excessive temperatures as the strong high pressure
that has been sitting over the area shifts east and we also get an
increase in monsoonal moisture. Mid level clouds have generally been
increasing through the afternoon as the moisture starts making its
push northward. Thunderstorms have increased in coverage this
afternoon across central and southern Arizona and have developed
just east of Mohave County. Local hires models have been rather
consistent today in developing a thunderstorm complex that will
track west across southern Mohave County and impact the Colorado
River Valley this evening, likely between 8pm and midnight. Not only
will there be potential of brief heavy rain, but strong gusty winds
will be possible. Some of the models are showing outflow winds
between 40+ mph affecting southern areas of Mohave County through
the Colorado River Valley including Lake Havasu, so boaters should
especially be cautious this evening and prepare for the potential
for strong winds. This complex may continue into southern Nevada,
but indications are that it will weaken significantly, but a few
sprinkles will be possible overnight.

Monsoon moisture will continue to push north over the next few days
resulting in isolated to scattered showers and thunderstorms each
afternoon through the end of the week, especially in the favored
higher terrain. Gusty winds and the potential for flash flooding
will be the biggest concerns as the upper steering flow remains
fairly light through Wednesday. Beyond Wednesday, the models differ
on how quick the moisture gets pushed out of the area. It's possible
that we could see at least a chance of afternoon thunderstorms each
day into next weekend as the trough off the west coast may not move
in as quick. Temperatures will remain near to slightly above normal
through the week.
&&

.AVIATION...For McCarran...Winds will gradually shift to the
south southeast by mid afternoon with gusts of 15-20 knots possible.
Early this evening gusts will taper off as winds shift to the
southwest at around 10 knots or less through early tomorrow morning.
There continues to be a low-end chance of some brief, gusty outflow
winds moving through the valley out of the southeast between 06z-09z
associated with storms over northwest Arizona. If this scenario does
occur, speeds do not look to to be very impactful leaving the wind
shift as the main concern. Light, easterly winds are expected Monday
morning which will then favor the southerly direction during the
afternoon. However, this could change quickly as scattered showers
and storms develop around Clark County between 20z-05z.

For the rest of southern Nevada, northwest Arizona and southeast
California...Outside of shower and storm development, winds will
remain south to southwesterly today and tomorrow with gusts up to
around 20 knots possible both afternoons. Hi-res models continue to
indicated an area of showers and storms moving into Mohave County
later this evening into tonight; pushing towards the Colorado River
Valley terminals. Estimated wind shifts and VCSH have been included
at these locations but confidence is low in these outflow winds
making it all the way up into the Las Vegas Valley. A few showers
could linger into Monday morning with afternoon showers and storms
initiating between 19z-21z. Locally heavy rain, lightning, and gusty
winds will be possible with storm activity Monday afternoon and
evening.
&&

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

DISCUSSION...Gorelow
AVIATION...Guillet

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

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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1012 PM PDT SUN SEP 1 2019

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

1005 PM     DUST STORM       1 WSW LAKE HAVASU CITY  34.48N 114.35W
09/01/2019                   MOHAVE             AZ   TRAINED SPOTTER

            SPOTTER REPORTS A DUST STORM IN LAKE HAVASU
            CITY ALONG WILLOW AVENUE NEAR AZ 95 WITH
            VISIBILITY TO NEAR ZERO.

&&

VARIAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1050 PM PDT SUN SEP 1 2019

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

1025 PM     DUST STORM       4 SE WILLOW VALLEY      34.87N 114.56W
09/01/2019                   MOHAVE             AZ   LAW ENFORCEMENT

            MOHAVE VALLEY LAW ENFORCEMENT REPORTED A
            DUST STORM WITH VISIBILITY 30 TO 40 FEET.

&&

VARIAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1124 PM PDT SUN SEP 1 2019

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

1100 PM     TSTM WND GST     11 N BULLHEAD CITY      35.27N 114.58W
09/01/2019  M50 MPH          MOHAVE             AZ   MESONET

            GUST 50 MPH MEASURED AT KATHERINES LANDING.

&&

VARIAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1200 AM PDT MON SEP 2 2019

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

1148 PM     TSTM WND GST     HOOVER DAM              36.01N 114.74W
09/01/2019  M70 MPH          CLARK              NV   MESONET

            MEASURED WIND GUST OF 70 MPH ALONG US 93 AT
            THE HOOVER DAM BRIDGE. GUSTS EXCEEDING 58
            MPH BEGAN AT 2337 PDT.

1135 PM     FLASH FLOOD      EARP                    34.16N 114.30W
09/01/2019                   SAN BERNARDINO     CA   DEPT OF HIGHWAYS

            CALTRANS REPORTED SR 62 IS CLOSED AT PARKER
            DAM ROAD DUE TO FLOODING.

1130 PM     TSTM WND GST     10 SSE ESSEX            34.59N 115.21W
09/01/2019  M78 MPH          SAN BERNARDINO     CA   MESONET

            MEASURED GUST OF 78 MPH AT OLD WOMAN
            MOUNTAIN. GUSTS EXCEEDING 58 MPH BEGAN AT
            2310 PDT.

1118 PM     TSTM WND DMG     5 S AMBOY               34.49N 115.74W
09/01/2019                   SAN BERNARDINO     CA   LAW ENFORCEMENT

            CHP REPORTED POWER POLES HAVE FALLEN OVER
            AND ARE IN THE ROADWAY DUE TO HIGH WINDS.

&&

VARIAN