Flash Flood Watch 2, NWS Las Vegas, NV

237 
WGUS65 KVEF 111746
FFAVEF

Flood Watch
National Weather Service Las Vegas NV
1046 AM PDT Wed Mar 11 2020

...Another round of widespread rainfall resulting in flash
flooding will be possible Thursday and Friday...

.After a brief lull in rainfall this afternoon and overnight,
heavy rainfall is expected to return to the region by Thursday
afternoon and persist through Friday. Heavy rain rates coupled
with already moist conditions due to rainfall earlier in the week
will result in a significant risk of flash flooding.

CAZ524>527-NVZ021-022-121015-
/O.CON.KVEF.FF.A.0002.200312T1800Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Eastern Mojave Desert-Morongo Basin-Cadiz Basin-
San Bernardino County-Upper Colorado River Valley-
Lake Mead National Recreation Area-Southern Clark County-
1046 AM PDT Wed Mar 11 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THURSDAY MORNING
THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of southeast California and southern Nevada, 
  including the following areas, in southeast California, Cadiz 
  Basin, Eastern Mojave Desert, Morongo Basin, and San 
  Bernardino County-Upper Colorado River Valley. In southern 
  Nevada, Lake Mead National Recreation Area and Southern Clark 
  County. 

* From Thursday morning through Friday morning

* Another round of moderate to heavy rainfall is expected to 
  approach from the south on Thursday morning as an upper low 
  moves on shore in southern California. Some isolated 
  thunderstorms may also help to create locally heavy rainfall, 
  especially during the afternoon hours Thursday. This threat of 
  heavy rainfall, coupled with already moist conditions from 
  widespread rain earlier in the week, will lead to an elevated 
  risk for flash flooding. 

* The heaviest rainfall is expected along and south of the 
  Interstate 40 corridor. Any area roadways impacted by flooded 
  washes may be forced to close. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

AZZ001>003-036-121015-
/O.CON.KVEF.FF.A.0002.200312T1800Z-200314T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts-
Lake Mead National Recreation Area-
1046 AM MST Wed Mar 11 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THURSDAY MORNING
THROUGH FRIDAY AFTERNOON...

The Flash Flood Watch continues for

* A portion of northwest Arizona, including the following areas, 
  Lake Havasu and Fort Mohave, Lake Mead National Recreation 
  Area, Northwest Deserts, and Northwest Plateau. 

* From Thursday morning through Friday afternoon

* Another round of moderate to heavy rainfall is expected to 
  approach from the south on Thursday morning as an upper low 
  moves on shore in southern California. Some isolated 
  thunderstorms may also help to create locally heavy rainfall, 
  especially during the afternoon hours Thursday. This threat of 
  heavy rainfall, coupled with already moist conditions from 
  widespread rain earlier in the week, will lead to an elevated 
  risk for flash flooding. 

* The heaviest rainfall is expected along and south of the 
  Interstate 40 corridor. Any area roadways impacted by flooded 
  washes may be forced to close. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

994 
WGUS65 KVEF 121012
FFAVEF

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Las Vegas NV
312 AM PDT Thu Mar 12 2020

...Another round of widespread rainfall resulting in flash
flooding will be possible Today through Friday...

.Another round of heavy rainfall is expected to return to the 
region this afternoon and persist through Friday. Heavy rain 
rates coupled with already moist conditions due to rainfall 
earlier in the week will result in a significant risk of flash 
flooding.

NVZ016-017-020-121800-
/O.EXB.KVEF.FF.A.0002.200313T0000Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northeast Clark County-Western Clark and Southern Nye County-
Las Vegas Valley-
312 AM PDT Thu Mar 12 2020

...FLASH FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH FRIDAY
MORNING...

The National Weather Service in Las Vegas has expanded the

* Flash Flood Watch to include a portion of southern Nevada, 
  including the following areas, Las Vegas Valley, Northeast 
  Clark County, and Western Clark and Southern Nye County. 

* From this afternoon through Friday morning

* Another round of moderate to heavy rainfall is expected to
  approach from the south this morning as an upper low moves on
  shore in southern California. Showers and thunderstorms will be
  possible by the afternoon resulting higher chances for heavy
  rainfall. This threat of heavy rainfall, coupled with already 
  moist conditions from widespread rain earlier in the week, will 
  lead to an elevated risk for flash flooding. 

* The heaviest rain totals are expected along and south of the
  Interstate 40 corridor, however, extended periods of moderate to
  heavy rainfall could exist as far north as northern Clark County
  which could result in a chance for flash flooding as well,
  especially overnight Thursday into Friday morning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

CAZ523-121800-
/O.EXA.KVEF.FF.A.0002.200312T1800Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Mojave Desert-
312 AM PDT Thu Mar 12 2020

...FLASH FLOOD WATCH IN EFFECT FROM 11 AM PDT THIS MORNING
THROUGH FRIDAY MORNING...

The National Weather Service in Las Vegas has expanded the

* Flash Flood Watch to include a portion of southeast 
  California, including the following area, Western Mojave 
  Desert. 

* From 11 AM PDT this morning through Friday morning

* Another round of moderate to heavy rainfall is expected to 
  approach from the south on Thursday morning as an upper low 
  moves on shore in southern California. Some isolated 
  thunderstorms may also help to create locally heavy rainfall, 
  especially during the afternoon hours Thursday. This threat of 
  heavy rainfall, coupled with already moist conditions from 
  widespread rain earlier in the week, will lead to an elevated 
  risk for flash flooding. 

* The heaviest rainfall is expected along and south of the
  Interstate 15 corridor. Any area roadways impacted by flooded 
  washes may be forced to close. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

CAZ524>527-NVZ021-022-121800-
/O.CON.KVEF.FF.A.0002.200312T1800Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Eastern Mojave Desert-Morongo Basin-Cadiz Basin-
San Bernardino County-Upper Colorado River Valley-
Lake Mead National Recreation Area-Southern Clark County-
312 AM PDT Thu Mar 12 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 11 AM PDT THIS
MORNING THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of southeast California and southern Nevada, including
  the following areas in southeast California...the Cadiz Basin, 
  Eastern Mojave Desert, Morongo Basin, and San Bernardino County-
  Upper Colorado River Valley. In southern Nevada, the Lake Mead 
  National Recreation Area and Southern Clark County. 

* From 11 AM PDT this morning through Friday morning

* Another round of moderate to heavy rainfall is expected to 
  approach from the south on Thursday morning as an upper low 
  moves on shore in southern California. Some isolated 
  thunderstorms may also help to create locally heavy rainfall, 
  especially during the afternoon hours Thursday. This threat of 
  heavy rainfall, coupled with already moist conditions from 
  widespread rain earlier in the week, will lead to an elevated 
  risk for flash flooding. 

* Between 1 and 2 inches of rainfall is possible across the watch
  area. Some localized amounts could eclipse 2 inches, especially
  where thunderstorms develop. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

AZZ001>003-036-121800-
/O.CON.KVEF.FF.A.0002.200312T1800Z-200314T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts-
Lake Mead National Recreation Area-
312 AM MST Thu Mar 12 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 11 AM MST THIS
MORNING THROUGH FRIDAY AFTERNOON...

The Flash Flood Watch continues for

* A portion of northwest Arizona, including the following areas, 
  Lake Havasu and Fort Mohave, Lake Mead National Recreation 
  Area, Northwest Deserts, and Northwest Plateau. 

* From 11 AM MST this morning through Friday afternoon

* Another round of moderate to heavy rainfall is expected to 
  approach from the south on Thursday morning as an upper low 
  moves on shore in southern California. Some isolated 
  thunderstorms may also help to create locally heavy rainfall, 
  especially during the afternoon hours Thursday. This threat of 
  heavy rainfall, coupled with already moist conditions from 
  widespread rain earlier in the week, will lead to an elevated 
  risk for flash flooding. 

* The heaviest rainfall is expected along and south of the
  Interstate 40 corridor but flash flood impacts may be possible
  across the entire county through Friday afternoon. Any area 
  roadways impacted by flooded washes may be forced to close.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

278 
WGUS65 KVEF 121732
FFAVEF

Flood Watch
National Weather Service Las Vegas NV
1032 AM PDT Thu Mar 12 2020

.Another round of heavy rainfall is expected to return to the 
region this afternoon and persist through Friday. Heavy rain rates
coupled with already moist conditions due to rainfall earlier in 
the week will result in a significant risk of flash flooding.

CAZ523>527-NVZ021-022-130000-
/O.CON.KVEF.FF.A.0002.200312T1800Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Mojave Desert-Eastern Mojave Desert-Morongo Basin-
Cadiz Basin-San Bernardino County-Upper Colorado River Valley-
Lake Mead National Recreation Area-Southern Clark County-
1032 AM PDT Thu Mar 12 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of southeast California and southern Nevada, 
  including the following areas, in southeast California, Cadiz 
  Basin, Eastern Mojave Desert, Morongo Basin, San Bernardino 
  County-Upper Colorado River Valley, and Western Mojave Desert. 
  In southern Nevada, Lake Mead National Recreation Area and 
  Southern Clark County. 

* Through Friday morning

* Another round of moderate to heavy rainfall was moving in from
  the south this morning. Some isolated thunderstorms may also
  help to create locally heavy rainfall, especially this
  afternoon. This threat of heavy rainfall, coupled with already 
  moist conditions from widespread rain earlier in the week, will 
  lead to an elevated risk for flash flooding. 

* Between 1 and 2 inches of rainfall is possible across the watch
  area. Some localized amounts could exceed 2 inches, especially 
  where thunderstorms develop. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

AZZ001>003-036-130000-
/O.CON.KVEF.FF.A.0002.200312T1800Z-200314T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts-
Lake Mead National Recreation Area-
1032 AM MST Thu Mar 12 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY AFTERNOON...

The Flash Flood Watch continues for

* A portion of northwest Arizona, including the following areas, 
  Lake Havasu and Fort Mohave, Lake Mead National Recreation 
  Area, Northwest Deserts, and Northwest Plateau. 

* Through Friday afternoon

* Another round of moderate to heavy rainfall was moving in from
  the south this morning. Some isolated thunderstorms may also
  help to create locally heavy rainfall, especially this
  afternoon. This threat of heavy rainfall, coupled with already
  moist conditions from widespread rain earlier in the week, will
  lead to an elevated risk for flash flooding. 

* The heaviest rainfall is expected along and south of Interstate
  40, but flash flood impacts will be possible across the entire 
  county through Friday afternoon. Any area roadways impacted by 
  flooded washes may be forced to close. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

NVZ016-017-020-130000-
/O.CON.KVEF.FF.A.0002.200313T0000Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northeast Clark County-Western Clark and Southern Nye County-
Las Vegas Valley-
1032 AM PDT Thu Mar 12 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 5 PM PDT THIS
AFTERNOON THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* A portion of southern Nevada, including the following areas, 
  Las Vegas Valley, Northeast Clark County, and Western Clark 
  and Southern Nye County. 

* From 5 PM PDT this afternoon through Friday morning

* Another round of moderate to heavy rainfall was moving in from
  the south this morning. Some isolated thunderstorms may also
  help to create locally heavy rainfall, especially this
  afternoon. This threat of heavy rainfall, coupled with already
  moist conditions from widespread rain earlier in the week, will
  lead to an elevated risk for flash flooding. 

* Rainfall totals from half an inch to one and a half inches are
  likely on the desert floors, with higher amounts in higher 
  terrain, especially on east facing slopes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

Morgan

199 
WGUS65 KVEF 122139
FFAVEF

Flood Watch
National Weather Service Las Vegas NV
239 PM PDT Thu Mar 12 2020

.Another round of heavy rainfall is expected to return to the
region this afternoon and persist through Friday. Heavy rain
rates coupled with already moist conditions due to rainfall
earlier in the week will result in a significant risk of flash
flooding.

CAZ523>527-NVZ021-022-131100-
/O.CON.KVEF.FF.A.0002.000000T0000Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Mojave Desert-Eastern Mojave Desert-Morongo Basin-
Cadiz Basin-San Bernardino County-Upper Colorado River Valley-
Lake Mead National Recreation Area-Southern Clark County-
239 PM PDT Thu Mar 12 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of southeast California and southern Nevada, 
  including the following areas, in southeast California, Cadiz 
  Basin, Eastern Mojave Desert, Morongo Basin, San Bernardino 
  County-Upper Colorado River Valley, and Western Mojave Desert. 
  In southern Nevada, Lake Mead National Recreation Area and 
  Southern Clark County. 

* Through Friday morning

* Another round of moderate to heavy rainfall was moving in from
  the south this afternoon. Some isolated thunderstorms may also
  help to create locally heavy rainfall, especially this afternoon
  and evening. This threat of heavy rainfall, coupled with 
  already moist conditions from widespread rain earlier in the 
  week, will lead to an elevated risk for flash flooding. 

* Between 1 and 2 inches of rainfall is possible across the 
  watch area. Some localized amounts could exceed 2 inches, 
  especially where thunderstorms develop. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

AZZ001>003-036-131100-
/O.CON.KVEF.FF.A.0002.000000T0000Z-200314T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts-
Lake Mead National Recreation Area-
239 PM MST Thu Mar 12 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY AFTERNOON...

The Flash Flood Watch continues for

* A portion of northwest Arizona, including the following areas, 
  Lake Havasu and Fort Mohave, Lake Mead National Recreation 
  Area, Northwest Deserts, and Northwest Plateau. 

* Through Friday afternoon

* Another round of moderate to heavy rainfall was moving in from
  the south this afternoon. Some isolated thunderstorms may also
  help to create locally heavy rainfall, especially this afternoon
  and evening. This threat of heavy rainfall, coupled with 
  already moist conditions from widespread rain earlier in the 
  week, will lead to an elevated risk for flash flooding. 

* The heaviest rainfall is expected along and south of 
  Interstate 40, but flash flood impacts will be possible across 
  the entire county through Friday afternoon. Any area roadways 
  impacted by flooded washes may be forced to close. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

NVZ016-017-020-131100-
/O.CON.KVEF.FF.A.0002.200313T0000Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northeast Clark County-Western Clark and Southern Nye County-
Las Vegas Valley-
239 PM PDT Thu Mar 12 2020

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* A portion of southern Nevada, including the following areas, 
  Las Vegas Valley, Northeast Clark County, and Western Clark 
  and Southern Nye County. 

* Through Friday morning

* Another round of moderate to heavy rainfall was moving in from
  the south this afternoon. Some isolated thunderstorms may also
  help to create locally heavy rainfall, especially this afternoon
  and evening. This threat of heavy rainfall, coupled with 
  already moist conditions from widespread rain earlier in the 
  week, will lead to an elevated risk for flash flooding. 

* Rainfall totals from half an inch to one and a half inches are 
  likely on the desert floors, with higher amounts in higher 
  terrain, especially on east facing slopes. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may become favorable
for flooding of washes...streams and other drainage areas in the
watch area. If you are in the watch area...you should closely
monitor weather forecasts and be prepared to take immediate
action should heavy rain and flooding occur or a flash flood
warning is issued.

Listen to NOAA weather radio...commercial radio or television
stations for updates on this flash flood threat or by visiting us
online at

weather.gov/lasvegas

&&

$$

Morgan

508 
WGUS65 KVEF 131055
FFAVEF

Flood Watch
National Weather Service Las Vegas NV
355 AM PDT Fri Mar 13 2020


CAZ523>527-NVZ016-017-020>022-131200-
/O.CAN.KVEF.FF.A.0002.000000T0000Z-200313T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Mojave Desert-Eastern Mojave Desert-Morongo Basin-
Cadiz Basin-San Bernardino County-Upper Colorado River Valley-
Northeast Clark County-Western Clark and Southern Nye County-
Las Vegas Valley-Lake Mead National Recreation Area-
Southern Clark County-
355 AM PDT Fri Mar 13 2020

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of southeast California and
southern Nevada has been cancelled. The heaviest rain has ended
over the watch area. Any additional flooding will minor and
localized.

$$

AZZ001>003-036-131200-
/O.CAN.KVEF.FF.A.0002.000000T0000Z-200314T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts-
Lake Mead National Recreation Area-
355 AM MST Fri Mar 13 2020

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for a portion of northwest Arizona has been
cancelled. The heaviest rain has ended
over the watch area. Any additional flooding will minor and
localized.

$$

Area Forecast Discussion
National Weather Service Las Vegas NV
750 PM PDT Tue Mar 10 2020

.SYNOPSIS...A Flash Flood remain in effect effect for parts of San
Bernardino and all of Inyo County with particular concern across the
southern Owens Valley, Death Valley, and perhaps the Taboose Burn
Scar this evening as the heaviest rain is expected. A brief lull is
expected Wednesday afternoon and night before another round of heavy
rainfall returns to the forecast Thursday into Friday. This second
area of heavy rain looks to be focused across eastern San Bernardino
and southern Mohave Counties. This active pattern is expected to
continue even into next week as yet another low pressure system
looks to impact the region.

&&

.UPDATE...Scattered light to moderate rain has redeveloped over much
of southern Inyo, San Bernardino, Clark and Mohave Counties this
evening with most of widespread moderate to heavy rain east of the
area affecting portions of Arizona. However, showers are starting to
enhance over southern Inyo which are expected to increase and move
north across the county. This could have impacts on mainly the
Georges and Taboose Fire burn scars with the potential of debris
flows and rock slides. The current FF watch for those areas remains
in place and will not make any changes. There could be some isolated
thunderstorms overnight, but latest guidance actually shows less
instability than previous runs. However, thunderstorm chances are
expected to increase Wednesday late morning and afternoon with some
isolated areas of heavy rain. No updates at this time, but rainfall
amounts may be less than expected overnight.

&&

PREV DISCUSSION
225 PM PDT Tue Mar 10 2020

.DISCUSSION...Through and Wednesday night.

The widespread area of light to moderate rain that moved in
overnight did dissipate as it moved north of Las Vegas as hi-res
models suggested. Light rain showers have been isolated more than
scattered so far this afternoon under cloudy skies. There have been
some breaks in the overcast southwest of Las Vegas, not so sure
we will reach the low 60s this afternoon.

Visible imagery starting to show scattered thunderstorms developing
east of the upper low from central California southeast to San
Diego. Model output remains consistent that showers and
thunderstorms associated dynamics within northeast quadrant of upper
low and decreasing instability will expand in coverage across
northwest San Bernardino and Inyo Counties this evening. This area
will shift eastward into Clark County/eastern San Bernardino County
late this evening and overnight. No change made to the Flash Flood
Watch as expecting higher rain rates within Inyo County, more
specifically Death Valley NP. Those higher rain rates may pose a
threat and bring minor flooding to southern Nye, Clark and eastern
San Bernardino Counties early Wednesday morning. Any impacts from
snowfall will be above 8500 feet with 3-5 inches possible in upper
Lee Canyon and Whitney Portal. 1-3 inches possible in upper Bishop
Creek. Similar to today, showers and thunderstorms will become more
isolated Wednesday afternoon and night.

Thursday-Friday...The upper low is progged to finally move into
southern California and eject east into Arizona Friday. This will be
another period of active weather, specifically for San Bernardino,
Mohave and Clark Counties. Dynamics become very impressive within
the lower Colorado River Valley Thursday afternoon with that energy
pivoting northward into our area Thursday night. On our latest
coordination call with WPC there was no change made to the current
Excessive Rain Outlook. Based on GFS and EC ensemble QPF output,
specifically for Needles, Lake Havasu and Kingman confidence has
been increasing in this second round of heavy rain. A Flash Flood
Watch will probably be needed for southern Mohave County and eastern
San Bernardino County, including Morongo Basin late Thursday
afternoon into Friday.

Saturday and Beyond...As this low finally gets out of the southwest
Saturday models continue to advertise the next colder low slowly
approaching from the northwest. Positioning of the trough over the
weekend will lead to increasing southwest winds with some light
showers still lingering over parts of the area. Precipitation
chances increase the first half of next week as the trough moves
overhead. Again, the system is colder so will be expecting some
snowfall at lower elevations.

&&

.HYDROLOGY...regarding the Taboose Burn Scar.
A Flash Flood Watch remains in effect through late tonight. Latest
guidance continues to show the burn area getting at a minimum light
rain, and at a maximum briefly heavy rain this evening. The HRRR
debris flow tool shows up to a half inch rainfall rates at this
time, but only briefly between 7 pm and 10 pm this evening. This
wouldn't quite be enough for significant debris flows most likely,
but could result in some minor issues on the creeks. However,
continued close attention will continue this evening as these rain
rates could overachieve and result in more significant impacts.

&&

.AVIATION...For McCarran...Moderate confidence in forecast details
this afternoon through Wednesday morning as a weather system brings
several rounds of rain with low CIGs and possibly reduced VSBYs to
the area.

Light rain occasionally at or near the airport will remain through
the remainder of the afternoon with CIGS around 3-3.5k feet, but
occasionally dropping to around 2k feet at times. It's possible that
CIGS could raise to around 4-5k feet late this afternoon, but
confidence is low in that occurring.

Rain is likely tonight. Showers should become more numerous after
00Z and eventually become an area of rain pushing in from the south.
Low confidence in current timing of more impactful rain, though
chances increase quickly after 06Z. Between 06Z-12Z, rain may be
heavy enough to reduce visibility and low status to 1000ft. Moderate
confidence that ceilings drop to 3000-5000ft and remain there
through Wednesday morning.

After 12Z, rain may lighten/become more scattered in nature.
Continued with this trend, however it is possible that the heavy to
moderate rain and low ceilings will continue through 15Z or 18Z
Wednesday.

For the rest of southern Nevada, northwest Arizona and southeast
California...A weather system will continue to push into southern
California northeastward into southern Nevada through tonight,
bringing with it widespread aviation impacts. Rain showers near DAG
will continue at times through the day until more substantial rain
moves in after 00Z. This rain shield will continue to push north and
west, with it bringing at least MVFR CIGs, with potentially IFR
ceilings and reduced visibility at times. Slight chance of
precipitation ahead of the bigger push this afternoon, however it
should be lighter precipitation and isolated to scattered in nature.
Rain tonight may be heavy at times across all the TAF sites. Low
confidence in the details of the forecast, including rain timing and
when/how low ceilings will lower.

&&

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

UPDATE...Gorelow
DISCUSSION...Pierce
AVIATION...Gorelow

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