446
FXUS65 KVEF 271227
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
527 AM PDT SUN SEP 27 2026
KEY MESSAGES
* SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE LATE TONIGHT THROUGH
TUESDAY, WITH FAVORABLE CONDITIONS FOR FLASH FLOODING IN NORTHWEST
ARIZONA ON MONDAY AND TUESDAY.
* MILD WEATHER AND WARMING TEMPERATURES ARE EXPECTED DURING THE
SECOND HALF OF THE WEEK.
DISCUSSION
TODAY THROUGH SATURDAY.
THE LATEST INFRARED AND WATER VAPOR SATELLITE IMAGERY SHOW CLOUDS
STREAMING ACROSS THE SOUTHWESTERN US FROM HURRICANE ODALYS. MOISTURE
WILL CONTINUE TO INCREASE ACROSS OUR FORECAST AREA, ESPECIALLY AREAS
SOUTH AND EAST OF I-15, AS HURRICANE POLO CONTINUES TO PULL TROPICAL
MOISTURE FURTHER NORTH. THIS MOISTURE WILL RESULT IN INCREASED CLOUD
COVER TODAY, WITH LOW CHANCES FOR VIRGA AND SPRINKLES ACROSS THE
MOJAVE DESERT THIS AFTERNOON AND EVENING. CHANCES FOR PRECIPITATION
WILL INCREASE ACROSS OUR EASTERN ZONES OVERNIGHT AS AN UPPER-LEVEL
TROUGH BEGINS TO NUDGE INTO THE AREA. PRECIPITATION CHANCES WILL
SPREAD ACROSS THE AREA ON MONDAY AS THIS TROUGH CONTINUES TO PUSH
INTO THE AREA; CHANCES FOR PRECIPITATION WILL CONTINUE INTO TUESDAY
AS THIS LOW CONTINUES TO MOVE THROUGH THE AREA. THE HEAVIEST
PRECIPITATION IS EXPECTED IN THE EASTERN PORTIONS OF OUR FORECAST
AREA WHERE THE TROPICAL MOISTURE WILL OVERLAP WITH THE DYNAMICS FROM
THE TROUGH. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR MOHAVE COUNTY
FROM EARLY MONDAY MORNING THROUGH LATE TUESDAY EVENING, AS THIS IS
WHERE INSTABILITY WILL OVERLAP WITH HIGHER MOISTURE CONTENT.
PRECIPITATION ACROSS THE NORTHWESTERN PORTIONS OF OUR FORECAST AREA
WILL BE LIGHTER, RELYING PRIMARILY ON THE FORCING ASSOCIATED WITH
THE TROUGH ON MONDAY. THIS TROUGH WILL CONTINUE TO PUSH THROUGH THE
AREA ON TUESDAY, RESULTING IN CHANCES FOR SHOWERS AND THUNDERSTORMS
LINGERING INTO TUESDAY AFTERNOON AND EVENING FOR OUR EASTERN ZONES.
THINGS WILL DRY OUT AS THE TROUGH CLEARS OUT OF THE AREA WEDNESDAY
ONWARD. RIDGING WILL SET UP ACROSS THE SOUTHWESTERN US WITH WARMING
TEMPERATURES AND MILD WEATHER EXPECTED DURING THE SECOND HALF OF THE
WEEK.
AVIATION...FOR HARRY REID...FOR THE 12Z FORECAST PACKAGE
GUSTY
SOUTHWESTERLY WINDS EXPECTED THIS AFTERNOON WITH GUST SPEEDS BETWEEN
20 AND 25 KTS. THERE IS A 30 PERCENT CHANCE OF GUSTS TO 30 KTS.
LIGHT SHOWER ACTIVITY EXPECTED ACROSS THE REGION THIS AFTERNOON,
WITH BEST CHANCES OF SHOWERS IN THE VICINITY OF THE TERMINAL BETWEEN
20Z AND 00Z. GUSTS WILL SUBSIDE AFTER SUNSET, BUT SOUTHWESTERLY
WINDS WILL REMAIN ELEVATED BETWEEN 8 AND 10 KTS OVERNIGHT. SCT-BKN
AOA 15 KFT; CIGS DOWN TO 10 KFT WITH SHOWER FORMATION OVERHEAD.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 12Z FORECAST PACKAGE...GUSTY SOUTHWESTERLY
WINDS EXPECTED THIS AFTERNOON ACROSS THE REGION, WITH GUST SPEEDS
GENERALLY BETWEEN 20 AND 30 KTS. LIGHT SHOWER ACTIVITY EXPECTED
ACROSS THE REGION, WITH SHOWERS IN THE VICINITY OF LAS VEGAS VALLEY
TERMINALS MOST LIKELY BETWEEN 20Z AND 00Z... AND IN THE VICINITY OF
COLORADO RIVER VALLEY TERMINALS FROM 20Z THROUGH THE REMAINDER OF
THE TAF PERIOD. SCT-BKN AOA 15 KFT; CIGS DOWN TO 10 KFT WITH SHOWER
FORMATION OVERHEAD.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...STESSMAN
AVIATION...SOULAT
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:
HTTPS://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page