898
FXUS65 KVEF 270927
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
227 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
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 06Z FORECAST PACKAGE
LIGHT
SOUTHWESTERLY WINDS WITH SPEEDS UNDER 10 KNOTS WILL CONTINUE
OVERNIGHT INTO SUNDAY MORNING. SOUTHWESTERLY GUSTS BETWEEN 20 AND 25
KNOTS WILL RETURN LATE IN THE MORNING (17Z TO 19Z) AND CONTINUE
THROUGH THE AFTERNOON. THERE IS A LOW CHANCE (10 TO 15 PERCENT) OF A
BRIEF PERIOD OF SOUTHEAST WINDS BETWEEN 16Z AND 19Z, ALTHOUGH SPEEDS
SHOULD MAINLY BE 10 KNOTS OR LESS IF THIS WERE TO OCCUR. MID- AND
HIGH-LEVEL CLOUDS WILL INCREASE OVERNIGHT, BUT BASES WILL REMAIN AOA
15KFT AGL INTO SUNDAY NIGHT.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 06Z FORECAST PACKAGE...LIGHT WINDS WILL PERSIST
OVERNIGHT ACROSS MUCH OF THE REGION. THE EXCEPTION WILL BE ACROSS
THE WESTERN MOJAVE DESERT, WHERE BREEZY WESTERLY WINDS OF 12 TO 16
KNOTS WILL PERSIST WELL INTO THE NIGHT. GUSTY SOUTHERLY TO
SOUTHWESTERLY WINDS RETURN AREAWIDE LATE TOMORROW MORNING AND
AFTERNOON. MID- AND HIGH-LEVEL CLOUD COVER WILL INCREASE OVERNIGHT
AND SUNDAY, ESPECIALLY IN THE SOUTHERN MOJAVE DESERT AND
NORTHWESTERN ARIZONA. VCSH HAS ALSO BEEN ADDED TO THE KEED TAF AFTER
27/2000Z AND TO THE KIFP TAF AFTER 28/0200Z.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...STESSMAN
AVIATION...PLANZ
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