Area Forecast Discussion
Issued by NWS Albuquerque, NM

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FXUS65 KABQ 021615 AAB
AFDABQ

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE ALBUQUERQUE NM
915 AM MST MON MAR 2 2015

.UPDATE...
ALLOWED THE FREEZING FOG ADVISORY TO EXPIRE AT 9 AM MST. THE AREA
OF FOG HAS REDUCED AND MAINLY RELEGATED TO AREAS IMMEDIATELY EAST
OF THE CENTRAL MTN CHAIN. SURFACE TEMPERATURES WILL ALSO GRADUALLY
TREND TO NEAR FREEZING IF NOT ABOVE THIS MORNING...ESPECIALLY
ACROSS SOUTHERLY PORTIONS OF THE ADVISORY AREA DUE TO WARM AIR
ADVECTION.

DID LOWER SNOW AMOUNTS FOR TODAY PERIOD. TEMPS ARE RUNNING PRETTY
HIGH AT MOST OF THE SNOTEL SITES. PRETTY HIGH ELEVATION SNOW TODAY
AND WILL BLEED INTO TONIGHT SOME. TRICK WILL BE PLACING THE HIGHER
QPF AMOUNTS SHOWN BY THE MODELS FOR THIS EVENING WITH APPROPRIATE
SNOW LEVELS AND IMPACTS.

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&&

.PREV DISCUSSION...517 AM MST MON MAR 2 2015...
.AVIATION...
12Z TAF CYCLE
SWLY FLOW ALOFT AHEAD OF SHARP UPPER LEVEL LOW PRESSURE TROUGH OVR
CA CONTINUES TO STREAM MID AND HIGH LEVEL MOISTURE AND CLOUDS INTO
NM. WITH THIS UPPER LEVEL FLOW HAVING ENOUGH OF A SOUTHERLY
COMPONENT IT IS DRAGGING UP SOME SUBTROPICAL MOISTURE INTO THE
STATE. A FEW BANDS OF LIGHT RAIN SHOWERS OR DRIZZLE...AND SOME
WET SNOW OCCASIONALLY ABOVE 8500 OR 9000 FEET...WILL CREATE
OCCASIONAL REDUCTIONS IN CIGS/VSBYS INTO THE MVFR CATEGORY THROUGH
THE MID OR LATE MORN ACROSS THE WEST...ALONG WITH OCCASIONAL MT
OBSCURATIONS AND VERY LOCALIZED IFR CIGS VICINITY OF NORTHERN MTS.
BUT THE BIGGER IMPACTS TO CONTINUE EAST FROM THE CENTRAL MT CHAIN
BEHIND A NEARLY STATIONARY BACK DOOR COLD FRONT DRAPED ACROSS
MAINLY THE EAST SLOPES OF CENTRAL MT CHAIN. THIS AREA TO CONTINUE
TO EXPERIENCE IFR TO LIFR CIGS AND MORE LOCALLY VSBYS. LVS...TCC
AND ROW WILL BE THE MOST IMPACTED TAF SITES. MODERATE EAST/SE
WINDS AT SAF THROUGH MID MORNING WITH STILL A BRIEF PERIOD POSS
BELOW TIJERAS CANYON INTO ABQ METRO AREA. PATCHY FREEZING DRIZZLE
IS POSSIBLE BEHIND THE FRONT FROM THE EAST SLOPES OF THE CENTRAL
MT CHAIN EWD. CONDITIONS WILL GRADUALLY IMPROVE AFTER MID TO
LATE MORNING TODAY AHEAD OF THE UPPER TROUGH AND SFC COLD
FRONT...BUT AS BOTH NUDGE CLOSER RAIN SHOWERS AND MT SNOW SHOWERS
TO INCREASE WITH LOWER CIGS AND MORE WIDESPREAD MT OBSCURATIONS
IN MAINLY WEST HALF OF NORTH AND CENTRAL NM LATER THIS AFTERNOON
AND EVENING. EVEN ISOLATED TSRA NOT OUT OF THE QUESTION FOR WEST
THIRD TO HALF OF FCST AREA. CONDITIONS IMPROVE A BIT TOWARD DAWN
TUE.

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&&

.PREV DISCUSSION...334 AM MST MON MAR 2 2015...
.SYNOPSIS...
FREEZING DRIZZLE AND FREEZING FOG OVER EASTERN NEW MEXICO THIS
MORNING WILL GIVE WAY TO A COUPLE RAIN SHOWERS THIS AFTERNOON.
TEMPERATURES WILL BE MILD AGAIN TODAY FOR CENTRAL AND WESTERN NEW
MEXICO AHEAD OF ONE LAST BURST OF WINTER WEATHER TONIGHT. A LARGE
AREA OF RAIN AND HIGH ELEVATION SNOW WILL PROGRESS SLOWLY EAST BY
LATE TODAY AND CHANGE TO ALL SNOW WHILE LOWERING TO VALLEY FLOORS
THROUGH THIS EVENING. WINDS WILL ALSO BE NOTICEABLY STRONGER WITH
BREEZY TO WINDY CONDITIONS FOR CENTRAL AND WESTERN NEW MEXICO.
COLDER AIR WILL FILTER IN TUESDAY BEFORE A REINFORCING SHOT OF
ARCTIC AIR SLIDES IN WEDNESDAY. CONDITIONS WILL BE BLUSTERY WITH
VERY COLD WIND CHILLS. A SLOW WARMING TREND WILL DEVELOP THROUGH
THE END OF THE WEEK.

&&

.DISCUSSION...
AN IMPRESSIVE TAP OF SUBTROPICAL MOISTURE CONTINUES SURGING TO THE
NORTHEAST OVER THE DESERT SW AHEAD OF A QUASI-STATIONARY 547DM H5
UPPER LOW OFF THE SOCAL COASTLINE. A SHALLOW AND VERY MOIST COLD
AIRMASS IN PLACE AT THE SURFACE OVER THE EAST IS RESULTING IN AREAS
OF FZFG/FZDZ BENEATH WARMER AIR ALOFT. WILL CONTINUE THE FREEZING
FOG ADVISORY. THE 09Z WATER VAPOR LOOP SHOWS AN UPPER WAVE RACING
SOUTH ALONG THE WEST COAST WITH A POTENT COLD CORE DRY SLOT. THE
SOCAL LOW WILL BE KICKED EASTWARD AND SHEAR ALONG THE SUBTROPICAL
JET AXIS. NAM CROSS SECTIONS FROM FLAGSTAFF TO ABQ SHOW FRONTOGENESIS
BETWEEN WINSLOW AND GALLUP THROUGH ABOUT 00Z TUESDAY WITH A WELL-
DEFINED LINE OF MODERATE TO LOCALLY HEAVY PRECIP ALONG THE FRONT.
FRONTOLYSIS THEN TAKES SHAPE AS MID AND UPPER LEVEL FORCING IS LOST.
COLD ADVECTION WILL SLIDE EAST WITH THE FRONT AND DROP SNOW LEVELS
QUICKLY TO VALLEY FLOORS. THE BIG CONCERN IS LOSS OF FORCING AS
THE BAND OF PRECIP MOVES EASTWARD SO WILL NOT UPGRADE WINTER STORM
WATCH. THE SAN JUAN/TUSAS RANGE WILL SEE ADDITIONAL WARNING SNOWFALL.
THE IMPACT WINDOW WILL BE FROM 00Z TO 09Z OVER THE NORTHERN MTS.
THIS MAY BE CONSIDERED AN IMPACT-BASED WARNING SINCE BLOWING SNOW
WILL BE MUCH MORE A THREAT THIS GO AROUND THAN THE PAST WEEK. WIND
ADVISORIES WILL ALSO GO IN EFFECT FOR PARTS OF THE WEST TODAY.

TUESDAY WILL TREND COLDER WITH BREEZY AND DRIER WEST WINDS. PRECIP
MAY LINGER OVER THE WEST SLOPES OF THE NORTHERN HIGH TERRAIN AS A
WEAKER WAVE SHIFTS EAST SOUTHEAST OVER THE CENTRAL ROCKIES. THERE
ARE STILL SOME UNCERTAINTIES ON HOW MUCH THIS WAVE MAY SLIDE INTO
OUR AREA WITH THE LARGER TROUGH CARVED OUT OVER SOUTHERN AZ AND
NORTHERN MEXICO. NONETHELESS...THE ARCTIC PLUNGE WILL BE THE MAIN
STORY AS 700MB TEMPS HOVER BETWEEN -8 AND -12C THROUGH WEDNESDAY
MORNING. THE REINFORCING COLD FRONT WILL SLIDE SOUTH AND USHER IN
VERY BLUSTERY CONDITIONS WEDNESDAY WITH BITTER WIND CHILLS ALL
AREAS. HIGH TEMPS WILL AVERAGE 25-35F BELOW NORMAL OVER THE EAST.
SOME UPSLOPE LIGHT SNOWS/FZDZ MAY REDEVELOP IN THE NORTHEAST WITH
THE BACK DOOR FRONT AS WELL. AGAIN CONFIDENCE ON THE OVERALL
SCENARIO IS ONLY MODERATE AT THIS TIME IN THE PRECIP DEPARTMENT
DEPENDING ON HOW THE UPPER PATTERN EVOLVES THRU THURSDAY MORNING.

GUIDANCE DOES INDICATE A SLOW WARMING TREND BY FRIDAY INTO THE
WEEKEND WITH AN UPPER HIGH BUILDING OVER THE WEST COAST. PERIODIC
BACK DOOR FRONTS WILL WAVER TEMPS IN THE EAST...BUT OVERALL MORE
SPRING-LIKE TEMPS WILL IMPACT THE REGION. NO SIGNIFICANT RAIN OR
SNOW CHANCES APPEAR ON THE HORIZON FOR QUITE SOME TIME.

GUYER

&&

.FIRE WEATHER...
THE ACTIVE WEATHER PATTERN WILL PERSIST ACROSS NORTH AND CENTRAL NM
THROUGH AT LEAST TUE NIGHT OR WED...BUT THE BIGGEST IMPACT WITH
WINDS AND PRECIP SHOULD BE THE NEXT 36 HOURS OR SO. NO CRITICAL FIRE
WEATHER CONDITIONS EXPECTED THROUGH THE WEEK.

FOR TODAY MUCH OF THE FORECAST AREA WILL SEE WIND INCREASE
SIGNIFICANTLY LATE MORNING INTO THIS AFTN. SPEEDS WILL BE HIGHEST IN
THE ELEVATED TERRAIN OF WEST CENTRAL NM WHERE SOME GUSTS BETWEEN 40
AND NEARLY 50 MPH WILL BE POSSIBLE. WHILE WINDS THERE AND PERHAPS
EAST THROUGH PORTIONS OF SOCORRO...VALENCIA AND SOUTHERN TORRANCE
COUNTIES WILL BE IN THE CRITICAL RANGE...MIN RH LEVELS SHOULD STAY
FAR ENOUGH ABOVE CRITICAL VALUES TO AVOID RED FLAG CONDITIONS.
SURFACE FLOW WILL BE BRISK INTO TONIGHT AND A LITTLE FARTHER EAST
TUESDAY AS THE PACIFIC FRONT ASSOCIATED WITH THE LOW PUSHES THROUGH
NM...SHIFTING WINDS TO MORE WESTERLY DIRECTION. VENTILATION RATES
WILL BE POOR IN THE EASTERN TIER OF NM TODAY AND GOOD TO EXCELLENT
MOST AREAS WEST FROM THE CENTRAL MTN CHAIN. VENT RATES TO BE GOOD TO
EXCELLENT...MAINLY THE LATTER...ACROSS ROUGHLY 97 PERCENT OF THE
AREA TUESDAY THEN COMING DOWN A BIT WEST HALF TO TWO THIRDS
WED...MORE SO FARTHER EAST. THEREAFTER INTO THE WEEKEND RATES WILL
BE MUCH LOWER...GENERALLY POOR TO FAIR MOST AREAS.

PRECIPITATION WILL RAMP UP SOME LATER TODAY MAINLY WEST...WEST AND
SOMEWHAT CENTRAL TONIGHT. SOME PERIODIC SNOW WILL IMPACT THE
NORTHERN MOUNTAINS...NAMELY THE SAN JUAN/TUSAS RANGE NEAR THE CO/NM
BORDER...BEFORE THE INCREASE ELSEWHERE. SNOW LEVELS WILL LIKELY BE
AT THEIR HIGHEST TODAY BEFORE LOWERING QUICKLY LATE THIS AFTN AND
EVEN...FALLING FROM BETWEEN 8500 TO 9000 FEET NORTH...HIGHER
ELSEWHERE...TO THE SFC MOST OF THE NORTH AND WEST CENTRAL THIS EVE.
INTO TUESDAY AND WEDNESDAY THE NORTHERN MOUNTAINS WILL REMAIN
FAVORED FOR LARGE SNOWFALL ACCUMULATIONS. ADDITIONAL MORE MODEST
PRECIP POTENTIAL POSS IN A COUPLE WAVES TUE MAINLY NW AND N CENTRAL
NM AND WED NORTH CENTRAL AND EAST.

43

&&

.ABQ WATCHES/WARNINGS/ADVISORIES...
WINTER STORM WATCH FROM 5 PM MST THIS AFTERNOON THROUGH TUESDAY
AFTERNOON FOR THE FOLLOWING ZONES...NMZ511>515.

WIND ADVISORY UNTIL 5 PM MST THIS AFTERNOON FOR THE FOLLOWING
ZONES...NMZ502-505-506-508.

WINTER STORM WARNING UNTIL 5 PM MST TUESDAY FOR THE FOLLOWING
ZONES...NMZ510.

&&

$$

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