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afdabq

Area forecast discussion...updated
National Weather Service Albuquerque nm
1142 PM MDT sun Jul 21 2019

Aviation...
06z taf cycle
active weather will continue overnight with gusty winds impacting
several areas and additional rounds of showers, thunderstorms, and
even low ceilings in portions of eastern New Mexico. Low clouds
could linger into the afternoon in portions of eastern New Mexico
with some MVFR ceilings possibly being stubborn to erode away.
Additional rounds of thunderstorms will redevelop in the afternoon,
primarily over the Continental Divide of western New Mexico and the
northern mountains. A late round of storms is also possible in
southeastern parts of the state towards krow late Monday afternoon
and evening. Storms will have more moisture to work with, leading to
heavier downpours and reduced ceilings/visibilities during rain.
Gusty downburst winds, small hail, and lightning will also be
possible.

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Previous discussion...336 PM MDT sun Jul 21 2019...
synopsis...
evening and overnight showers and thunderstorms will focus primarily
on eastern New Mexico with a few of the storms across northeast
parts of the state reaching strong to severe strength. Another,
stronger, cold front dropping in from southeast Colorado after
midnight will set off another round of storms for the plains after
midnight mainly north of Interstate-40. The front will push west into
central and western areas of the state during Monday morning. Strong
East Canyon winds are likely in the Albuquerque Metro areas Monday
morning, especially downwind of Tijeras Canyon. The strong winds will
provide the necessary moisture for scattered to numerous showers and
storms Monday afternoon and evening, locally. Daily rounds of
afternoon and evening showers and thunderstorms will continue through
the work week.

&&

Discussion...
scattered thunderstorms firing along the east slopes of the Central
Mountain chain this afternoon, gradually propagating to the southeast
across northeast and east-central nm while storms over Lincoln County
aren't moving much. Rain cooled-air in eastern nm will send a strong
boundary westward this evening, sending higher dewpoint temperature/precipitable water
air westward to the Arizona line by early morning.

Meanwhile, another backdoor cold front will drop into eastern nm
after midnight, helping to keep a strong and moist east and southeast
low-level flow across nm Monday. Higher resolution models and in
particular, the 18z href show scattered to numerous storms Monday
afternoon firing over the northern mountains and over the far west-
central and Southwest Mountains where the backdoor front is progged
to be located. In fact, the 18z href has a line of storms developing
over the west side of abq and Rio Rancho where the east and southeast
winds start to rise along the volcanoes/west side of the Rio Grande
rift. Most activity Monday afternoon will be in an arc from the
Southwest Mountains north over the west-central mountains and then
northeast over the northern mountains to the northeast Highlands.
Southeast winds will howl most areas west of the Central Mountain
chain with storm steering level flow east to northeasterly east of
the Continental Divide and northwesterly west of The Divide. Strong
to perhaps a severe storm or two is possible over west-central and
northwest nm along/just behind the front given the progged cape and
bulk sheer values. Thought about a Flash Flood Watch for The Divide
Monday afternoon and evening but the 18z models have shifted the area
of heaviest precip a bit farther west. Will let the mid shift take
one more look at the potential for a Flash Flood Watch.

Model trend for Tuesday is to be a bit more stable with the relatively
cool low-level easterly flow. Favored areas for afternoon convection
on Tuesday will be over the northern and Southwest Mountains with
steering winds out of the east and northeast sending storms over the
northwest plateau during the evening. Similar scenario is expected
Wednesday with perhaps more of a northerly steering component
bringing storms off the jemez and into the middle rgv and east
mountains.

By Thursday, GFS and ecwmf shifts the upper high southwestward over
east-central Arizona. This allows slightly stronger northwest to northerly flow
aloft to move over southern Colorado and northern nm Thursday through next
weekend. That typically results in a very active period for much of
northern and central nm.

33

&&

Fire weather...
burn scar flash flooding will be the main concern this week. A moist
backdoor cold front will bring a significant increase in slow-moving
thunderstorm coverage Monday into Tuesday. Locally strong gap winds
will mark the arrival of the front between midnight and dawn Monday
along the Rio Grande Valley. The front will likely push west of The
Divide before stalling late Monday afternoon. Storm motions will
generally be very slowly toward the south or southeast as high
pressure aloft recenters northwest of The Four Corners. In addition
to the sangres and adjacent east slopes, areas from west-central to
northwest nm will be especially favored with up to 2+ inches in
localized areas Monday afternoon/evening. Wetting footprints should
have their greatest coverage for the middle/lower Rio Grande Valley
and adjacent locales Monday night into Tuesday am. Storm coverage
may trend downward a bit for Tuesday PM, but an active pattern is
expected. Daytime temperatures will trend below average most areas
Monday and areawide Tuesday before gradually rebounding mid to late
week. Moisture recycling will maintain a good chance of thunderstorms
for western/northern areas mid to late week. Kj

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