Scientific Forecaster Discussion

NWS Discussion
			
				

Area forecast discussion 
National Weather Service Albuquerque nm 
330 am MDT Wednesday may 22 2013 


Discussion... 
currently...weak ridge extending from northern Sonora along the 
western border of New Mexico will make gradual eastward progress 
through the day today...as weak cold front works into northeast 
New Mexico through this morning and stalls out by early afternoon. 
Upstream...large sprawling closed low over the Pacific northwest 
with circulation expanding to central California and northern 
Nevada...with increases in coverage on tap for the next 24 hours. 


Models...in reasonable agreement through the Holiday weekend and 
into Tuesday night...with differences in upstream pattern 
evolution showing up by midweek through Thursday night. Plausible 
and acceptable consensus shifts ridge squarely over New Mexico 
today and moves it east of the state by late tonight. Circulation 
about Pacific northwest low will work into northern and western 
New Mexico as southwest flow aloft during the day on 
Thursday...and this basic set up will persist pretty much unabated 
through the Memorial Day Holiday into Tuesday. Closed low will 
receive upstream kick from system moving out of the western 
Aleutian chain...and this will bring a shortwave into Arizona late 
Tuesday and into New Mexico Tuesday night. Differences emerging 
from Wednesday Onward...as European model (ecmwf) moves this wave through quickly 
and leaves New Mexico in very weak flow aloft by early Thursday 
morning as closed low continues to spin off Vancouver Island on 
the Canadian West Coast. GFS much more progressive and 
aggressive...digging elongated closed low spanning from the Gulf 
of Alaska into the intermountain region and anchoring gusty trough 
base squarely over New Mexico on Thursday as parent closed low 
shoots through the flow into the northern plains. Differences are 
significant...as New Mexico will be in the calm doldrums per European model (ecmwf) 
or into another late week windbag per GFS. Have split the 
difference and kept unsettled conditions in the forecast for late 
next week and will watch future runs with interest for better 
consensus. 


For today...ridge aloft moving squarely over New Mexico during the 
day today and supporting strong warming trend. Daytime maximum 
temperatures will run 3 to 8 degrees above late may normals. Some 
isolated afternoon thunder possible over the northeast Highlands 
and adjacent plains...especially over Raton ridge...with little 
wetting rain expected. Breezy winds cranking up over the Arizona 
line and eastward to the Continental Divide this afternoon. 
Continued low humidities will produce localized red flag 
conditions in spots through early evening. 


For Thursday...ridge axis shifting east to The Heart of Texas as 
southwest flow in circulation about sprawling closed over the 
Pacific northwest works into New Mexico. Cold front penetrating 
the eastern plains from the north will shift wind directions into 
an easterly component...with resulting up slope flow...moisture 
advection out of the Southern Plains...and afternoon thunderstorm 
activity along the dry line. Storms south and east of a Tucumcari 
to Ruidoso line may become strong through Thursday...as lifted 
indices fall to 4 below...and mu cape pushes up to 1000 j per kg 
over the southeast quadrant of the state. Thursday southwest 
breezes will develop over western and central New Mexico during 
the afternoon...with wind speeds a little lower over the east. 


For Friday...cold front stalled out just inside the eastern border 
of New Mexico...as southwest flow strengthens slowly but steadily 
over the remainder of the state. Dry line will be active in the 
east...with strong thunderstorms possible over the eastern plains 
Friday afternoon. Lifted indices moving lower...down to 7 below in 
spots along the eastern border...as mu cape doubles to nearly 2000 
j per kg in the same spots. With additional moisture in 
play...wetting rains are possible in stronger 
thunderstorms...especially close to the Texas border. Away from 
thunderstorms...southerly breeziness along Interstate 40 will meet 
up with low humidities to produce fire weather issues over the 
western tier. Maximum temperatures running 3 to 8 degrees above 
late may normals. 


For Saturday...southwest flow aloft turning speeds up a notch as 
surface trough deepens from eastern Wyoming and the Nebraska 
Panhandle across eastern New Mexico to roughly El Paso. Southwest 
afternoon breeziness will be pretty common statewide 
Saturday...with strongest winds near the Arizona border and over 
th eastern and northeast plains. Another day of active dry line 
initiation of thunderstorms with lifted indices falling to 6 
below...and mu cape hanging in there around 2000 j per kg. 
Rainfall will run heavier...with good chances for wetting rain 
expanding out of the eastern tier into the remainder of the 
Eastern Plain and foothills of the Central Mountain chain...but 
little chance further west. Maximum temperatures still running a 
few degrees above late may normals. 


Outlook...Sunday through Tuesday...strengthening southwest flow 
aloft in advance of waves propagated by Pacific northwest storm 
system across the southwestern U.S. Most substantial wave slated 
for arrival near The Four Corners by Tuesday afternoon. Eastern 
surface trough becoming better defined through Tuesday...with 
broad areas of breezes near the Arizona line...and over the 
eastern plains...during the day. Breezes will help set up another 
day of critical fire weather conditions over the western and 
central mountains...the northeast Highlands...and adjacent eastern 
plains Sunday afternoon. With trough axis defining dry line 
boundary...eastern plains thunderstorms will shift focus to West 
Texas through Memorial Day to end the convective excitement for 
New Mexico through Tuesday. Very slight warming trend in the 
east...as daytime highs warm to 6 to 12 degrees above late may 
normals....and a more modest 3 to 8 degree positive departure for 
maximum temperatures central and west. 


Shy 


&& 


Fire weather... 
interesting fire weather scenario setting up with areas of critical 
fire weather extreme west today and over a broader area of the 
western and central zones Thursday and Friday. While not slam dunk 
red flag conditions...very dry and very unstable conditions are 
expected with deep mixing. Will maintain the Fire Weather Watch 
for Thursday. By Thursday and Friday and even into Saturday...a much 
more pronounced gradient in surface moisture looks to finally set up 
with possible dry line activity in the eastern plains. 


A nearly stationary upper level low remains over the Pacific 
northwest while short wave ridging builds over The Rockies and an 
associated dry slot is edging in from the west. Thus...warmer today 
all zones with temperatures around 5 to 10 degrees above normal. Single 
digit relative humidity values expected most zones...but southwest winds should 
remain below critical levels. Deep mixing will produce excellent 
ventilation but high Haines of 6 all but the extreme northeast. A 
few hours of critical conditions are possible across the extreme 
west where southwest winds will be strongest. Overnight...relative humidity 
recoveries to be poor central and western zones. A weak eastern 
wind shift into the northeast plains and south winds into the east 
Central Plains will usher in some low level moisture. 


Additional warming on Thursday as the ridge axis moves east of New 
Mexico and the upper level southwest gradient strengthens to our 
west. Continued very dry and unstable with single digit relative humidity and high 
Haines of 6 all but the extreme east and super Haines across the west. 
Have maintained the watch for zones 101...105 and 103 and day shift 
may expand this to include zones 106 and 107. Models disagree on the 
westward extent of moisture across the east...but moisture does 
increase and the dry line looks to set up. 


Friday will be the best day of contrast with breezy south to 
southeast flow into the eastern plains maintaining good low level 
moisture. Decent cape as well and looks to be the best day for 
dry line thunderstorms east. Breezy to windy across the west and 
still very dry with some critical conditions west and central zones 
deep mixing and super Haines as well. 


Upper low still in place Saturday and looks like continued dry west 
and maybe a down tick in activity east but another day of dry line 
storms is possible. Extended models deepen the trough on 
Sunday...GFS a bit more aggressively...with breezy to windy southwest 
winds and drier east. Looks dry all zones into the early work week. 


05 


&& 


Aviation... 
06z taf cycle 
upper level energy has departed east of New 
Mexico...and showers were not able to survive the loss of daytime 
heating. Thus...dry conditions are expected through the overnight 
even into the daytime Wednesday. Breezes will be restrengthening 
again Wednesday afternoon with some gusts to 25 to 30 knots common by 
22/2100utc. 


52 


&& 


Preliminary point temps/pops... 
Farmington...................... 84 48 87 50 / 0 0 0 0 
Dulce........................... 78 37 82 38 / 0 0 0 5 
Cuba............................ 80 42 84 41 / 0 0 0 5 
Gallup.......................... 80 40 81 40 / 0 0 0 0 
El Morro........................ 76 37 78 37 / 0 0 0 0 
Grants.......................... 81 42 83 43 / 0 0 0 0 
Quemado......................... 81 46 82 45 / 0 0 0 0 
Glenwood........................ 85 43 86 44 / 0 0 0 0 
Chama........................... 70 35 75 37 / 0 0 0 5 
Los Alamos...................... 77 52 80 53 / 0 0 0 5 
Pecos........................... 74 51 78 51 / 0 0 5 10 
Cerro/Questa.................... 75 42 78 44 / 5 5 5 5 
Red River....................... 65 36 67 39 / 5 5 10 10 
Angel Fire...................... 69 32 72 35 / 5 5 10 20 
Taos............................ 77 39 80 42 / 5 5 5 5 
Mora............................ 75 46 77 48 / 5 5 10 20 
Espanola........................ 82 49 86 49 / 0 0 0 5 
Santa Fe........................ 79 49 80 51 / 0 0 0 5 
Santa Fe Airport................ 82 48 86 50 / 0 0 0 5 
Albuquerque foothills........... 83 59 87 57 / 0 0 0 0 
Albuquerque heights............. 85 58 89 58 / 0 0 0 0 
Albuquerque valley.............. 86 56 90 55 / 0 0 0 0 
Albuquerque West Mesa........... 85 55 89 55 / 0 0 0 0 
Los Lunas....................... 87 52 91 54 / 0 0 0 0 
Rio Rancho...................... 86 55 89 54 / 0 0 0 0 
Socorro......................... 92 59 96 58 / 0 0 0 0 
Sandia Park/Cedar Crest......... 81 53 85 52 / 0 0 0 5 
Tijeras......................... 82 53 86 53 / 0 0 0 5 
Moriarty/Estancia............... 80 52 84 52 / 0 0 0 5 
Clines Corners.................. 80 51 83 49 / 0 0 5 10 
Gran Quivira.................... 81 54 86 53 / 0 0 0 5 
Carrizozo....................... 85 56 89 54 / 0 0 0 5 
Ruidoso......................... 77 53 80 52 / 0 0 5 10 
Capulin......................... 76 47 72 51 / 10 5 20 30 
Raton........................... 81 43 79 48 / 10 5 20 30 
Springer........................ 82 44 81 49 / 5 5 20 30 
Las Vegas....................... 80 48 81 49 / 0 0 10 20 
Clayton......................... 83 50 76 55 / 5 5 20 40 
Roy............................. 83 50 80 53 / 0 0 20 20 
Conchas......................... 90 54 87 57 / 0 5 10 20 
Santa Rosa...................... 89 57 88 59 / 0 0 10 10 
Tucumcari....................... 92 59 92 63 / 0 5 20 30 
Clovis.......................... 89 57 91 60 / 0 5 20 30 
Portales........................ 90 59 92 63 / 0 5 20 30 
Fort Sumner..................... 92 58 92 61 / 0 5 10 20 
Roswell......................... 95 60 97 64 / 0 5 10 20 
Picacho......................... 90 57 92 57 / 0 0 5 10 
Elk............................. 85 56 87 57 / 0 0 5 10 


&& 


Abq watches/warnings/advisories... 
Fire Weather Watch from Thursday afternoon through Thursday evening 
for the following zones...nmz101-103-105. 


&& 


$$ 


Shy