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Monday Mauler or Monday Bawler? part II


DDweatherman

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000

FXUS61 KLWX 022042

AFDLWX

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

342 PM EST SUN FEB 2 2014

.SYNOPSIS...

A COLD FRONT ACROSS THE OHIO VALLEY WILL MOVE THROUGH THE AREA

LATE TODAY AND TONIGHT. A WAVE OF LOW PRESSURE MOVING ALONG THIS

FRONT WILL SPREAD PRECIPITATION OVER THE AREA TONIGHT AND MONDAY.

HIGH PRESSURE WILL BRIEFLY BUILD INTO THE AREA MONDAY NIGHT AND

TUESDAY BEFORE ANOTHER LOW PRESSURE AFFECTS THE AREA ON WEDNESDAY.

HIGH PRESSURE RETURNS FOR THE END OF THE WEEK.

&&

.NEAR TERM /THROUGH MONDAY/...

CDFNT INVOF I-95 AT 19Z. TEMPS SE OF FNT HV SPIKED...INTO THE

MID-UPR 60S. EVIDENTLY...THE SFC INVSN HAS MIXED OUT IN CENTRL VA.

MEANWHILE...TEMPS W OF THE APLCNS IN THE 40S.

LTST 12Z GDNC...SPCLY NAM12...HAS INITIALIZED TOO COLD. THAT WL

GREATLY IMPACT PTYPE FCSTS TNGT-TMRW. IN THE SYNOPTIC SCALE THERE/S

GOOD AGREEMENT. LOPRES INVOF THE GLFMEX CST WL TRACK NEWD TNGT ALONG

THE FNT AND PASS OFF THE NC CST TMRW. THE PATH OF THE H8 LOW

DISPLACED N OF THE SFC FEATURE. THAT WL PREVENT MUCH COLD AIR FM

DRAINING SWD TIL THE MSTR LEAVES...NOT TO MENTION THE WARM START

THAT EVERYBODY WL GET OFF TO. SO...XPCT PCPN TO START AS RA JUST ABT

EVERYWHERE...XCPT PERHAPS THE ALLEGHENY FNT. BUT...AN UPR JET MAX WL

BE ARND TO PROVIDE ADDED LIFT OVNGT...MORE OR LESS IN THE SAME TIME

FRAME AS PVA ARRIVES. CWFA WL BE IN LFQ. SUBSEQUENTLY SUSPECT THERE

WL BE DYNAMIC COOLING IN THE PTMC HIGHLANDS AND ACRS NRN MD...TO

SUPPORT A TRANSITION TO SNW. TEMPS WL BE MARGINAL S OF THERE...AND

XPCT A TIGHT THERMAL GRADIENT. FURTHER...THERES LTL REASON TO

BELIEVE THAT TEMPS WL CHG MUCH DURING THE DAY ON MON...SO PTYPE WL

REMAIN SIMLR THRUT THE EVENT.

LIKE PRVS FCST CYCLES...IT/S LOOKING LIKE THE NRN CWFA WL BE THE

OVERLAP BTWN COLD AIR AND QPF. THE RA/SN LINE WL BE DRAPED SOMEWHERE

ACRS METRO BALT/DC...NRN FOOTHILLS...AND CENTRL VLY. THERE/S STILL

WIGGLE ROOM IN EXACTLY WHERE THAT WL WIND UP. BUT BASED ON 12Z

GDNC/ANALYSIS...THERE IS A SUFFICIENT OVERLAP TO JUSTIFY UPGRADING

THE WINTER STORM WATCH TO A WRNG. THE STRIPE OF ADVY ADJACENT TO

THAT WL BE THIN...FM BALT CITY...ACRS NWRN BURBS OF DC...TO CENTRL

SHEN VLY. FOR LOUDOUN AND MONTGOMERY CO SPECIFICALLY...SOLNS CUD

YIELD JUST RA TO WRNG SNW W/IN THE CNTY ALONE.

SINCE TEMPS WL BE BARELY BLO FRZG...AND IN SOME CASES JUST ABV...

RATIOS MAY BE LESS THAN A 10-1. BUT...QPF JUICY /ARND AN IN INCH

LIQ/...SO SNW TTLS IN THE PTMC HIGHLNDS AND CATOCTINS MAY BE ARND

6-9 INCHES.

ONCE THE LOW DEPARTS THE CST /ELY-MID AFTN/...THE CAA BEGINS IN

EARNEST. BY THAT PT...THE BULK OF THE MSTR WL BE OUT OF HERE. MAY

EVEN HV SOME CLRG IN THE FAR NW PRIOR TO SUNSET.

 

Where have I heard that one  :rolleyes:

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I think you and I might be sitting in a good spot for this one. Will be interesting to see where the best banding sets up. I know looking at the 300 mb, a good portion of Central MD up to York/Lancaster will sit right between the split jet maxima. Someone is going to get pasted tomorrow with 6-10" of snow between that zone

Is your area ever not sitting in a good spot?

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leesburg 04, on 02 Feb 2014 - 4:06 PM, said:leesburg 04, on 02 Feb 2014 - 4:06 PM, said:

This is really disappointing...what a disaster. 2-5" what a waste of my time ...next!!

 

I'd love to have that.. let's trade. Haven't had a storm with over 2" yet this season!

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RGEM is slower with the 850 line IMBY and it pretty much straddles Arl/Alex/DC from 10A to 1P.  Definitely a bit warmer than the NAM.  Also cut back a bit on precip totals from 12z here.  Worse than 12z overall I'd say.

12Z wasn't that good so not sure why some were hugging it. We used to always toss RGEM/GGEM temps but that seems to have changed this winter; I thought they had known biases in that regard.

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