Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 300908 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 508 AM EDT WED JUL 30 2014 .SYNOPSIS... UPPER LEVEL LOW PRESSURE OVER EASTERN ONTARIO CONTINUES TO SPIN COOL AIR INTO THE MID ATLANTIC. THIS WILL GRADUALLY RECEDE AS THE WEEK PROGRESSES. A COASTAL FRONT WILL DEVELOP THIS WEEKEND AND LAST INTO EARLY NEXT WEEK. && .NEAR TERM /TODAY/... IAD BROKE THEIR RECORD LOW FOR TDA AT 5 AM W/ A READING OF 50. BWI HAS TIED THEIR RECORD OF 56. PRVS DSCN... WELL..IF YOU HV TO BE AWAKE OVRNGT AT THE END OF JUL THIS IS THE WAY TO DO IT - GNRLY CLR SKIES W/ TEMPS MORE LK LATE SEP THAN LATE JUL. THE 2 AM TEMP ROUND UP SHOWS TEMPS IN THE LM60S IN THE CITIES AND ALONG THE WATER...BUT DROPPING INTO THE LM50S W OF I-95. THIS COURTESY OF THE WRN RDG/ERN TROF WHICH HAS RMND FAIRLY STATIONARY FOR THE PAST WK. ON THE OTHER SIDE OF THE COUNTRY PHX WAS READING 100 DEGS AT 11 PM THEIR TIME. THE TUE HIGHS WERE ALL IN THE 70S! AGN ALL IN LN W/ THE LATTER HALF OF SEPT. XPCT W/ LGT WINDS TDA THIS WL ALLOW FOR SOME SFC WARMING SO XPCT TO SEE HIGHS IN THE L80S E OF THE BLU RDG..70S W. MDLS ARE IMPLYING SOME INSTABILITY LATE THIS AFTN...BUT RATHER THAN TALKING ABT A TSTM OUTBRK IT LOOKS MORE LK RW FORMING OVR THE ERN GRT LKS DURG MID AFTN AND THEN TRACKING SE. HV SOME LOW END POPS W OF THE BLU RDG LATE THIS AFTN/THIS EVE. && .SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/... ANY RW SHOULD DIE OUT DURG THE EVE..THEN AGN NO PROBS TNGT. LOWS IN THE 50S OUTSIDE OF THE CITIES/ALONG THE WATER. TEMP MODIFICATION OF THE AIR MASS SHOULD BEGIN ON THUR - THE FINAL DAY OF JUL..BUT STILL HIGHS SHOULD STILL BE SLTLY BLO CLIMO NORMS - IN THE M80S. LOWS THU NGT IN THE LM60S AWAY FM THE CITIES. NO ORGANIZED CVCTN FORESEEN THRU THU NGT...PSBLY ISOLD TSTMS OVR THE MTNS THU AFTN. WINDS FIELDS LOOK TO BE LGT SO ANYTHING THAT WOULD GO UP WOULD PRBLY QUICKLY COME DOWN. && .LONG TERM /FRIDAY THROUGH TUESDAY/... THE WKND FCST WL FEATURE HIPRES IN THE WRN ATLC AND A TROF AXIS ACRS THE GRTLKS/MS RVR VLY. CWFA WL BE W/IN ZONE OF POS ADVCTN...BOTH TEMPS AND DEWPTS. FLOW WL STILL BE LGT...THX TO INFLUENCE OF LLVL RDGG...BUT WL HV ORIGINS FM BOTH GLFMEX AND ATLC SOURCES. DONT THINK THERE WL BE TOO MUCH INSTBY ARND FRI. BOTH WKND DAYS WL BE BETTER. CONTD POPS FOR ALL THREE...W/ DIURNAL THUNDER EMPHASIS. UPR TROF WL FLATTEN ELY NXT WK. AS HGTS RISE...PTTN WL RETURN TO SOMETHING MORE TYPICAL FOR AUG...THO STILL A LTL COOLER THAN NRML. && .AVIATION /09Z WEDNESDAY THROUGH SUNDAY/... VFR CONDS XPCTD TDA THRU THU NGT. VFR WL PREVAIL FOR A MAJORITY OF THE TIME FRI-SUN...THO FLGT RESTRICTIONS LKLY INVOF SCT SHRA/TSRA. && .MARINE... NO PROBS FORESEEN ON THE WATERS IN NEXT 48 HRS. SELY WNDS FRI-SUN AS AIR CIRCULATES ARND LRG HIPRES IN THE WRN ATLC. RDG CLOSE ENUF THAT SPDS SHUD BE AOB 10 KT. MAY HV A FEW STORMS. LTNG BIGGEST THREAT. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && $$ PRODUCTS...WOODY!/HTS

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