Area Forecast Discussion
Issued by NWS Charleston, WV

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FXUS61 KRLX 292001
AFDRLX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON WV
239 PM EST THU JAN 29 2015

.SYNOPSIS...
A COLD FRONT ARRIVES PASSES THIS EVENING. UPSLOPE SNOW TONIGHT
INTO FRIDAY. HIGH PRESSURE SATURDAY. ANOTHER LOW PRESSURE SYSTEM
SUNDAY NIGHT AND MONDAY.

&&

.NEAR TERM /THROUGH FRIDAY/...
RAIN...ASSOCIATED WITH WARM FRONT...ALMOST OUT OF NE CWA WITH NICE
DRY SLOT IN PLACE ACROSS CWA. IN FACT...EVEN SEEING SOME SUN
ACROSS SOUTHERN FORECAST AREA AND TEMPS POPPING INTO THE 50S IN
SPOTS. AT 1 PM A COLD FRONT WAS WORKING ITS WAY THROUGH WESTERN
OHIO...AND WILL SLIDE THROUGH OHIO RIVER VALLEY AND APPALACHIANS
LATE THIS AFTERNOON AND THIS EVENING. THIS WILL BRING PRECIP BACK
IN...INITIALLY STARTING AS RAIN...BUT CHANGING OVER TO SNOW
THROUGH THE NIGHT AS COLDER AIR WORKS IN. NW FLOW TAKE OVER LATE
TONIGHT...LINGERING THROUGH FRIDAY. THIS WILL KEEP UPSLOPE SNOW
SHOWERS GOING ACROSS EASTERN LOWLANDS AND MOUNTAINS FOR MUCH OF
THE DAY FRIDAY. MODELS ALSO HINTING AT AN ENHANCED BAND OF
MOISTURE COMING OFF LAKE MICHIGAN FLOWING ACROSS TRI-STATE REGION
THROUGH MID MORNING FRIDAY...SO HELD ONTO POPS THERE LONGER THAN
FARTHER UP THE OHIO RIVER. IN GENERAL...THE LOWLANDS SHOULD SEE
GENERALLY A HALF TO 1.5 INCHES OF NEW SNOW...WITH 3 TO 5 INCHES IN
THE NORTHERN MOUNTAINOUS COUNTIES...AND EVEN A BIT MORE AT HIGHER
ELEVATIONS. WILL ALSO HAVE PRETTY GUSTY WINDS...WITH SOME BLOWING
AND DRIFTING SNOW POSSIBLE ACROSS THE MOUNTAINS. WILL CONTINUE
WINTER WEATHER ADVISORY AS IT IS.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...
WEATHER STARTS OUT DRY...BUT COLD SATURDAY MORNING...AS HIGH
PRESSURE BUILDS INTO THE REGION...CREATING A GRADUALLY CLEARING
SKY...AND CALM CONDITIONS...MAINLY ACROSS THE LOWLANDS. WILL STILL
BE SOME GUSTY CONDITIONS FRIDAY NIGHT...MAINLY ACROSS THE HIGHER
TERRAIN COUNTIES...AS HIGH PRESSURE BUILDS IN...AND 30 TO 40 KT
LLJ.

SOME MODERATION IN TEMPERATURES EXPECTED SATURDAY AFTERNOON...AS
SOUTHERLY FLOW INCREASES OUT AHEAD OF APPROACHING SYSTEM...WHICH
WILL SPREAD PRECIPITATION BACK INTO THE REGION FOR SUNDAY. STILL
SOME UNCERTAINTY IN THE EXACT PATH OF THE STORM...BUT AT THIS
POINT...IT LOOKS LIKE A MOSTLY SNOW SCENARIO...ALTHOUGH SOUTHERN
ZONES WILL SEE A PERIOD OF RAIN OR A RAIN SNOW MIX TO START. SEVERAL
INCHES OF SNOW ARE EXPECTED...PARTICULARLY ACROSS NORTHERN
ZONES...WHERE SNOW IS MORE CERTAIN. WILL CONTINUE TO MAINTAIN
HIGHLIGHT IN THE HWO.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
A SNOW SCENARIO CONTINUES SUNDAY NIGHT INTO EARLY MONDAY AS MODELS
HAVE LOW PRESSURE SLIDING JUST SOUTH OF THE AREA. HOWEVER...IN THE
EASTERLY FLOW THAT SETS UP NORTH OF THE FORECASTED LOW TRACK...WE
WILL HAVE TO WATCH FOR A MODEST WARM WEDGE JUST WEST OF THE
MOUNTAINS SUNDAY EVENING WITH A WEAK INVERTED SURFACE TROUGH JUST
WEST OF THE MOUNTAINS. MOST OF THE MODELS ARE HINTING AT THIS. SO
FOR NOW...WE CONTINUE TO PAINT A RAIN/SNOW MIX OVER THE FAR SOUTH
SUNDAY EVENING...BUT THEN QUICKLY TURN IT ALL TO SNOW AS THE WINDS
TURN NORTHERLY. ELSEWHERE...A GENERAL SNOWFALL IS FORECAST. SNOW
TOTAL ACCUMULATIONS FOR THE ENTIRE EVENT MAY REACH 3 TO 5 INCHES
ACROSS THE NORTH...AND 1 TO 3 INCHES ACROSS THE SOUTH. TEMPERATURES
WILL BE WELL BELOW NORMAL.

DRY AND COLD HIGH PRESSURE BUILDS IN LATER MONDAY INTO TUESDAY WITH
CONTINUED BELOW NORMAL TEMPERATURES.

FOR WEDNESDAY...LOOKS LIKE ANOTHER COLD FRONT WILL PASS
THROUGH...BUT ENOUGH WARMING MAY BE DRAWN NORTHWARD AHEAD OF IT FOR
MOSTLY RAIN SHOWERS. SCATTERED SNOW SHOWERS BEHIND THE FRONT
WEDNESDAY NIGHT TO BE FOLLOWED BY ANOTHER COLD HIGH PRESSURE AGAIN
THURSDAY.

&&

.AVIATION /20Z THURSDAY THROUGH TUESDAY/...
BAND OF MAINLY RAIN SHOWERS MOVING INTO THE MOUNTAINS AS WARM
FRONT PASSES. HAVE SEEN MOSTLY VFR WITH THIS...ALTHOUGH COULD GET
SOME MVFR AT HIGHER ELEVATIONS OUTSIDE OF TAF SITES. WINDS
BEGINNING TO PICK UP IN THE WARM SECTOR...ALONG WITH THE CLOUDS
SCATTERING OUT FOR A BIT. COLD FRONT APPROACHES THIS EVENING
PASSING OVERNIGHT WITH RAIN CHANGING TO SNOW. HAVE MVFR TO IFR
WITH THE SNOW AND REMAINING FAIRLY WINDY. LOWER FLIGHT CONDITIONS
WILL STICK AROUND IN THE EASTERN LOWLANDS AND MOUNTAINS THROUGH
MUCH OF FRIDAY...BUT SHOULD SEE SOME IMPROVEMENTS ACROSS FAR WEST.

FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 18Z FRIDAY...

FORECAST CONFIDENCE: MEDIUM.

ALTERNATE SCENARIO: TIMING OF PRECIPITATION AND LOWER CLOUDS COULD
VARY.

EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY
OF WFO FORECAST TO AVAILABLE MODEL INFORMATION:
H = HIGH:   TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.
M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS.
L = LOW:    TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.

UTC 1HRLY       20   21   22   23   00   01   02   03   04   05   06   07
EST 1HRLY       15   16   17   18   19   20   21   22   23   00   01   02
CRW CONSISTENCY  H    H    H    H    H    H    H    H    H    H    H    H
HTS CONSISTENCY  H    H    H    H    H    H    H    H    H    H    H    H
BKW CONSISTENCY  H    H    H    H    H    H    H    M    H    H    H    H
EKN CONSISTENCY  H    H    H    H    H    H    L    M    M    M    M    M
PKB CONSISTENCY  H    H    H    H    M    H    H    M    M    M    M    H
CKB CONSISTENCY  H    H    H    M    H    H    H    H    H    H    H    H

AFTER 18Z FRIDAY...
IFR CONDITIONS MAY LINGER IN THE MOUNTAINS INTO FRIDAY NIGHT. IFR
CONDITIONS POSSIBLE SUNDAY INTO MONDAY WITH RAIN CHANGING TO SNOW.

&&

.RLX WATCHES/WARNINGS/ADVISORIES...
WV...WINTER WEATHER ADVISORY FROM 9 PM THIS EVENING TO 1 PM EST
     FRIDAY FOR WVZ038-046-047.
OH...NONE.
KY...NONE.
VA...NONE.

&&

$$
SYNOPSIS...JMV/MZ/SL
NEAR TERM...MZ
SHORT TERM...SL
LONG TERM...JMV
AVIATION...MZ










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