Frost Advisory 8, NWS Blacksburg, VA

Alleghany County, NC, Ashe County, NC, Watauga County, NC, Alleghany County, VA, Bath County, VA, Bland County, VA, Carroll County, VA, City of Covington, VA, City of Galax, VA, City of Radford, VA, Craig County, VA, Floyd County, VA, Giles County, VA, Grayson County, VA, Montgomery County, VA, Pulaski County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Mercer County, WV, Monroe County, WV, Summers County, WV

423 
WWUS71 KRNK 240129
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URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
929 PM EDT SUN SEP 23 2012

...FROST IS EXPECTED TO DEVELOP LATE TONIGHT IN VALLEYS AND DRAINAGES
ACROSS THE MOUNTAINS...

.CANADIAN HIGH PRESSURE BUILDS IN OVERNIGHT. LIGHT WINDS AND
MOSTLY CLEAR SKIES WILL ALLOW TEMPERATURES IN RIVER VALLEYS AND
DRAINAGES ACROSS THE MOUNTAINS TO FALL INTO THE MID TO UPPER
30S...SETTING UP THE POSSIBILITY FOR PATCHY FROST IN THESE AREAS.

NCZ001-002-018-VAZ007-009>020-WVZ042>045-240930-
/O.CON.KRNK.FR.Y.0008.120924T0500Z-120924T1300Z/
ASHE-ALLEGHANY NC-WATAUGA-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-
PULASKI-MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-
MERCER-SUMMERS-MONROE-GREENBRIER-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
TAZEWELL...MARION...BLAND...PEARISBURG...WYTHEVILLE...RADFORD...
PULASKI...BLACKSBURG...INDEPENDENCE...WHITETOP...TROUTDALE...
VOLNEY...GALAX...FLOYD...NEW CASTLE...CLIFTON FORGE...COVINGTON...
HOT SPRINGS...BLUEFIELD...FLAT TOP...HINTON...HIX...UNION...
LEWISBURG...QUINWOOD...DUO...RAINELLE
929 PM EDT SUN SEP 23 2012

...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM EDT
MONDAY...

* LOCATIONS...VALLEYS AND DRAINAGES ACROSS THE MOUNTAINS.

* TEMPERATURES...FALLING INTO THE MID TO UPPER 30S.

* TIMING...BETWEEN THE HOURS OF 2 AM AND 9 AM ON MONDAY.

* IMPACTS...SENSITIVE VEGETATION MAY BE SEVERELY DAMAGED OR 
  KILLED BY PATCHY FROST IF NOT PROTECTED OR MOVED INDOORS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

981 
WWUS71 KRNK 240714
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URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
314 AM EDT MON SEP 24 2012

...FROST ACROSS THE VALLEYS EARLY THIS MORNING...

.EARLY MORNING TEMPERATURES IN THE LOWER TO MID 30S WILL RESULT IN
FROST ESPECIALLY ACROSS THE DEEPER MOUNTAIN VALLEYS. 

NCZ001-002-018-VAZ007-009>020-WVZ042>045-241300-
/O.CON.KRNK.FR.Y.0008.000000T0000Z-120924T1300Z/
ASHE-ALLEGHANY NC-WATAUGA-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-
PULASKI-MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-
MERCER-SUMMERS-MONROE-GREENBRIER-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
TAZEWELL...MARION...BLAND...PEARISBURG...WYTHEVILLE...RADFORD...
PULASKI...BLACKSBURG...INDEPENDENCE...WHITETOP...TROUTDALE...
VOLNEY...GALAX...FLOYD...NEW CASTLE...CLIFTON FORGE...COVINGTON...
HOT SPRINGS...BLUEFIELD...FLAT TOP...HINTON...HIX...UNION...
LEWISBURG...QUINWOOD...DUO...RAINELLE
314 AM EDT MON SEP 24 2012

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING...

* LOCATIONS...VALLEYS.

* TEMPERATURES...LOWER AND MID 30S.

* TIMING...THROUGH 9 AM MONDAY.

* IMPACTS...SENSITIVE VEGETATION MAY BE SEVERELY DAMAGED OR 
  KILLED BY PATCHY FROST IF NOT PROTECTED OR MOVED INDOORS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

394 
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URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
859 AM EDT MON SEP 24 2012

...THE FROST ADVISORY HAS BEEN CANCELLED...

NCZ001-002-018-VAZ007-009>020-WVZ042>045-241400-
/O.CAN.KRNK.FR.Y.0008.000000T0000Z-120924T1300Z/
ASHE-ALLEGHANY NC-WATAUGA-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-
PULASKI-MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-
MERCER-SUMMERS-MONROE-GREENBRIER-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
TAZEWELL...MARION...BLAND...PEARISBURG...WYTHEVILLE...RADFORD...
PULASKI...BLACKSBURG...INDEPENDENCE...WHITETOP...TROUTDALE...
VOLNEY...GALAX...FLOYD...NEW CASTLE...CLIFTON FORGE...COVINGTON...
HOT SPRINGS...BLUEFIELD...FLAT TOP...HINTON...HIX...UNION...
LEWISBURG...QUINWOOD...DUO...RAINELLE
859 AM EDT MON SEP 24 2012

...FROST ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS CANCELLED THE
FROST ADVISORY.

WITH SUNNY SKIES ACROSS THE AREA THIS MORNING...TEMPERATURES WILL
WARM QUICKLY...ENDING THE THREAT OF FROST FOR THE DAY.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
1014 AM EDT SUN SEP 23 2012

.SYNOPSIS...
HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE AREA TODAY AND
TONIGHT BRINGING COOLER AND DRIER WEATHER THROUGH MONDAY. A COLD
FRONT WILL APPROACH THE AREA TUESDAY AND TUESDAY NIGHT BEFORE
STALLING OUT ACROSS THE MID ATLANTIC REGION ON WEDNESDAY.

&&

.NEAR TERM /THROUGH TONIGHT/...
AS OF 1000 AM EDT SUNDAY...

THE EARLY MORNING FORECAST PACKAGE APPEARS TO BE IN GOOD SHAPE
THIS MORNING...AND THEREFORE NO CHANGES ARE NEEDED. STILL AWAITING
THE ARRIVAL OF THE LATEST ROUND OF MODEL GUIDANCE BEFORE DECIDING
WHERE A FROST ADVISORY WILL BE NEEDED FOR TONIGHT. FURTHER DETAILS
TO FOLLOW SHORTLY...

AS OF 645 AM EDT SUNDAY...

COLD FRONT CONTINUES TO PUSH TO THE EAST OF THE AREA EARLY THIS
MORNING WITH DRY/COOL ADVECTION TO PREVAIL TODAY AS HIGH PRESSURE TO
THE WEST BUILDS SLOWLY EAST. MAY STILL HAVE SOME LOW/MID CLOUDS ACROSS
THE FAR NW AND SE EARLY ON...OTRW EXPECTING A PLEASANT EARLY FALL
DAY UNDER ABUNDANT SUNSHINE...COMFORTABLE DEWPOINTS AND A DECENT NW
BREEZE. GRADUAL 85H COOLING TO ABOUT +6C MOUNTAINS SHOULD KEEP HIGH
TEMPS IN THE 58-64 RANGE WEST...WITH SLIGHTLY WARMER TEMPS ALOFT
AND HEATING OF DRY AIR PUSHING HIGHS OUT EAST TO AROUND 70.

MAIN CONCERN TONIGHT WITH FROST POTENTIAL IN THE VALLEYS GIVEN THE
SFC HIGH SLIDING OVERTOP THE WESTERN ZONES LATE ALLOWING WINDS TO GO
LIGHT WHILE DEWPOINTS REMAIN LOW. MODELS SUGGEST THAT A FINAL MID
LEVEL S/W WILL WORK AROUND THE BASE OF THE 5H TROF CROSSING THE
REGION OVERNIGHT AND PERHAPS SCRAPE THE NW ZONES AFTER MIDNIGHT PER
LATEST NAM. THIS MAY LEAD TO A PERIOD OF STRATO-CU/MID DECK NW
WHICH COULD LIMIT RAD COOLING JUST LONG ENOUGH TO INHIBIT MORE
WIDESPREAD FROST SE WVA/VA HIGHLANDS. HOWEVER THIS IFFY AND BASED
ON LATEST MOS HAVE TWEAKED DOWN LOWS IN THE DEEPER VALLEYS WITH AT
LEAST MORE PATCHY FROST POTENTIAL ESPCLY GREENBRIER VALLEY TO
BURKES GARDEN...INTO THE HIGH MOUNTAIN VALLEYS OF NW NC. DAY SHIFT
MAY NEED TO HOIST AN ADVISORY ESPCLY GIVEN CURRENT CHILLY TEMPS
THIS MORNING AND IF COOP MOS VALLEYS CONTINUE TO TREND LOWER.
HOWEVER FOR NOW PLAN TO JUST KEEP MENTION IN THE HWO GIVEN RATHER
WARM/MOIST SOIL CONDITIONS AND BRIEF NATURE OF ANY FROST...AS
VALUES LOOK TO TANK FOR AN HOUR OR TWO RIGHT AT DAYBREAK. OTRW
MAINLY CLEAR AND CHILLY UNDER HIGH PRESSURE WITH OVERALL LOWS
33-40 WEST AND LOW/MID 40S EAST WHERE LIGHT MIXING MAY HANG ON
UNTIL ALMOST DAWN.

&&

.SHORT TERM /MONDAY THROUGH WEDNESDAY NIGHT/...
AS OF 320 AM EDT SUNDAY...

THE CENTER OF HIGH PRESSURE WILL SLOWLY HEAD EASTWARD MONDAY INTO
MONDAY NIGHT. WHILE TEMPERATURES WILL STILL BE ON THE COOL SIDE FOR
THIS TIME OF THE YEAR...A BIT MORE SOUTHERLY FLOW MONDAY NIGHT WILL
HELP KEEP TEMPERATURES FROM FALLING AS MUCH AS COMPARED TO WHAT IS
EXPECTED TONIGHT.

FOR TUESDAY INTO TUESDAY NIGHT...A COLD FRONT WILL MOVE INTO THE
OHIO VALLEY AND STALL. AT THIS TIME...ASSOCIATED PRECIPITATION
ACROSS OUR AREA LOOKS TO BE LIMITED TO ISOLATED SHOWERS ACROSS SE WV
AND PORTIONS AND NEAR THE I-64 CORRIDOR OF SW VA. BY WEDNESDAY INTO
WEDNESDAY NIGHT...THERE WILL BE A SMALL PROGRESS SOUTHWARD OF THE
FRONT...AND A BIT MORE INSTABILITY AS A WAVE MOVES ALONG IT. EXPECT
ISOLATED TO SCATTERED COVER ACROSS THE NORTHERN HALF OF THE FORECAST
AREA WITH THE BEST COVERAGE ACROSS SE WV. ISOLATED THUNDERSTORMS
WILL BE POSSIBLE WEDNESDAY AFTERNOON. TEMPERATURES WILL TREND
PROGRESSIVELY MILDER TUESDAY INTO WEDNESDAY AS SOUTHWEST FLOW IN
ADVANCE OF THE FRONT DOMINATES.

&&

.LONG TERM /THURSDAY THROUGH SATURDAY/...
AS OF 345 PM EDT SATURDAY...

500 MB PATTERN TRANSITIONS FROM AN AMPLIFIED TROF OVER THE EAST ON
TUESDAY TO MORE ZONAL FLOW BY FRIDAY. THE MAIN SURFACE HIGH IS
OFFSHORE WEDNESDAY WITH THE RIDGE AXIS OVER THE SOUTHERN
APPALACHIANS. ON THURSDAY A COLD FRONT CROSSES THROUGH THE REGION.
HIGH PRESSURE THAT BUILDS IN BEHIND THE FRONT OVER THE NORTHEAST
UNITED STATES WILL WEDGE DOWN THE APPALACHIANS FRIDAY AND SATURDAY.
LOW LEVEL EASTERLY FLOW WITH THE WEDGE WILL KEEP TEMPERATURES
SLIGHTLY BELOW NORMAL.

&&

.AVIATION /14Z SUNDAY THROUGH THURSDAY/...
AS OF 650 AM EDT SUNDAY...

SURFACE HIGH BUILDS EAST INTO THE AREA TODAY WITH WIDESPREAD VFR
EXPECTED UNDER NW WINDS AVERAGING AROUND 10 KTS. IMPULSE PASSING
BY TO THE NW THIS EVENING AND EARLY TONIGHT COULD SPILL A PERIOD
OF VFR CIGS SOUTH INTO KLWB/KBLF THRU MIDNIGHT SO ADDED AT LEAST A
SCTD STRATO-CU LAYER THERE...AND FEW MORE CLOUDS TO THE SOUTH.
SKIES SHOULD THEN CLEAR AGAIN OVERNIGHT WITH CONTINUED VFR UNDER
LIGHT WINDS INTO EARLY MONDAY.

HIGH PRESSURE WILL CONTROL THE WEATHER PATTERN MONDAY INTO TUESDAY
RESULTING IN CONTINUED VFR OUTSIDE OF EARLY MORNING PATCHY FOG.
A COLD FRONT WILL APPROACH THE REGION LATE WEDNESDAY BRINGING
SCATTERED SHOWERS. THE BOUNDARY MAY HANG AROUND THE REGION INTO
THURSDAY...WITH BRIEF MVFR CONDITIONS RESULTING FROM THE SHOWER
ACTIVITY.

&&

.RNK WATCHES/WARNINGS/ADVISORIES...
VA...NONE.
NC...NONE.
WV...NONE.

&&

SYNOPSIS...JH
NEAR TERM...JH/NF
SHORT TERM...DS
LONG TERM...AMS
AVIATION...CF/JH/NF

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
142 PM EDT SUN SEP 23 2012

NCZ003>006-019-020-VAZ022>024-032>035-043>047-058-059-241745-
SURRY-STOKES-ROCKINGHAM-CASWELL-WILKES-YADKIN-ROANOKE-BOTETOURT-
ROCKBRIDGE-PATRICK-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-
CAMPBELL-APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-
142 PM EDT SUN SEP 23 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH
CAROLINA...NORTHWEST NORTH CAROLINA...CENTRAL VIRGINIA...SOUTH
CENTRAL VIRGINIA...SOUTHWEST VIRGINIA AND WEST CENTRAL VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ001-002-018-VAZ007-009>020-WVZ042>045-241745-
ASHE-ALLEGHANY NC-WATAUGA-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-
MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-MERCER-
SUMMERS-MONROE-GREENBRIER-
142 PM EDT SUN SEP 23 2012

...FROST ADVISORY IN EFFECT FROM 4 AM TO 9 AM EDT MONDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST NORTH
CAROLINA...SOUTHWEST VIRGINIA...WEST CENTRAL VIRGINIA AND SOUTHEAST
WEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FROST ADVISORY FROM 1 AM THROUGH 9 AM MONDAY MORNING.

PATCHY FROST CAN BE EXPECTED IN THE VALLEYS LATE TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FROST ADVISORY FROM 1 AM THROUGH 9 AM MONDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.