Alert archive / North Carolina / Wind Advisories in 2009
Wind Advisory 20, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this wind advisory at Dec 28, 2009, 2:44 PM EST for Avery County, Mitchell County, Yancey County, North Carolina. It took effect at Dec 28, 2009, 6:00 PM EST. It was in force for 17 hr.
The area
The counties it named.
The facts
- Issued
- Dec 28, 2009, 2:44 PM EST (19:44 UTC)
- In effect from
- Dec 28, 2009, 6:00 PM EST
- Expired
- Dec 29, 2009, 11:15 AM EST
- In force
- 17 hr
- Issued by
- NWS Greenville-Spartanburg, SC
Counties Avery County, NC, Mitchell County, NC, Yancey County, NC
The radar
The Knoxville radar (KMRX), 116 km from the middle of the area, began a volume at 19:43 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.7 hours before the alert went out and 201 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1626 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS72 KGSP 281944 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 244 PM EST MON DEC 28 2009 ...WINDY CONDITIONS TO CONTINUE ACROSS THE MOUNTAINS INTO TUESDAY MORNING... .DEEP LOW PRESSURE OVER EASTERN CANADA IS COMBINING WITH HIGH PRESSURE OVER THE PLAINS STATES TO KEEP GUSTY NORTHWEST WINDS IN PLACE ACROSS THE SOUTHERN APPALACHIANS THROUGH TUESDAY MORNING. NCZ033-049-050-290500- /O.NEW.KGSP.WI.Y.0020.091228T2300Z-091229T1700Z/ /O.CON.KGSP.LW.Y.0029.000000T0000Z-091228T2300Z/ AVERY-YANCEY-MITCHELL- INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE 244 PM EST MON DEC 28 2009 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM EST THIS EVENING... ...WIND ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO NOON EST TUESDAY... THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO NOON EST TUESDAY. A LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM EST THIS EVENING. NORTHWEST WINDS WILL INCREASE AGAIN THIS EVENING ACROSS THE NORTHERN MOUNTAINS OF NORTH CAROLINA. SUSTAINED WINDS OF 15 TO 25 MPH LATE THIS AFTERNOON WILL INCREASE TO BETWEEN 25 AND 35 MPH THROUGH THE EVENING HOURS. OCCASIONAL WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED TONIGHT...WITH A FEW GUSTS ABOVE 50 MPH ALONG THE HIGHER RIDGE TOP LOCATIONS. WINDS WILL SLOWLY DIMINISH THROUGH THE MORNING HOURS TUESDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A LAKE WIND ADVISORY INDICATES THAT WINDS WILL CAUSE ROUGH CHOP ON AREA LAKES. SMALL BOATS WILL BE ESPECIALLY PRONE TO CAPSIZING. A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$ GAZ010-017-NCZ048-051>053-058-059-062>065-501-503-505-507-509- SCZ001>003-290500- /O.EXT.KGSP.LW.Y.0029.000000T0000Z-091229T1700Z/ RABUN-HABERSHAM-MADISON-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- INCLUDING THE CITIES OF...CLAYTON...CLARKESVILLE...CHEROKEE... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE...LAKE LURE 244 PM EST MON DEC 28 2009 ...LAKE WIND ADVISORY NOW IN EFFECT UNTIL NOON EST TUESDAY... THE LAKE WIND ADVISORY IS NOW IN EFFECT UNTIL NOON EST TUESDAY. NORTHWEST WINDS OF 15 TO 25 MPH WILL CONTINUE ACROSS MUCH OF THE SOUTHERN APPALACHIANS TONIGHT THROUGH EARLY TUESDAY. SUSTAINED WINDS OF 20 TO 30 MPH WILL BE MORE LIKELY AT ELEVATIONS ABOVE 3500 FEET. OCCASIONAL WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED...ESPECIALLY AT HIGHER RIDGE TOP LOCATIONS OF THE NORTH CAROLINA MOUNTAINS. THE WIND GUSTS COULD EXTEND DOWN INTO THE LOWER VALLEYS AT TIMES...ESPECIALLY IN VALLEYS EXPOSED TO NORTHWEST FLOW. THE WINDS WILL GRADUALLY SUBSIDE THROUGH THE MORNING HOURS TUESDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A LAKE WIND ADVISORY INDICATES THAT WINDS WILL CAUSE ROUGH CHOP ON AREA LAKES. SMALL BOATS WILL BE ESPECIALLY PRONE TO CAPSIZING. && $$ GERAPETRITIS
4 follow-up statements
000 WWUS72 KGSP 282353 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 653 PM EST MON DEC 28 2009 ...WINDY CONDITIONS TO CONTINUE ACROSS THE MOUNTAINS INTO TUESDAY MORNING... .DEEP LOW PRESSURE OVER EASTERN CANADA IS COMBINING WITH HIGH PRESSURE OVER THE PLAINS STATES TO KEEP GUSTY NORTHWEST WINDS IN PLACE ACROSS THE SOUTHERN APPALACHIANS THROUGH TUESDAY MORNING. NCZ033-049-050-290800- /O.CON.KGSP.WI.Y.0020.000000T0000Z-091229T1700Z/ AVERY-YANCEY-MITCHELL- INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE 653 PM EST MON DEC 28 2009 ...WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TUESDAY... A WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TUESDAY. NORTHWEST WINDS WILL INCREASE TO 25 AND 35 MPH THROUGH THE EVENING HOURS. OCCASIONAL WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED TONIGHT...WITH A FEW GUSTS ABOVE 50 MPH ALONG THE HIGHER RIDGE TOP LOCATIONS. WINDS WILL SLOWLY DIMINISH THROUGH THE MORNING HOURS TUESDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$ GAZ010-017-NCZ048-051>053-058-059-062>065-501-503-505-507-509- SCZ001>003-290800- /O.CON.KGSP.LW.Y.0029.000000T0000Z-091229T1700Z/ RABUN-HABERSHAM-MADISON-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- INCLUDING THE CITIES OF...CLAYTON...CLARKESVILLE...CHEROKEE... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE...LAKE LURE 653 PM EST MON DEC 28 2009 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TUESDAY... A LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TUESDAY. NORTHWEST WINDS OF 15 TO 25 MPH WILL CONTINUE ACROSS MUCH OF THE SOUTHERN APPALACHIANS TONIGHT THROUGH EARLY TUESDAY. SUSTAINED WINDS OF 20 TO 30 MPH WILL BE MORE LIKELY AT ELEVATIONS ABOVE 3500 FEET. OCCASIONAL WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED... ESPECIALLY AT HIGHER RIDGE TOP LOCATIONS OF THE NORTH CAROLINA MOUNTAINS. THE WIND GUSTS COULD EXTEND DOWN INTO THE LOWER VALLEYS AT TIMES...ESPECIALLY IN VALLEYS EXPOSED TO NORTHWEST FLOW. THE WINDS WILL GRADUALLY SUBSIDE THROUGH THE MORNING HOURS TUESDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A LAKE WIND ADVISORY INDICATES THAT WINDS WILL CAUSE ROUGH CHOP ON AREA LAKES. SMALL BOATS WILL BE ESPECIALLY PRONE TO CAPSIZING. && $$ NED
000 WWUS72 KGSP 290247 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 947 PM EST MON DEC 28 2009 ...WINDY CONDITIONS TO CONTINUE ACROSS THE MOUNTAINS INTO TUESDAY MORNING... .DEEP LOW PRESSURE OVER EASTERN CANADA IS COMBINING WITH HIGH PRESSURE OVER THE PLAINS STATES TO KEEP GUSTY NORTHWEST WINDS IN PLACE ACROSS THE SOUTHERN APPALACHIANS THROUGH TUESDAY MORNING. NCZ033-049-050-291100- /O.CON.KGSP.WI.Y.0020.000000T0000Z-091229T1700Z/ AVERY-YANCEY-MITCHELL- INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE 947 PM EST MON DEC 28 2009 ...WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TUESDAY... A WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TUESDAY. NORTHWEST WINDS WILL RANGE FROM 25 TO 35 MPH OVERNIGHT. OCCASIONAL WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED TONIGHT...WITH A FEW GUSTS ABOVE 50 MPH ALONG THE HIGHER RIDGE TOP LOCATIONS. WINDS WILL SLOWLY DIMINISH THROUGH THE MORNING HOURS TUESDAY. TEMPERATURES LATE TONIGHT ARE FORECAST TO FALL INTO THE TEENS. THE COLD TEMPERATURES COMBINED WITH THE WINDY CONDITIONS WILL LIKELY PUSH WIND CHILL VALUES TO NEAR ZERO AT TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$ GAZ010-017-NCZ048-051>053-058-059-062>065-501-503-505-507-509- SCZ001>003-291100- /O.CON.KGSP.LW.Y.0029.000000T0000Z-091229T1700Z/ RABUN-HABERSHAM-MADISON-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- INCLUDING THE CITIES OF...CLAYTON...CLARKESVILLE...CHEROKEE... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE...LAKE LURE 947 PM EST MON DEC 28 2009 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TUESDAY... A LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TUESDAY. NORTHWEST WINDS OF 15 TO 25 MPH WILL CONTINUE ACROSS MUCH OF THE SOUTHERN APPALACHIANS TONIGHT THROUGH EARLY TUESDAY. SUSTAINED WINDS OF 20 TO 30 MPH WILL BE MORE LIKELY AT ELEVATIONS ABOVE 3500 FEET. OCCASIONAL WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED... ESPECIALLY AT HIGHER RIDGE TOP LOCATIONS OF THE NORTH CAROLINA MOUNTAINS. THE WIND GUSTS COULD EXTEND DOWN INTO THE LOWER VALLEYS AT TIMES...ESPECIALLY IN VALLEYS EXPOSED TO NORTHWEST FLOW. THE WINDS WILL GRADUALLY SUBSIDE THROUGH THE MORNING HOURS TUESDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A LAKE WIND ADVISORY INDICATES THAT WINDS WILL CAUSE ROUGH CHOP ON AREA LAKES. SMALL BOATS WILL BE ESPECIALLY PRONE TO CAPSIZING. && $$ NED
000 WWUS72 KGSP 290800 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 300 AM EST TUE DEC 29 2009 ...WINDY CONDITIONS TO CONTINUE ACROSS THE MOUNTAINS THIS MORNING... NCZ033-049-050-291700- /O.CON.KGSP.WI.Y.0020.000000T0000Z-091229T1700Z/ AVERY-YANCEY-MITCHELL- INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE 300 AM EST TUE DEC 29 2009 ...WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TODAY... A WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TODAY. NORTHWEST WINDS WILL RANGE FROM 25 TO 35 MPH ACROSS THE NORTHERN MOUNTAINS EARLY THIS MORNING. OCCASIONAL WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED EARLY THIS MORNING...WITH A FEW GUSTS ABOVE 50 MPH ALONG THE HIGHER RIDGE TOP LOCATIONS. WINDS WILL SLOWLY DIMINISH AFTER DAYBREAK TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$ GAZ010-017-NCZ048-051>053-058-059-062>065-501-503-505-507-509- SCZ001>003-291700- /O.CON.KGSP.LW.Y.0029.000000T0000Z-091229T1700Z/ RABUN-HABERSHAM-MADISON-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- INCLUDING THE CITIES OF...CLAYTON...CLARKESVILLE...CHEROKEE... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE...LAKE LURE 300 AM EST TUE DEC 29 2009 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TODAY... A LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL NOON EST TODAY. NORTHWEST WINDS OF 15 TO 25 MPH WILL CONTINUE ACROSS THE CENTRAL AND SOUTHERN MOUNTAINS OF NORTH CAROLINA...AND THE MOUNTAINS OF THE UPSTATE AND EXTREME NORTHEAST GEORGIA...EARLY THIS MORNING. SUSTAINED WINDS OF 20 TO 30 MPH WILL BE MORE LIKELY AT ELEVATIONS ABOVE 3500 FEET. OCCASIONAL WIND GUSTS OF 35 TO 45 MPH ARE EXPECTED... ESPECIALLY AT HIGHER RIDGE TOP LOCATIONS OF THE NORTH CAROLINA MOUNTAINS. THE WIND GUSTS WILL EXTEND DOWN INTO THE LOWER VALLEYS AT TIMES...ESPECIALLY IN VALLEYS EXPOSED TO NORTHWEST FLOW. THE WINDS WILL GRADUALLY SUBSIDE AFTER DAYBREAK TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A LAKE WIND ADVISORY INDICATES THAT WINDS WILL CAUSE ROUGH CHOP ON AREA LAKES. SMALL BOATS WILL BE ESPECIALLY PRONE TO CAPSIZING. && $$
000 WWUS72 KGSP 291615 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1115 AM EST TUE DEC 29 2009 NCZ033-049-050-291715- /O.CAN.KGSP.WI.Y.0020.000000T0000Z-091229T1700Z/ AVERY-YANCEY-MITCHELL- INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE 1115 AM EST TUE DEC 29 2009 ...WIND ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS CANCELLED THE WIND ADVISORY. BREEZY CONDITIONS MAY PERSIST ACROSS THE NORTHERN MOUNTAINS OF NORTH CAROLINA INTO THE EARLY AFTERNOON HOURS. HOWEVER...SUSTAINED NORTHWEST WINDS SHOULD BE LESS THAN 20 MPH...WITH ONLY A FEW GUSTS TO 30 MPH EARLY THIS AFTERNOON. $$ GAZ010-017-NCZ048-051>053-058-059-062>065-501-503-505-507-509- SCZ001>003-291715- /O.CAN.KGSP.LW.Y.0029.000000T0000Z-091229T1700Z/ RABUN-HABERSHAM-MADISON-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- INCLUDING THE CITIES OF...CLAYTON...CLARKESVILLE...CHEROKEE... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE...LAKE LURE 1115 AM EST TUE DEC 29 2009 ...LAKE WIND ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS CANCELLED THE LAKE WIND ADVISORY. BREEZY CONDITIONS MAY PERSIST ACROSS THE NORTH CAROLINA MOUNTAINS INTO THE EARLY AFTERNOON HOURS. HOWEVER...SUSTAINED NORTHWEST WINDS WILL DIMINISH TO BETWEEN 10 AND 20 MPH...WITH A FEW GUSTS INTO THE 20 TO 30 MPH RANGE...THROUGH EARLY AFTERNOON. $$ GERAPETRITIS
What forecasters said that day
The local office's own words before this wind advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this wind advisory went out at Dec 28, 12:52 PM EST, 1 hour 52 minutes earlier.
Area forecast discussion, Dec 28, 12:52 PM EST, 1 hour 52 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1252 PM EST MON DEC 28 2009
.SYNOPSIS...
HIGH PRESSURE WILL GRADUALLY BUILD ACROSS THE SOUTHEAST FROM THE
WEST TODAY AND BE CENTERED OVER THE MID ATLANTIC BY EARLY WEDNESDAY.
AS THIS HIGH MOVES OFF THE EAST COAST...LOW PRESSURE IS EXPECTED TO
APPROACH THE CAROLINAS FROM THE GULF COAST ON THURSDAY. A COLDER
HIGH PRESSURE SYSTEM WILL THEN BUILD OVER OUR AREA NEXT WEEKEND.
&&
.NEAR TERM /THROUGH TUESDAY/...
A STRONG UPPER LEVEL TROUGH WILL MOVE TO THE ERN SEABOARD THIS
EVENING...WITH DEEP NW FLOW IN PLACE ACROSS THE FORECAST AREA.
ANOTHER WAVE WILL ROUND THE ERN CANADIAN VORTEX TONIGHT. THIS SHOULD
REMAIN WELL N OF THE FORECAST AREA...AS WILL ANY DEEPER LAYER
MOISTURE. LOW LEVEL MOISTURE...HOWEVER...WILL RETURN TO THE SPINE OF
THE SRN APPALACHIANS ON IMPROVING NW FLOW BY EARLY EVENING. THE BEST
UPSLOPE MOISTURE SHOULD OCCUR DURING THE EVENING HOURS...WITH SLOW
SFC TO 850 MB DRYING THROUGH THE EARLY MORNING HOURS. MODEL
CONSENSUS ALSO INDICATES THAT 850 MB FLOW WILL INCREASE TO 45 OR 50
KT THIS EVENING. ALTHOUGH WIND SPEEDS WILL BE A LITTLE BETTER
TONIGHT THAN OBSERVED THIS MORNING IN THE NW FLOW...THE VERY SHALLOW
MOISTURE SHOULD LIMIT QPF TO ONLY A FEW HUNDREDTHS OF AN INCH IN NW
FLOW PRONE LOCATIONS. WILL THUS MENTION ONLY SCATTERED SNOW
SHOWERS...WITH ANY LIGHT ACCUMULATIONS CAPPED AT LESS THAN ONE HALF
INCH IN TN BORDER LOCATIONS. A WIND ADVISORY WILL LIKELY BE POSTED
ACROSS THE NRN MTNS...WITH AN EXTENSION OF THE LAKE WIND ADVISORY
ACROSS CENTRAL AND SRN SECTIONS OVERNIGHT.
UPPER LEVEL HEIGHTS WILL SLOWLY RISE FROM THE SOUTHWEST ON
TUESDAY...WITH TEMPERATURES WARMING A FEW DEGREES OVER MONDAY MAXES.
DRY SFC HIGH PRES WILL BUILD OVER FROM THE NW...ALLOWING THE PRES
GRAD TO RELAX AND REMOVE WIND GUSTS. ONLY A FEW HIGH CLOUDS ARE
INDICATED AS THE UPPER JET STREAM RIDES BACK N OVER THE AREA.
&&
.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/...
AS OF 200 AM MONDAY...AN UPPER RIDGE WILL CROSS THE MS RIVER VALLEY
ON TUESDAY...REACHING THE EAST COAST ON WEDNESDAY. A SLOWLY
PROGRESSIVE LONGWAVE TROUGH WILL CROSS THE CENTER OF THE NATION IN
THE THE RIDGE. A SHORTWAVE EXITING THE TROUGH AXIS WILL CROSS THE
SOUTHERN APPALACHIANS WEDNESDAY NIGHT. ON THURSDAY A SECOND...
STRONGER SHORTWAVE WILL REACH THE BASE OF THE TROUGH OVER THE MS
RIVER VALLEY.
A DRY SURFACE RIDGE WILL MOVE FORM THE PLAINS TO THE CENTRAL
APPALACHIANS TUESDAY...CAUSING THE PRESSURE GRADIENT OVER THE EAST
COAST TO RELAX AND MOVE OFFSHORE. THIS RIDGE REACHES THE EAST COAST
BY WEDNESDAY MORNING. CIRRUS WILL MOVE OVER OUR AREA TUESDAY
NIGHT...THEN ISENTROPIC UPGLIDE WILL SPREAD MID AND LOW LEVEL
MOISTURE NORTHEAST FROM THE GULF ON WEDNESDAY. MODEL SOUNDINGS ARE
QUITE DRY IN THE LOWER LEVELS EARLY WEDNESDAY...AND POPS WILL BE
KEPT LOW IN THE MORNING AND CONFINED TO THE SAVANNAH RIVER VALLEY
AND THE SOUTHWEST NC MOUNTAINS. THICKNESS NOMOGRAMS SUPPORT
PRECIPITATION STARTING AS SNOW WEDNESDAY MORNING...TRANSITIONING TO
RAIN AND SLEET AT LOWER ELEVATIONS AS A WARM NOSE ALOFT GROWS
VERTICALLY. THE ATMOSPHERIC COLUMN MOISTENS LATE IN THE DAY...BUT
NOT ENOUGH FOR SATURATION. BY AFTERNOON RAIN SPREADS INTO THE NC
FOOTHILLS AND PIEDMONT...MIXED WITH SLEET...WITH RAIN IN GA ND
SC...AND SNOW REMAINING AT THE HIGHEST ELEVATIONS OF THE MOUNTAINS.
AS THE WARM NOSE CONTINUES TO DEEPEN...PRECIPITATION CHANGES TO ALL
LIQUID...FREEZING WHERE NIGHTTIME TEMPERATURES ARE COOL ENOUGH...
MAINLY IN NC. A TRANSITION TO ALL RAIN TAKES PLACE THURSDAY WITH
WARMING. UPGLIDE DIMINISHES IN THE WEAK OF A SURFACE WAVE EARLY
THURSDAY...BUT INCREASES IN THE AFTERNOON WITH THE ARRIVAL OF A
SECOND SURFACE WAVE. UNCERTAINTY WITH THE TIMING AND LOCATIONS OF
THESE WAVES LEAVES QPF IN DOUBT. AT THIS TIME THE FORECAST HAS
AROUND ONE INCH OF SNOW IN THE HIGH NC MOUNTAINS...AND AROUND ONE
TENTH OF AN INCH OF FREEZING RAIN IN THE MOUNTAINS AND INTERSTATE 40
CORRIDOR OF NC.
TEMPERATURES WILL COOL FROM NEAR NORMAL ON TUESDAY TO A CATEGORY
BELOW NORMAL TUESDAY NIGHT...THEN WILL EXHIBIT A REDUCED DIURNAL
RANGE ON WEDNESDAY AND THURSDAY AS CLOUD COVER INCREASES.
&&
.LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/...
AS OF 215 AM MONDAY...THE MEDIUM RANGE MODELS ARE COMING INTO BETTER
AGREEMENT. THE GFS...ECMWF AND GEM SHOW THE APPROACHING DEEP TROUGH
CROSSING THE MISSISSIPPI VALLEY THURSDAY EVENING. THE
GEM...HOWEVER...AT THIS POINT ALREADY HAS MOVED MOST OF THE PRECIP
OUT EAST OF OUR AREA BY THURSDAY EVENING JUST LEAVING JUST A BRIEF
SHOT OF NORTHWEST FLOW SNOW FOR THE NC MOUNTAINS. THE GEM HAS THE
AXIS OF THE DEEP 500MB TROUGH CROSSING AROUND 06Z SATURDAY. THE
ECMWF HAS THE AXIS CROSSING A FEW HOURS EARLIER...BETWEEN 00Z AND
06Z SATURDAY. THE GFS IS ROUGHLY IN LINE WITH THE ECMWF. THE GFS
AND ECMWF BOTH KEEP SOME NW FLOW SNOW IN THE NC MOUNTAINS INTO
SATURDAY NIGHT...DRYING IT UP FROM SOUTH TO NORTH AND ENDING BEFORE
SUNRISE SUNDAY. IT APPEARS THE PRESSURE GRADIENT WILL BE QUITE
TIGHT FOR LATE FRIDAY INTO EARLY SATURDAY...SO NORTH TO NORTH
NORTHWEST WIND WILL BE BREEZY TO WINDY IN THIS PERIOD AND LIKELY
NEED WIND ADVISORY FOR AT LEAST THE MOUNTAINS. LOOKS LIKE SATURDAY
WILL BE COLDEST DAY WITH TEMPERATURES AROUND 15 DEGREES BELOW NORMAL
AND SUNDAY JUST A FEW DEGREES MILDER. TIMING DIFFERENCES EXIST
BETWEEN GFS AND ECMWF TO START NEXT WEEK WITH TROUGHS...BUT BELOW
NORMAL TEMPERATURES SHOULD CONTINUE. THE ECMWF HAS ANOTHER LOW
FORMING OVER SOUTH LOUISIANA EARLY MONDAY TO TRACK TOWARD OUR
REGION. THE GFS HAS A VERY MINOR LOW OFF THE TEXAS COAST AT THAT
TIME. I AGREE WITH THE PREVIOUS SHIFT THAT THE BLOCKING PATTERN
NEAR GREENLAND IS KEEPING MUCH OF NORTH AMERICA STUCK IN OUR CURRENT
PATTERN.
&&
.AVIATION /18Z MONDAY THROUGH SATURDAY/...
AT KCLT...LEE TROUGHING IN THE PIEDMONT HAS BEEN SLIGHTLY WEAKER
THAN EXPECTED THUS FAR. ALTHOUGH WINDS SHOULD TREND BACK TOWARD
WESTERLY LATE THIS AFTN...WILL NOW KEEP FLOW NORTH OF WEST THROUGH
THE PERIOD. A BRIEF ADJUSTMENT TO SW REMAINS
POSSIBLE...HOWEVER...DURING THE LATE AFTN HOURS. WINDS WILL THEN
RETURN TO NW LATER TONIGHT...WITH NOTHING MORE THAN A FEW HIGH
CLOUDS THROUGH THE REMAINDER OF THE PERIOD.
AT KAVL...GUSTY NORTHWEST WINDS WILL CONTINUE THROUGH THE PERIOD.
MOISTURE WILL RETURN ON THE NORTHWEST FLOW THIS EVENING TO PRODUCE
MAINLY VFR LEVEL CLOUDS. MODEL PROFILES NOW INSIST ON SOME PERIOD OF
MVFR CLOUDS DEVELOPING DURING THE DEEPEST NW FLOW MOISTURE
OVERNIGHT. WILL THUS ADVERTISE TEMPO BKN025 04Z TO 08Z. THE MVFR TO
VFR CIGS WILL THEN SCATTER OUT BY 13Z AS THE NORTHWEST FLOW MOISTURE
DIMINISHES. GUSTS SHOULD ALSO DIMINISH SOMEWHAT THROUGH THE LATER
MORNING HOURS.
ELSEWHERE...MAINLY NORTHWEST WINDS ARE ANTICIPATED THROUGH THE
PERIOD...BUT A LEE TROUGH THIS AFTN COULD PRODUCE BRIEF AND SHARP
CHANGES IN DIRECTION. MORE OF A N TO NE FLOW WILL BE POSSIBLE AT
TIMES KGSP TO KGMU AS THE LEE TROUGH SETS UP JUST TO THE EAST. KAND
WILL MORE OF A CHANCE OF SW FLOW AT TIMES...BUT WESTERLY WINDS WILL
BE A BETTER FORECAST ON AVERAGE. GUSTS SHOULD DIMINISH THROUGHOUT BY
SUNDOWN. ONLY A FEW STRATOCUMULUS MAY SPILL OVER THE MTNS IN THE
VICINITY OF KHKY TONIGHT...BUT NOTHING MORE THAN FEW TO SCT CIRRUS
ARE EXPECTED ELSEWHERE.
OUTLOOK...HIGH PRES WILL LEAD TO VFR CONDITIONS INTO WED MORNING.
MOISTURE RETURNS FROM THE SW WED AFTN THROUGH THU MORNING TO GREATLY
INCREASE PRECIPITATION CHANCES AND FLIGHT RESTRICTIONS. A WINTRY MIX
WILL BE POSSIBLE...ESPECIALLY FROM KAVL TO KHKY. DRYING AND WINDY
CONDITIONS ARE EXPECTED THU NIGHT THROUGH FRI.
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...LAKE WIND ADVISORY UNTIL 6 PM EST THIS EVENING FOR GAZ010-017.
NC...LAKE WIND ADVISORY UNTIL 6 PM EST THIS EVENING FOR NCZ033-
048>053-058-059-062>065-501-503-505-507-509.
SC...LAKE WIND ADVISORY UNTIL 6 PM EST THIS EVENING FOR SCZ001>003.
&&
SYNOPSIS...DEO
NEAR TERM...HG
SHORT TERM...JAT
LONG TERM...DEO
AVIATION...HGHazardous weather outlook, Dec 28, 10:01 AM EST, 4 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1001 AM EST MON DEC 28 2009 GAZ010-017-NCZ033-048>053-058-059-062>065-501-503-505-507-509- SCZ001>003-291515- RABUN-HABERSHAM-AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE- GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA- HENDERSON-CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- 1001 AM EST MON DEC 28 2009 ...LAKE WIND ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. LAKE WIND ADVISORY. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. A WINTRY MIX OF PRECIPITATION IS POSSIBLE ON WEDNESDAY AND THURSDAY...CHANGING TO SNOW ON FRIDAY. AT THIS TIME UNCERTAINTY EXISTS REGARDING THE AMOUNT OF SNOW AND ICE ACCUMULATIONS...BUT IT APPEARS THAT GREATEST ACCUMULATIONS WILL BE AT HIGHER ELEVATIONS. .SPOTTER INFORMATION STATEMENT... NONE. GAZ018-026-028-029-NCZ035>037-056-057-068>072-082-502-504-506-508- 510-SCZ004>014-019-291515- STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL-DAVIE-CATAWBA-ROWAN- CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC- GREATER CALDWELL-GREATER BURKE-EASTERN MCDOWELL-GREATER RUTHERFORD- EASTERN POLK-GREATER OCONEE-GREATER PICKENS-GREATER GREENVILLE- SPARTANBURG-CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC- CHESTER-GREENWOOD- 1001 AM EST MON DEC 28 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. A WINTRY MIX OF PRECIPITATION IS POSSIBLE ON WEDNESDAY AND THURSDAY. AT THIS TIME UNCERTAINTY EXISTS REGARDING THE AMOUNT OF SLEET AND ICE ACCUMULATIONS...BUT IT APPEARS THAT GREATEST ACCUMULATIONS WILL NORTH OF INTERSTATE 40 IN NORTH CAROLINA. .SPOTTER INFORMATION STATEMENT... NONE.
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 28, 4:00 AM EST | Lake Wind Advisory | GSP | Avery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more | 31 hr |
Nearby
Wind Advisories in North Carolina, 2009Every wind advisory in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.