Alert archive / North Carolina / Freeze Warnings in 2012
Freeze Warning 8, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this freeze warning at Apr 23, 2012, 5:08 AM EDT for 17 counties in North Carolina. It took effect at Apr 24, 2012, 12:00 AM EDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 23, 2012, 5:08 AM EDT (09:08 UTC)
- In effect from
- Apr 24, 2012, 12:00 AM EDT
- Expired
- Apr 24, 2012, 8:02 AM EDT
- In force
- 8 hr
- Issued by
- NWS Greenville-Spartanburg, SC
Counties Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC
The radar
The Greer radar (KGSP), 83 km from the middle of the area, began a volume at 09:11 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 00:00Z, 9.1 hours before the alert went out and 244 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
- 3 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 694 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- -150 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
097 WWUS72 KGSP 230908 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 508 AM EDT MON APR 23 2012 ...STRONG GUSTY WINDS TODAY WITH A WIDESPREAD FREEZE ACROSS THE WESTERN NORTH CAROLINA MOUNTAINS TONIGHT... .STRONG GUSTY WINDS WILL DEVELOP THIS MORNING AND CONTINUE THROUGHOUT THE DAY ACROSS ALL THE NORTH CAROLINA MOUNTAINS. THESE WINDS WILL BRING A COOL CANADIAN AIR MASS ACROSS THE REGION TONIGHT. TEMPERATURES ARE EXPECTED TO FALL BELOW FREEZING ACROSS THE NORTH CAROLINA MOUNTAINS TONIGHT. NCZ033-231900- /O.NEW.KGSP.FZ.W.0008.120424T0400Z-120424T1300Z/ /O.CON.KGSP.FZ.W.0007.000000T0000Z-120423T1300Z/ /O.CON.KGSP.WI.Y.0006.120423T1100Z-120424T0100Z/ AVERY- INCLUDING THE CITY OF...NEWLAND 508 AM EDT MON APR 23 2012 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... ...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY... THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY. * LOCATIONS...AVERY COUNTY IN NORTH CAROLINA. * HAZARDS...FREEZING TEMPERATURES AND STRONG GUSTY WINDS. * TIMING...FREEZING TEMPERATURES THIS MORNING. STRONG WINDS THROUGH THIS EVENING. FREEZING TEMPERATURES AGAIN TONIGHT. * WINDS...NORTHWEST 20 TO 30 MPH WITH GUSTS UP TO 45 MPH. * TEMPERATURES...LOWS IN THE UPPER 20S TO LOWER 30S. * IMPACTS...DAMAGE TO SENSITIVE OUTDOOR PLANTS. LOOSE OBJECTS MAY NEED TO BE SECURED FROM GUSTY WINDS. DRIVING COULD BE DIFFICULT IN HIGHER GUSTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. 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. && $$ NCZ048>053-058-059-062>065-501-503-505-231900- /O.NEW.KGSP.FZ.W.0008.120424T0400Z-120424T1300Z/ /O.CON.KGSP.WI.Y.0006.120423T1100Z-120424T0100Z/ MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- INCLUDING THE CITIES OF...SPRUCE PINE...BRYSON CITY... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE 508 AM EDT MON APR 23 2012 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY... THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY. * LOCATIONS...THE MOUNTAINS OF NORTH CAROLINA. * HAZARDS...STRONG GUSTY WINDS AND FREEZING TEMPERATURES. * TIMING...STRONG WINDS THROUGH THIS EVENING. FREEZING TEMPERATURES TONIGHT. * WINDS...NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 45 MPH. * IMPACTS...DAMAGE TO SENSITIVE OUTDOOR PLANTS. LOOSE OBJECTS MAY NEED TO BE SECURED FROM GUSTY WINDS. DRIVING COULD BE DIFFICULT IN HIGHER GUSTS. * TEMPERATURES...LOWS AROUND 30. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ NCZ507-509-231900- /O.NEW.KGSP.FZ.W.0008.120424T0400Z-120424T1300Z/ /O.EXA.KGSP.WI.Y.0006.120423T1100Z-120424T0100Z/ RUTHERFORD MOUNTAINS-POLK MOUNTAINS- 508 AM EDT MON APR 23 2012 ...WIND ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY... THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY. A WIND ADVISORY HAS ALSO BEEN ISSUED. THIS WIND ADVISORY IS IN EFFECT UNTIL 9 PM EDT THIS EVENING. * LOCATIONS...THE MOUNTAINS OF NORTH CAROLINA. * HAZARDS...STRONG GUSTY WINDS AND FREEZING TEMPERATURES. * TIMING...STRONG WINDS THROUGH THIS EVENING. FREEZING TEMPERATURES TONIGHT. * WINDS...NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. * IMPACTS...DAMAGE TO SENSITIVE OUTDOOR PLANTS. LOOSE OBJECTS MAY NEED TO BE SECURED FROM GUSTY WINDS. DRIVING COULD BE DIFFICULT IN HIGHER GUSTS. * TEMPERATURES...LOWS IN THE LOW 30S. 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. A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ NED
4 follow-up statements
695 WWUS72 KGSP 231258 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 858 AM EDT MON APR 23 2012 ...STRONG GUSTY WINDS TODAY WITH A WIDESPREAD FREEZE ACROSS THE WESTERN NORTH CAROLINA MOUNTAINS TONIGHT... .STRONG GUSTY WINDS WILL DEVELOP THIS MORNING AND CONTINUE THROUGHOUT THE DAY ACROSS THE NORTH CAROLINA MOUNTAINS. THESE WINDS WILL BRING A COOL CANADIAN AIR MASS ACROSS THE REGION TONIGHT. TEMPERATURES ARE EXPECTED TO FALL BELOW FREEZING ACROSS THE NORTH CAROLINA MOUNTAINS TONIGHT. NCZ033-232100- /O.EXP.KGSP.FZ.W.0007.000000T0000Z-120423T1300Z/ /O.CON.KGSP.FZ.W.0008.120424T0400Z-120424T1300Z/ /O.CON.KGSP.WI.Y.0006.000000T0000Z-120424T0100Z/ AVERY- INCLUDING THE CITY OF...NEWLAND 858 AM EDT MON APR 23 2012 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY... * LOCATIONS...AVERY COUNTY IN NORTH CAROLINA. * HAZARDS...STRONG GUSTY WINDS AND FREEZING TEMPERATURES. * TIMING...STRONG WINDS THROUGH THIS EVENING. FREEZING TEMPERATURES TONIGHT. * WINDS...NORTHWEST 20 TO 30 MPH WITH GUSTS UP TO 45 MPH. * TEMPERATURES...LOWS IN THE UPPER 20S TO LOWER 30S. * IMPACTS...DAMAGE TO SENSITIVE OUTDOOR PLANTS. LOOSE OBJECTS MAY NEED TO BE SECURED FROM GUSTY WINDS. DRIVING COULD BE DIFFICULT IN HIGHER GUSTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$ NCZ048>053-058-059-062>065-501-503-505-507-509-232100- /O.CON.KGSP.FZ.W.0008.120424T0400Z-120424T1300Z/ /O.CON.KGSP.WI.Y.0006.000000T0000Z-120424T0100Z/ MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS- INCLUDING THE CITIES OF...SPRUCE PINE...BRYSON CITY... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE 858 AM EDT MON APR 23 2012 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY... * LOCATIONS...THE MOUNTAINS OF NORTH CAROLINA. * HAZARDS...STRONG GUSTY WINDS AND FREEZING TEMPERATURES. * TIMING...STRONG WINDS THROUGH THIS EVENING. FREEZING TEMPERATURES TONIGHT. * WINDS...NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 45 MPH. * IMPACTS...DAMAGE TO SENSITIVE OUTDOOR PLANTS. LOOSE OBJECTS MAY NEED TO BE SECURED FROM GUSTY WINDS. DRIVING COULD BE DIFFICULT IN HIGHER GUSTS. * TEMPERATURES...LOWS AROUND 30. 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. A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ HG
293 WWUS72 KGSP 231846 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 246 PM EDT MON APR 23 2012 ...STRONG GUSTY WINDS THROUGH MID EVENING WITH A WIDESPREAD FREEZE OVERNIGHT ACROSS THE WESTERN NORTH CAROLINA MOUNTAINS... .GUSTY NORTHWEST WINDS WILL PERSIST ACROSS THE NORTH CAROLINA MOUNTAINS INTO THE EARLY EVENING HOURS BEFORE SLOWLY DIMINISHING OVERNIGHT. THE STRONG NORTHWEST FLOW WILL BRING A COOL CANADIAN AIR MASS ACROSS THE REGION...WITH TEMPERATURES EXPECTED TO FALL BELOW FREEZING ACROSS THE NORTH CAROLINA MOUNTAINS OVERNIGHT. NCZ033-048>053-058-059-062>065-501-503-505-507-509-240145- /O.CON.KGSP.FZ.W.0008.120424T0400Z-120424T1300Z/ /O.CON.KGSP.WI.Y.0006.000000T0000Z-120424T0100Z/ 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- INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE...BRYSON CITY... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE 246 PM EDT MON APR 23 2012 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY... * LOCATIONS...THE MOUNTAINS OF NORTH CAROLINA. * HAZARDS...STRONG GUSTY WINDS AND FREEZING TEMPERATURES. * TIMING...STRONG WINDS THROUGH MID EVENING. FREEZING TEMPERATURES OVERNIGHT. * WINDS...NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 45 MPH AT TIMES. * IMPACTS...LOOSE OBJECTS MAY NEED TO BE SECURED FROM GUSTY WINDS. DRIVING COULD BE DIFFICULT IN HIGHER GUSTS. A FEW WEAK TREES COULD BE BLOWN DOWN. DAMAGE TO SENSITIVE OUTDOOR PLANTS FROM THE FREEZE OVERNIGHT. * TEMPERATURES...LOWS IN THE UPPER 20S TO AROUND 30. 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. A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ GERAPETRITIS
966 WWUS72 KGSP 240824 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 424 AM EDT TUE APR 24 2012 ...FREEZING TEMPERATURES ACROSS PORTIONS OF THE NORTH CAROLINA MOUNTAINS THIS MORNING... .THIN CLOUD COVER AND DECREASING WINDS WILL SUPPORT AREAS OF FREEZING TEMPERATURES EARLY THIS MORNING. THE LOWEST TEMPERATURES SHOULD OCCUR AT ELEVATION ABOVE 3000 FEET. NCZ033-048>053-058-059-062>065-501-503-505-507-509-241300- /O.CON.KGSP.FZ.W.0008.000000T0000Z-120424T1300Z/ 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- INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE...BRYSON CITY... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE 424 AM EDT TUE APR 24 2012 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * LOCATIONS...THE MOUNTAINS OF NORTH CAROLINA. * HAZARDS...FREEZING TEMPERATURES. * TIMING...FREEZING TEMPERATURES AROUND SUNRISE. * IMPACTS...DAMAGE TO SENSITIVE OUTDOOR PLANTS FROM THE FREEZE THIS MORNING. * TEMPERATURES...LOWS IN THE LOWER 30S. 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. A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ NED
666 WWUS72 KGSP 241202 NPWGSP URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 802 AM EDT TUE APR 24 2012 NCZ033-048>053-058-059-062>065-501-503-505-507-509-241315- /O.CAN.KGSP.FZ.W.0008.000000T0000Z-120424T1300Z/ AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS- INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE...BRYSON CITY... WAYNESVILLE...ASHEVILLE...SYLVA...FRANKLIN...BREVARD... HENDERSONVILLE 802 AM EDT TUE APR 24 2012 ...FREEZE WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS CANCELLED THE FREEZE WARNING. ONLY THE HIGHEST MOUNTAIN PEAKS ABOVE 4000 FEET HAVE FREEZING TEMPERATURES. OTHERWISE...TEMPERATURES ARE ABOVE FREEZING THROUGHOUT THE NORTH CAROLINA MOUNTAINS EARLY THIS MORNING. $$
What forecasters said that day
The local office's own words before this freeze warning 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 freeze warning went out at Apr 23, 4:26 AM EDT, 42 minutes earlier.
Area forecast discussion, Apr 23, 4:26 AM EDT, 42 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
426 AM EDT MON APR 23 2012
.SYNOPSIS...
COOLER AND DEEP CYCLONIC FLOW WILL LINGER ATOP THE REGION THROUGH
TUESDAY. A WARM FRONTAL PASSAGE IS EXPECTED ON WEDNESDAY FOLLOWED BY
WARM AND MOIST SOUTHERLY FLOW THURSDAY. A FRONTAL BOUNDARY WILL DROP
INTO THE AREA FRIDAY AND RETURN NORTH ON SATURDAY.
&&
.NEAR TERM /THROUGH TONIGHT/...
AT 4 AM...LATEST NRN NC MTN HIGH ELEVATION OBSERVATIONS INDICATED
TEMPERATURES RANGING FROM 22 TO 30 DEGREES...WITH VALLEY TEMPS
AROUND 40 DEGREES. SATELLITE IMAGES INDICATED LOW CLOUDS ACROSS THE
TN BORDER COUNTIES...WITH WAVE CLOUDS ACROSS THE NC FOOTHILLS. RADAR
COMPOSITE INDICATES A FEW LIGHT RETURNS ACROSS THE MTNS EARLY THIS
MORNING. BASED ON THE WATER VAPOR LOOP...MOISTURE SHOULD INCREASE
ACROSS THE MTNS DURING THE PRE DAWN HOURS. NAM12 INDICATES THAT NW
WINDS WILL INCREASE AROUND 12Z...LIKELY SUPPORTING AN INCREASE IN
UPSLOPE CLOUD COVER AND PRECIPITATION...I WILL FORECAST TN BORDER
LIKELY POPS. FORECAST SOUNDINGS AND FORECAST SFC TEMP FORECAST
INDICATES THAT THE PRECIP WILL FALL AS SN ACROSS THE HIGH
ELEVATIONS...FALLING A COLD RAIN OR SNOW/RAIN MIX WITHIN THE
VALLEYS. FROM MID MORNING THROUGH NOON...PRECIP ACROSS THE MTNS IS
EXPECTED TO BECOME LIMITED TO THE TN BORDER UPSLOPE AREA...DRY EAST.
LIGHT SNOW ACCUMULATIONS ARE POSSIBLE ACROSS THE HIGH ELEVATIONS.
MORNING PRESSURE GRADIENT IS EXPECTED TO RANGE FROM 4 TO 6
MBS...DECREASING TO AROUND 4 MBS THIS AFTERNOON. FORECAST SOUNDINGS
INDICATE THAT MIXING HEIGHTS WILL INCREASE TO 5 KFT ACROSS THE MTNS
TO 7 TO 8 KFT ACROSS THE PIEDMONT. THE DEEP MIXING AND PRESSURE
GRADIENT WILL SUPPORT WIND ADVISORY CRITERIA WINDS ACROSS THE MTNS
THROUGH EARLY EVENING. EAST OF THE MTNS...WINDS WILL REMAIN
GUSTY...BUT LESS THAN WIND ADVISORY. I WILL HIGHLIGHT THE LAKE WINDS
FORECAST AS A WEB HEADLINE. AFTERNOON TEMPERATURES SHOULD PEAK IN
THE MID 50S ACROSS THE MTNS TO L60S EAST. DEEP MIXING SHOULD PROMOTE
DEWPOINTS FALLING INTO THE MID 20S...RESULTING IN RH VALUES FALLING
TO 30 TO 25 PERCENT DURING THE AFTERNOON...LOWEST ACROSS THE UPPER
SAVANNAH RIVER VALLEY. HOWEVER...LAND MANAGERS INDICATE THAT FUEL
MOISTURE LEVELS ARE HIGH ENOUGH TO LIMIT WILDFIRE POTENTIAL.
TONIGHT...SKY COVER WILL REMAIN THIN...ESPECIALLY EAST OF THE MTNS.
LOW PRESSURE CENTERED OVER NEW ENGLAND AND HIGH PRESSURE CENTERED
OVER THE MISSISSIPPI DELTA...MAINTAINING WNW WINDS ACROSS THE CWA
OVERNIGHT. BOTH THE NAM AND GFS INDICATE THAT THE WNW WINDS WILL
RESULT IN CAA ACROSS THE MTNS...WITH VALUES RANGING FROM 0C TO -3C.
A BLEND OF MAV AND MET SUPPORTS WIDESPREAD FREEZING TEMPERATURES
ACROSS THE NC MTNS...WITH MID TO UPPER 30S EAST. I WILL POST A
FREEZE WARNING FOR THE NC MTNS FOR TONIGHT.
EAST...TEMPERATURES...DEWPOINT DEPRESSIONS...AND WINDS MAY SUPPORT
PATCHY TO AREAS OF FROST EAST OF THE MTNS. HOWEVER..CONFIDENCE FOR
AREAS OF FROST IS NOT HIGH ENOUGH TO SUPPORT A FROST ADVISORY.
&&
.SHORT TERM /TUESDAY THROUGH THURSDAY/...
AS OF 400 AM MONDAY...GUIDANCE IN GENERAL AGREEMENT ON TUE WITH A
SHORT WAVE DROPPING INTO THE AREA THRU THE UPPER TROF OVER THE EAST
COAST. MOISTURE MOVES IN WITH THIS WAVE AS WELL. LOW LEVEL FORCING
WILL BE SUPPLIED OVER THE MTNS BY THE NWLY FLOW IN PLACE OVER THE
AREA. WEAK INSTABILITY DEVELOPS PRODUCING ISOLATED TO SCT SHRA OVER
THE MTNS AND FOOTHILLS. THE WAVE MOVES EAST TUE NITE BUT A WARM
FRONT MOVES IN. THIS KEEPS MOISTURE AND LOW LEVEL FORCING OVER THE
AREA SPREADING ISOLATED SHRA ACROSS THE AREA AND SCT SHRA INTO THE
FAR WRN NC PIEDMONT. HIGHS TUE WILL BE AROUND 10 DEGREES BELOW
NORMAL. LOWS TUE NITE WILL BE A LITTLE BELOW NORMAL...BUT SHUD BE
WARM ENUF TO PRECLUDE ANY FROST/FREEZE CONCERNS. FIRE WX CONCERNS
COULD DEVELOP TUE AS DEEP MIXING AND WLY WIND HELP DROP RH VALUES TO
25 PERCENT OR LESS OVER MUCH OF THE AREA OUTSIDE OF THE MTNS. WINDS
WILL ALSO BE QUITE GUSTY. LAND MANAGERS WILL NEED TO BE CONTACTED TO
SEE IF ENUF DRYING OCCURS TO INCREASE FIRE DANGER.
NW FLOW REMAINS OVER THE AREA WED AND WED NITE BRINGING WEAK SHORT
WAVES ACROSS THE AREA. AT THE SFC...WARM FRONT SLOWLY SLIDES NORTH
ACROSS THE AREA. THIS BRINGS PRECIP BACK INTO THE WRN CWFA WED
AFTERNOON THEN LIFTS IT ACROSS THE NRN CWFA WED NITE. INSTABILITY
WILL BE BEST OVER THE WRN CWFA WHERE TSRA DEVELOP...WITH MAINLY SHRA
OVER THE EAST. HIGHS BOUNCE BACK TO NEAR TO A LITTLE BELOW NORMAL
WITH LOWS RISING TO 5 TO 10 DEGREES ABOVE NORMAL.
FLOW BECOMES A LITTLE MORE WESTERLY THU BRINGING A COLD FRONT INTO
THE NRN CWFA. THIS KEEPS THE BEST AREAS OF PRECIP ACROSS NC WITH
ONLY SLIGHT CHC ELSEWHERE. HIGHS CONTINUE TO RISE TO MORE THAN 5
DEGREES ABOVE NORMAL.
&&
.LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/...
AS OF 415 AM MONDAY...THE LATEST GFS AND ECMWF ARE IN DECENT
AGREEMENT THRU THE PERIOD. COLD FRONT DROPS INTO THE AREA FRIDAY
THEN LIFTS BACK NORTHWARD ON SATURDAY. HOWEVER...THE GFS LIFTS IT
FASTER THAN THE ECMWF. THEN ANOTHER COLD FRONT MOVES IN FROM THE NW
ON SUNDAY. THIS LEADS TO CHC POP FRIDAY...DIMINISHING POP SATURDAY
THEN PRECIP CHC RETURNING SUN. TEMPS REMAIN ABOVE NORMAL THRU THE
PERIOD.
&&
.AVIATION /09Z MONDAY THROUGH FRIDAY/...
AT KCLT AND ELSEWHERE...WIND TIMING AND SPEED WILL REMAIN THE MAIN
FORECAST CHALLENGES THIS PACKAGE. THE PRESSURE GRADIENT ACROSS THE
CWA WILL RANGE FROM 4 TO 6 MBS THROUGH THE DAY LIGHT HOURS TODAY. IN
ADDITION...FORECAST SOUNDINGS INDICATE THAT THE MIXING HEIGHTS WILL
REACH TO AROUND 7 KFT DURING THE AFTERNOON PEAK. MOMENTUM TRANSFER
THROUGHOUT THE MIXED LAYER SHOULD FAVOR FREQUENT GUSTS BETWEEN 26
KTS TO 28 KTS. WIND DIRECTION IS FORECAST TO RANGE BETWEEN 300 TO
330 DEGREES. THE COMBINATION OF DECOUPLING AND WEAKENING PRESSURE
GRADIENT SHOULD END GUSTS AROUND 0Z TUESDAY. ALL TAF SITES EAST OF
THE MTNS ARE FORECAST TO SEE VFR CLOUD BASES WITH P6SM
VISIBILITY.
AT KAVL...WIND DIRECTIONS WILL REMAIN BETWEEN 320 TO 340 DEGREES
THROUGH THE TAF PERIOD. GUSTS WILL LIKELY REMAIN BETWEEN 20 TO 26
KTS THROUGH THE EARLY MORNING HOURS. CEILINGS SHOULD REMAIN
VFR...HOWEVER...TEMPO PERIOD OF MVFR CEILING ARE POSSIBLE UNTIL
SUNRISE. HOWEVER...DEEPENING MIXING SHOULD ALLOW FREQUENT GUSTS TO
DEVELOP TO AROUND 35 KTS BY 15Z...REMAINING THROUGH 0Z TUES. AFTER
0Z...GUSTS WILL CONTINUE...BUT SPEEDS SHOULD DECREASE TO AROUND 25
KTS. VFR CONDITIONS EXPECTED THROUGH THE DAY LIGHT HOURS THROUGH
THIS EVENING.
OUTLOOK...VFR WEATHER EXPECTED THROUGH WEDNESDAY. CEILING AND
VISIBILITY RESTRICTIONS POSSIBLE THURSDAY WHEN A COLD FRONT
APPROACHES FROM THE NORTHWEST.
AN EXPERIMENTAL AVIATION FORECAST CONSISTENCY TABLE SHOWING THE
PERCENTAGE OF GUIDANCE MEMBERS AGREEING WITH THE SCHEDULED ISSUANCE
CATEGORY IS AVAILABLE AT FOLLOWING LINK (USE LOWER CASE)...
WWW.WEATHER.GOV/GSP/AVIATION/TABLES.HTM
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
NC...FREEZE WARNING FROM MIDNIGHT TONIGHT TO 9 AM EDT TUESDAY FOR
NCZ033-048>053-058-059-062>065-501-503-505-507-509.
WIND ADVISORY UNTIL 9 PM EDT THIS EVENING FOR NCZ033-048>053-
058-059-062>065-501-503-505.
FREEZE WARNING UNTIL 9 AM EDT THIS MORNING FOR NCZ033.
SC...NONE.
&&
SYNOPSIS...RWH
NEAR TERM...NED
SHORT TERM...RWH
LONG TERM...RWH
AVIATION...NEDHazardous weather outlook, Apr 22, 10:45 PM EDT, 6 hours 23 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1045 PM EDT SUN APR 22 2012 GAZ010-017-018-026-028-029-NCZ035>037-056-057-068>072-082-502-504- 506>510-SCZ001>014-019-240245- RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL- DAVIE-CATAWBA-ROWAN-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS- UNION NC-GREATER CALDWELL-GREATER BURKE-EASTERN MCDOWELL- RUTHERFORD MOUNTAINS-GREATER RUTHERFORD-POLK MOUNTAINS-EASTERN POLK- OCONEE MOUNTAINS-PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- GREATER OCONEE-GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG- CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD- 1045 PM EDT SUN APR 22 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. AS THE PRESSURE GRADIENT TIGHTENS OVER THE REGION...STRONG AND GUSTY WINDS ARE EXPECTED ON MONDAY...POSSIBLY GUSTING AS HIGH AS 35 MPH ARE POSSIBLE ACROSS THE AREA. TEMPERATURES WILL LIKELY DROP INTO THE MID 30S TO LOW 30S EARLY TUESDAY MORNING. AREAS OF FROST ARE POSSIBLE IF WINDS BECOME LIGHT ENOUGH OVERNIGHT. .SPOTTER INFORMATION STATEMENT... NONE. NCZ048>053-058-059-062>065-501-503-505-240245- MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM- NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON- CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- 1045 PM EDT SUN APR 22 2012 ...WIND ADVISORY IN EFFECT FROM 7 AM TO 9 PM EDT MONDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA. .DAY ONE...TONIGHT. SCATTERED SNOW SHOWERS ARE EXPECTED TO DEVELOP ACROSS THE HIGHER ELEVATIONS ALONG THE TENNESSEE BORDER TONIGHT...CONTINUING INTO EARLY MONDAY. LIGHT ACCUMULATIONS OF SNOW WILL BE POSSIBLE...MAINLY ABOVE 3500 FEET. .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. WIND ADVISORY. FREEZING TEMPERATURES ARE EXPECTED ONCE AGAIN MONDAY NIGHT IN THE HIGHER ELEVATIONS...WHILE THERE WILL BE A GREATER POTENTIAL FOR SOME SHELTERED VALLEYS TO SEE FREEZING TEMPERATURES AS WELL. .SPOTTER INFORMATION STATEMENT... NONE. NCZ033-240245- AVERY- 1045 PM EDT SUN APR 22 2012 ...FREEZE WARNING IN EFFECT UNTIL 9 AM EDT MONDAY... ...WIND ADVISORY IN EFFECT FROM 7 AM TO 9 PM EDT MONDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FREEZE WARNING. SCATTERED SNOW SHOWERS ARE EXPECTED TO DEVELOP ACROSS THE AREA TONIGHT...CONTINUING INTO EARLY MONDAY. LIGHT ACCUMULATIONS OF SNOW WILL BE POSSIBLE...MAINLY ABOVE 3500 FEET. .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. FREEZE WARNING. WIND ADVISORY. FREEZING TEMPERATURES ARE EXPECTED ONCE AGAIN MONDAY NIGHT IN THE HIGHER ELEVATIONS...WHILE THERE WILL BE A GREATER POTENTIAL FOR SOME SHELTERED VALLEYS TO SEE FREEZING TEMPERATURES AS WELL. .SPOTTER INFORMATION STATEMENT... NONE. KRENTZ
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 9:55 PM EDT | Freeze Warning | GSP | Avery | 11 hr |
| Apr 22, 10:22 PM EDT | Wind Advisory | GSP | Avery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more | 23 hr |
Nearby
Freeze Warnings in North Carolina, 2012Every freeze warning in 2012
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.