Alert archive / South Carolina / Frost Advisories in 2017

Frost Advisory 2, NWS Greenville-Spartanburg, SC

March 19, 20174 counties in North Carolina; 8 counties in South Carolina; 4 counties in Georgia

NWS Greenville-Spartanburg, SC issued this frost advisory at Mar 19, 2017, 4:10 AM EDT for 4 counties in North Carolina; 8 counties in South Carolina; 4 counties in Georgia. It took effect at Mar 20, 2017, 12:00 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Mar 19, 2017, 4:10 AM EDT (08:10 UTC)
In effect from
Mar 20, 2017, 12:00 AM EDT
Expired
Mar 20, 2017, 9:00 AM EDT
In force
9 hr
Issued by
NWS Greenville-Spartanburg, SC

Counties Elbert County, GA, Franklin County, GA, Hart County, GA, Stephens County, GA, Gaston County, NC, Mecklenburg County, NC, Polk County, NC, Union County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 30 km from the middle of the area, began a volume at 08:09 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, 8.2 hours before the alert went out and 245 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.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 2017-03-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2017-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
47 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
2240 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
42 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

037 
WWUS72 KGSP 190810
NPWGSP

URGENT - WEATHER MESSAGE
National Weather Service Greenville-Spartanburg SC
410 AM EDT Sun Mar 19 2017

...FROSTY CONDITIONS WITH FREEZING TEMPERATURES TONIGHT...

.A cold airmass moves into the area today and remains in place
tonight. Light winds and clear skies will lead to areas of frost
and freezing temperatures.

NCZ035>037-056-057-068-069-072-502-504-506-508-191615-
/O.NEW.KGSP.FZ.W.0008.170320T0400Z-170320T1300Z/
Alexander-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Cabarrus-
Greater Caldwell-Greater Burke-Eastern McDowell-
Greater Rutherford-
Including the cities of Bethlehem, Ellendale, Millersville, 
Taylorsville, Hiddenite, Stony Point, Statesville, Mooresville, 
Farmington, Fork Church, Mocksville, Advance, Hickory, Newton, 
St. Stephens, Salisbury, Shelby, Kings Mountain, Lincolnton, 
Crouse, Concord, Kannapolis, Kings Creek, Lenoir, Sawmills, 
Granite Falls, Morganton, Pleasant Grove, Valdese, Marion, Nebo, 
Dysartsville, Fero, Glenwood, Forest City, Rutherfordton, 
and Spindale
410 AM EDT Sun Mar 19 2017

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT
MONDAY...

The National Weather Service in Greenville-Spartanburg has issued
a Freeze Warning, which is in effect from midnight tonight to
9 AM EDT Monday.

* LOCATIONS...The Northern Foothills and Northwest Piedmont of
  North Carolina, and portions of the Southern Foothills and
  Piedmont.

* TEMPERATURES...Lows around freezing.

* IMPACTS...Crops and flowering plants are very likely be damaged
  if not protected from these cold temperatures..

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

GAZ018-026-028-029-NCZ070-071-082-510-SCZ004>014-019-191615-
/O.NEW.KGSP.FR.Y.0002.170320T0400Z-170320T1300Z/
Stephens-Franklin-Hart-Elbert-Gaston-Mecklenburg-Union-
Eastern Polk-Greater Oconee-Greater Pickens-Greater Greenville-
Spartanburg-Cherokee-York-Anderson-Abbeville-Laurens-Chester-
Greenwood-
Including the cities of Boydville, Toccoa, Royston, Lavonia, 
Franklin Springs, Canon, Hartwell, Nuberg, Reed Creek, Elberton, 
Fortsonia, Middleton, Ruckersville, Gastonia, Charlotte, Monroe, 
Trinity, Indian Trail, Weddington, Tryon, Columbus, Mill Spring, 
Seneca, Oakway, Easley, Dacusville, Clemson, Greenville, Taylors,
Greer, Mauldin, Fork Shoals, Simpsonville, Berea, Spartanburg, 
Gaffney, Catawba, Rock Hill, Anderson, Abbeville, Calhoun Falls, 
Laurens, Clinton, Union, Monarch Mills, Chester, Cornwell, 
Great Falls, Ware Shoals, and Ninety Six
410 AM EDT Sun Mar 19 2017

...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT
MONDAY...

The National Weather Service in Greenville-Spartanburg has issued
a Frost Advisory, which is in effect from midnight tonight to
9 AM EDT Monday.

* LOCATIONS...Much of the Southern Foothills and Piedmont of North
  Carolina, and the foothills and piedmont of Upstate South
  Carolina and Northeast Georgia.

* TEMPERATURES...Lows in the lower to mid 30s.

* WINDS...Northeast 5 mph or less.

* IMPACTS....Crops and flowering plants are very likely be damaged
  if not protected from these cold temperatures and frosty
  conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
5 follow-up statements
350 
WWUS72 KGSP 191603
NPWGSP

URGENT - WEATHER MESSAGE
National Weather Service Greenville-Spartanburg SC
1203 PM EDT Sun Mar 19 2017

...FROSTY CONDITIONS WITH FREEZING TEMPERATURES TONIGHT...

.A cool airmass will remain in place tonight. Light winds and 
clear skies will lead to areas of frost and freezing temperatures.

NCZ035>037-056-057-068-069-072-502-504-506-508-192000-
/O.CON.KGSP.FZ.W.0008.170320T0400Z-170320T1300Z/
Alexander-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Cabarrus-
Greater Caldwell-Greater Burke-Eastern McDowell-
Greater Rutherford-
Including the cities of Bethlehem, Ellendale, Millersville, 
Taylorsville, Hiddenite, Stony Point, Statesville, Mooresville, 
Farmington, Fork Church, Mocksville, Advance, Hickory, Newton, 
St. Stephens, Salisbury, Shelby, Kings Mountain, Lincolnton, 
Crouse, Concord, Kannapolis, Kings Creek, Lenoir, Sawmills, 
Granite Falls, Morganton, Pleasant Grove, Valdese, Marion, Nebo, 
Dysartsville, Fero, Glenwood, Forest City, Rutherfordton, 
and Spindale
1203 PM EDT Sun Mar 19 2017

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
EDT MONDAY...

* LOCATIONS...The Northern Foothills and Northwest Piedmont of 
  North Carolina, and portions of the Southern Foothills and 
  Piedmont.

* TEMPERATURES...Lows in the lower 30s.

* IMPACTS...Crops and flowering plants are very likely be damaged
  if not protected from these cold temperatures.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

GAZ018-026-028-029-NCZ070-071-082-510-SCZ004>014-019-192000-
/O.CON.KGSP.FR.Y.0002.170320T0400Z-170320T1300Z/
Stephens-Franklin-Hart-Elbert-Gaston-Mecklenburg-Union-
Eastern Polk-Greater Oconee-Greater Pickens-Greater Greenville-
Spartanburg-Cherokee-York-Anderson-Abbeville-Laurens-Chester-
Greenwood-
Including the cities of Boydville, Toccoa, Royston, Lavonia, 
Franklin Springs, Canon, Hartwell, Nuberg, Reed Creek, Elberton, 
Fortsonia, Middleton, Ruckersville, Gastonia, Charlotte, Monroe, 
Trinity, Indian Trail, Weddington, Tryon, Columbus, Mill Spring, 
Seneca, Oakway, Easley, Dacusville, Clemson, Greenville, Taylors,
Greer, Mauldin, Fork Shoals, Simpsonville, Berea, Spartanburg, 
Gaffney, Catawba, Rock Hill, Anderson, Abbeville, Calhoun Falls, 
Laurens, Clinton, Union, Monarch Mills, Chester, Cornwell, 
Great Falls, Ware Shoals, and Ninety Six
1203 PM EDT Sun Mar 19 2017

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

* LOCATIONS...Much of the Southern Foothills and Piedmont of 
  North Carolina, and the foothills and piedmont of Upstate 
  South Carolina and Northeast Georgia.

* TEMPERATURES...Lows in the mid 30s.

* WINDS...Northeast 5 mph or less.

* IMPACTS...Crops and flowering plants are very likely be damaged
  if not protected from these cold temperatures and frosty
  conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
Lane
043 
WWUS72 KGSP 191845
NPWGSP

URGENT - WEATHER MESSAGE
National Weather Service Greenville-Spartanburg SC
245 PM EDT Sun Mar 19 2017

...FROSTY CONDITIONS WITH FREEZING TEMPERATURES TONIGHT...

.A cool airmass will remain in place tonight. Light winds and
clear skies will lead to areas of frost and freezing
temperatures.

NCZ035>037-056-057-068-069-072-502-504-506-508-200300-
/O.CON.KGSP.FZ.W.0008.170320T0400Z-170320T1300Z/
Alexander-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Cabarrus-
Greater Caldwell-Greater Burke-Eastern McDowell-
Greater Rutherford-
Including the cities of Bethlehem, Ellendale, Millersville, 
Taylorsville, Hiddenite, Stony Point, Statesville, Mooresville, 
Farmington, Fork Church, Mocksville, Advance, Hickory, Newton, 
St. Stephens, Salisbury, Shelby, Kings Mountain, Lincolnton, 
Crouse, Concord, Kannapolis, Kings Creek, Lenoir, Sawmills, 
Granite Falls, Morganton, Pleasant Grove, Valdese, Marion, Nebo, 
Dysartsville, Fero, Glenwood, Forest City, Rutherfordton, 
and Spindale
245 PM EDT Sun Mar 19 2017

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
EDT MONDAY...

* LOCATIONS...The Northern Foothills and Northwest Piedmont of 
  North Carolina, and portions of the Southern Foothills and 
  Piedmont.

* TEMPERATURES...Lows in the lower 30s.

* IMPACTS...Crops and flowering plants are very likely be damaged
  if not protected from these cold temperatures.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

GAZ018-026-028-029-NCZ070-071-082-510-SCZ004>014-019-200300-
/O.CON.KGSP.FR.Y.0002.170320T0400Z-170320T1300Z/
Stephens-Franklin-Hart-Elbert-Gaston-Mecklenburg-Union-
Eastern Polk-Greater Oconee-Greater Pickens-Greater Greenville-
Spartanburg-Cherokee-York-Anderson-Abbeville-Laurens-Chester-
Greenwood-
Including the cities of Boydville, Toccoa, Royston, Lavonia, 
Franklin Springs, Canon, Hartwell, Nuberg, Reed Creek, Elberton, 
Fortsonia, Middleton, Ruckersville, Gastonia, Charlotte, Monroe, 
Trinity, Indian Trail, Weddington, Tryon, Columbus, Mill Spring, 
Seneca, Oakway, Easley, Dacusville, Clemson, Greenville, Taylors,
Greer, Mauldin, Fork Shoals, Simpsonville, Berea, Spartanburg, 
Gaffney, Catawba, Rock Hill, Anderson, Abbeville, Calhoun Falls, 
Laurens, Clinton, Union, Monarch Mills, Chester, Cornwell, 
Great Falls, Ware Shoals, and Ninety Six
245 PM EDT Sun Mar 19 2017

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

* LOCATIONS...Much of the Southern Foothills and Piedmont of 
  North Carolina, and the foothills and piedmont of Upstate 
  South Carolina and Northeast Georgia.

* TEMPERATURES...Lows in the mid 30s. highs around 70.

* WINDS...North 5 mph or less.

* IMPACTS...Crops and flowering plants are very likely be damaged
  if not protected from these cold temperatures and frosty
  conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
Lane
275 
WWUS72 KGSP 200136
NPWGSP

URGENT - WEATHER MESSAGE
National Weather Service Greenville-Spartanburg SC
936 PM EDT Sun Mar 19 2017

...FROSTY CONDITIONS WITH FREEZING TEMPERATURES OVERNIGHT...

.A cool airmass will remain in place overnight. Light winds and 
clear skies will lead to areas of frost and freezing temperatures.

NCZ035>037-056-057-068-069-072-502-504-506-508-201100-
/O.CON.KGSP.FZ.W.0008.170320T0400Z-170320T1300Z/
Alexander-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Cabarrus-
Greater Caldwell-Greater Burke-Eastern McDowell-
Greater Rutherford-
Including the cities of Bethlehem, Ellendale, Millersville, 
Taylorsville, Hiddenite, Stony Point, Statesville, Mooresville, 
Farmington, Fork Church, Mocksville, Advance, Hickory, Newton, 
St. Stephens, Salisbury, Shelby, Kings Mountain, Lincolnton, 
Crouse, Concord, Kannapolis, Kings Creek, Lenoir, Sawmills, 
Granite Falls, Morganton, Pleasant Grove, Valdese, Marion, Nebo, 
Dysartsville, Fero, Glenwood, Forest City, Rutherfordton, 
and Spindale
936 PM EDT Sun Mar 19 2017

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT MONDAY...

* LOCATIONS...The Northern Foothills and Northwest Piedmont of 
  North Carolina, and portions of the Southern Foothills and 
  Piedmont.

* TEMPERATURES...Lows in the lower 30s. 

* IMPACTS...Crops and flowering plants are very likely to be 
  damaged if not protected from these cold temperatures.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

GAZ018-026-028-029-NCZ070-071-082-510-SCZ004>014-019-201100-
/O.CON.KGSP.FR.Y.0002.170320T0400Z-170320T1300Z/
Stephens-Franklin-Hart-Elbert-Gaston-Mecklenburg-Union-
Eastern Polk-Greater Oconee-Greater Pickens-Greater Greenville-
Spartanburg-Cherokee-York-Anderson-Abbeville-Laurens-Chester-
Greenwood-
Including the cities of Boydville, Toccoa, Royston, Lavonia, 
Franklin Springs, Canon, Hartwell, Nuberg, Reed Creek, Elberton, 
Fortsonia, Middleton, Ruckersville, Gastonia, Charlotte, Monroe, 
Trinity, Indian Trail, Weddington, Tryon, Columbus, Mill Spring, 
Seneca, Oakway, Easley, Dacusville, Clemson, Greenville, Taylors,
Greer, Mauldin, Fork Shoals, Simpsonville, Berea, Spartanburg, 
Gaffney, Catawba, Rock Hill, Anderson, Abbeville, Calhoun Falls, 
Laurens, Clinton, Union, Monarch Mills, Chester, Cornwell, 
Great Falls, Ware Shoals, and Ninety Six
936 PM EDT Sun Mar 19 2017

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT MONDAY...

* LOCATIONS...Much of the Southern Foothills and Piedmont of 
  North Carolina, and the foothills and piedmont of Upstate 
  South Carolina and Northeast Georgia.

* TEMPERATURES...Lows in the mid 30s. 

* WINDS...North 5 mph or less.

* IMPACTS...Crops and flowering plants are very likely to be
  damaged if not protected from these cold temperatures and 
  frosty conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$

SBK
675 
WWUS72 KGSP 200844
NPWGSP

URGENT - WEATHER MESSAGE
National Weather Service Greenville-Spartanburg SC
444 AM EDT Mon Mar 20 2017

...FROSTY CONDITIONS WITH FREEZING TEMPERATURES EARLY THIS MORNING...

.A cool airmass will settle into the region this morning. Light 
winds and clear skies will lead to areas of frost and freezing 
temperatures.

NCZ035>037-056-057-068-069-072-502-504-506-508-201300-
/O.CON.KGSP.FZ.W.0008.000000T0000Z-170320T1300Z/
Alexander-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Cabarrus-
Greater Caldwell-Greater Burke-Eastern McDowell-
Greater Rutherford-
Including the cities of Bethlehem, Ellendale, Millersville, 
Taylorsville, Hiddenite, Stony Point, Statesville, Mooresville, 
Farmington, Fork Church, Mocksville, Advance, Hickory, Newton, 
St. Stephens, Salisbury, Shelby, Kings Mountain, Lincolnton, 
Crouse, Concord, Kannapolis, Kings Creek, Lenoir, Sawmills, 
Granite Falls, Morganton, Pleasant Grove, Valdese, Marion, Nebo, 
Dysartsville, Fero, Glenwood, Forest City, Rutherfordton, 
and Spindale
444 AM EDT Mon Mar 20 2017

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING...

* LOCATIONS...The Northern Foothills and Northwest Piedmont of 
  North Carolina, and portions of the Southern Foothills and 
  Piedmont.

* TEMPERATURES...Lows in the lower 30s.

* IMPACTS...Crops and flowering plants are very likely to be 
  damaged if not protected from these cold temperatures.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

GAZ018-026-028-029-NCZ070-071-082-510-SCZ004>014-019-201300-
/O.CON.KGSP.FR.Y.0002.000000T0000Z-170320T1300Z/
Stephens-Franklin-Hart-Elbert-Gaston-Mecklenburg-Union-
Eastern Polk-Greater Oconee-Greater Pickens-Greater Greenville-
Spartanburg-Cherokee-York-Anderson-Abbeville-Laurens-Chester-
Greenwood-
Including the cities of Boydville, Toccoa, Royston, Lavonia, 
Franklin Springs, Canon, Hartwell, Nuberg, Reed Creek, Elberton, 
Fortsonia, Middleton, Ruckersville, Gastonia, Charlotte, Monroe, 
Trinity, Indian Trail, Weddington, Tryon, Columbus, Mill Spring, 
Seneca, Oakway, Easley, Dacusville, Clemson, Greenville, Taylors,
Greer, Mauldin, Fork Shoals, Simpsonville, Berea, Spartanburg, 
Gaffney, Catawba, Rock Hill, Anderson, Abbeville, Calhoun Falls, 
Laurens, Clinton, Union, Monarch Mills, Chester, Cornwell, 
Great Falls, Ware Shoals, and Ninety Six
444 AM EDT Mon Mar 20 2017

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

* LOCATIONS...Much of the Southern Foothills and Piedmont of 
  North Carolina, and the foothills and piedmont of Upstate 
  South Carolina and Northeast Georgia.

* TEMPERATURES...Lows in the mid 30s.

* WINDS...North 5 mph or less.

* IMPACTS...Crops and flowering plants are very likely to be 
  damaged if not protected from these cold temperatures and 
  frosty conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
152 
WWUS72 KGSP 201259
NPWGSP

URGENT - WEATHER MESSAGE
National Weather Service Greenville-Spartanburg SC
859 AM EDT Mon Mar 20 2017

...TEMPERATURES WARMING AS EXPECTED...

.Temperatures have warmed above freezing in virtually all
locations. The Freeze Warning and Frost Advisory are being allowed
to expire at their scheduled time.

NCZ035>037-056-057-068-069-072-502-504-506-508-201400-
/O.EXP.KGSP.FZ.W.0008.000000T0000Z-170320T1300Z/
Alexander-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Cabarrus-
Greater Caldwell-Greater Burke-Eastern McDowell-
Greater Rutherford-
Including the cities of Bethlehem, Ellendale, Millersville, 
Taylorsville, Hiddenite, Stony Point, Statesville, Mooresville, 
Farmington, Fork Church, Mocksville, Advance, Hickory, Newton, 
St. Stephens, Salisbury, Shelby, Kings Mountain, Lincolnton, 
Crouse, Concord, Kannapolis, Kings Creek, Lenoir, Sawmills, 
Granite Falls, Morganton, Pleasant Grove, Valdese, Marion, Nebo, 
Dysartsville, Fero, Glenwood, Forest City, Rutherfordton, 
and Spindale
859 AM EDT Mon Mar 20 2017

...FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING...

The threat of freezing temperatures has passed. Expect high
temperatures today in the mid 60s.

$$

GAZ018-026-028-029-NCZ070-071-082-510-SCZ004>014-019-201400-
/O.EXP.KGSP.FR.Y.0002.000000T0000Z-170320T1300Z/
Stephens-Franklin-Hart-Elbert-Gaston-Mecklenburg-Union-
Eastern Polk-Greater Oconee-Greater Pickens-Greater Greenville-
Spartanburg-Cherokee-York-Anderson-Abbeville-Laurens-Chester-
Greenwood-
Including the cities of Boydville, Toccoa, Royston, Lavonia, 
Franklin Springs, Canon, Hartwell, Nuberg, Reed Creek, Elberton, 
Fortsonia, Middleton, Ruckersville, Gastonia, Charlotte, Monroe, 
Trinity, Indian Trail, Weddington, Tryon, Columbus, Mill Spring, 
Seneca, Oakway, Easley, Dacusville, Clemson, Greenville, Taylors,
Greer, Mauldin, Fork Shoals, Simpsonville, Berea, Spartanburg, 
Gaffney, Catawba, Rock Hill, Anderson, Abbeville, Calhoun Falls, 
Laurens, Clinton, Union, Monarch Mills, Chester, Cornwell, 
Great Falls, Ware Shoals, and Ninety Six
859 AM EDT Mon Mar 20 2017

...FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING...

Any remaining frost will melt within an hour or so as temperatures
warm.

$$
Wimberley

What forecasters said that day

The local office's own words before this frost 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 frost advisory went out at Mar 19, 3:52 AM EDT, 18 minutes earlier.

Area forecast discussion, Mar 19, 3:52 AM EDT, 18 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
352 AM EDT Sun Mar 19 2017

.SYNOPSIS...
Dry high pressure will build into the region today, and settle over
the Southeast states through Monday. Another cold front will
approach the forecast area Tuesday into Wednesday, increasing
chances for rain and thunderstorms.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 330 AM EDT: Low clouds and isolated very light snow showers
will linger across the mountains through daybreak. The snow showers
end after daybreak but the clouds will only slowly dissipate through
the day. Low clouds will spill out of the mountains and across the
foothills and piedmont early this morning and dissipate by
afternoon. Gusty N to NW winds will also continue across the area
through the morning then slowly diminish through the afternoon. The
highest peaks may see some advisory level wind gusts, but they
should remain below advisory level elsewhere, even with some
occasional stronger gusts from time to time. Highs will be around 5
degrees below normal as a cooler and drier air mass moves in.

The center of surface high pressure builds in and settles across the
area tonight. This leads to a relaxed pressure gradient and light
and variable winds. There could be a little cirrus from time to time
overnight keeping lows from bottoming out. Even so, guidance shows
lows falling to around 5 degrees below normal. Local COOP MOS
suggests lows could even be colder in some areas. Therefore, will
trend to the pessimistic side and issue a Freeze Warning for the NC
Northern Foothills, NW Piedmont, and Rutherford, Cleveland, Lincoln,
and Cabarrus Counties. Will issue a Frost Advisory for the rest of
the non-mountain counties. Cannot rule out a freeze in the normally
colder or more sheltered locations in the advisory, and the warning
may need expanding later in response.

&&

.SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/...
As of 300 AM EDT Sunday: an broad upper trough will cross the
Northern Plains on Monday, then dig as it enters the Great Lakes on
Tuesday. After a cool start to the day Monday morning, temps will
rebound to about 5 degrees above normal under mostly sunny skies. A
front will push into the Ohio Valley on Monday, then slow down as it
approaches the CWFA Monday night. Model guidance agrees that the air
mass south of the front will become moderately unstable, with
showers and storms just to our NW Monday, some of which will move
into the NC mountains overnight. Confidence is not real high that
much of that activity will survive over the mountains, so PoPs will
remain confined to the mountains. Lows will be well above normal.

Tuesday, there will be a weak low pressure wave that will try to
develop along the front as it pushes into NC from the north. This
may enhance SWLY flow across GA and the Upstate and pool some
mid-upr 50 dewpts. This in combination with steep mid-level lapse
rates may result in 1000-2000 J/kg of SBCAPE by late afternoon.
Forcing will remain modest at best, as most of the better DPVA will
remain north of the area. Still expect scattered to numerous showers
and tstms to develop along and ahead of the front as it lays over
the area Tuesday afternoon and evening. Severe storms may be
possible, as 0-6 km bulk shear will be 30-40 kts along the front. A
marginal risk has been added to the Day 3 Convective outlook by SPC
for portions our western 2/3rds of the area. Highs will be well
above normal as the front approaches, with mid 70s to lower 80s
across most of the piedmont.

Tuesday night, the front will sag south thru the area with
convection shifting south. However, lift will linger atop the
frontal zone, so PoPs will be slow to decrease overnight. Temps will
remain well above normal under clouds and precip.

&&

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...
As of 330 AM Sunday: a large and fairly strong area of high pressure
will drop southeast into Great Lakes and push the front south of the
area on Wednesday. The high will bring thicknesses down as cold air
damming develops east of the mountains. It's uncertain how much
clearing there will be, as the GFS shows lingering low-level
moisture and bringing the flow around out of the east. Highs will be
at or slightly below normal.

An upper ridge will track east across the CONUS Thursday and set up
along the East Coast on Friday. Then a trough will eject out into
Plains on Saturday. The surface high will migrate off the
Mid-Atlantic coast and keep a wedge across the area Thursday and
Friday. Southerly upglide flow will set up atop the wedge and keep
the forecast area mostly cloudy with a gradual increase in PoPs. The
medium range guidance is now advertising a split in the trough, with
the southern stream trough possibly closing off into an upper over
the lower Mississippi Valley. This results in a delayed arrival of
the next front, which was expected to push into the area on
Saturday. Either way, the upcoming weekend does look unsettled with
chance to likely PoPs and cool temps.

&&

.AVIATION /08Z SUNDAY THROUGH THURSDAY/...
At KCLT and Elsewhere: Returning low level moisture from the
northwest will produce some upslope cloudiness in the western
mountains, with VFR cigs this morning at KAVL. The clouds will spill
out of the mountains with VFR cigs at KHKY and sct to few elsewhere.
KCLT could see a brief cig through daybreak. N to NW winds will
continue through daybreak then become gusty after daybreak. KAVL
will see very gusty winds through the afternoon. The low clouds
scatter out through the afternoon leaving only cirrus for the
evening. Winds turn NNE and taper off during the evening.

Outlook: A drier airmass will return behind the front through at
least Monday. Another cold front may bring scattered showers and
perhaps a few thunderstorms on Tuesday, and possibly into Wed.

Confidence Table...

            08-14Z        14-20Z        20-02Z        02-06Z
KCLT       High 100%     High 100%     High 100%     High 100%
KGSP       High 100%     High 100%     High 100%     High 100%
KAVL       High 100%     High 100%     High 100%     High 100%
KHKY       High 100%     High 100%     High 100%     High 100%
KGMU       High 100%     High 100%     High 100%     High 100%
KAND       High 100%     High 100%     High 100%     High 100%

The percentage reflects the number of guidance members agreeing
with the scheduled TAF issuance flight rule category. Complete hourly
experimental aviation forecast consistency tables and ensemble forecasts
are available at the following link:

www.weather.gov/gsp/aviation

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...Frost Advisory from midnight tonight to 9 AM EDT Monday for
     GAZ018-026-028-029.
NC...Frost Advisory from midnight tonight to 9 AM EDT Monday for
     NCZ070-071-082-510.
     Freeze Warning from midnight tonight to 9 AM EDT Monday for
     NCZ035>037-056-057-068-069-072-502-504-506-508.
SC...Frost Advisory from midnight tonight to 9 AM EDT Monday for
     SCZ004>014-019.

&&

SYNOPSIS...ARK
NEAR TERM...RWH
SHORT TERM...ARK
LONG TERM...ARK
AVIATION...RWH
Hazardous weather outlook, Mar 18, 7:11 PM EDT, 8 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
711 PM EDT Sat Mar 18 2017

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-192315-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Avery-Alexander-
Iredell-Davie-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Catawba-
Rowan-Graham-Northern Jackson-Macon-Southern Jackson-Transylvania-
Henderson-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union-
Caldwell Mountains-Greater Caldwell-Burke Mountains-Greater Burke-
McDowell Mountains-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-Chester-Greenwood-
711 PM EDT Sat Mar 18 2017

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 at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

..Sunday...No hazardous weather is expected at this time.
..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

HG

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 19, 4:10 AM EDTFreeze WarningGSPAlexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 6 more29 hr

Nearby

Frost Advisories in South Carolina, 2017Frost Advisories in North Carolina, 2017Frost Advisories in Georgia, 2017Every frost advisory in 2017

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.