Spot Forecast
Issued by NWS Greer, SC

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 
000
FNUS72 KGSP 250921
FWSGSP

Spot Forecast for GW-TNC North Saluda...TNC
National Weather Service Greenville-Spartanburg SC
521 AM EDT Thu Apr 25 2024

Forecast is based on ignition time of 0600 EDT on April 25.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
High pressure moving past to the north will give us a fair and sunny day
with RH dropping down to the 30-35 percent range this afternoon. The
main concern will be the winds. Although speed will be light, the wind
direction is expected to be a northerly downslope/drainage wind at
daybreak but will steadily veer to northeast and east through midday,
and then south to southwest and upslope in the mid afternoon. The
transport wind will show the same behavior, and could veer a bit
quicker, but will also be less than 10 mph. Note that the winds seen
in the morning FWF represent a 12-hour average over several forecast
zones, whereas a Spot Forecast has information specific to the location
of the burn, so the Spot is more detailed.

Around sunset, the light wind will return to a downslope drainage flow,
most likely northeast or north. Clouds will increase overnight and
moisture will recover. Friday looks cloudy and cool with a chance of
light rain, thus fairly high afternoon RH. Rain amounts will be less
than a tenth of an inch if it rains at all. Wind should be east to
northeast with confidence.

.TODAY...

Sky/weather.........Sunny (10-20 percent).
Max temperature.....Around 74.
Min humidity........34 percent.
Wind (20 ft)........North winds 5 to 6 mph shifting to the
                    northeast around 5 mph late in the morning,
                    then becoming light early in the afternoon
                    becoming south around 6 mph late in the
                    afternoon.
Mixing height.......6300 ft AGL.
Transport winds.....North 8 to 12 mph shifting to the east 6 to 7
                    mph late in the morning, then shifting to the
                    southwest 6 to 8 mph in the afternoon.
Smoke dispersal.....Poor (4000 knot-ft) early in the morning
                    increasing to good (44000 knot-ft) in the
                    afternoon.
LVORI...............3.
ADI.................5 early in the morning increasing to 62 in the
                    afternoon.
Stability class.....3.
Pcpn amount.........0.00 inches.
Ceiling (FT)........24000.
Visibility (SM).....9.
Sfc pressure (in)...28.38.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........0   0   2   2   2   3   8   20  12  14  17  26
Weather cov.....
Weather type....
Tstm cov........
Temp............48  49  50  55  60  64  67  70  71  71  73  73
Dewpoint........42  42  42  43  44  43  43  43  42  43  43  44
RH..............79  79  74  64  55  46  41  38  36  36  34  35
20 FT wind dir..N   N   N   N   NE  NE  E   E   SE  SE  S   S
20 FT wind spd..6   6   5   5   5   5   3   3   2   3   6   6
20 FT wind gust.10  9   9   8   8   9   7   6   5   7   9   12
Mix hgt (kft)...0.4 0.4 0.4 0.9 3.0 4.4 5.2 5.7 6.1 6.2 6.3 6.1
Transp wind dir.N   N   N   N   NE  NE  E   SW  SW  SW  SW  SW
Transp wind spd.12  12  10  9   8   7   6   6   7   7   8   8
LVORI...........4   4   3   2   1   1   1   1   1   1   1   1
ADI.............5   11  10  11  31  39  37  40  52  52  62  55
VRate kt-ft/10005   4   4   7   21  27  26  28  37  38  44  43
Ceiling (hft)...250 250 250 250 250 250 250 250 250 240 240 240
Visibility (sm).9   9   9   10  10  10  10  10  10  10  10  10
Sfc pres (in)...840 841 842 843 843 844 843 843 842 841 840 838

.TONIGHT...

Sky/weather.........Partly cloudy (35-45 percent) then becoming
                    mostly cloudy (60-70 percent).
Min temperature.....Around 52.
Max humidity........83 percent.
Wind (20 ft)........South winds around 6 mph early in the evening
                    becoming light, then becoming northeast 5 to 7
                    mph after 3 am.
Mixing height.......400 ft AGL.
Transport winds.....South 6 to 9 mph shifting to the northeast 5 to
                    12 mph late in the evening.
Smoke dispersal.....Good (43900 knot-ft) early in the evening
                    decreasing to poor (1800 knot-ft) late in the
                    night.
LVORI...............3.
ADI.................57 early in the evening decreasing to 2 late in
                    the night.
Stability class.....4.
Pcpn amount.........0.00 inches.
Ceiling (FT)........21000 decreasing to 11000.
Visibility (SM).....10.
Sfc pressure (in)...28.39.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........35  43  52  60  77  69  62  50  49  50  52  54
Weather cov.....
Weather type....
Tstm cov........
Temp............71  69  64  62  60  59  58  57  56  55  54  53
Dewpoint........45  46  47  46  46  46  46  45  45  45  46  46
RH..............39  43  53  56  59  62  64  66  67  70  73  76
20 FT wind dir..S   S   S   S   N   N   N   NE  NE  NE  NE  NE
20 FT wind spd..6   6   3   2   1   2   3   3   3   5   6   7
20 FT wind gust.10  9   7   3   2   5   6   6   7   8   9   12
Mix hgt (kft)...5.5 2.0 0.5 0.5 0.5 0.4 0.4 0.4 0.5 0.5 0.5 0.5
Transp wind dir.SW  S   S   S   SE  NE  NE  E   E   E   NE  NE
Transp wind spd.9   7   6   6   6   5   6   6   7   8   10  12
LVORI...........1   2   2   3   3   3   3   3   3   3   3   4
ADI.............57  5   4   3   3   2   3   3   5   5   7   8
VRate kt-ft/100044  12  2   2   2   2   2   2   3   4   5   5
Ceiling (hft)...240 240 240 220 220 210 220 160 130 120 120 110
Visibility (sm).10  10  10  10  10  10  10  10  10  10  10  10
Sfc pres (in)...839 839 840 841 843 844 844 843 843 843 843 843

.FRIDAY...

Sky/weather.........Mostly cloudy (75-85 percent). Slight chance of
                    rain.
Max temperature.....Around 63.
Min humidity........69 percent.
Wind (20 ft)........East winds 7 to 9 mph.
Mixing height.......1800 ft AGL.
Transport winds.....East 8 to 14 mph.
Smoke dispersal.....Poor (5300 knot-ft) early in the morning
                    increasing to fair (14400 knot-ft) in the
                    afternoon.
LVORI...............4.
ADI.................11 to 21.
Stability class.....3.
Pcpn amount.........0.03 inches.
Ceiling (FT)........9000 decreasing to 1700.
Visibility (SM).....10 early in the morning.
Sfc pressure (in)...28.45.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........66  78  84  84  84  85  86  87  88  90  92  93
Weather cov.....    SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH
Weather type....    RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN
Tstm cov........
Temp............53  52  53  54  55  58  59  61  62  63  63  63
Dewpoint........46  47  48  49  50  51  51  52  52  53  53  53
RH..............79  82  81  83  81  77  75  72  70  69  69  71
20 FT wind dir..NE  NE  NE  NE  E   E   E   E   E   E   E   E
20 FT wind spd..8   9   9   9   8   8   8   8   7   7   7   7
20 FT wind gust.14  16  15  15  14  14  13  13  13  12  12  12
Mix hgt (kft)...0.5 0.5 1.1 1.4 1.4 1.5 1.5 1.7 1.8 1.4 1.4 1.5
Transp wind dir.NE  NE  NE  E   E   E   E   E   E   E   E   E
Transp wind spd.13  14  13  12  10  9   9   9   9   8   8   8
LVORI...........4   4   3   4   3   3   3   3   3   3   3   3
ADI.............11  11  16  20  18  18  18  19  21  15  15  15
VRate kt-ft/10005   6   12  14  12  12  12  13  14  10  10  10
Ceiling (hft)...90  60  29  17  17  17  17  17  17  17  17  17
Visibility (sm).10  10  10
Sfc pres (in)...845 848 850 852 853 855 855 855 855 854 853 853

$$
Forecaster...Pat Moore
Requested by...Yeatman
Type of request...PRESCRIBED
.TAG 2412333.0/GSP
.DELDT 04/25/24
.FormatterVersion 2.0.0
USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.