Suppression Forecast
Issued by NWS Jackson, KY

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000
FNUS73 KJKL 191100
FWSJKL

Spot Forecast for Sandhill RX...USFS
National Weather Service Jackson, KY
700 AM EDT Thu Apr 19 2018

Forecast is based on ignition time of 0700 EDT on April 19.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...A much cooler airmass will reside across the burn
site today as gusty northwest winds result in temperatures
topping out in the low 50s this afternoon. Widespread frost will
occur tonight into Friday morning as RHs recover into the 90s.
Drier air will filter in Friday as high pressure takes control.
Minimum RHs will drop to near 25 percent as winds veer northerly
near 5 to 10 mph.

.TODAY...

Sky/weather.........Mostly cloudy.
Chance of pcpn......0 percent.
LAL.................1.
Temperature.........39 at ignition...Max 51.
RH..................76 percent at ignition...Min 44 percent.
Dewpoint............33 decreasing to 30 late at night.
Wind (20 ft)........Winds northwest at 8 mph at
                    ignition...otherwise Northwest winds 9 to 10
                    mph. Gusts up to 20 mph through this aftn.
Mixing height.......3700 ft AGL at ignition...otherwise 3600-4800
                    ft AGL.
Transport winds.....Northwest to North 15 to 22 mph.
Vent Rate...........Excellent /70600 knot-ft/ at ignition.
                    Max...excellent /76300 knot-ft/.
LVORI...............2.
ADI.................28 increasing to 55 until late afternoon, then
                    decreasing to 46 early in the afternoon.
Haines Index........2 or very low potential for large plume
                    dominated fire growth at ignition...max 2.

TIME (EDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........65  59  61  63  66  74  82  90  79  68  57
Weather cov.....
Weather type....
Tstm cov........
Cch of pcpn (%).0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1
Temp............39  38  38  39  41  43  45  47  49  51  51
Dewpoint........32  30  29  28  28  29  29  30  31  31  32
RH..............76  73  70  64  59  57  53  51  50  46  48
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW  N   N
20 FT wind spd..6   7   7   7   6   7   7   7   6   7   6
20 FT wind gust.15  20  20  20  15  15  15  15  15  15  15
Ridge wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW  N   N
Ridge wind spd..10  15  15  15  10  15  15  15  10  15  10
Mix hgt (kft)...3.7 3.8 4.0 4.5 4.7 4.7 4.7 4.8 4.7 4.7 4.7
Transp wind dir.NW  NW  NW  NW  NW  NW  NW  NW  NW  N   N
Transp wind spd.22  22  21  20  18  17  17  16  16  15  15
LVORI...........3   3   1   1   1   1   1   1   1   1   1
ADI.............58  59  58  57  55  52  50  48  47  45  44
Haines index....2   2   2   2   2   2   2   2   2   2   2
VRate kt-ft/100071  72  73  76  75  71  69  67  64  62  61

.TONIGHT...

Sky/weather.........Mostly cloudy then becoming mostly clear. Areas
                    of frost late. Widespread frost late at night.
Chance of pcpn......0 percent.
LAL.................1.
Temperature.........Min 32.
RH..................Max 92 percent.
Dewpoint............31.
Wind (20 ft)........North winds 6 to 9 mph early in the evening
                    becoming light.
Mixing height.......3000-4600 ft AGL decreasing to 400-1300 ft AGL
                    late.
Transport winds.....North 6 to 15 mph decreasing to 3 to 5 mph late
                    at night.
Vent Rate...........Poor to good (10200-57500 knot-ft) decreasing
                    to poor to poor (1200-2500 knot-ft) late.
LVORI...............4.
ADI.................43 decreasing to 6.
Haines Index........2 to 4 or very low potential for large plume
                    dominated fire growth to or low potential for
                    large plume dominated fire growth.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........51     32     21     11     3      1
Weather cov.....                            AREAS  WIDSPD
Weather type....NONE   NONE   NONE   NONE   FROST  FROST
Tstm cov........
Cch of pcpn (%).0      0      0      0      0      0
LAL.............1      1      1      1      1      1
Temp............50     47     43     39     37     34
Dewpoint........31     31     32     32     32     30
RH..............48     53     65     76     82     85
20 ft wind......N 6    N 4    NW 2   NW 1   NW 0   N 1
20 ft wind gust.15     10     10     5      5      5
Ridgetop wind...N 10   N 5    NW 0   NW 0   NW 0   N 0
Mix hgt (ft)....4600   4300   3900   3000   500    400
Transport wind..N 15   N 14   N 15   N 13   N 6    N 3
LVORI...........1      2      3      4      5      5
ADI.............43     6      7      6      3      2
Haines index....2      2      3      3      3      4
VRate kt-ft/100058     52     52     32     3      1

.FRIDAY...

Sky/weather.........Sunny. Widespread frost late at night, then
                    areas of frost late at night.
Chance of pcpn......0 percent.
LAL.................1.
Temperature.........Max 61.
RH..................Min 26 percent.
Dewpoint............29.
Wind (20 ft)........Light winds becoming north around 6 mph in the
                    afternoon.
Mixing height.......500-2400 ft AGL increasing to 2800-4400 ft AGL
                    late in the morning.
Transport winds.....Northeast 5 to 10 mph.
Vent Rate...........Poor to good (1900-37500 knot-ft).
LVORI...............4.
ADI.................5 increasing to 38.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (EDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........1         1         0         1
Weather cov.....WIDSPD
Weather type....FROST     NONE      NONE      NONE
Tstm cov........
Cch of pcpn (%).0         0         0         0
LAL.............1         1         1         1
Temp............32        38        52        60
Dewpoint........30        30        30        28
RH..............92        73        43        29
20 FT wind......N 1G5     NE 2G5    NE 4G5    N 4G5
Ridgetop wind...N 0       NE 5      NE 5      N 5
Mix hgt (ft)....500       1400      3200      4200
Transport wind..N 5       NE 7      NE 8      NE 10
LVORI...........7         3         2         1
ADI.............2         12        27        39
Haines index....4         4         4         4
VRate kt-ft/10002         8         22        38

$$
Forecaster...GUSEMAN
Requested by...Todd Ross
Type of request...PRESCRIBED
.TAG 1806976.0/JKL
.EMAIL toddross02@fs.fed.us



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