Text Products for FWS Issued by LBF

Spot Forecast
Issued by NWS North Platte, NE
Versions: 1 2 3 4 5 6 7
000
FNUS73 KLBF 202140
FWSLBF

Spot Forecast for Heron RX...USFS
National Weather Service North Platte NE
440 PM CDT Sat Apr 20 2024

Forecast is based on ignition time of 0900 MDT on April 21.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact the NWS North Platte office at 308-532-0921 (or
at 1-800-603-3562) if you have any questions or concerns with this forecast.

.DISCUSSION...
Conditions look fairly good for the proposed burn Sunday morning with no
precipitation expected and full sun helping to lift mixing heights above
5000ft AGL Sunday afternoon with a Minimum relative humidity around
25 percent. However one concern will be southwesterly winds around 10mph
at ignition becoming gusty through Sunday afternoon. Gusts of 20 to 25mph
can be expected at the burn site through mid to late afternoon. Winds will
subside a bit Sunday evening with loss of daytime heating, but a robust low
level jet will become established by early Sunday night and lead to a
resurgence of gusts through the overnight hours. Something to keep in mind
if the burn runs long. Fortunately moisture recover looks adequate Sunday
night with maximum humidity values around 75 percent through late Sunday night.


.SUNDAY...

Sky/weather.........Sunny.
Max temperature.....Around 60.
Min humidity........26 percent.
Wind (20 ft)........Southwest winds 7 to 14 mph.
Eye level winds.....Southwest winds up to 8 mph.
LAL.................1.
Mixing height.......5500 ft AGL.
Transport winds.....Southwest 8 to 17 mph shifting to the south
                    around 18 mph late in the afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (MDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM
Sky (%).........3   3   3   3   3   4   4   7
Weather cov.....
Weather type....
Tstm cov........
LAL.............1   1   1   1   1   1   1   1
Temp............40  45  49  53  55  57  59  60
RH..............59  49  40  33  31  30  28  27
20 FT wind dir..SW  SW  SW  SW  SW  SW  S   S
20 FT wind spd..7   8   9   10  12  13  14  14
20 FT wind gust.9   12  12  15  17  18  20  22
Eye lvl wnd dir.SW  SW  SW  SW  SW  SW  S   S
Eye lvl wnd spd.4   5   5   6   7   8   8   8
Eye lvl wnd gst.5   7   8   9   10  11  12  12
Mix hgt (kft)...1.9 3.5 4.3 4.8 5.1 5.4 5.5 5.5
Transp wind dir.SW  SW  SW  SW  SW  S   S   S
Transp wind spd.8   8   12  12  13  15  17  18
Haines index....4   4   4   5   5   5   5   5

.SUNDAY NIGHT...

Sky/weather.........Partly cloudy then becoming mostly cloudy.
Min temperature.....Around 43.
Max humidity........72 percent.
Wind (20 ft)........South winds 15 to 22 mph.
Eye level winds.....South winds 9 to 13 mph.
LAL.................1.
Mixing height.......700 ft AGL.
Transport winds.....South 17 to 25 mph.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (MDT)      5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM
Sky (%).........9   11  23  35  47  49  51  53  53  54  55  61
Weather cov.....
Weather type....
Tstm cov........
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............59  59  55  50  48  48  47  46  45  44  44  43
RH..............29  30  37  48  54  56  58  60  62  68  68  70
20 FT wind dir..S   S   S   S   S   S   S   S   S   S   S   SW
20 FT wind spd..15  15  15  15  15  17  18  21  21  22  21  20
20 FT wind gust.23  23  21  18  20  24  26  29  30  30  30  28
Eye lvl wnd dir.S   S   S   S   S   S   S   S   S   S   S   SW
Eye lvl wnd spd.9   9   9   9   9   10  11  13  13  13  13  12
Eye lvl wnd gst.13  13  13  13  13  14  16  17  18  18  18  17
Mix hgt (kft)...5.2 4.5 1.4 1.1 0.7 0.7 0.7 0.8 0.8 0.8 0.8 0.8
Transp wind dir.SW  SW  S   S   S   S   S   S   S   SW  SW  SW
Transp wind spd.20  21  17  17  18  21  22  24  25  25  24  23
Haines index....5   5   5   5   5   5   5   4   4   4   4   4

.MONDAY...

Sky/weather.........Partly sunny then becoming sunny. Slight chance
                    of showers in the morning.
Max temperature.....Around 63.
Min humidity........27 percent.
Wind (20 ft)........West winds 17 to 18 mph shifting to the
                    northwest 15 to 24 mph with gusts to around 37
                    mph in the late morning and afternoon.
Eye level winds.....Southwest winds around 11 mph shifting to the
                    northwest 9 to 14 mph with gusts to around 22
                    mph in the late morning and afternoon.
LAL.................1.
Mixing height.......5500 ft AGL.
Transport winds.....West 20 to 24 mph shifting to the northwest 16
                    to 25 mph in the late morning and afternoon.
Haines Index........4 low.

TIME (MDT)      5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM
Sky (%).........67  73  68  63  62  58  55  51  39  28  16  21
Weather cov.....    SCH SCH SCH SCH SCH SCH
Weather type....    RW  RW  RW  RW  RW  RW
Tstm cov........
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............43  44  45  48  51  54  57  59  61  62  63  63
RH..............73  70  68  58  50  43  38  34  31  30  27  27
20 FT wind dir..SW  W   W   NW  NW  NW  N   N   N   NW  NW  NW
20 FT wind spd..18  17  18  20  23  24  23  21  20  17  16  15
20 FT wind gust.26  25  25  28  35  37  35  31  29  26  24  22
Eye lvl wnd dir.SW  W   W   NW  NW  NW  N   N   N   NW  NW  NW
Eye lvl wnd spd.11  10  11  12  14  14  14  13  12  10  10  9
Eye lvl wnd gst.16  15  15  17  21  22  21  19  17  16  14  13
Mix hgt (kft)...0.8 0.7 1.3 1.9 2.6 3.0 3.5 3.9 4.4 5.0 5.5 5.3
Transp wind dir.W   W   W   NW  NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.22  20  22  24  25  25  24  23  22  21  20  16
Haines index....4   4   4   4   4   4   4   4   4   4   4   4

$$
Forecaster...Sporer
Requested by...Nate Hanson
Type of request...PRESCRIBED
.TAG 2411530.0/LBF
.DELDT 04/20/24
.FormatterVersion 2.0.0
.EMAIL nathan.hanson@usda.gov
National Weather Service Weather Forecast Office
