456
FNUS74 KJAN 221012
FWSJAN

Spot Forecast for Comp 81 Prairie Burn...USFS
National Weather Service Jackson MS
412 AM CST Fri Nov 22 2024

Forecast is based on ignition time of 0800 CST on November 22.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...fog is not expected to be a significant concern given
the drier air moving in and boundary layer mixing.

Sky/weather.........Sunny (0-10 percent).
Temperature.........40 at ignition...Max 58.
RH..................70 percent at ignition...Min 47 percent.
Wind (20 ft)........Winds north at 6 mph at ignition...otherwise
                    Northwest winds around 5 mph early in the
                    morning becoming light.
Mixing height.......1200 ft AGL at ignition...otherwise 2700 ft
                    AGL.
Transport winds.....North 7 to 15 mph.
Mixing height (m)...1200 meters AGL at ignition...otherwise 152-823
                    meters AGL.
Transport winds m/s.North 3 to 7 meters/second.

TIME (CST)      8 AM   10 AM  Noon   2 PM   4 PM
Sky cover.......Clear  Clear  Clear  Clear  Clear
Weather cov.....
Weather type....None   None   None   None   None
Tstm cov........
Temp............40     49     54     57     55
RH..............70     54     50     47     51
20 ft wind dir..N      N      NW     NW     NW
20 ft wind spd..5      5      5      5      5
20 ft wind gust.17     15     14     14     13
Mix hgt (ft)....1200   1900   2500   2700   2400
Mix hgt (m).....370    580    760    820    730
Transport wind..N 14   N 13   N 12   N 12   N 10
Tran wind (m/s).N 6    N 6    N 5    N 5    N 4

.TONIGHT...

Sky/weather.........Clear (0-10 percent). Patchy frost overnight.
                    Areas of fog after 3 am. Widespread frost early
                    in the morning.
Temperature.........Min 30.
RH..................Max 100 percent.
Wind (20 ft)........Light winds.
Mixing height.......400 ft AGL.
Transport winds.....North 3 to 9 mph.
Mixing height (m)...122 meters AGL.
Transport winds m/s.North 1 to 4 meters/second.

TIME (CST)      6 PM   8 PM   10 PM  Midngt 2 AM   4 AM
Sky cover.......Clear  Clear  Clear  Clear  MClear MClear
Weather cov.....                            Patchy Areas
Weather type....None   None   None   None   Frost  Fog
Tstm cov........
Temp............46     41     40     38     35     33
RH..............73     89     89     92     100    100
20 ft wind dir..NW     NW     NW     N      N      N
20 ft wind spd..2      2      2      1      0      0
20 ft wind gust.12     10     8      6      5      3
Mix hgt (ft)....400    400    400    400    400    400
Mix hgt (m).....120    120    120    120    120    120
Transport wind..N 9    N 9    N 8    N 7    N 7    N 5
Tran wind (m/s).N 4    N 4    N 4    N 3    N 3    N 2

.SATURDAY...

Sky/weather.........Sunny (0-10 percent). Widespread frost and
                    areas of fog early in the morning.
Temperature.........Max 64.
RH..................Min 46 percent.
Wind (20 ft)........Light winds.
Mixing height.......2600 ft AGL.
Transport winds.....Northeast 3 to 5 mph shifting to the east
                    around 3 mph late in the morning, then shifting
                    to the west 2 to 5 mph late in the morning
                    shifting to the south around 3 mph late in the
                    afternoon.
Mixing height (m)...91-792 meters AGL.
Transport winds m/s.Northeast 1 to 2 meters/second shifting to the
                    east around 1 meters/second late in the
                    morning, then shifting to the west 1 to 2
                    meters/second late in the morning shifting to
                    the south around 1 meters/second late in the
                    afternoon.

TIME (CST)      6 AM      9 AM      Noon      3 PM
Sky cover.......Clear     Clear     Clear     Clear
Weather cov.....Widspd
Weather type....Frost     None      None      None
Tstm cov........
Temp............31        48        59        63
RH..............100       74        51        46
20 ft wind dir..N         N         W         W
20 ft wind spd..0         0         2         1
20 ft wind gust.3         2         3         3
Mix hgt (ft)....400       1000      2300      2400
Mix hgt (m).....120       300       700       730
Transport wind..NE 5      E 3       NW 3      W 5
Tran wind (m/s).NE 2      E 1       NW 1      W 2

$$
Forecaster...Carpenter
Requested by...USFS
Type of request...PRESCRIBED
.TAG 2427175.0/JAN
.DELDT 11/22/24
.FormatterVersion 2.0.0
.EMAIL john.crews@usda.gov