396
FNUS75 KBYZ 271037
FWSBYZ

Spot Forecast for Pompeys Pillar Rx...BLM
National Weather Service Billings MT
437 AM MDT Thu Mar 27 2025

Forecast is based on ignition time of 0700 MDT on March 27.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

.DISCUSSION...

Clear skies and light winds are in store for the site this
morning. Very warm temperatures are forecast for the site, with a
max temperature between 80-84F. Winds will begin increasing this
afternoon from the west ahead of a cold front. With this front,
winds will shift to the west and bring gusts in the low 20s mph.
The chance for precipitation will increase with this frontal
passage, though the chance for a wetting rain will remain low.
Expect minimum relative humidity values in the upper teens to
around 20% today, recovering to 65-70% Thursday night. Mostly dry
and clear conditions will prevail through Friday morning, before
the chance for precipitation increases with the arrival of another
system Friday evening.

.REST OF TODAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
Max temperature.....80-84.
Min humidity........17-21 percent.
Wind (20 ft)........
 Slope/valley.......Light southwest winds around 5 mph, increasing
to 11 mph from the west in the early afternoon.
Mixing height.......Increasing to 9300 ft AGL in the afternoon.
Transport winds.....South around 15 mph in the morning, increasing
to 20 mph from the west in the afternoon.

TIME (MDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........12  13  9   7   13  12  13  22  32  47  57
Weather cov.....
Weather type....
Tstm cov........
Temp............41  43  49  56  62  69  75  80  81  82  80
RH..............71  67  60  49  41  34  27  21  17  19  22
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  W   W   W   W
20 FT wind spd..5   5   4   5   5   6   7   9   10  11  10
20 FT wind gust.6   6   6   6   6   7   10  13  14  16  14

.TONIGHT...

Sky/weather.........Mostly cloudy. Slight chance of rain.
CWR.................10 percent.
Min temperature.....44-48.
Max humidity........66-70 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5 to 10 mph.
Mixing height.......Decreasing to 700 ft AGL overnight.
Transport winds.....West 14 to 20 mph.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........64  69  56  71  78  77  76  72  71  68  70  56
Weather cov.....SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH
Weather type....RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN
Tstm cov........
Temp............79  73  67  62  60  58  55  53  52  51  49  48
RH..............25  31  39  48  52  56  61  64  65  66  68  70
20 FT wind dir..W   W   NW  NW  NW  W   SW  SW  SW  SW  W   W
20 FT wind spd..10  9   9   7   6   6   5   6   6   6   6   7
20 FT wind gust.14  13  13  10  10  7   6   7   7   7   10  10

.FRIDAY...

Sky/weather.........Mostly sunny. Slight chance of rain in the
                    afternoon.
CWR.................0 percent.
Max temperature.....60-64.
Min humidity........36-40 percent.
Wind (20 ft)........
 Slope/valley.......Northwest winds 7 to 10 mph shifting to the
                    north late in the afternoon.
Mixing height.......Increasing to 6300 ft AGL in the afternoon.
Transport winds.....West around 14 mph shifting to the northwest
                    around 16 mph in the afternoon.

TIME (MDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........53        32        48        59
Weather cov.....                    S CHC     S CHC
Weather type....NONE      NONE      RAIN      RAIN
Tstm cov........
Temp............46        48        57        62
RH..............68        67        48        36
20 FT wind......W 7G10    NW 7G10   NW 9G13   N 10G14

$$
Forecaster...Matos/Chambers
Requested by...Robert Griffin
Type of request...PRESCRIBED
.TAG 2507761.2/BYZ
.DELDT 03/27/25
.FormatterVersion 2.0.0
.EMAIL rmgriffin@blm.gov,dday@blm.gov,iwald@blm.gov