Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
507
FNUS75 KRIW 281235
FWSRIW
Spot Forecast for Deadline Ridge RX...WY BLM
National Weather Service Riverton WY
635 AM MDT Tue May 28 2024
Forecast is based on ignition time of 0700 MDT on May 28.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
An isolated rain shower or thunderstorm is possible (10-20%) this
afternoon from 1400 to 1900. Wind will be southeast this morning and
shift southwesterly early in the afternoon. Smoke dispersal will
steadily improve this morning becoming good to very good this afternoon.
RH will drop into the 20-25% range this afternoon. Gusty erratic wind
will occur with any showers or storms that develop. It will also be
about 5 degrees warmer than yesterday, with highs in the middle 60s F.
...Thunderstorms imply strong gusty and erratic winds...
...Haines index is high level haines both day and night...
.REST OF TODAY...
Sky/weather.........Mostly sunny (15-25 percent) to partly cloudy
(30-40 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
LAL.................1.
Max temperature.....Around 63.
Min humidity........24 percent.
Wind (20 ft)........Light winds becoming southeasterly 5 to 10 mph
by 1000 through 1400, then shifting
to the southwest 7 to 12 mph.
Ridgetop wind.......South 5 to 10 mph shifting to the southwest
around 15 mph by 1400.
Mixing height.......500 ft AGL increasing to 11500 ft AGL.
Transport winds.....South 8 to 14 mph shifting to the west around
15 mph by 1400.
Smoke dispersal.....Poor (3600 knot-ft) early in the morning
increasing to good (81200 knot-ft) by 1200 increasing
to very good (149700 knot-ft) by 1500.
Haines Index........3 to 5 or very low to moderate potential for
large plume dominated fire growth.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........7 5 4 5 7 6 7 16 30 47 59
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 0 10 10 10
LAL.............1 1 1 1 1 1 1 1 1 1 1
Temp............45 48 53 56 58 60 62 62 62 62 62
RH..............50 45 42 36 32 28 26 25 24 24 24
20 FT wind dir..SW SE SE SE S S S SW SW SW SW
20 FT wind spd..3 3 4 5 6 7 7 8 7 8 8
20 FT wind gust.5 5 6 7 10 11 11 13 11 13 13
Ridge wind dir..S S SE SE SE S S S SW SW SW
Ridge wind spd..5 5 10 10 10 15 15 15 15 15 15
Mix hgt (kft)...0.5 0.5 1.6 1.6 1.6 6.8 6.8 6.8 12 12 12
Transp wind dir.S S SE SE SE SW SW SW W W W
Transp wind spd.8 8 10 10 10 14 14 14 15 15 15
Haines index....3 3 3 3 3 5 5 5 5 5 5
SDspl kt-ft/10004 4 14 14 14 81 81 81 150 150 150
.TONIGHT...
Sky/weather.........Partly cloudy (25-40 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
LAL.................1.
Min temperature.....Around 45.
Max humidity........58 percent.
Wind (20 ft)........Southwest winds 6 to 10 mph shifting to the
west 5 to 9 mph after 0300.
Ridgetop wind.......Southwest around 15 mph.
Mixing height.......6900 ft AGL decreasing to 500 ft AGL by 0000.
Transport winds.....Southwest 12 to 17 mph.
Smoke dispersal.....Good (96400 knot-ft) early in the evening
decreasing to poor (6100 knot-ft) by 0000.
Haines Index........4 to 5 or low to moderate potential for large
plume dominated fire growth.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........59 54 48 41 27 15 14 23 39 53 45 47
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).10 0 0 0 0 0 0 0 10 10 10 10
LAL.............1 1 1 1 1 1 1 1 1 1 1 1
Temp............61 58 55 52 50 50 49 49 49 48 47 48
RH..............29 35 39 45 51 52 53 54 55 54 57 56
20 FT wind dir..SW S SW SW SW W SW SW W W W W
20 FT wind spd..10 9 7 6 6 6 6 7 8 8 7 6
20 FT wind gust.16 14 11 10 10 8 10 11 13 13 11 8
Ridge wind dir..SW SW SW SW SW SW W W W W W W
Ridge wind spd..15 15 15 15 15 15 15 15 15 15 15 15
Mix hgt (kft)...6.9 6.9 6.9 3.7 3.7 3.7 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.SW SW SW W W W SW SW SW SW SW SW
Transp wind spd.16 16 16 13 13 13 14 14 14 14 14 14
Haines index....4 4 4 4 4 4 5 5 5 5 5 5
SDspl kt-ft/100096 96 96 41 41 41 6 6 6 6 6 6
.WEDNESDAY...
Sky/weather.........Partly cloudy (30-40 percent). Scattered showers
and thunderstorms in the afternoon.
CWR.................6 percent.
Chance of pcpn......40 percent.
LAL.................1 until 1200, then 3.
Max temperature.....Around 61.
Min humidity........34 percent.
Wind (20 ft)........Southwest winds 6 to 14 mph with gusts to
around 21 mph shifting to the west 16 to 18 mph
with gusts to around 28 mph by 1500. Gusty and
erratic winds expected near thunderstorms in the
afternoon.
Ridgetop wind.......Southwest 10 to 15 mph increasing to 20 to
25 mph from the west by 1500.
Mixing height.......500 ft AGL increasing to 1700 ft AGL by 1000,
then increasing to 9000 ft AGL by 1500, decreasing
to 6600 ft AGL by 1800.
Transport winds.....Southwest 12 to 16 mph increasing to west
around 35 mph by 1500.
Smoke dispersal.....Poor (5000 knot-ft) steadily increasing through the
morning to excellent (197200 knot-ft) by 1500.
Haines Index........4 to 5 or low to moderate potential for large
plume dominated fire growth.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........36 40 29 22 41 44 47 41 35 29 28 26
Weather cov..... SCT SCT SCT SCT SCT SCT
Weather type.... RW RW RW RW RW RW
Tstm cov........ SCT SCT SCT SCT SCT SCT
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
Chc of pcpn (%).10 10 10 10 10 10 30 30 30 40 40 40
LAL.............1 1 1 1 1 1 3 3 3 3 3 3
Temp............46 49 52 55 60 60 61 60 59 59 57 55
RH..............56 53 49 42 38 36 34 37 39 42 44 46
20 FT wind dir..SW SW SW SW SW SW SW W W W W W
20 FT wind spd..6 6 6 8 8 10 13 14 16 17 18 17
20 FT wind gust.10 8 10 13 13 16 19 21 24 26 28 26
Ridge wind dir..SW SW SW SW SW SW W W W W W W
Ridge wind spd..10 10 10 15 15 15 20 20 20 25 25 25
Mix hgt (kft)...0.5 0.5 0.5 1.7 1.7 1.7 9.0 9.0 9.0 6.6 6.6 6.6
Transp wind dir.SW SW SW W W W SW SW SW W W W
Transp wind spd.12 12 12 16 16 16 25 25 25 35 35 35
Haines index....5 5 5 5 5 5 4 4 4 4 4 4
SDspl kt-ft/10005 5 5 23 23 23 197 197 197 198 198 198
.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Mostly clear. Lows in the lower 30s. Highs in the lower 50s. West
winds around 12 mph.
.FRIDAY...
Mostly clear. Lows in the lower 30s. Highs in the upper 50s. West
winds around 9 mph.
.SATURDAY...
Mostly clear. Lows in the upper 30s. Highs in the mid 60s. West
winds around 9 mph.
$$
Forecaster...Rowe
Requested by...Ross Dary
Type of request...PRESCRIBED
.TAG 2415153.0/RIW
.DELDT 05/28/24
.FormatterVersion 2.0.0
.EMAIL rdary@blm.gov