Spot Forecast
Issued by NWS Cheyenne, WY
Issued by NWS Cheyenne, WY
662
FNUS75 KCYS 191925
FWSCYS
Spot Forecast for Schiff Fire...Alliance Fire Department
National Weather Service Cheyenne WY
125 PM MDT Wed Jun 19 2024
If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227
.DISCUSSION...
Southeast winds will continue through the remainder of the afternoon.
Gusts from these southeast winds up to 28-30 mph at times. Look for
chance for showers and storms to increase through the late afternoon.
Peak time frame for storms will be 2100 to 0300...but could begin as
early as 1500. Low clouds and fog expected overnight as humidity
continues to increase...so expect excellent overnight humidity
recoveries. Fog and low clouds may persist through Thursday morning
before breaking up and showers and storms redevelop Thursday afternoon.
.REST OF TODAY...
Sky/weather.........Mostly cloudy (65-75 percent). Slight chance of
showers late in the afternoon.
CWR.................4 percent.
LAL.................1.
Max temperature.....Around 67.
Min humidity........43 percent.
Wind (20 ft)........Southeast winds 20 to 22 mph with gusts to 30 mph.
Mixing height.......4500 ft AGL.
Transport winds.....Southeast 25 to 28 mph.
Smoke dispersal.....Good (92100 knot-ft) early in the morning
increasing to very good (103500 knot-ft) in the
afternoon.
Haines Index........2 or very low potential for large plume
dominated fire growth.
TIME (MDT) 2PM 3PM 4PM 5PM
Sky (%).........63 70 74 78
Weather cov..... SCH SCH SCH
Weather type.... RW RW RW
Tstm cov........
CWR.............0 0 0 0
LAL.............1 1 1 1
Temp............66 66 66 64
RH..............47 47 48 54
20 FT wind dir..SE SE SE SE
20 FT wind spd..20 20 20 18
20 FT wind gust.30 31 31 30
Mix hgt (kft)...4.5 4.5 4.2 3.9
Transp wind dir.SE SE SE SE
Transp wind spd.25 26 26 28
Haines index....2 2 2 2
SDspl kt-ft/1000100 104 99 92
.TONIGHT...
Sky/weather.........Mostly cloudy (80-90 percent). Chance of
showers and thunderstorms through the night.
Patchy fog overnight. Areas of fog after 3 am.
CWR.................26 percent decreasing to 8 percent overnight.
LAL.................2 until 1900, then 3 until 0400, then 1.
Min temperature.....Around 51.
Max humidity........100 percent.
Wind (20 ft)........Southeast winds 18 to 22 mph with gusts to
30 mph till 2000. Then decreasing to 14 to
16 mph with gusts to 23 mph through 0200. Then
southeast to 10 mph. Gusty and erratic winds
expected near thunderstorms.
Mixing height.......1100 ft AGL.
Transport winds.....Southeast 22 to 28 mph.
Smoke dispersal.....Good (82800 knot-ft) early in the evening
decreasing to poor (21600 knot-ft) late in the
night.
Haines Index........2 to 3 or very low potential for large plume
dominated fire growth.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........82 83 83 84 85 86 88 88 89 90 89 87
Weather cov.....SCH CHC CHC CHC CHC CHC CHC CHC CHC CHC ARS ARS
Weather type....RW RW RW RW RW RW RW RW RW RNF FOG FOG
Tstm cov........SCH CHC CHC SCH SCH SCH CHC CHC CHC CHC SCH
CWR.............30 30 30 30 30 30 10 10 10 10 10 10
LAL.............2 3 3 2 2 2 3 3 3 3 2 1
Temp............59 58 55 54 54 52 52 51 52 52 52 52
RH..............64 69 80 86 86 96 100 100 100 100 100 100
20 FT wind dir..SE SE SE SE SE SE SE SE SE SE SE SE
20 FT wind spd..22 20 17 16 15 15 15 15 14 14 13 10
20 FT wind gust.36 31 28 24 23 23 23 23 23 22 20 17
Mix hgt (kft)...3.5 3.0 2.5 2.1 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1
Transp wind dir.SE SE SE SE SE SE SE SE S S S S
Transp wind spd.28 26 24 24 24 25 26 25 25 24 23 22
Haines index....2 2 2 2 2 2 3 3 3 3 3 3
SDspl kt-ft/100083 68 53 42 38 37 36 33 30 27 24 22
.THURSDAY...
Sky/weather.........Mostly cloudy (70-80 percent). Areas of fog
early in the morning, then patchy fog early in
the morning. Chance of rain showers in the
afternoon. Chance of thunderstorms late in the
afternoon.
CWR.................2 percent increasing to 24 percent in the
afternoon.
LAL.................1 until 1500, then 3.
Max temperature.....Around 79.
Min humidity........56 percent.
Wind (20 ft)........Southeast winds 9 to 14 mph. Gusty and erratic
winds expected near thunderstorms late in the
afternoon.
Mixing height.......4200 ft AGL.
Transport winds.....South 12 to 21 mph shifting to the east around
14 mph late in the afternoon.
Smoke dispersal.....Poor (20800 knot-ft) early in the morning
increasing to fair (51900 knot-ft) in the
afternoon.
Haines Index........3 to 4 or very low to low potential for large
plume dominated fire growth.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........86 88 89 91 85 79 73 68 62 56 63 70
Weather cov.....ARS PTY PTY CHC CHC CHC CHC CHC CHC
Weather type....FOG FOG FOG RW RW RW RW RW RW
Tstm cov........ CHC CHC CHC
CWR.............0 0 0 0 0 0 20 20 20 20 20 20
LAL.............1 1 1 1 1 1 1 1 1 3 3 3
Temp............52 55 57 60 64 65 69 73 75 79 78 76
RH..............100 100 96 93 81 81 73 64 62 56 60 64
20 FT wind dir..SE SE SE SE SE SE SE SE SE SE SE E
20 FT wind spd..9 9 9 10 10 12 13 14 14 14 13 12
20 FT wind gust.15 15 15 16 17 18 21 22 22 22 21 18
Mix hgt (kft)...1.1 1.2 1.5 1.7 2.0 2.3 2.7 3.3 3.9 4.2 3.9 3.3
Transp wind dir.S S S S S S S S S SE SE E
Transp wind spd.21 21 21 18 16 12 9 10 13 14 14 14
Haines index....4 4 4 4 4 4 3 3 3 3 3 3
SDspl kt-ft/100021 23 26 28 27 24 22 29 41 52 47 40
$$
Forecaster...Claycomb
Requested by...Chief Troy Shoemaker
Type of request...WILDFIRE
.TAG 2416406.0/CYS
.DELDT 06/19/24
.FormatterVersion 2.0.0
.EMAIL alorensen@cityofalliance.net