Spot Forecast Issued by NWS St. Louis, MO
000
FNUS73 KLSX 231855
FWSLSX
Spot Forecast for Adams Fire...USDA - USFS
National Weather Service Saint Louis MO
155 PM CDT Tue Apr 23 2024
Forecast is based on forecast start time of 1400 CDT on April 23.
If conditions become unrepresentative, contact the
National Weather Service.
.DISCUSSION...
A band of showers with scattered thunderstorms will move into the
area from the northwest between 3-5 pm. Less than one-
quarter of an inch is likely with this band, but the relative
humidity will increase. Winds will be erratic around thunderstorms.
A cold front will move through the fire area causing winds to shift
from the northwest around 5 pm. There will be chance of showers
(20-40%) through early this evening and then dry weather is expected
through Wednesday. Winds will generally be light tonight and
on Wednesday and mixing levels will climb to almost 6000ft AGL on
Wednesday.
.REST OF TODAY...
Sky/weather.........Cloudy (85-95 percent). Showers likely and
slight chance of thunderstorms.
Chance of pcpn......60 percent.
LAL.................No Tstms until 1600, then 9-15 strikes.
Temperature.........73 at forecast start...Max 73.
RH..................41 percent at forecast start...Min 40 percent.
Wind (20 ft)........Winds southwest at 10 mph at forecast
start...otherwise Southwest winds 8 to 10 mph
with gusts to around 19 mph shifting to the
west around 7 mph late in the afternoon. Gusty
and erratic winds expected near thunderstorms
late in the afternoon.
Eye level winds.....Winds will be around 2 mph using a adjustment
factor of 0.2.
Haines Index........4 or low potential for large plume dominated
fire growth at forecast start...max 4.
Mixing height.......5300 ft AGL at forecast start...otherwise max
5300 ft AGL.
Transport winds.....West 20 to 23 mph shifting to the northwest
around 15 mph late in the afternoon.
Smoke dispersal.....Excellent /16750 m/s-m/ at forecast start.
Max...excellent /16750 m/s-m/.
TIME (CDT) 2 PM 4 PM 6 PM 8 PM 10 PM MIDNGT
Sky (%).........91 91 92 84 62 36
Weather cov.....S CHC CHANCE LIKELY CHANCE
Weather type....RNSHWR RNSHWR RNSHWR RNSHWR NONE NONE
Tstm cov........ S CHC S CHC S CHC
CWR.............20 50 60 30 10 0
LAL.............2 3 3 3 1 1
Temp............73 71 66 60 57 53
RH..............41 49 61 72 80 89
20 ft wind......SW 10 W 8 W 6 NW 4 NW 3 NW 3
20 ft wind gust.18 18 14 8 5 4
Eye level wind..SW 5 W 4 W 3 NW 2 NW 1 NW 1
Eye lvl wnd gst.8 8 6 4 2 2
Mix hgt (kft)...5.3 4.1 1.7 0.9 0.5 0.4
Transport wind..SW 23 W 20 N 14 NW 8 NW 7 NW 6
Haines index....4 4 2 2 4 4
Vrate kt-ft/1K..107 69 20 6 3 2
Ventrate Cat....VYGD GOOD POOR POOR POOR POOR
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80 percent) then becoming
partly cloudy (25-35 percent). Rain showers
likely early in the evening. Slight chance of
thunderstorms early in the evening. Chance of
rain showers early in the evening.
Chance of pcpn......60 percent.
LAL.................9-15 strikes until 2100, then No Tstms.
Temperature.........Min 45.
RH..................Max 96 percent.
Wind (20 ft)........Northwest winds 5 to 6 mph early in the evening
becoming light. Gusty and erratic winds
expected near thunderstorms early in the
evening.
Eye level winds.....Light winds.
Haines Index........2 to 4 or very low to low potential for large
plume dominated fire growth.
Mixing height.......Min 400 ft AGL.
Transport winds.....Northwest 6 to 14 mph.
Smoke dispersal.....Poor (350 m/s-m).
.WEDNESDAY...
Sky/weather.........Sunny (10-20 percent).
Chance of pcpn......0 percent.
LAL.................No Tstms.
Temperature.........Max 73.
RH..................Min 28 percent.
Wind (20 ft)........Light winds becoming north around 5 mph late in
the morning, then becoming light late in the
afternoon.
Eye level winds.....Light winds.
Haines Index........4 to 5 or low to moderate potential for large
plume dominated fire growth.
Mixing height.......Max 5900 ft AGL.
Transport winds.....North 6 to 12 mph.
Smoke dispersal.....Poor (360 m/s-m) early in the morning
increasing to fair max (6320 m/s-m) in the
afternoon.
$$
Forecaster...Britt
Requested by...Patric Marlow
Type of request...WILDFIRE
.TAG 2412022.0/LSX
.DELDT 04/23/24
.FormatterVersion 2.0.0