Suppression Forecast
Issued by NWS Des Moines, IA

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000
FNUS73 KDMX 191419
FWSDMX

Spot Forecast for Colfax West...Iowa DNR
National Weather Service Des Moines IA
919 AM CDT Thu Apr 19 2018

Forecast is based on ignition time of 1100 CDT on April 19.
If conditions become unrepresentative...contact the National Weather
Service.

An initial observation at ignition and a mid burn observation are required.

Please relay them to the National Weather Service for each prescribed burn.

.DISCUSSION...

Light north winds will persist through the day with sunny skies.
Fuels will dry gradually with the light north winds although the
sun will help. Relative humidity values will drop to around 40 to
50 percent by afternoon.

.REST OF TODAY...

Sky/weather.........Sunny (5-15 percent).
Temperature.........41 at ignition...Max 50.
RH..................65 percent at ignition...Min 44 percent.
Wind (20 ft)........Winds north at 7 mph at ignition...otherwise
                    North winds 7 to 8 mph.
Mixing height.......2600 ft AGL at ignition...otherwise 2600-3600
                    ft AGL.
Transport winds.....Northeast 8 to 10 mph.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 5.

TIME (CDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........8   12  14  13  5   2   2
Weather cov.....
Weather type....
Tstm cov........
Temp............41  43  46  48  49  50  50
RH..............65  59  54  49  46  44  44
20 FT wind dir..N   N   N   N   N   N   N
20 FT wind spd..7   8   8   8   8   8   8
20 FT wind gust.
Mix hgt (kft)...2.6 3.1 3.6 3.6 3.6 3.6 3.2
Transp wind dir.N   N   N   N   N   N   NE
Transp wind spd.9   10  10  10  9   8   8
Haines index....4   4   5   5   5   5   5

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent). Patchy fog after
                    midnight.
Temperature.........Min 27.
RH..................Max 88 percent.
Wind (20 ft)........Northeast winds 5 to 7 mph in the evening
                    becoming light.
Mixing height.......1000-2800 ft AGL decreasing to 300 ft AGL in
                    the late evening and overnight.
Transport winds.....Northeast 2 to 8 mph.
Haines Index........4 to 5 or low potential for large plume
                    dominated fire growth or moderate potential for
                    large plume dominated fire growth.

TIME (CDT)      6 PM      9 PM      MIDNGT    3 AM
Sky (%).........1         11        17        27
Weather cov.....                              PATCHY
Weather type....NONE      NONE      NONE      FOG
Tstm cov........
Temp............49        39        34        30
RH..............46        67        82        85
20 FT wind......NE 7      NE 5      NE 5      NE 2
Mix hgt (ft)....2800      1000      300       300
Transport wind..NE 8      NE 7      NE 3      NE 2
Haines index....5         4         4         4

.FRIDAY...

Sky/weather.........Sunny (20-30 percent). Patchy fog early in the
                    morning.
Temperature.........Max 56.
RH..................Min 40 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 8 mph in
                    the late morning and afternoon.
Mixing height.......300-1500 ft AGL increasing to 4600-5000 ft AGL.
Transport winds.....Southeast 2 to 9 mph.
Haines Index........4 to 5 or low potential for large plume
                    dominated fire growth or moderate potential for
                    large plume dominated fire growth.

TIME (CDT)      6 AM         10 AM        2 PM
Sky (%).........26           22           17
Weather cov.....PATCHY
Weather type....FOG          NONE         NONE
Tstm cov........
Temp............28           43           54
RH..............88           65           43
20 FT wind......E 2          SE 6         SE 7
Mix hgt (ft)....300          1500         4600
Transport wind..NE 2         SE 7         SE 8
Haines index....4            5            5

$$
Forecaster...Cogil
Requested by...Casey Trine
Type of request...PRESCRIBED
.TAG 1807066.0/DMX
.EMAIL casey.trine@dnr.iowa.gov



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