National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FNUS73 KDMX 121430
FWSDMX

Spot Forecast for Pine Ridge...Hardin County Conservation
National Weather Service Des Moines IA
930 AM CDT Fri Apr 12 2024

Forecast is based on ignition time of 1000 CDT on April 12.
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...

Breezy winds out of the northwest are expected today with gusts as
high as 30 mph at times. Winds are expected to gradually weaken
into the mid to late afternoon.  Minimum relative humidity (RH)
values may dip to 25 to 30 percent by late afternoon, but these
lowest RH values will be offset in time from the highest wind
gusts.

.REST OF TODAY...

Sky/weather.........Sunny (0-5 percent).
Temperature.........51 at ignition...Max 63.
RH..................52 percent at ignition...Min 26 percent.
Wind (20 ft)........Winds northwest at 20 mph at
                    ignition...otherwise Northwest winds 18 to 22
                    mph.
Mixing height.......2900 ft AGL at ignition...otherwise 6900 ft
                    AGL.
Transport winds.....Northwest 26 to 32 mph.
Smoke dispersal.....Excellent /73300 knot-ft/ at ignition.
                    Max...excellent /163100 knot-ft/ increasing to
                    excellent (149500 knot-ft) late in the
                    afternoon.
GFDI................8.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 4.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........2   1   1   1   1   1   1   1
Weather cov.....
Weather type....
Tstm cov........
Temp............51  55  57  59  61  61  62  63
RH..............52  45  40  34  31  29  27  26
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..20  21  22  22  22  21  20  18
20 FT wind gust.26  29  30  30  29  28  25  23
Mix hgt (kft)...2.9 3.9 5.2 6.0 6.5 6.7 6.9 6.5
Transp wind dir.NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.29  30  32  31  31  30  29  26
GFDI............5   7   9   10  11  10  10  9
Haines index....4   4   4   4   4   4   4   4
SDspl kt-ft/100073  102 145 163 175 175 171 150

.TONIGHT...

Sky/weather.........Clear (0-5 percent).
Temperature.........Min 37.
RH..................Max 73 percent.
Wind (20 ft)........Northwest winds 6 to 15 mph decreasing to
                    around 5 mph late in the evening, then becoming
                    light late in the evening becoming south around
                    5 mph after 3 am.
Mixing height.......300 ft AGL.
Transport winds.....Northwest 16 to 25 mph decreasing to 6 to 12
                    mph early in the evening, then shifting to the
                    south 5 to 8 mph overnight.
Smoke dispersal.....Excellent (137200 knot-ft) decreasing to fair
                    (23000 knot-ft) early in the evening decreasing
                    to poor (1300 knot-ft) late in the night.
GFDI................3.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........1      1      2      1      2      3
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............62     55     48     43     40     38
RH..............27     37     49     60     67     73
20 ft wind......NW 15  NW 7   NW 5   W 3    SW 3   S 5
20 ft wind gust.18     13     7      6      5      6
Mix hgt (ft)....6200   800    400    300    300    300
Transport wind..NW 25  NW 12  NW 8   NW 6   SW 5   S 6
GFDI............6      2      1      0      0      0
Haines index....4      4      4      4      5      5
SDspl kt-ft/1000137    8      3      2      1      2

$$
Forecaster...Cogil
Requested by...Josh Gaffey
Type of request...PRESCRIBED
.TAG 2410513.0/DMX
.DELDT 04/12/24
.FormatterVersion 2.0.0
.EMAIL jgaffey@hardincountyia.gov