Suppression Forecast
Issued by NWS Sioux Falls, SD

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FNUS73 KFSD 261351
FWSFSD

Spot Forecast for LITTLE SWAN LAKE...IOWA DNR
National Weather Service Sioux Falls SD
851 AM CDT Thu Apr 26 2018

If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Most noteworthy today is a strong frontal boundary moving across
the burn area mid morning, with winds shifting from southwest to very
strong and gusty north/northwest, most likely between 10 and 11 am.
Winds will remain strong and gusty throughout the afternoon, with
humidity also dropping to around 30 percent late day.  A very high
rangeland fire danger is in place today. It should also be noted that
there is potential that humidity readings could fall even a bit lower
mid to late afternoon than currently forecast, and confidence in the
strength of winds remains high.

.REST OF TODAY...

Max temperature.....57-62.
Min humidity........33 percent.

TIME (CDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC  CDY MC  MC  MC  MC  PC  MCR MCR
Sky (%).........73  88  81  75  69  51  34  17  11
Weather cov.....    CHC CHC
Weather type....    RW  RW
Tstm cov........
Chc of pcpn (%).10  10  10  2   0   0   0   0   0
Temp............48  52  54  56  57  58  59  60  60
Dewpoint........37  38  39  40  40  39  34  32  30
RH..............65  59  56  55  53  49  39  35  31
20 FT wind dir..W   W   WNW NW  NNW NNW NNW NNW NNW
20 FT wind spd..10  14  16  17  19  20  21  21  21
20 FT wind gust.13  18  23  25  29  27  29  30  29
Mix hgt (kft)...1.0 1.4 1.9 2.5 3.0 3.8 4.7 5.5 5.7
Transp wind dir.W   W   WNW NNW NNW N   N   N   NNW
Transp wind spd.17  21  22  23  24  26  28  29  28
Haines index....4   4   4   3   3   3   3   3   3
Smoke dispersal.FR  FR  GD  GD  GD  EX  EX  EX  EX

.TONIGHT...

Min temperature.....33-38.
Max humidity........75 percent.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky cover.......CLEAR  CLEAR  CLEAR  CLEAR  CLEAR  CLEAR
Sky (%).........5      1      0      1      2      2
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      0      0
Temp............58     52     45     40     38     37
Dewpoint........28     30     31     31     29     29
RH..............39     44     58     70     70     72
20 ft wind......NNW 20 NNW 13 NW 7   W 6    W 7    WSW 8
20 ft wind gust.28     18
Mix hgt (ft)....5600   5500   300    300    300    300
Transport wind..NNW 25 NNW 17 NW 8   W 6    W 7    WSW 9
Haines index....4      4      4      4      4      5
Smoke dispersal.EXCEL  EXCEL  POOR   POOR   POOR   POOR

.FRIDAY...

Max temperature.....58-63.
Min humidity........33 percent.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky cover.......CLEAR  MCLEAR MCLEAR MCLEAR MCLEAR CLEAR
Sky (%).........5      16     18     10     7      5
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      0      0
Temp............36     42     54     60     61     61
Dewpoint........30     33     37     36     34     32
RH..............79     70     52     41     36     33
20 ft wind......WSW 12 W 14   WNW 17 NW 21  NW 23  NNW 23
20 ft wind gust.15     21     25     29     31     31
Mix hgt (ft)....300    300    600    4000   5900   6100
Transport wind..WSW 13 W 20   WNW 29 NW 35  NW 36  NNW 35
Haines index....5      5      5      4      4      4
Smoke dispersal.POOR   POOR   POOR   EXCEL  EXCEL  EXCEL

$$
Forecaster...Chapman
Requested by...RORY MARTINSON
Type of request...PRESCRIBED
.TAG 1807938.0/FSD



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