884
FNUS73 KDMX 301207
FWSDMX

Spot Forecast for Union Grove North Rx...Iowa DNR
National Weather Service Des Moines IA
707 AM CDT Tue Apr 30 2024

Forecast is based on ignition time of 1000 CDT on April 30.
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...

Warmer and breezy today as south winds push afternoon temps into
the upper 70s. Peak wind gusts occur this afternoon with gusts of
up to 30 mph possible at times. Min RH dips down into the 40
percent range during peak heating.

Showers and thunderstorms are likely this evening, followed by a
switch to westerly winds tonight.

.REST OF TODAY...

Sky/weather.........Mostly sunny (20-30 percent).
Max temperature.....Around 77.
Min humidity........43 percent.
Wind (20 ft)........South winds 10 to 18 mph with gusts to around
                    29 mph increasing to 21 to 22 mph with gusts to
                    around 33 mph late in the afternoon.
Mixing height.......5100 ft AGL.
Transport winds.....South 14 to 23 mph increasing to 25 to 31 mph
                    late in the afternoon.
Smoke dispersal.....Fair (15000 knot-ft) early in the morning
                    increasing to excellent (111900 knot-ft) in the
                    afternoon increasing to excellent (117900
                    knot-ft) late in the afternoon.
GFDI................1.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........8   16  25  34  45  33  30  37
Weather cov.....
Weather type....
Tstm cov........
Temp............59  64  69  71  74  76  77  76
RH..............72  65  59  54  50  46  43  45
20 FT wind dir..SE  S   S   S   S   S   S   S
20 FT wind spd..10  12  13  15  16  18  21  22
20 FT wind gust.16  18  20  23  25  29  31  33
Mix hgt (kft)...1.3 1.9 2.7 4.2 5.0 5.1 5.0 4.4
Transp wind dir.S   S   S   S   S   S   S   S
Transp wind spd.14  16  18  21  23  25  28  31
GFDI............0   0   0   1   1   1   1   2
Haines index....4   4   4   5   5   5   5   5
SDspl kt-ft/100015  27  43  76  100 112 120 118

.TONIGHT...

Sky/weather.........Mostly cloudy (70-80 percent) then becoming
                    partly cloudy (20-30 percent) then becoming
                    mostly clear (0-10 percent). Showers and
                    thunderstorms in the evening. Slight chance of
                    showers and thunderstorms overnight.
Min temperature.....Around 48.
Max humidity........93 percent.
Wind (20 ft)........South winds 17 to 22 mph with gusts to around
                    33 mph shifting to the west 9 to 15 mph in the
                    late evening and overnight. Gusty and erratic
                    winds expected near thunderstorms in the
                    evening.
Mixing height.......400 ft AGL.
Transport winds.....South 22 to 30 mph becoming west 12 to 18 mph
                    in the late evening and overnight.
Smoke dispersal.....Good (50400 knot-ft) early in the evening
                    decreasing to poor (4300 knot-ft) late in the
                    night.
GFDI................1.
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 (%).........58     91     80     31     6      5
Weather cov.....       DEFNTE CHANCE S CHC
Weather type....NONE   RNSHWR RNSHWR RNSHWR NONE   NONE
Tstm cov........       DEFNTE CHANCE S CHC
Temp............75     69     63     58     54     50
RH..............46     61     78     90     93     93
20 ft wind......S 22   S 20   W 15   W 13   W 12   W 10
20 ft wind gust.32     29     23     20     17     16
Mix hgt (ft)....1900   800    800    600    600    500
Transport wind..S 30   S 24   SW 18  W 15   W 15   W 12
GFDI............1      1      0      0      0      0
Haines index....5      4      4      4      5      5
SDspl kt-ft/100050     17     13     7      7      5

.WEDNESDAY...

Sky/weather.........Sunny (20-30 percent) then becoming partly
                    sunny (50-60 percent).
Max temperature.....Around 70.
Min humidity........37 percent.
Wind (20 ft)........Northwest winds 8 to 10 mph shifting to the
                    northeast around 9 mph late in the afternoon.
Mixing height.......3600 ft AGL.
Transport winds.....Northwest 10 to 17 mph shifting to the east 9
                    to 10 mph late in the afternoon.
Smoke dispersal.....Poor (3200 knot-ft) early in the morning
                    increasing to good (33400 knot-ft) in the
                    afternoon.
GFDI................0.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........7         27        40        39
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Temp............48        57        66        70
RH..............93        67        43        38
20 FT wind......W 9G14    NW 9G14   N 12G16   NE 9G14
Mix hgt (ft)....400       1200      2600      3300
Transport wind..W 12      NW 13     NW 14     E 10
GFDI............0         0         0         0
Haines index....5         5         5         5
SDspl kt-ft/10004         13        31        28

$$
Forecaster...Martin
Requested by...Matt Shanklin
Type of request...PRESCRIBED
.TAG 2412769.0/DMX
.DELDT 04/30/24
.FormatterVersion 2.0.0
.EMAIL matt.shanklin@dnr.iowa.gov