FNUS73 KDLH 080016
FWSDLH

SPOT FORECAST FOR BOOT LAKE RX BURN...USFS
NATIONAL WEATHER SERVICE DULUTH MN
716 PM CDT MON SEP 7 2009

FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON SEPTEMBER 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
ALL FIRE-WEATHER FORECAST PARAMETERS HAVE BEEN UPDATED DURING THE
PAST HOUR.  WE APPRECIATE YOUR PATIENCE WHILE WE COMPLETED THESE.

RIDGING ALOFT WILL CONTINUE TO ALLOW SURFACE HIGH PRESSURE TO
REMAIN ESTABLISHED...AND BUILD OVER LAKE SUPERIOR LATE TONIGHT AND
THROUGHOUT TUESDAY. MEANWHILE...FALLING HEIGHTS ALOFT AND RISING
TEMPERATURES THROUGHOUT THE COLUMN OVER THE RED RIVER VALLEY WILL
CAUSE SURFACE PRESSURES TO FALL WEST OF LAKE SUPERIOR ON TUESDAY.
THE PRESSURE GRADIENT OVER THE ARROWHEAD WILL INCREASE OVERNIGHT
WITH SURFACE WINDS INCREASING...OUT OF THE SOUTH-SOUTHEAST WITH
DAYTIME HEATING. ADDITIONALLY...DENSITY DIFFERENCES BETWEEN THE
CHILLY MARINE AIRMASS AROUND THE WESTERN END OF LAKE SUPERIOR AND
THE CONTINUED STRONG WARMING INLAND...OVER THE ARROWHEAD AND TO
THE WEST...WILL CAUSE SURFACE WINDS TO BE A COUPLE MPH STRONGER
THAN WOULD NORMALLY BE EXPECTED FROM THE SURFACE PRESSURE GRADIENT
DURING THE DAY TUESDAY. SURFACE WINDS WILL SETTLE DOWN ABOUT OR
WITHIN AN HOUR AFTER SUNSET TUESDAY EVENING.

.REST OF TONIGHT...

SKY / WEATHER.......MOSTLY CLEAR. PATCHY FOG IN THE LATE EVENING
                    AND OVERNIGHT.
MIN TEMPERATURE.....44-49.
MAX HUMIDITY........96 PERCENT.
20-FOOT WINDS.......SOUTHEAST WINDS 3 TO 6 MPH.
MIXING HEIGHT.......900 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR (7600).

TIME (CDT)      8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM
TEMP............64  59  56  54  53  52  51  50  49  48  47
RH..............65  75  80  86  86  86  89  93  96  96  96
20 FT WIND DIR..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT WIND SPD..5   4   4   4   3   3   4   4   4   5   5
20 FT WIND GUST.8   7   7   7   6   6   7   7   7   8   12

.TUESDAY...

SKY / WEATHER.......PARTLY CLOUDY. PATCHY FOG EARLY IN THE MORNING.
MAX TEMPERATURE.....76-81.
MIN HUMIDITY........38 PERCENT.
20-FOOT WINDS.......SOUTHEAST WINDS 7 TO 11 MPH INCREASING TO 12 TO
                    16 MPH.
MIXING HEIGHT.......200 FT AGL INCREASING TO 4700 FT AGL IN THE
                    LATE MORNING AND EARLY AFTERNOON...THEN
                    DECREASING TO 2800 FT AGL LATE IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH.
SMOKE DISPERSAL.....FAIR (15100) INCREASING TO EXCELLENT (76400) IN
                    THE LATE MORNING AND AFTERNOON.

TIME (CDT)      7 AM   9 AM   11 AM  1 PM   3 PM   5 PM
TEMP............47     57     67     75     78     77
RH..............96     72     52     41     39     42
20 FT WIND DIR..SE     SE     SE     SE     SE     SE
20 FT WIND SPD..6      8      11     14     14     14
20 FT WIND GUST.13     16     21     23     25     25

$$
FORECASTER...PETER
REQUESTED BY...DOUG MIEDTKE
TYPE OF REQUEST...PRESCRIBED
.TAG 20090908.BOOTL.01/DLH