FNUS73 KGRB 121530
FWSGRB

SPOT FORECAST FOR THUNDER MARSH UNITS 1   6...DNR
NATIONAL WEATHER SERVICE GREEN BAY WI
1030 AM CDT TUE MAY 12 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON MAY 12.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE NATIONAL WEATHER
SERVICE IN GREEN BAY.

.DISCUSSION...WARM SOUTHERLY WINDS WILL BE INCREASING THIS
AFTERNOON AHEAD OF A DEVELOPING STORM SYSTEM OVER THE PLAINS.
STILL HAVE AMPLE DRY AIR ABOVE THE SURFACE...BUT THESE SOUTHERLY
WINDS WILL KEEP DEWPOINTS STEADY OR GIVE THEM A SLIGHT BOOST IN
THE AFTERNOON. AS A RESULT...HUMIDITY LEVELS WILL NOT BE NEARLY AS
LOW AS THE PAST COUPLE DAYS...AND WILL BOTTOM OUT IN THE LOWER
30S. MID-LEVEL CLOUD DECK OVER MINNESOTA WILL BE PUSHING EAST THIS
AFTERNOON...AND MAY PROVIDE A LIGHT SHOWER OR SPRINKLE AFTER 3 PM
TODAY. BETTER CHANCES OF SHOWERS AND THUNDERSTORMS WILL ARRIVE
TONIGHT INTO TOMORROW...WITH SOME HEAVY RAIN POSSIBLE...ESPECIALLY
TOMORROW AFTERNOON.

.REST OF TODAY...

SKY/WEATHER.........PARTLY SUNNY. A CHANCE OF SHOWERS LATE IN THE
                    AFTERNOON. CHANCE OF RAIN 30 PERCENT.
TEMPERATURE.........60 AT IGNITION...MAX 66.
RELATIVE HUMIDITY...37 PERCENT AT IGNITION...MIN 31 PERCENT.
20-FOOT WINDS.......WINDS SOUTH AT 9 MPH AT IGNITION...OTHERWISE
                    SOUTH WINDS 10 TO 15 MPH WITH GUSTS UP TO 22 MPH
                    IN THE AFTERNOON.
MIXING HEIGHT.......AROUND 5800 FT AGL AT IGNITION. MAX...6400 FT
                    AGL.
TRANSPORT WINDS.....SOUTHWEST AT AROUND 17 MPH AT
                    IGNITION...OTHERWISE SOUTH 24 TO 29 MPH.
SMOKE DISPERSAL.....AROUND 128000 OR EXCELLENT AT IGNITION.
                    MAX...164300 OR EXCELLENT.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
                    THUNDERSTORMS IN THE EVENING...THEN SHOWERS AND
                    THUNDERSTORMS LIKELY AFTER MIDNIGHT. CHANCE OF
                    RAIN 60 PERCENT.
TEMPERATURE.........MIN 48.
RELATIVE HUMIDITY...MAX 87 PERCENT.
20-FOOT WINDS.......SOUTH WINDS 10 TO 15 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
MIXING HEIGHT.......MIN...4300 FT AGL DECREASING TO MIN...1100 FT
                    AGL EARLY IN THE EVENING.
TRANSPORT WINDS.....SOUTH 26 TO 31 MPH.
SMOKE DISPERSAL.....MIN...125500 OR EXCELLENT DECREASING TO
                    MIN...24200 OR FAIR EARLY IN THE EVENING.

$$
FORECASTER...MPC
REQUESTED BY...DIANE ANDERSON
TYPE OF REQUEST...PRESCRIBED
.TAG 20090512.THUND.01/GRB