393  
FNUS71 KCTP 220900  
FWSCTP  
 
SPOT FORECAST FOR PENNCARBOSE EPA/EMA HAZMAT CLEAN-UP...SOMERSET COUNTY EMA  
NATIONAL WEATHER SERVICE STATE COLLEGE PA  
500 AM EDT FRI SEP 22 2017  
 
FORECAST IS BASED ON INCIDENT TIME OF 0500 EDT ON SEPTEMBER 22.  
 
IF CONDITIONS BECOME UNREPRESENTATIVE...  
CONTACT THE NATIONAL WEATHER SERVICE IN STATE COLLEGE.  
   
DISCUSSION
 
 
A RIDGE OF HIGH PRESSURE AT THE SURFACE AND ALOFT WILL REMAIN  
IN PLACE OVER THE COMMONWEALTH THROUGH AT LEAST NEXT TUESDAY.  
THIS HIGH WILL CONTINUE OUR LENGTHY STRING OF FAIR,  
UNSEASONABLY WARM, AND MAINLY DRY WEATHER THROUGHOUT THIS  
ENTIRE PERIOD. THE WIND WILL BE LIGHT AND VARIABLE THROUGH  
THE DAYLIGHT HOURS AND GO PRETTY MUCH CALM EACH NIGHT.  
 
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). AREAS OF FOG  
EARLY IN THE MORNING.  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....AROUND 80.  
MIN HUMIDITY........42 PERCENT.  
SURFACE WINDS.......LIGHT AND VARIABLE WINDS, BECOMING NORTH 5 TO 6  
MPH LATE IN THE MORNING.  
MIXING HEIGHT.......0-1800 FT AGL, INCREASING TO 2500-3200 FT AGL  
LATE IN THE MORNING.  
TRANSPORT WINDS.....NORTH 1 TO 10 MPH.  
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........70 70 70 70 64 52 40 28 22 22 21 20  
WEATHER COV.....ARS ARS ARS  
WEATHER TYPE....FOG FOG FOG  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............56 56 57 61 67 71 75 77 78 79 79 78  
RH..............86 86 93 90 75 66 55 50 48 44 42 45  
SURFACE WND DIR.SW W NW NW NW NW NW N N N N N  
SURFACE WND SPD.2 1 2 3 4 5 5 6 6 6 6 5  
SURFACE WND GST.5 5 5 5 5 10 10 10 10 10 10  
MIX HGT (KFT)...0.1 0.1 0.2 0.9 1.8 2.5 2.9 3.1 3.1 3.2 3.2 2.9  
TRANSP WIND DIR.NW N N N N N N N N N N N  
TRANSP WIND SPD.1 1 2 5 7 9 10 10 10 10 10 10  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT), THEN BECOMING  
MOSTLY CLOUDY (60-70 PERCENT). AREAS OF FOG  
AFTER MIDNIGHT.  
CHANCE OF PCPN......0 PERCENT.  
MIN TEMPERATURE.....AROUND 55.  
MAX HUMIDITY........90 PERCENT.  
SURFACE WINDS.......NORTH WINDS AROUND 5 MPH EARLY IN THE EVENING,  
BECOMING LIGHT AND VARIABLE.  
MIXING HEIGHT.......300-2100 FT AGL, DECREASING TO 0-200 FT AGL IN  
THE LATE EVENING AND OVERNIGHT.  
TRANSPORT WINDS.....NORTHEAST 1 TO 9 MPH.  
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........19 18 18 18 18 18 18 18 27 44 61 70  
WEATHER COV..... ARS ARS ARS ARS  
WEATHER TYPE.... FOG FOG FOG FOG  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............75 72 67 65 64 64 63 62 61 61 60 58  
RH..............52 57 68 73 75 73 75 78 81 81 84 90  
SURFACE WND DIR.N N N N N N NE NE NE NE NE NE  
SURFACE WND SPD.5 4 4 4 4 3 3 3 3 3 3 3  
SURFACE WND GST.10 5 5 5 5 5 5 5 5 5 5 5  
MIX HGT (KFT)...2.1 1.1 0.3 0.1 0.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2  
TRANSP WIND DIR.N N NW N N N N NE NE NE NE NE  
TRANSP WIND SPD.9 7 5 3 2 2 2 3 3 3 2 1  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT), THEN BECOMING  
SUNNY (10-20 PERCENT). AREAS OF FOG EARLY IN  
THE MORNING.  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....AROUND 79.  
MIN HUMIDITY........50 PERCENT.  
SURFACE WINDS.......LIGHT AND VARIABLE WINDS, BECOMING NORTH AROUND  
5 MPH IN THE AFTERNOON, THEN BECOMING LIGHT AND  
VARIABLE LATE.  
MIXING HEIGHT.......100-1600 FT AGL, INCREASING TO 2400-4200 FT AGL  
IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTH AROUND 0 MPH, INCREASING TO NORTHEAST  
AROUND 10 MPH.  
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........75 86 91 70 27 6 7 8 9 9 9 9  
WEATHER COV.....ARS ARS ARS ARS  
WEATHER TYPE....FOG FOG FOG FOG  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............56 57 60 62 65 68 70 72 74 76 77 75  
RH..............93 90 81 78 70 65 61 59 55 52 50 55  
SURFACE WND DIR.NE N N N N N N N N N N N  
SURFACE WND SPD.3 3 3 3 4 4 5 5 5 5 5 4  
SURFACE WND GST.5 5 5 5 5 5 5 10 10 10 10 5  
MIX HGT (KFT)...0.1 0.1 0.2 0.5 1.0 1.6 2.4 3.2 3.8 4.2 4.1 3.7  
TRANSP WIND DIR.NE NE E NE NE NE NE NE NE NE NE NE  
TRANSP WIND SPD.0 0 0 1 3 6 7 8 9 10 10 10  
 

 
FORECASTER...WFO-CTP/LACORTE  
REQUESTED BY...JOEL LANDIS  
TYPE OF REQUEST...HAZMAT  
.TAG 1716133.0/CTP  
.EMAIL LANDISJ@CO.SOMERSET.PA.US  
 
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