555  
FNUS51 KPBZ 120739  
FWFPBZ  
 
FIRE WEATHER PLANNING FORECAST FOR PENNSYLVANIA  
NATIONAL WEATHER SERVICE PITTSBURGH PA  
239 AM EST TUE DEC 12 2017  
   
DISCUSSION
 
 
MUCH COLDER WEATHER ARRIVES TODAY ALONG WITH SNOW. HEAVY LAKE  
EFFECT SNOW SHOWERS WILL BE POSSIBLE THROUGH MID-WEEK. ANOTHER  
SYSTEM EARLY THURSDAY WILL BRING ADDITIONAL ACCUMULATION. A BRIEF  
WARM UP FOLLOWS THIS WEEKEND.  
 
PAZ021-029-031-073>076-122115-  
ALLEGHENY-WASHINGTON-GREENE-WESTMORELAND-WESTMORELAND RIDGES-  
FAYETTE-FAYETTE RIDGES-  
INCLUDING THE CITIES OF PITTSBURGH METRO AREA, WASHINGTON,  
CANONSBURG, WAYNESBURG, MURRYSVILLE, GREENSBURG, NEW KENSINGTON,  
LIGONIER, DONEGAL, UNIONTOWN, CHAMPION, AND OHIOPYLE  
239 AM EST TUE DEC 12 2017  
 
TODAY TONIGHT WED  
 
CLOUD COVER CLOUDY MCLDY MCLDY  
PRECIP TYPE SNOW SHOWERS SNOW SHOWERS SNOW  
CHANCE PRECIP (%) 80 70 50  
TEMP (24H TREND) 33 (-5) 11 (-19) 25  
RH % (24H TREND) 60 (+6) 82 (-2) 49  
20FT WND-VAL/AM(MPH) W 10 G25 W 11 G23  
20FT WND-RDG/PM(MPH) W 12 G28 W 12 G28 W 9 G22  
PRECIP AMOUNT 0.09 0.04 0.02  
PRECIP DURATION 8 9 1  
PRECIP BEGIN 6 AM CONTINUING CONTINUING  
PRECIP END CONTINUING CONTINUING CONTINUING  
MIXING HGT(M-AGL/MSL) 2160 1260  
MIXING HGT(FT-AGL/MSL)7090 4120  
TRANSPORT WND (MPH) NW 33 W 23  
VENT RATE (KT-FT) 205610 82400  
DISPERSION 5 4  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
WVZ001>004-012-021-122115-  
HANCOCK-BROOKE-OHIO-MARSHALL-WETZEL-MARION-  
INCLUDING THE CITIES OF WEIRTON, FOLLANSBEE, WELLSBURG, WHEELING,  
MOUNDSVILLE, NEW MARTINSVILLE, AND FAIRMONT  
239 AM EST TUE DEC 12 2017  
 
TODAY TONIGHT WED  
 
CLOUD COVER MCLDY MCLDY MCLDY  
PRECIP TYPE SNOW SHOWERS SNOW SHOWERS SNOW  
CHANCE PRECIP (%) 70 20 50  
TEMP (24H TREND) 33 (-7) 13 (-18) 27  
RH % (24H TREND) 53 (+1) 76 (-5) 45  
20FT WND-VAL/AM(MPH) W 10 G24 W 9 G17  
20FT WND-RDG/PM(MPH) NW 11 G25 W 11 G24 W 8 G17  
PRECIP AMOUNT 0.05 0.01 0.02  
PRECIP DURATION 4 1 1  
PRECIP BEGIN 6 AM CONTINUING CONTINUING  
PRECIP END CONTINUING CONTINUING CONTINUING  
MIXING HGT(M-AGL/MSL) 2280 1220  
MIXING HGT(FT-AGL/MSL)7490 3990  
TRANSPORT WND (MPH) NW 31 W 24  
VENT RATE (KT-FT) 202230 83790  
DISPERSION 5 4  
LAL 1 1 1  
HAINES INDEX 3 4 3  
 
REMARKS...NONE.  
 

 
 
MDZ001-WVZ509>514-122115-  
GARRETT-MONONGALIA-  
RIDGES OF EASTERN MONONGALIA AND NORTHWESTERN PRESTON-PRESTON-  
EASTERN PRESTON-WESTERN TUCKER-EASTERN TUCKER-  
INCLUDING THE CITIES OF MOUNTAIN LAKE PARK, OAKLAND MD,  
GRANTSVILLE, MORGANTOWN, COOPERS ROCK, KINGWOOD, BRUCETON MILLS,  
TERRA ALTA, ROWLESBURG, HAZELTON, PARSONS, HENDRICKS,  
SAINT GEORGE, DAVIS, THOMAS, AND CANAAN VALLEY  
239 AM EST TUE DEC 12 2017  
 
TODAY TONIGHT WED  
 
CLOUD COVER CLOUDY MCLDY PCLDY  
PRECIP TYPE SNOW SHOWERS SNOW SHOWERS SNOW  
CHANCE PRECIP (%) 100 80 50  
TEMP (24H TREND) 33 (-6) 8 (-22) 24  
RH % (24H TREND) 59 (+9) 79 (-3) 47  
20FT WND-VAL/AM(MPH) W 12 G29 W 13 G28  
20FT WND-RDG/PM(MPH) W 13 G34 W 15 G34 W 11 G25  
PRECIP AMOUNT 0.21 0.06 0.01  
PRECIP DURATION 11 9 2  
PRECIP BEGIN 6 AM CONTINUING CONTINUING  
PRECIP END CONTINUING CONTINUING CONTINUING  
MIXING HGT(M-AGL/MSL) 2110 1210  
MIXING HGT(FT-AGL/MSL)6910 3950  
TRANSPORT WND (MPH) NW 36 W 35  
VENT RATE (KT-FT) 214210 118500  
DISPERSION 5 5  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
OHZ057>059-068-069-122115-  
MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-  
INCLUDING THE CITIES OF ZANESVILLE, CAMBRIDGE, MARTINS FERRY,  
ST. CLAIRSVILLE, CALDWELL, AND WOODSFIELD  
239 AM EST TUE DEC 12 2017  
 
TODAY TONIGHT WED  
 
CLOUD COVER MCLDY MCLDY MCLDY  
PRECIP TYPE SNOW SHOWERS SNOW SHOWERS SNOW  
CHANCE PRECIP (%) 70 30 60  
TEMP (24H TREND) 31 (-8) 13 (-17) 27  
RH % (24H TREND) 51 (-3) 79 (0) 46  
20FT WND-VAL/AM(MPH) NW 10 G25 W 8  
20FT WND-RDG/PM(MPH) NW 11 G25 NW 10 G23 SW 7  
PRECIP AMOUNT 0.03 0.01 0.02  
PRECIP DURATION 4 1 2  
PRECIP BEGIN 6 AM CONTINUING 1 PM  
PRECIP END CONTINUING 5 AM CONTINUING  
MIXING HGT(M-AGL/MSL) 2310 1120  
MIXING HGT(FT-AGL/MSL)7570 3660  
TRANSPORT WND (MPH) NW 33 W 17  
VENT RATE (KT-FT) 219530 54900  
DISPERSION 5 4  
LAL 1 1 1  
HAINES INDEX 3 4 3  
 
REMARKS...NONE.  
 

 
 
OHZ039>041-048>050-122115-  
TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON-  
INCLUDING THE CITIES OF NEW PHILADELPHIA, DOVER, CARROLLTON,  
MALVERN, EAST LIVERPOOL, SALEM, COLUMBIANA, COSHOCTON, CADIZ,  
AND STEUBENVILLE  
239 AM EST TUE DEC 12 2017  
 
TODAY TONIGHT WED  
 
CLOUD COVER MCLDY MCLDY MCLDY  
PRECIP TYPE SNOW SHOWERS SNOW SHOWERS SNOW  
CHANCE PRECIP (%) 80 30 80  
TEMP (24H TREND) 30 (-6) 12 (-17) 25  
RH % (24H TREND) 58 (0) 85 (+3) 51  
20FT WND-VAL/AM(MPH) NW 11 G26 W 8 G18  
20FT WND-RDG/PM(MPH) NW 12 G27 NW 11 G26 W 7 G17  
PRECIP AMOUNT 0.05 0.02 0.05  
PRECIP DURATION 7 1 3  
PRECIP BEGIN 6 AM CONTINUING CONTINUING  
PRECIP END CONTINUING CONTINUING CONTINUING  
MIXING HGT(M-AGL/MSL) 2240 1110  
MIXING HGT(FT-AGL/MSL)7350 3650  
TRANSPORT WND (MPH) NW 32 W 18  
VENT RATE (KT-FT) 205800 58400  
DISPERSION 5 4  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PAZ007>009-013>016-020-022-122115-  
MERCER-VENANGO-FOREST-LAWRENCE-BUTLER-CLARION-JEFFERSON-BEAVER-  
ARMSTRONG-  
INCLUDING THE CITIES OF SHARON, HERMITAGE, GROVE CITY, OIL CITY,  
FRANKLIN, TIONESTA, NEW CASTLE, ELLWOOD CITY, BUTLER, CLARION,  
PUNXSUTAWNEY, BROOKVILLE, ALIQUIPPA, BEAVER FALLS, AMBRIDGE,  
MONACA, KITTANNING, AND FORD CITY  
239 AM EST TUE DEC 12 2017  
 
TODAY TONIGHT WED  
 
CLOUD COVER CLOUDY MCLDY MCLDY  
PRECIP TYPE SNOW SHOWERS SNOW SHOWERS SNOW  
CHANCE PRECIP (%) 100 80 70  
TEMP (24H TREND) 31 (-1) 11 (-17) 22  
RH % (24H TREND) 69 (+5) 93 (+6) 60  
20FT WND-VAL/AM(MPH) W 9 G25 W 11 G22  
20FT WND-RDG/PM(MPH) W 11 G26 W 11 G25 W 9 G21  
PRECIP AMOUNT 0.10 0.10 0.07  
PRECIP DURATION 12 11 8  
PRECIP BEGIN 6 AM CONTINUING CONTINUING  
PRECIP END CONTINUING CONTINUING CONTINUING  
MIXING HGT(M-AGL/MSL) 2010 1420  
MIXING HGT(FT-AGL/MSL)6590 4650  
TRANSPORT WND (MPH) W 31 W 25  
VENT RATE (KT-FT) 177930 102300  
DISPERSION 5 4  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PAZ023-122115-  
INDIANA-  
INCLUDING THE CITY OF INDIANA  
239 AM EST TUE DEC 12 2017  
 
TODAY TONIGHT WED  
 
CLOUD COVER CLOUDY MCLDY MCLDY  
PRECIP TYPE SNOW SHOWERS SNOW SHOWERS SNOW  
CHANCE PRECIP (%) 100 70 70  
TEMP (24H TREND) 33 (-2) 11 (-19) 22  
RH % (24H TREND) 68 (+8) 88 (0) 57  
20FT WND-VAL/AM(MPH) W 9 G23 W 13 G23  
20FT WND-RDG/PM(MPH) W 12 G28 W 12 G28 W 11 G23  
PRECIP AMOUNT 0.11 0.05 0.03  
PRECIP DURATION 11 9 4  
PRECIP BEGIN 6 AM CONTINUING CONTINUING  
PRECIP END CONTINUING CONTINUING CONTINUING  
MIXING HGT(M-AGL/MSL) 2010 1300  
MIXING HGT(FT-AGL/MSL)6600 4270  
TRANSPORT WND (MPH) W 35 W 28  
VENT RATE (KT-FT) 198000 102480  
DISPERSION 5 4  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
   
FORECAST FOR DAYS 3 THROUGH 7
 
   
THURSDAY
 
SNOW. LOWS AROUND 17. HIGHS IN THE UPPER 20S.  
NORTHWEST WINDS 15 TO 20 MPH.    
FRIDAY
 
MOSTLY CLOUDY. LOWS AROUND 16. HIGHS IN THE UPPER 20S.  
SOUTHWEST WINDS 5 TO 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY. A CHANCE OF SNOW SHOWERS. LOWS AROUND  
20. HIGHS IN THE MID 30S. SOUTHWEST WINDS 10 TO 15 MPH.    
SUNDAY
 
MOSTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS. LOWS IN  
THE MID 20S. HIGHS IN THE LOWER 40S. SOUTHWEST WINDS 10 TO  
15 MPH.    
MONDAY
 
MOSTLY CLOUDY. A CHANCE OF SNOW AND RAIN SHOWERS. LOWS  
IN THE UPPER 20S. HIGHS IN THE UPPER 30S. WEST WINDS 10 TO  
15 MPH.  
 

 
 
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