January 1999 Climate Data for Pittsburgh, PA  
See Key below for explanation of abbreviations
DATE JAN 99   |DP|HEATING DD  |SNOWFALL     |PRECIPITATION
   HI LO AV NR|DY|DY  MON SEAS|DAY  MON SEAS| DAY  MON NORM  DEP YEAR NORM  DEP
01*19 10 15 27-12 50   50 1924   T    T  1.8    T    T  .09 -.09    T  .09 -.09
02*31  9 20 27 -7 45   95 1969 2.3  2.3  4.1  .41  .41  .18 +.23  .41  .18 +.23
03*34 14 24 27 -3 41  136 2010   T  2.3  4.1  .41  .82  .27 +.55  .82  .27 +.55
04*14  6 10 27-17 55  191 2065   T  2.3  4.1    T  .82  .36 +.46  .82  .36 +.46
05*11 -1  5 27-22 60  251 2125   0  2.3  4.1    0  .82  .45 +.37  .82  .45 +.37
06*30  1 16 27-11 49  300 2174 2.7  5.0  6.8  .03  .85  .54 +.31  .85  .54 +.31
07*27 12 20 26 -6 45  345 2219  .6  5.6  7.4    T  .85  .62 +.23  .85  .62 +.23
08*42 13 28 26 +2 37  382 2256 2.6  8.2 10.0  .71 1.56  .70 +.86 1.56  .70 +.86
09*40 13 27 26 +1 38  420 2294 2.1 10.3 12.1  .22 1.78  .78+1.00 1.78  .78+1.00
10*21  7 14 26-12 51  471 2345 1.0 11.3 13.1    T 1.78  .86 +.92 1.78  .86 +.92
11*37  3 20 26 -6 45  516 2390 1.4 12.7 14.5  .06 1.84  .94 +.90 1.84  .94 +.90
12*44 36 40 26+14 25  541 2415   T 12.7 14.5  .02 1.86 1.02 +.84 1.86 1.02 +.84
13*47 22 35 26 +9 30  571 2445  .1 12.8 14.6  .32 2.18 1.10+1.08 2.18 1.10+1.08
14*32 17 25 26 -1 40  611 2485  .8 13.6 15.4 1.15 3.33 1.18+2.15 3.33 1.18+2.15
15*32 13 23 26 -3 42  653 2527 3.2 16.8 18.6  .21 3.54 1.26+2.28 3.54 1.26+2.28
16*40 23 32 26 +6 33  686 2560   0 16.8 18.6    0 3.54 1.34+2.20 3.54 1.34+2.20
.........
...........    NORMALS
DATE JAN 99   |DP|HEATING DD  |SNOWFALL     |PRECIPITATION
   HI LO AV NR|DY|DY  MON SEAS|DAY  MON SEAS| DAY  MON NORM  DEP YEAR NORM  DEP
17*51 23 37 26+11 28  714 2588   0 16.8 18.6  .30 3.84 1.42+2.42 3.84 1.42+2.42
18*51 33 42 26+16 23  737 2611   T 16.8 18.6  .50 4.34 1.50+2.84 4.34 1.50+2.84
19*41 31 36 26+10 29  766 2640  .2 17.0 18.8  .01 4.35 1.58+2.77 4.35 1.58+2.77
20*43 31 37 26+11 28  794 2668  .1 17.1 18.9    T 4.35 1.66+2.69 4.35 1.66+2.69
21*40 27 34 25 +9 31  825 2699   0 17.1 18.9  .11 4.46 1.74+2.72 4.46 1.74+2.72
22*69 37 53 25+28 12  837 2711   0 17.1 18.9  .22 4.68 1.82+2.86 4.68 1.82+2.86
23*60 49 55 25+30 10  847 2721   0 17.1 18.9  .13 4.81 1.90+2.91 4.81 1.90+2.91
24*55 33 44 26+18 21  868 2742   T 17.1 18.9  .07 4.88 1.98+2.90 4.88 1.98+2.90
25*36 32 34 26 +8 31  899 2773   T 17.1 18.9    T 4.88 2.06+2.82 4.88 2.06+2.82
26*41 28 35 26 +9 30  929 2803   0 17.1 18.9    0 4.88 2.14+2.74 4.88 2.14+2.74
27*60 25 43 26+17 22  951 2825   0 17.1 18.9    0 4.88 2.22+2.66 4.88 2.22+2.66
28*56 35 46 26+20 19  970 2844   0 17.1 18.9    0 4.88 2.30+2.58 4.88 2.30+2.58
29*37 25 31 26 +5 34 1004 2878   T 17.1 18.9    T 4.88 2.38+2.50 4.88 2.38+2.50
30*38 17 28 26 +2 37 1041 2915   0 17.1 18.9    0 4.88 2.46+2.42 4.88 2.46+2.42
31*40 21 31 26 +5 34 1075 2949   0 17.1 18.9    0 4.88 2.54+2.34 4.88 2.54+2.34


                       ...JANUARY 1999...
TEMPERATURES
AVERAGE MAXIMUM................................ 39.3 DEGREES
AVERAGE MINIMUM................................ 20.8 DEGREES
AVERAGE FOR MONTH.............................. 30.1 DEGREES
DEPARTURE FROM NORMAL.......................... +4.0 DEGREES
HIGHEST AND DATE......................69 DEGREES ON THE 22ND
LOWEST AND DATE.......................-1 DEGREES ON THE  5TH
NUMBER OF DAYS MAX TEMPERATURE 32 DEGREES OR BELOW.........9
NUMBER OF DAYS MIN TEMPERATURE 32 DEGREES OR BELOW........25
NUMBER OF DAYS MIN TEMPERATURE  0 DEGREES OR BELOW.........1
 
HEATING DEGREE DAYS.....................................1075
DEPARTURE FROM NORMAL...................................-131
SEASONAL TOTAL HEATING..................................2949
COOLING DEGREE DAYS.....................................   0
DEPARTURE FROM NORMAL...................................   0
SEASONAL TOTAL COOLING..................................   0
 
PRECIPITATION DATA
TOTAL FOR THE MONTH............................  4.88 INCHES
DEPARTURE FROM NORMAL.......................... +2.34 INCHES
TOTAL FOR THE YEAR.............................  4.88 INCHES
DEPARTURE FROM NORMAL.......................... +2.34 INCHES
MAXIMUM PRECIPITATION IN 24 HOURS.. 1.20 INCHES ON THE 14-15
MONTHLY SNOWFALL....................................... 17.1
DEPARTURE FROM NORMAL.................................. +4.5
MAXIMUM 24 HOUR SNOWFALL........................ 3.2 ON 15TH
 
NUMBER OF DAYS WITH PRECIPITATION 0.01 INCH OR MORE.......17
NUMBER OF DAYS WITH PRECIPITATION 0.10 INCH OR MORE.......12
NUMBER OF DAYS WITH PRECIPITATION 0.50 INCH OR MORE........3
NUMBER OF DAYS WITH PRECIPITATION 1.00 INCH OR MORE........1
 
SUNSHINE
NUMBER OF DAYS WITH CLEAR SKIES............................3
NUMBER OF DAYS WITH PARTLY CLOUDY SKIES....................4
NUMBER OF DAYS WITH CLOUDY SKIES..........................24
 
HIGHEST SEA LEVEL PRESSURE........ 30.62 ON THE 31ST AT 1126
LOWEST SEA LEVEL PRESSURE......... 29.62 ON THE  3RD AT 0545
 
HIGHLIGHTS...
JAN 14 RECORD DAILY PRECIPITATION...1.15 INCHES...PREVIOUS RECORD 0.96
       INCHES IN 1892.
 
JANUARY 1999 WAS THE 9TH WETTEST ON RECORD AND THE WETTEST SINCE 1978.
 
DURING THE FIRST HALF OF JANUARY...TEMPERATURES WERE WELL BELOW NORMAL
HOWEVER READINGS WERE WELL ABOVE NORMAL DURING THE LATTER HALF OF THE
MONTH.
 
THE MAJORITY OF JANUARYS SNOWFALL OCCURRED IN THE FIRST HALF OF THE
MONTH...WHEN 16.8 INCHES WERE RECORDED. NORMAL SNOWFALL FOR THE ENTIRE
MONTH IS 12.6 INCHES. THE SECOND PART OF JANUARY PRODUCED ONLY 0.3
INCHES OF SNOW.
 
THE PRECIPITATION THAT FELL DURING JANUARY HELPED TO ALLEVIATE THE
DROUGHT CONDITIONS. THE 4.88 INCHES OF TOTAL PRECIPITATION WAS
2.34 INCHES ABOVE NORMAL.
 

Key 

HI = High for Day
LO = Low for Day
AV = Average
NR = Normal Average
DP DY = Daily Departure for Normal
HEATING DD = Heating Degree Day for
-----DY = Day
-----MON = Month
-----SEAS = Season
SNOWFALL for DAY...Month and Season
PRECIPITATION for
-----DY = DAY
-----MON = Month
-----NORM = Cumulative Normal for Month
-----DEP = Cumulitive Departure for Normal for Month
-----YEAR = Cumulitive Yearly Total
-----NORM = Cumulative Yearly Normal
-----DEP = Depature from the Yearly Normal