2001 HOUGHTON LAKE, MICHIGAN (HTL)



Houghton Lake is located in north–central lower Michigan. The present station is on the northeast shore of Houghton Lake, the largest inland lake in Michigan, with a circumference of about 32 miles. The Muskegon River source is Higgins Lake, 8 miles to the north. It flows through Houghton Lake, then southwestward to Lake Michigan. The station lies within an elongated bowl shaped 1,000–foot plateau, which extends roughly 50 miles north, 75 miles southwest, and about 20 miles southeast of Houghton Lake. In the immediate area, the land is level to rolling, but there are hills and ridges from 100 to 300 feet higher in elevation surrounding the station. Soils are generally sand, or sandy loam supporting little agricultural production, but the area is rich in natural resources of forests, lakes, and streams.

The interior location diminishes the influence of the larger Great Lakes, which lie 70 to 80 miles east and west of Houghton Lake. Hence, the daily temperature range is larger, especially in summer, and temperature extremes are greater than are found nearer the shores of either Lake Michigan or Lake Huron. Temperatures reach the 100 degree mark about one summer out of ten, and at the other extreme, fall below zero an average of twenty–two times during the winter season.

Precipitation is normally a little heavier during the summer season. About 60 percent of the annual total falls in the six–month period from April through September. The heaviest precipitation occurs with summertime thunderstorms.

Snowfall averages above 80 inches per year at Houghton Lake, with considerable variation from year to year. Much heavier snows, averaging over 100 inches a season, fall within a 30– to 60–mile radius to the north and west of Houghton Lake. Seasonal totals have ranged from 24 inches to over 124 inches. Measurable amounts of snow have occurred in nine of the twelve months, and the average number of months with measurable snowfall is six.

Cloudiness is greatest in the late fall and early winter, while sunshine percentage is highest in the spring and summer. Cloudiness is increased in the late fall due to the moisture and warmth picked up by the westerly and northwesterly winds while crossing Lake Michigan.

The growing season is normally quite short, averaging about 90 days between spring and fall freezes.

NORMALS, MEANS, AND EXTREMES

HOUGHTON LAKE, MI (HTL)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 94814

44 22′ 04″ N  84 41′27″ W  GRND: 1148  BARO: 1151  EASTERN (UTC + 5)

2001 Houghton Lake, Michigan (HTL)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 25.3 28.1 38.2 52.7 66.1 74.8 79.6 76.4 67.8 55.8 42.0 29.5 53.0
MEAN DAILY MAXIMUM 37 25.7 29.0 38.9 52.9 66.3 75.3 79.5 76.8 68.1 55.8 41.8 30.6 53.4
HIGHEST DAILY MAXIMUM 37 54 59 76 86 90 103 98 96 92 85 70 64 103
YEAR OF OCCURRENCE 1996 2000 1990 1980 1998 1995 1995 2001 1985 1971 1990 2001 JUN 1995
MEAN OF EXTREME MAXS. 37 42.4 45.7 60.0 74.5 82.9 87.9 90.0 87.9 82.8 73.8 60.5 46.9 69.6
NORMAL DAILY MINIMUM 30 8.4 8.2 18.2 31.6 42.0 50.6 55.4 53.8 46.9 37.5 28.4 15.7 33.1
MEAN DAILY MINIMUM 37 9.4 9.8 18.7 31.5 42.2 51.0 55.4 54.0 46.7 37.2 28.4 17.2 33.5
LOWEST DAILY MINIMUM 37 -26 -34 -23 3 21 29 33 29 21 16 -5 -21 -34
YEAR OF OCCURRENCE 1981 1979 1967 1982 1966 1998 1965 1982 1989 1969 1995 1976 FEB 1979
MEAN OF EXTREME MINS. 37 -14.6 -15.8 -5.7 15.8 28.3 36.2 40.8 39.2 29.6 22.8 12.2 -5.1 15.3
NORMAL DRY BULB 30 16.9 18.2 28.2 42.2 54.1 62.7 67.5 65.1 57.3 46.7 35.2 22.6 43.1
MEAN DRY BULB 37 17.6 19.3 29.0 42.2 54.5 63.2 67.5 65.2 57.4 46.6 35.1 23.7 43.4
MEAN WET BULB 18 19.2 21.0 28.3 38.9 49.6 58.7 59.3 61.9 54.5 41.5 33.2 24.0 40.8
MEAN DEW POINT 18 14.5 15.2 20.4 30.6 39.5 52.8 54.4 57.8 50.3 37.1 29.1 20.4 35.2
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.0 0.0 * 0.8 1.9 0.5 * 0.0 0.0 0.0 3.2
MAXIMUM 32 30 23.6 18.5 9.3 1.0 0.0 0.0 0.0 0.0 0.0 0.0 5.3 19.3 77.0
MINIMUM 32 30 30.8 27.6 27.5 17.2 5.1 0.3 0.0 * 1.7 9.8 21.9 29.6 171.5
MINIMUM 0 30 8.8 8.1 3.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 3.3 23.5
H/C NORMAL HEATING DEG. DAYS 30 1491 1310 1141 684 358 120 35 70 234 567 894 1314 8218
NORMAL COOLING DEG. DAYS 30 0 0 0 0 20 51 112 73 0 0 0 0 256
RH NORMAL (PERCENT) 30 80 76 74 68 65 70 71 76 78 77 82 83 75
HOUR 01 LST 30 83 81 80 77 78 84 85 88 88 85 85 85 83
HOUR 07 LST 30 82 82 83 80 78 81 85 90 92 88 87 85 84
HOUR 13 LST 30 72 69 64 55 50 55 54 60 63 65 73 77 63
HOUR 19 LST 30 77 72 67 58 53 57 58 66 73 74 79 81 68
S PERCENT POSSIBLE SUNSHINE
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 38 2.3 2.0 2.8 1.5 1.5 1.8 2.6 4.0 3.6 2.6 2.6 2.5 29.8
THUNDERSTORMS 38 0.2 0.1 0.8 2.1 3.9 5.4 5.4 5.6 3.6 1.4 0.5 0.2 29.2
CLOUDINESS MEAN:
SUNRISE-SUNSET (OKTAS) 31 6.4 5.9 5.6 5.5 5.1 4.8 4.5 4.6 5.0 5.6 6.5 6.4 5.5
MIDNIGHT-MIDNIGHT (OKTAS) 16 5.9 5.2 5.1 4.7 4.4 4.4 3.9 3.9 4.7 5.0 6.1 6.2 5.0
MEAN NO. DAYS WITH:
CLEAR 31 2.9 4.2 5.9 6.2 7.0 7.0 7.3 7.8 6.3 5.3 2.4 2.4 64.7
PARTLY CLOUDY 31 6.3 6.7 7.2 7.2 9.3 11.2 13.2 11.1 9.3 7.7 5.0 5.9 100.1
CLOUDY 31 21.8 17.4 17.8 16.6 14.1 11.8 10.1 12.1 14.4 18.0 22.6 22.8 199.5
PR MEAN STATION PRESSURE(IN) 12 28.72 28.74 28.72 28.72 28.70 28.71 28.79 28.81 28.78 28.80 28.74 28.71 28.74
MEAN SEA-LEVEL PRES. (IN) 18 30.02 30.06 30.04 29.95 29.97 30.01 29.99 30.04 30.03 30.05 30.02 30.04 30.02
WINDS MEAN SPEED (MPH) 10 9.5 8.8 9.4 9.3 8.7 7.8 7.3 6.9 7.6 8.5 9.3 8.9 8.5
PREVAIL. DIR (TENS OF DEGS) 12 27 27 32 32 27 27 23 23 23 27 27 27 27
MAXIMUM 2-MINUTE:
SPEED (MPH) 5 31 37 32 37 40 51 37 28 30 35 39 33 51
DIR. (TENS OF DEGS) 32 24 28 24 26 19 13 32 29 16 22 26 19
YEAR OF OCCURRENCE 2000 2001 2000 1997 1998 1999 2000 2001 1998 2001 1998 2001 JUN 1999
MAXIMUM 5-SECOND:
SPEED (MPH) 5 44 48 45 52 54 61 46 40 39 46 51 46 61
DIR. (TENS OF DEGS) 33 23 30 22 23 19 13 29 29 16 21 26 19
YEAR OF OCCURRENCE 2000 1999 1999 1997 1998 1999 2000 1997 1998 2001 1998 2001 JUN 1999
PRECIPITATION NORMAL (IN) 30 1.50 1.16 2.02 2.22 2.57 3.02 2.58 3.37 3.41 2.18 2.27 1.95 28.25
MAXIMUM MONTHLY (IN) 37 3.13 3.36 5.67 4.73 5.99 6.67 5.33 7.18 9.49 8.08 5.10 4.48 9.49
YEAR OF OCCURRENCE 1974 1971 1976 1991 1983 1969 1994 1975 1986 1991 1988 1971 SEP 1986
MINIMUM MONTHLY (IN) 37 0.59 0.29 0.19 0.86 0.40 0.85 0.55 0.85 0.01 0.47 0.45 0.34 0.01
YEAR OF OCCURRENCE 2001 1982 2001 1998 1966 1988 1989 1969 1979 1971 1986 1997 SEP 1979
MAXIMUM IN 24 HOURS (IN) 37 1.39 1.52 2.18 1.81 1.94 3.28 3.83 3.12 2.55 3.47 1.82 1.70 3.83
YEAR OF OCCURRENCE 1974 1997 1976 1991 1973 1996 1984 1981 1985 1998 1988 1971 JUL 1984
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 14.9 11.3 12.2 11.7 10.3 10.7 9.0 10.0 11.6 11.9 13.2 15.7 142.5
PRECIPITATION 1.00 30 0.0 * 0.1 0.3 0.3 0.7 0.5 0.7 0.8 0.1 0.1 0.2 3.8
SNOWFALL NORMAL (IN) 30 19.3 12.9 12.0 4.2 0.3 0.0 0.0 0.0 0.* 0.9 9.7 16.9 76.2
MAXIMUM MONTHLY (IN) 33 38.0 23.6 28.7 11.6 2.3 0.0 T T 0.1 4.4 41.9 30.4 41.9
YEAR OF OCCURRENCE 1982 1971 1971 1979 1979 1996 1993 1967 1980 1995 1968 NOV 1995
MAXIMUM IN 24 HOURS (IN) 33 15.4 8.5 11.7 7.6 3.2 0.0 T T 0.1 3.5 14.4 13.2 15.4
YEAR OF OCCURRENCE 1978 1974 1970 1979 1994 1970 1993 1967 1980 1981 1980 JAN 1978
MAXIMUM SNOW DEPTH (IN) 32 24 21 22 7 3 0 0 0 0 1 17 14 24
YEAR OF OCCURRENCE 1979 1979 1978 1973 1994 1992 1995 1972 JAN 1979
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 6.3 4.7 3.5 1.4 0.1 0.0 0.0 0.0 0.0 0.3 3.0 5.6 24.9

2001 Houghton Lake, Michigan (HTL)

PRECIPITATION (inches) 2001 HOUGHTON LAKE, MI (HTL)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.82 0.99 2.36 1.40 1.79 2.00 2.52 4.63 2.67 2.50 0.99 3.48 26.15
1973 1.22 1.33 1.95 1.66 4.88 2.84 2.34 2.29 1.95 3.11 1.34 1.81 26.72
1974 3.13 1.14 1.44 3.47 2.92 4.60 4.70 2.78 2.53 1.40 1.41 1.43 30.95
1975 1.97 1.14 1.50 2.63 2.79 3.79 4.96 7.18 1.52 0.85 2.20 1.33 31.86
1976 1.77 2.49 5.67 1.86 2.86 2.77 1.22 1.07 0.99 1.31 0.75 0.65 23.41
1977 0.60 1.46 2.40 2.29 1.39 0.94 1.72 5.70 4.19 1.89 2.14 2.20 26.92
1978 1.93 0.55 1.20 1.35 2.42 2.38 0.91 4.10 6.70 1.43 1.28 2.08 26.33
1979 1.51 0.63 3.05 3.18 1.85 4.46 0.87 3.90 0.01 2.43 2.47 1.71 26.07
1980 1.61 0.69 1.10 3.30 1.55 3.44 2.29 2.01 3.75 1.91 1.55 1.95 25.15
1981 0.79 2.10 0.88 3.88 1.73 4.02 1.89 7.06 1.89 2.61 2.07 1.08 30.00
1982 2.43 0.29 2.41 2.46 2.98 3.21 3.31 3.25 3.58 1.86 2.52 3.47 31.77
1983 1.20 0.79 3.11 1.86 5.99 0.95 1.40 3.89 4.63 3.66 1.60 1.69 30.77
1984 1.06 0.88 2.28 1.96 2.60 3.01 4.30 2.95 2.74 2.17 1.99 2.93 28.87
1985 1.64 1.99 3.55 2.42 1.87 1.71 2.28 4.76 6.14 1.63 3.56 2.14 33.69
1986 1.06 1.73 2.20 1.73 3.20 5.43 4.38 1.76 9.49 1.75 0.45 0.85 34.03
1987 1.06 0.61 0.78 0.97 1.56 1.04 1.62 6.69 4.35 2.21 2.63 2.45 25.97
1988 2.09 0.75 2.39 2.37 0.56 0.85 2.49 4.50 3.63 3.38 5.10 1.86 29.97
1989 0.97 0.70 2.99 0.98 3.19 2.90 0.55 2.62 1.03 1.30 2.08 0.92 20.23
1990 2.43 1.09 1.47 1.77 4.15 2.57 3.82 3.28 3.00 2.94 2.90 1.55 30.97
1991 1.22 0.62 3.02 4.73 5.03 1.48 4.43 2.36 3.05 8.08 1.88 1.76 37.66
1992 1.29 1.35 1.84 3.13 0.49 1.91 2.86 3.45 3.63 2.75 4.65 1.98 29.33
1993 1.73 0.89 0.62 2.96 2.50 4.84 1.28 5.67 2.10 1.78 1.58 0.74 26.69
1994 1.88 1.44 1.57 2.72 1.45 1.72 5.33 5.52 1.56 1.04 2.86 0.53 27.62
1995 2.10 0.65 1.61 2.96 1.51 3.83 2.52 5.64 1.67 2.20 4.82 1.38 30.89
1996 1.71 1.46 0.96 2.99 1.59 5.84 2.76 3.56 4.41 2.84 0.72 2.29 31.13
1997 2.46 2.60 1.51 1.30 3.33 1.26 2.63 3.58 3.45 1.85 1.40 0.34 25.71
1998 2.12 0.89 4.40 0.86 2.31 2.24 0.65 1.30 2.10 4.00 2.53 1.04 24.44
1999 1.86 1.29 0.40 2.04 2.06 6.31 4.48 2.21 3.19 1.77 0.58 1.63 27.82
2000 1.38 1.45 1.17 1.39 5.15 2.79 4.98 2.15 2.00 0.64 2.32 0.60 26.02
2001 0.59 1.60 0.19 3.22 5.31 2.53 0.81 3.15 3.61 4.61 1.91 0.59 28.12
POR=84 YRS 1.48 1.27 1.89 2.41 2.79 3.07 2.70 2.99 3.11 2.51 2.35 1.66 28.23

2001 Houghton Lake, Michigan (HTL)

AVERAGE TEMPERATURE (F) 2001 HOUGHTON LAKE, MI (HTL)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 16.3 16.4 22.3 36.6 56.9 59.1 66.5 64.4 56.8 41.7 33.6 22.0 41.1
1973 22.1 18.1 38.1 43.1 50.6 64.9 67.7 68.9 57.4 51.3 35.8 22.9 45.1
1974 20.3 14.4 27.0 43.2 50.0 61.6 67.8 65.0 53.9 44.3 36.3 26.1 42.5
1975 22.0 20.7 24.3 37.0 59.7 64.1 68.1 65.0 53.7 49.6 40.8 23.8 44.1
1976 14.0 24.1 30.8 45.5 50.8 66.1 67.0 64.6 55.6 42.3 28.3 13.8 41.9
1977 8.7 17.8 34.8 46.6 60.3 61.0 70.1 62.1 58.3 45.1 35.8 21.4 43.5
1978 14.5 10.8 23.6 39.1 56.9 61.6 65.1 66.4 58.6 44.3 35.9 21.8 41.6
1979 11.5 10.4 30.9 40.0 52.6 62.3 66.9 62.7 59.2 45.7 35.0 27.6 42.1
1980 19.1 15.7 25.0 41.9 56.0 59.2 67.4 68.0 56.7 41.6 33.9 18.9 42.0
1981 14.8 24.0 32.5 44.3 53.0 63.6 66.8 65.6 55.9 42.9 35.6 25.3 43.7
1982 11.4 17.9 25.8 37.3 60.9 57.4 68.6 61.9 57.2 48.9 36.2 31.2 42.9
1983 21.8 25.9 32.4 40.3 48.5 63.3 71.5 68.6 59.7 46.4 36.6 16.8 44.3
1984 12.4 28.2 24.1 44.8 50.1 65.2 66.4 68.8 56.1 49.2 35.4 27.0 44.0
1985 14.9 17.9 30.3 46.5 57.0 59.5 66.1 63.9 59.8 47.5 34.5 18.0 43.0
1986 17.3 18.4 30.9 47.3 56.9 60.5 69.7 62.8 58.1 46.8 32.3 26.8 44.0
1987 21.6 23.4 33.6 47.3 58.1 67.1 71.4 65.6 59.5 43.9 37.7 28.7 46.5
1988 17.3 16.3 28.0 43.7 58.6 64.8 71.4 68.8 57.9 42.4 36.6 23.7 44.1
1989 24.9 15.5 25.0 41.1 54.5 62.2 69.5 64.8 56.2 47.9 30.7 12.9 42.1
1990 26.2 21.3 32.1 44.9 51.9 63.4 66.8 65.0 57.9 45.3 38.9 25.8 45.0
1991 16.1 24.5 33.1 46.9 61.1 67.7 68.6 68.0 55.8 47.9 33.4 25.4 45.7
1992 22.8 24.1 28.6 39.4 54.3 60.4 63.0 62.0 56.8 44.8 33.6 26.1 43.0
1993 21.0 16.2 28.7 40.2 54.6 61.9 70.2 68.8 52.9 44.6 34.7 25.9 43.3
1994 9.3 12.9 30.1 43.2 55.0 65.3 68.1 64.4 61.9 50.9 39.3 30.7 44.3
1995 23.1 18.2 34.3 40.1 54.5 68.9 70.7 72.3 56.9 50.1 29.1 19.5 44.8
1996 15.9 19.8 25.7 36.8 50.8 64.0 64.0 66.3 58.6 47.0 30.6 24.8 42.0
1997 17.0 20.4 27.2 40.3 46.6 64.8 65.8 61.6 57.0 46.0 32.3 28.2 42.3
1998 24.1 30.2 31.2 45.2 60.3 63.0 66.7 66.7 60.4 48.8 37.9 28.7 46.9
1999 17.1 26.1 29.1 44.7 56.1 64.9 69.8 63.1 56.8 44.9 39.7 26.2 44.9
2000 17.8 25.0 38.1 41.4 55.9 62.7 64.7 64.7 57.6 49.6 35.8 16.0 44.1
2001 22.8 20.1 27.7 46.1 56.8 63.4 67.0 67.0 55.5 46.5 42.2 31.4 45.5
POR=83 YRS 18.8 19.7 28.6 42.4 54.5 63.6 67.6 65.6 58.0 47.6 35.3 24.0 43.8

REFERENCE NOTES:

PAGE 1:

THE TEMPERATURE GRAPH SHOWS NORMAL MAXIMUM AND NORMAL MINIMUM DAILY TEMPERATURES (SOLID CURVES) AND THE ACTUAL DAILY HIGH AND LOW TEMPERATURES (VERTICAL BARS).

PAGE 2 AND 3:

H/C INDICATES HEATING AND COOLING DEGREE DAYS.

RH INDICATES RELATIVE HUMIDITY

W/O INDICATES WEATHER AND OBSTRUCTIONS

S INDICATES SUNSHINE.

PR INDICATES PRESSURE.

CLOUDINESS ON PAGE 3 IS THE SUM OF THE CEILOMETER AND SATELLITE DATA NOT TO EXCEED EIGHT EIGHTHS (OKTAS).

GENERAL:

T INDICATES TRACE PRECIPITATION, AN AMOUNT GREATER THAN ZERO BUT LESS THAN THE LOWEST REPORTABLE VALUE.

+ INDICATES THE VALUE ALSO OCCURS ON EARLIER DATES.

BLANK ENTRIES DENOTE MISSING OR UNREPORTED DATA.

NORMALS ARE 30–YEAR AVERAGES (1961–1990).

ASOS INDICATES AUTOMATED SURFACE OBSERVING SYSTEM.

PM INDICATES THE LAST DAY OF THE PREVIOUS MONTH.

POR (PERIOD OF RECORD) BEGINS WITH THE JANUARY DATA MONTH AND IS THE NUMBER OF YEARS USED TO COMPUTE THE MEAN. INDIVIDUAL MONTHS WITHIN THE POR MAY BE MISSING.

WHEN THE POR FOR A NORMAL IS LESS THAN 30 YEARS, THE NORMAL IS PROVISIONAL AND IS BASED ON THE NUMBER OF YEARS INDICATED.

0.* OR * INDICATES THE VALUE OR MEAN–DAYS–WITH IS BETWEEN 0.00 AND 0.05.

CLOUDINESS FOR ASOS STATIONS DIFFERS FROM THE NON–ASOS OBSERVATION TAKEN BY A HUMAN OBSERVER. ASOS STATION CLOUDINESS IS BASED ON TIME–AVERAGED CEILOMETER DATA FOR CLOUDS AT OR BELOW 12,000 FEET AND ON SATELLITE DATA FOR CLOUDS ABOVE 12,000 FEET.

THE NUMBER OF DAYS WITH CLEAR, PARTLY CLOUDY, AND CLOUDY CONDITIONS FOR ASOS STATIONS IS THE SUM OF THE CEILOMETER AND SATELLITE DATA FOR THE SUNRISE TO SUNSET PERIOD.

GENERAL CONTINUED:

CLEAR INDICATES 0–2 OKTAS, PARTLY CLOUDY INDICATES 3–6 OKTAS, AND CLOUDY INDICATES 7 OR 8 OKTAS. WHEN AT LEAST ONE OF THE ELEMENTS (CEILOMETER OR SATELLITE) IS MISSING, THE DAILY CLOUDINESS IS NOT COMPUTED.

WIND DIRECTION IS RECORDED IN TENS OF DEGREES (2 DIGITS) CLOCKWISE FROM TRUE NORTH. "00" INDICATES CALM. "36" INDICATES TRUE NORTH.

RESULTANT WIND IS THE VECTOR AVERAGE OF THE SPEED AND DIRECTION.

AVERAGE TEMPERATURE IS THE SUM OF THE MEAN DAILY MAXIMUM AND MINIMUM TEMPERATURE DIVIDED BY 2.

SNOWFALL DATA COMPRISE ALL FORMS OF FROZEN PRECIPITATION, INCLUDING HAIL.

A HEATING (COOLING) DEGREE DAY IS THE DIFFERENCE BETWEEN THE AVERAGE DAILY TEMPERATURE AND 65 F.

DRY BULB IS THE TEMPERATURE OF THE AMBIENT AIR.

DEW POINT IS THE TEMPERATURE TO WHICH THE AIR MUST BE COOLED TO ACHIEVE 100 PERCENT RELATIVE HUMIDITY.

WET BULB IS THE TEMPERATURE THE AIR WOULD HAVE IF THE MOISTURE CONTENT WAS INCREASED TO 100 PERCENT RELATIVE HUMIDITY.

ON JULY 1, 1996, THE NATIONAL WEATHER SERVICE BEGAN USING THE "METAR" OBSERVATION CODE THAT WAS ALREADY EMPLOYED BY MOST OTHER NATIONS OF THE WORLD. THE MOST NOTICEABLE DIFFERENCE IN THIS ANNUAL PUBLICATION WILL BE THE CHANGE IN UNITS FROM TENTHS TO EIGHTS (OKTAS) FOR REPORTING THE AMOUNT OF SKY COVER.

2001 Houghton Lake, Michigan (HTL)

HEATING DEGREE DAYS (base 65 F) 2001 HOUGHTON LAKE, MI (HTL)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 77 92 242 716 933 1326 1324 1307 829 653 442 54 7995
1973-74 26 25 280 420 871 1298 1380 1411 1171 649 463 135 8129
1974-75 27 56 337 633 856 1197 1327 1234 1254 836 215 101 8073
1975-76 44 68 333 472 720 1272 1575 1180 1054 590 434 53 7795
1976-77 24 92 296 698 1094 1582 1743 1315 932 544 199 159 8678
1977-78 29 134 200 610 869 1347 1556 1513 1276 769 289 144 8736
1978-79 79 46 220 636 869 1333 1655 1530 1053 742 396 135 8694
1979-80 48 109 196 597 893 1153 1416 1424 1233 690 286 209 8254
1980-81 18 27 258 716 928 1423 1553 1143 1001 613 368 80 8128
1981-82 50 44 280 676 872 1222 1658 1315 1209 824 148 224 8522
1982-83 12 139 255 494 855 1040 1331 1087 1003 733 505 116 7570
1983-84 25 29 209 569 846 1487 1628 1062 1262 599 458 53 8227
1984-85 42 28 270 481 881 1168 1547 1313 1071 571 248 172 7792
1985-86 46 88 209 535 908 1451 1474 1297 1048 532 274 148 8010
1986-87 23 109 212 557 975 1179 1335 1159 963 523 271 57 7363
1987-88 41 60 169 649 813 1117 1473 1406 1140 636 225 106 7835
1988-89 7 75 218 692 847 1276 1236 1381 1234 711 333 126 8136
1989-90 19 79 277 520 1025 1607 1196 1217 1009 627 398 97 8071
1990-91 32 51 248 604 773 1208 1509 1127 985 540 219 33 7329
1991-92 37 30 295 525 939 1219 1298 1178 1123 763 341 161 7909
1992-93 83 132 257 619 934 1196 1359 1358 1119 737 331 123 8248
1993-94 4 37 358 627 904 1205 1722 1457 1073 649 320 79 8435
1994-95 26 75 132 431 763 1059 1293 1307 947 741 320 35 7129
1995-96 22 2 260 461 1072 1403 1515 1307 1214 840 440 91 8627
1996-97 65 37 212 552 1021 1240 1481 1246 1162 737 561 64 8378
1997-98 79 134 239 582 972 1135 1260 968 1041 592 175 146 7323
1998-99 34 48 176 499 805 1118 1477 1083 1105 602 282 100 7329
1999-00 17 91 249 617 754 1193 1456 1154 826 701 299 114 7471
2000-01 83 69 256 473 867 1512 1303 1250 1149 558 262 127 7909
2001- 62 62 296 567 677 1032

2001 Houghton Lake, Michigan (HTL)

COOLING DEGREE DAYS (base 65 F) 2001 HOUGHTON LAKE, MI (HTL)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 0 11 19 131 78 4 0 0 0 243
1973 0 0 0 1 0 58 119 155 60 2 0 0 395
1974 0 0 0 1 6 41 120 62 11 0 0 0 241
1975 0 0 0 0 58 83 146 78 2 2 0 0 369
1976 0 0 0 13 0 92 93 86 24 0 0 0 308
1977 0 0 0 0 61 46 192 50 5 0 0 0 354
1978 0 0 0 0 44 49 85 96 34 0 0 0 308
1979 0 0 0 0 18 58 112 45 31 7 0 0 271
1980 0 0 0 2 17 43 98 124 16 0 0 0 300
1981 0 0 0 0 3 47 114 70 13 0 0 0 247
1982 0 0 0 0 27 3 132 52 29 3 0 0 246
1983 0 0 0 0 0 73 235 148 56 0 0 0 512
1984 0 0 0 1 2 65 90 151 11 0 0 0 320
1985 0 0 0 22 8 11 86 61 60 0 0 0 248
1986 0 0 0 8 29 22 175 46 15 0 0 0 295
1987 0 0 0 1 64 125 250 86 12 0 0 0 538
1988 0 0 0 0 35 108 213 199 11 0 0 0 566
1989 0 0 0 0 10 49 164 83 19 0 0 0 325
1990 0 0 0 29 0 55 94 56 41 0 0 0 275
1991 0 0 0 2 104 120 157 130 26 0 0 0 539
1992 0 0 0 0 15 31 28 46 19 0 0 0 139
1993 0 0 0 0 16 34 175 161 4 0 0 0 390
1994 0 0 0 0 19 97 130 64 45 0 0 0 355
1995 0 0 0 0 4 160 202 233 24 5 0 0 628
1996 0 0 0 0 10 67 41 85 25 0 0 0 228
1997 0 0 0 0 0 63 112 39 7 0 0 0 221
1998 0 0 0 0 34 93 98 110 45 0 0 0 380
1999 0 0 0 0 15 107 174 41 10 0 0 0 347
2000 0 0 0 0 24 51 79 65 42 1 0 0 262
2001 0 0 0 0 12 87 132 130 19 0 0 0 380

2001 Houghton Lake, Michigan (HTL)

SNOWFALL (inches) 2001 HOUGHTON LAKE, MI (HTL)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0.0 0.0 0.0 0.6 4.1 29.2 8.3 15.2 5.3 7.9 0.8 0.0 71.4
1973-74 0.0 0.0 0.0 T 4.8 13.0 11.2 17.5 12.3 3.1 1.0 0.0 62.9
1974-75 0.0 0.0 T T 6.0 18.0 11.8 12.4 14.0 4.5 0.0 0.0 66.7
1975-76 0.0 0.0 T T 5.9 14.6 29.6 20.8 17.6 6.0 0.6 0.0 95.1
1976-77 0.0 0.0 0.0 0.7 13.6 18.6 16.3 11.4 3.9 2.7 0.0 0.0 67.2
1977-78 0.0 0.0 0.0 T 16.0 14.0 33.3 13.1 12.5 0.3 0.0 0.0 89.2
1978-79 0.0 0.0 0.0 T 10.5 29.0 21.8 8.3 5.7 11.6 2.3 0.0 89.2
1979-80 0.0 0.0 0.0 0.7 5.0 7.1 14.4 12.3 12.1 7.7 0.0 0.0 59.3
1980-81 0.0 0.0 0.0 4.4 3.2 25.6 19.3 16.3 5.4 0.2 0.0 0.0 74.4
1981-82 0.0 0.0 0.0 3.0 16.1 15.7 38.0 6.1 14.3 5.5 0.0 0.0 98.7
1982-83 0.0 0.0 0.0 0.2 7.7 4.8 15.4 6.4 13.3 2.7 1.0 0.0 51.5
1983-84 0.0 0.0 0.0 0.0 5.0 19.8 17.0 6.3 6.5 5.1 0.4 0.0 60.1
1984-85 0.0 0.0 0.0 0.0 0.6 11.7 25.3 18.7 14.1 10.0 0.0 0.0 80.4
1985-86 0.0 0.0 0.0 0.0 12.6 23.1 12.7 14.0 8.9 0.3 0.0 0.0 71.6
1986-87 0.0 0.0 0.0 T 3.4 10.3 14.1 6.4 2.3 2.0 0.0 0.0 38.5
1987-88 0.0 0.0 0.0 2.4 8.7 18.6 13.4 12.9 10.3 1.4 0.0 0.0 67.7
1988-89 0.0 0.0 0.0 7.8 12.3 9.3 13.5 18.7 3.1 T 0.0
1989-90 0.0 0.0 T 0.6 12.2 15.0 21.7 11.0 2.4 2.1 0.9 0.0 65.9
1990-91 0.0 0.0 0.0 T 9.1 15.3 22.6 8.5 4.5 1.8 0.0 0.0 61.8
1991-92 0.0 0.0 T T 4.9 17.5 15.0 15.8 9.5 3.6 0.0 0.0 66.3
1992-93 0.0 0.0 0.0 3.2 11.8 14.3 14.7 13.1 8.1 2.9 0.0 0.0 68.1
1993-94 0.0 T 0.0 0.1 2.3 9.0 26.2 12.7 9.0 3.9 0.1 0.0 63.3
1994-95 0.0 0.0 0.0 0.0 6.6 7.6 12.2 10.2 7.4 1.9 0.0 0.0 45.9
1995-96 0.0 0.0 T T 41.9 16.4 26.0 8.7 13.4 10.6 0.0
1996-97 T 0.0 T T 8.9
1997-98
1998-99
1999-00 1.6 3.7 16.1 10.4 T
2000-01
2001-
POR=31 YRS T T 0.0 0.7 10.2 16.0 19.3 12.3 11.3 4.2 0.5 0.0 74.5



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