2001 ANCHORAGE, ALASKA (ANC)



Anchorage is in a broad valley with adjacent narrow bodies of water. Cook Inlet, including Knik Arm and Turn again Arm, lies approximately 2 miles to the west, north, and south. The terrain rises gradually to the east for about 10 miles, with marshes interspersed with glacial moraines, shallow depressions, small streams, and knolls. Beyond this area, the Chugach Mountains rise abruptly into a range oriented north–northeast to south–southwest, with average elevation 4,000 to 5,000 feet and some peaks to 8,000 or 10,000 feet. The Chugach Range acts as a barrier to the influx of warm, moist air from the Gulf of Alaska, so the average annual precipitation is only 10 to 15 percent of that at stations located on the Gulf of Alaska side of the Chugach Range. The Alaska Mountain Range lies in a long arc from southwest, through northwest, to northeast, approximately 100 miles distant from Anchorage. During the winter, this range is an effective barrier to the influx of very cold air from the north side of the range.

The four seasons are well marked in Anchorage. In the summer, high temperatures average about 60 degrees and low temperatures nearly 50 degrees. Temperatures in the 70s are considered very warm. On summer days, temperatures on the east side of Anchorage may be about 10 degrees warmer than the official airport readings. Rain increases after mid–June. About two–thirds of the days in July and August are cloudy and one–third have rain.

Autumn is brief, beginning in early September and ending in mid–October. Temperatures begin to fall in September with snow becoming more frequent in October.

Winter can be considered as mid–October to early April when streams and lakes are frozen. Temperatures steadily decrease into January when the highs are near 20 degrees and lows near 5 degrees. The coldest weather is normally in January, when very cold days have high temperatures below zero. Cold days generally have clear skies and calm wind. Mild days do occur with temperatures in the 30s. On cold winter nights, temperatures on the east side of Anchorage may be 10–20 degrees lower than airport readings on the west side. Most winter precipitation is snow, but rain may occur on a few days.

Annual snowfall varies from about 70 inches on the west side to about 90 inches on the east side of Anchorage at low elevations. Along the Chugach Mountains, snow totals increase steadily with increasing elevations and winter arrives a month earlier and stays a month longer at the 1,000 to 2,000 foot level. Most snow is light or dry, i.e., low in water content. Freezing rain is extremely rare. Fog, made of water droplets, occurs on about fifteen days. In general, ice–fog does not occur in Anchorage.

Spring begins in late April and May when days are warm and sunny, nights are cool, and precipitation is exceedingly small. Foliage turns green by late May.

The wind in Anchorage is generally light. However, on several days each winter, strong northerly winds, up to 90 mph, affect the entire Anchorage area. Also during the winter there are about eight occurrences of very strong southeast winds which affect only the east side of Anchorage and the slopes of the Chugach Mountains. These winds occur more often above the 800 feet elevation in the Chugach where winds are funneled thru creek canyons. On the east side of Anchorage, damaging winds of over 100 mph have been recorded.

The average occurrence of the first snow is mid–October, but has occurred as early as mid–September. The average date of the last snow is mid–April, but has occurred as late as early May. The growing season is about 125 days. Average occurrence of the last temperature of 32 degrees in spring is mid–May and the first in fall is mid–September. Daylight varies from about 19 hours in late June to 6 hours in late December with 12 hours of daylight occurring in late September and late March.

NORMALS, MEANS, AND EXTREMES

ANCHORAGE, AK (ANC)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 26451

61 10′ 30″ N  149 59′ 36″ W  GRND:  130  BARO:   133   ALASKA (UTC + 9)

2001 Anchorage, Alaska (ANC)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 21.4 25.8 33.1 42.8 54.4 61.6 65.2 63.0 55.2 40.5 27.2 22.5 42.7
MEAN DAILY MAXIMUM 48 21.5 25.6 33.0 43.5 54.9 62.4 65.1 63.1 55.2 40.2 27.6 22.3 42.9
HIGHEST DAILY MAXIMUM 48 50 48 51 65 77 85 82 82 73 61 53 48 85
YEAR OF OCCURRENCE 1961 1991 1984 1976 1969 1969 1989 1978 1957 1993 1979 1999 JUN 1969
MEAN OF EXTREME MAXS. 48 40.1 41.8 44.4 54.2 66.7 73.5 75.4 72.8 64.5 53.2 42.3 40.7 55.8
NORMAL DAILY MINIMUM 30 8.4 11.5 18.1 28.6 38.8 47.2 51.7 49.5 41.6 28.7 15.1 10.0 29.1
MEAN DAILY MINIMUM 48 8.3 11.4 17.5 28.6 38.9 47.3 51.5 49.4 41.2 28.1 15.8 9.6 29.0
LOWEST DAILY MINIMUM 48 -34 -28 -24 –4 17 33 38 31 19 –5 -21 -30 -34
YEAR OF OCCURRENCE 1975 1999 1971 1985 1964 1961 1964 1984 1992 1956 1956 1964 JAN 1975
MEAN OF EXTREME MINS. 48 –13.2 –8.6 –.8 16.9 29.7 39.4 44.3 39.6 29.3 11.2 –3.0 –12.3 14.4
NORMAL DRY BULB 30 14.9 18.7 25.7 35.8 46.6 54.4 58.4 56.3 48.4 34.6 21.2 16.3 35.9
MEAN DRY BULB 48 14.9 18.6 25.4 36.1 46.9 54.9 58.4 56.2 48.2 34.1 21.6 15.9 35.9
MEAN WET BULB 18 16.7 18.0 24.1 33.0 41.8 49.5 54.0 52.4 45.2 31.1 20.5 18.2 33.7
MEAN DEW POINT 18 12.4 13.3 17.5 25.5 34.0 43.4 49.8 48.3 41.0 26.4 16.4 14.6 28.6
NORMAL NO. DAYS WITH:
MAXIMUM 70 30 0.0 0.0 0.0 0.0 0.6 3.4 6.5 3.4 0.1 0.0 0.0 0.0 14.0
MAXIMUM 32 30 24.8 19.9 11.5 2.0 0.0 0.0 0.0 0.0 0.0 4.6 20.8 24.5 108.1
MINIMUM 32 30 30.5 27.3 28.3 20.3 2.7 0.0 0.0 0.1 3.2 19.8 28.2 30.2 190.6
MINIMUM 0 30 9.8 7.2 2.3 0.0 0.0 0.0 0.0 0.0 0.0 0.1 3.2 7.2 29.8
H/C NORMAL HEATING DEG. DAYS 30 1553 1296 1218 876 570 318 205 270 498 942 1314 1510 10570
NORMAL COOLING DEG. DAYS 30 0 0 0 0 0 0 0 0 0 0 0 0 0
RH NORMAL (PERCENT)
HOUR 03 LST 30 74 73 71 72 72 75 80 83 82 78 79 77 76
HOUR 09 LST 30 74 74 70 66 64 68 73 78 80 78 78 77 73
HOUR 15 LST 30 72 67 57 54 50 56 62 65 64 67 74 76 64
HOUR 21 LST 30 73 71 68 64 59 62 69 76 78 76 78 77 71
S PERCENT POSSIBLE SUNSHINE 40 34 42 50 50 50 46 42 38 38 35 31 26 40
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 48 5.7 4.3 1.6 0.7 0.3 0.1 0.2 0.9 1.3 2.1 3.5 4.7 25.4
THUNDERSTORMS 48 0.0 0.0 0.0 0.0 0.1 0.1 0.5 0.2 0.1 0.0 0.0 0.0 1.0
CLOUDINESS MEAN:
SUNRISE–SUNSET (OKTAS) 44 5.6 5.7 5.4 5.8 6.1 6.3 6.3 6.3 6.3 6.1 5.8 6.0 6.0
MIDNIGHT–MIDNIGHT (OKTAS) 33 5.5 5.4 5.3 5.6 6.1 6.4 6.4 6.2 6.0 5.8 5.6 5.9 5.9
MEAN NO. DAYS WITH:
CLEAR 45 7.1 6.3 7.7 5.7 3.9 2.8 3.2 3.2 3.6 5.0 5.5 5.6 59.6
PARTLY CLOUDY 45 4.8 3.7 5.6 6.1 6.6 6.9 5.8 6.1 5.3 4.6 4.6 3.9 64.0
CLOUDY 45 19.3 18.1 17.6 18.3 20.4 20.2 21.2 21.1 20.5 20.6 19.3 20.9 237.5
PR MEAN STATION PRESSURE(IN) 29 29.48 29.58 29.58 29.60 29.71 29.80 29.80 29.79 29.60 29.50 29.49 29.48 29.62
MEAN SEA–LEVEL PRES. (IN) 18 29.64 29.75 29.73 29.77 29.86 29.91 29.97 29.90 29.77 29.66 29.63 29.62 29.77
WINDS MEAN SPEED (MPH) 48 6.4 6.9 7.1 7.3 8.5 8.4 7.3 6.9 6.7 6.8 6.4 6.2 7.1
PREVAIL. DIR (TENS OF DEGS) 38 36 36 36 16 16 16 16 16 16 36 01 01 36
MAXIMUM 2–MINUTE:
SPEED (MPH) 3 34 41 29 33 26 33 30 29 33 29 31 38 41
DIR. (TENS OF DEGS) 16 15 02 15 16 18 17 04 15 18 17 16 15
YEAR OF OCCURRENCE 1999 2000 1999 2001 1999 1999 2001 2000 2000 2000 2000 1999 FEB 2000
MAXIMUM 5–SECOND:
SPEED (MPH) 3 47 58 41 45 36 44 40 38 47 40 39 49 58
DIR. (TENS OF DEGS) 16 12 11 18 18 17 15 15 15 17 16 16 12
YEAR OF OCCURRENCE 1999 2000 2000 2001 2001 1999 1999 2001 2000 2000 2000 1999 FEB 2000
PRECIPITATION NORMAL (IN) 30 0.79 0.78 0.69 0.67 0.73 1.14 1.71 2.44 2.70 2.03 1.11 1.12 15.91
MAXIMUM MONTHLY (IN) 48 2.13 3.07 2.76 1.91 1.93 3.40 4.49 9.77 6.64 4.11 2.84 2.67 9.77
YEAR OF OCCURRENCE 1949 1955 1979 1977 1989 1962 2001 1989 1990 1986 1976 1955 AUG 1989
MINIMUM MONTHLY (IN) 48 0.02 0.07 T T 0.02 0.17 0.42 0.33 0.72 0.35 0.08 0.09 T
YEAR OF OCCURRENCE 1982 1958 1983 1969 1957 1993 1972 1969 1998 1960 1985 1995 MAR 1983
MAXIMUM IN 24 HOURS (IN) 48 1.19 1.16 1.25 0.78 1.18 1.84 2.37 4.12 1.92 1.60 1.66 1.62 4.12
YEAR OF OCCURRENCE 1961 1956 1986 1989 1980 1962 2001 1989 1961 1986 1964 1955 AUG 1989
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 7.7 8.0 7.3 5.8 7.1 7.9 11.5 13.4 14.5 12.2 9.6 11.0 116.0
PRECIPITATION 1.00 30 * 0.0 * 0.0 0.0 0.1 0.1 0.1 0.2 * * 0.0 0.5
SNOWFALL NORMAL (IN) 30 8.8 11.0 9.1 5.8 0.2 0.0 0.0 0.0 0.3 8.0 10.5 13.9 67.6
MAXIMUM MONTHLY (IN) 48 28.6 52.1 31.0 27.6 6.1 0.0 0.0 T 4.6 28.1 38.8 41.6 52.1
YEAR OF OCCURRENCE 2000 1996 1979 1963 2001 1997 1965 1996 1994 1955 FEB 1996
MAXIMUM IN 24 HOURS (IN) 48 10.5 13.9 14.5 9.1 5.0 0.0 0.0 T 3.5 14.6 16.4 17.7 17.7
YEAR OF OCCURRENCE 1955 1996 1959 1955 2001 1997 1965 1996 1964 1955 DEC 1955
MAXIMUM SNOW DEPTH (IN) 47 833 840 906 356 17 0 0 0 1 105 416 715 906
YEAR OF OCCURRENCE 1956 1956 1959 1955 1955 1992 1991 1994 1994 MAR 1959
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 2.8 3.3 2.7 1.5 0.0 0.0 0.0 0.0 0.2 2.3 3.5 4.6 20.9

2001 Anchorage, Alaska (ANC)

PRECIPITATION (inches) 2001 ANCHORAGE, AK (ANC)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.56 0.63 0.68 0.73 0.81 0.61 0.42 1.40 4.42 2.89 0.76 0.72 14.63
1973 0.72 0.11 0.65 0.33 0.14 1.07 0.60 3.40 0.76 1.74 0.78 0.38 10.68
1974 0.02 1.15 0.60 0.61 0.34 0.69 1.22 1.62 1.53 2.63 1.01 2.00 13.42
1975 0.43 0.77 0.54 1.71 0.40 0.47 1.33 1.19 4.52 0.69 0.10 0.89 13.04
1976 0.98 0.33 1.77 0.74 0.16 0.33 0.60 0.97 3.50 1.29 2.84 1.03 14.54
1977 1.35 0.52 0.84 1.91 0.46 0.49 1.37 1.35 4.08 1.92 0.53 0.69 15.51
1978 0.39 1.19 0.45 0.02 0.03 3.09 1.78 0.54 2.16 1.65 0.85 2.60 14.75
1979 0.23 0.69 2.76 0.94 0.15 1.79 3.84 1.56 2.73 2.54 2.77 1.15 21.15
1980 1.28 1.18 0.30 0.19 1.68 2.73 2.27 3.06 2.53 3.05 0.49 0.41 19.17
1981 0.93 0.97 0.41 0.19 0.81 0.83 4.39 4.96 2.15 3.49 1.85 0.36 21.34
1982 0.02 0.69 0.42 0.27 0.54 1.56 2.41 2.33 4.66 2.95 1.72 0.11 17.68
1983 0.21 0.23 T 1.36 0.59 0.66 0.55 2.89 2.29 2.67 0.23 0.48 12.16
1984 1.30 1.08 0.08 0.93 0.96 1.10 1.11 3.21 2.59 1.38 0.15 1.08 14.97
1985 0.70 0.67 0.86 0.50 1.45 1.01 0.99 3.54 3.17 1.07 0.08 1.47 15.51
1986 0.20 0.55 1.70 0.42 0.50 0.33 2.02 3.62 2.85 4.11 1.23 1.42 18.95
1987 1.72 0.20 0.17 0.24 0.67 1.09 1.89 0.43 1.91 2.60 1.90 1.12 13.94
1988 0.38 0.32 0.65 0.37 0.56 0.79 0.64 3.77 1.26 2.96 1.11 1.51 14.32
1989 0.26 0.17 0.22 0.98 1.93 1.14 2.89 9.77 3.92 3.63 1.01 1.63 27.55
1990 1.42 1.46 0.46 0.27 0.71 1.52 0.81 1.90 6.64 0.73 1.31 1.78 19.01
1991 0.62 0.42 0.65 0.23 0.12 0.18 2.82 3.54 3.41 1.93 1.57 1.82 17.31
1992 1.17 1.04 0.31 0.08 0.58 1.21 0.79 2.49 2.83 2.08 1.17 0.69 14.44
1993 0.94 1.17 0.29 0.09 1.17 0.17 0.57 4.02 4.27 1.90 2.00 0.30 16.89
1994 0.59 0.28 1.51 0.45 0.51 1.34 0.57 1.02 1.66 1.21 2.47 1.51 13.12
1995 0.52 1.00 0.88 0.08 1.11 0.91 3.01 2.19 2.93 0.95 0.09 0.09 13.76
1996 0.11 2.40 0.42 0.08 0.20 0.50 2.04 2.53 1.93 2.63 1.38 0.24 14.46
1997 0.12 0.52 0.01 0.25 1.12 0.60 1.36 8.37 2.53 1.93 0.87 1.80 19.48
1998 0.45 0.24 0.07 0.39 0.63 2.70 1.01 3.25 0.72 0.54 0.18 1.47 11.65
1999 0.37 0.28 0.61 0.29 1.30 1.10 2.15 4.62 3.17 2.63 0.35 1.43 18.30
2000 1.04 0.54 0.48 0.39 0.69 1.43 2.58 1.68 3.24 0.59 1.13 0.58 14.37
2001 1.10 0.85 0.88 0.34 0.48 0.24 4.49 0.97 1.14 1.57 0.26 0.20 12.52
POR=58 YRS 0.79 0.79 0.62 0.51 0.66 1.09 1.86 2.63 2.57 1.71 0.98 1.01 15.22

2001 Anchorage, Alaska (ANC)

AVERAGE TEMPERATURE (F) 2001 ANCHORAGE, AK (ANC)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 6.4 13.5 15.7 26.8 43.3 51.9 59.0 56.6 44.5 31.7 21.3 12.4 31.9
1973 2.9 13.1 24.2 35.8 43.6 51.4 57.8 53.8 45.7 32.2 13.6 18.3 32.7
1974 6.8 14.1 23.3 37.9 47.9 55.5 57.3 56.3 49.8 34.5 22.6 18.8 35.4
1975 11.9 12.9 22.5 32.9 46.3 53.0 58.6 56.6 49.3 34.6 14.2 11.6 33.7
1976 17.1 12.8 24.1 34.8 44.9 53.7 58.9 56.3 47.4 33.4 30.6 23.1 36.4
1977 32.0 32.7 24.7 35.7 46.9 57.8 62.6 60.3 50.7 38.3 15.3 11.3 39.0
1978 21.2 26.3 29.3 39.1 49.0 54.5 58.8 59.8 51.5 39.3 26.3 21.4 39.7
1979 22.3 10.6 31.6 38.8 50.2 55.9 60.4 58.8 52.0 41.1 33.5 10.0 38.8
1980 14.3 27.4 27.2 39.3 45.8 53.2 57.0 54.4 46.7 37.2 27.6 0.8 35.9
1981 31.5 24.8 34.4 36.0 50.7 53.8 57.4 54.8 47.9 36.0 21.8 15.9 38.8
1982 6.4 15.5 26.3 33.1 44.5 52.9 56.2 54.7 47.5 26.6 21.0 21.5 33.9
1983 16.2 21.4 28.7 37.4 48.7 55.9 58.5 56.1 45.3 34.4 24.9 16.7 37.0
1984 18.8 19.4 36.4 38.8 49.6 58.8 60.8 56.6 49.3 35.5 19.8 18.9 38.6
1985 30.3 13.5 26.7 28.4 45.1 51.9 58.5 55.2 47.6 30.3 14.0 27.5 35.8
1986 25.6 21.8 24.1 31.0 46.6 54.6 58.0 54.3 48.6 39.0 25.0 28.3 38.1
1987 22.8 25.3 26.8 37.9 47.2 51.9 57.1 57.3 48.0 38.9 26.9 18.2 38.2
1988 18.0 22.7 31.3 37.1 48.5 55.2 58.8 56.0 48.0 33.3 20.5 22.0 37.6
1989 3.5 17.6 23.6 39.3 46.3 55.3 59.4 59.0 50.6 34.0 17.2 24.2 35.8
1990 15.5 3.8 28.6 39.9 49.9 57.1 58.6 57.8 49.6 32.3 9.9 14.8 34.8
1991 15.9 19.6 23.7 37.7 46.6 55.7 57.5 55.5 51.0 33.0 25.0 20.5 36.8
1992 20.3 15.0 24.9 35.2 46.1 55.9 59.5 55.8 40.3 31.2 27.1 15.0 35.5
1993 14.5 21.0 28.8 40.6 50.7 56.3 61.1 58.8 48.8 38.7 25.2 24.0 39.0
1994 21.7 17.1 25.7 38.6 47.1 56.7 58.8 58.8 48.6 33.5 15.3 15.7 36.5
1995 15.6 20.7 18.6 40.4 48.8 56.0 59.2 57.9 53.7 38.1 21.0 19.0 37.4
1996 6.1 15.8 29.2 38.6 50.1 56.9 59.9 56.7 46.5 25.4 19.0 13.0 34.8
1997 15.9 30.7 24.6 38.2 48.0 56.7 60.8 58.1 50.4 29.6 28.0 16.8 38.2
1998 15.5 25.8 30.1 40.2 47.3 54.7 57.3 53.8 49.0 35.9 23.5 14.3 37.3
1999 11.9 7.2 24.1 34.5 45.7 55.3 58.4 56.9 48.9 34.0 19.7 14.9 34.3
2000 14.8 25.9 29.6 37.4 46.1 55.1 56.8 54.8 47.1 34.8 29.7 25.1 38.1
2001 27.5 23.1 28.8 37.7 44.8 58.1 57.7 58.4 49.2 30.1 19.6 10.8 37.2
POR=58 YRS 14.2 18.1 24.8 35.6 46.5 54.5 58.2 56.0 48.0 34.3 21.7 15.5 35.6

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 Anchorage, Alaska (ANC)

HEATING DEGREE DAYS (base 65 F) 2001 ANCHORAGE, AK (ANC)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 185 252 608 1025 1308 1627 1925 1448 1258 866 654 399 11555
1973-74 216 342 573 1012 1532 1440 1797 1416 1285 805 526 279 11223
1974-75 235 263 452 937 1263 1425 1643 1454 1313 954 575 354 10868
1975-76 192 252 463 937 1517 1654 1485 1511 1260 897 615 332 11115
1976-77 184 262 521 972 1028 1294 1017 897 1241 872 554 208 9050
1977-78 75 144 421 820 1486 1659 1349 1077 1100 771 491 308 9701
1978-79 186 160 400 792 1153 1344 1321 1515 1029 781 454 268 9403
1979-80 138 184 384 735 937 1704 1568 1083 1164 764 592 347 9600
1980–81 243 320 542 855 1115 1990 1032 1122 943 863 438 329 9792
1981–82 230 307 507 893 1290 1516 1813 1382 1191 949 625 356 11059
1982–83 261 313 520 1184 1315 1342 1507 1216 1117 821 500 267 10363
1983–84 194 269 585 945 1194 1491 1425 1319 880 778 471 179 9730
1984–85 129 254 464 906 1350 1423 1070 1437 1182 1091 610 388 10304
1985–86 193 298 516 1065 1523 1155 1215 1206 1260 1013 564 307 10315
1986–87 215 325 486 800 1194 1133 1303 1104 1176 805 543 386 9470
1987–88 243 232 506 801 1136 1444 1450 1221 1037 830 504 285 9689
1988-89 184 270 503 975 1331 1326 1908 1322 1277 765 573 286 10720
1989-90 173 181 423 956 1428 1255 1533 1715 1121 746 465 237 10233
1990-91 191 222 457 1006 1648 1552 1518 1265 1273 813 563 273 10781
1991-92 226 287 414 988 1193 1373 1380 1444 1240 891 579 268 10283
1992-93 161 280 735 1039 1131 1543 1563 1226 1117 725 436 252 10208
1993-94 125 187 477 808 1191 1267 1334 1335 1212 785 548 243 9512
1994-95 183 190 485 968 1488 1523 1526 1239 1433 734 496 265 10530
1995-96 172 214 335 826 1314 1425 1827 1423 1102 783 456 239 10116
1996-97 151 251 549 1220 1375 1608 1516 956 1246 796 520 249 10437
1997-98 123 207 432 1090 1103 1486 1530 1093 1073 739 540 302 9718
1998-99 232 340 475 895 1240 1566 1638 1611 1262 908 592 286 11045
1999-00 204 248 478 953 1352 1544 1548 1126 1090 821 579 291 10234
2000–01 245 312 534 931 1052 1230 1154 1168 1113 812 618 199 9368
2001– 220 200 466 1072 1356 1673

2001 Anchorage, Alaska (ANC)

COOLING DEGREE DAYS (base 65 F) 2001 ANCHORAGE, AK (ANC)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 0 0 0 5 0 0 0 0 0 5
1973 0 0 0 0 0 0 0 0 0 0 0 0 0
1974 0 0 0 0 0 0 1 0 0 0 0 0 1
1975 0 0 0 0 0 0 2 0 0 0 0 0 2
1976 0 0 0 0 0 0 3 0 0 0 0 0 3
1977 0 0 0 0 0 0 8 3 0 0 0 0 11
1978 0 0 0 0 0 0 1 7 0 0 0 0 8
1979 0 0 0 0 0 0 4 0 0 0 0 0 4
1980 0 0 0 0 0 0 0 0 0 0 0 0 0
1981 0 0 0 0 0 0 0 0 0 0 0 0 0
1982 0 0 0 0 0 0 0 0 0 0 0 0 0
1983 0 0 0 0 0 0 0 0 0 0 0 0 0
1984 0 0 0 0 0 0 5 1 0 0 0 0 6
1985 0 0 0 0 0 0 0 0 0 0 0 0 0
1986 0 0 0 0 0 0 4 0 0 0 0 0 4
1987 0 0 0 0 0 0 2 0 0 0 0 0 2
1988 0 0 0 0 0 0 0 0 0 0 0 0 0
1989 0 0 0 0 0 0 5 2 0 0 0 0 7
1990 0 0 0 0 0 3 1 2 0 0 0 0 6
1991 0 0 0 0 0 0 0 0 0 0 0 0 0
1992 0 0 0 0 0 0 0 0 0 0 0 0 0
1993 0 0 0 0 0 0 11 0 0 0 0 0 11
1994 0 0 0 0 0 0 0 2 0 0 0 0 2
1995 0 0 0 0 0 1 0 0 0 0 0 0 1
1996 0 0 0 0 0 0 0 0 0 0 0 0 0
1997 0 0 0 0 0 5 0 1 0 0 0 0 6
1998 0 0 0 0 0 0 0 0 0 0 0 0 0
1999 0 0 0 0 0 0 7 0 0 0 0 0 7
2000 0 0 0 0 0 0 0 0 0 0 0 0 0
2001 0 0 0 0 0 0 0 0 0 0 0 0 0

2001 Anchorage, Alaska (ANC)

SNOWFALL (inches) 2001 ANCHORAGE, AK (ANC)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0.0 0.0 1.5 3.3 10.7 6.5 8.1 1.0 16.1 1.3 0.0 0.0 48.5
1973-74 0.0 0.0 0.0 6.6 10.6 6.7 0.5 23.3 8.2 1.9 0.0 0.0 57.8
1974-75 0.0 0.0 0.0 4.4 8.4 29.2 5.7 15.4 8.3 16.1 0.4 0.0 87.9
1975-76 0.0 0.0 0.0 T 2.0 11.5 9.7 1.8 30.7 5.6 T 0.0 61.3
1976-77 0.0 0.0 0.0 11.4 11.1 13.8 6.1 2.1 9.5 14.0 0.0 0.0 68.0
1977-78 0.0 0.0 1.0 13.2 12.6 10.6 7.3 20.8 9.5 T 0.0 0.0 75.0
1978-79 0.0 0.0 0.0 3.9 8.5 35.2 3.6 6.2 31.0 2.8 0.0 0.0 91.2
1979-80 0.0 0.0 0.0 4.3 13.7 16.0 12.0 18.7 3.4 0.8 0.0 0.0 68.9
1980–81 0.0 0.0 0.0 10.2 4.2 1.4 5.0 6.6 4.4 1.1 T 0.0 32.9
1981–82 0.0 0.0 1.5 6.3 20.0 7.6 0.5 0.6 5.6 3.5 0.7 0.0 46.3
1982–83 0.0 0.0 0.0 27.1 23.4 1.9 3.7 4.3 T 11.0 0.0 0.0 71.4
1983–84 0.0 0.0 T 23.7 2.1 10.5 15.0 18.9 0.2 9.8 0.0 0.0 80.2
1984–85 0.0 0.0 0.0 3.3 1.8 18.0 9.7 7.9 12.8 7.3 1.3 0.0 62.1
1985–86 0.0 0.0 0.0 0.8 1.5 6.1 5.1 6.1 21.0 5.4 0.1 0.0 46.1
1986–87 0.0 0.0 0.0 T 3.8 10.1 18.5 2.2 2.5 1.6 0.0 0.0 38.7
1987–88 0.0 0.0 0.0 T 29.2 26.3 4.7 9.2 8.5 2.0 0.0 0.0 79.9
1988-89 0.0 0.0 0.0 12.0 15.3 18.6 10.1 2.3 5.1 T 0.2 0.0 63.6
1989-90 0.0 0.0 0.0 16.3 10.1 20.0 27.5 23.0 4.7 0.8 T 0.0 102.4
1990-91 0.0 0.0 0.0 1.6 16.9 21.4 7.7 5.4 12.7 T 0.0 0.0 65.7
1991-92 0.0 0.0 0.0 11.6 19.3 26.2 21.4 18.3 2.7 T 0.2 0.0 99.7
1992-93 0.0 0.0 3.0 13.0 9.1 12.1 13.7 18.3 5.7 0.0 0.0 0.0 74.9
1993-94 0.0 0.0 T 4.4 11.9 5.1 7.5 1.7 29.9 6.0 0.0 0.0 66.5
1994–95 0.0 0.0 0.0 9.1 38.8 29.0 12.6 15.3 16.7 0.0 0.0 0.0 121.5
1995–96 0.0 0.0 0.0 4.0 0.9 2.5 2.5 52.1 6.1 0.9 0.0 0.0 69.0
1996–97 0.0 0.0 0.1 28.1 25.7 4.7 3.1 5.1 0.8 0.2 0.0 0.0 67.8
1997-98 0.0 T 0.0 11.6 6.4 26.6 6.8 3.1 1.2 2.9 0.0
1998-99 0.0 T 0.0 0.4 9.1 34.5 8.3 6.6 17.4 3.0 T 0.0 79.3
1999-00 0.0 0.0 0.0 5.7 8.5 18.6 28.6 4.6 7.4 2.8 0.0 0.0 76.2
2000–01 0.0 0.0 T 2.1 3.2 4.2 11.0 19.7 15.9 1.3 6.1 0.0 63.5
2001– 0.0 0.0 0.0 20.6 6.6 7.9
POR=58 YRS 0.0 0.0 0.3 7.3 10.7 15.3 10.4 11.5 9.2 4.9 1.0 0.0 70.6



User Contributions:

Lavonn
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Jan 18, 2012 @ 9:21 pm
You've got to be kidding me-it's so transpratenly clear now!

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