Page 3 - Combined_40_OCR

METEOROLOGICAL DATA FOR THE CURRENT YEAR

Station: HUNTSVILLE/ ALABAMA HUNTSVILLE-MADISON COUNTY AP Standard time used: CENTRAL Latitude: Longitude: Elevation (ground) :

Temperature Degree days Precipitation Relative humidity Number of days
Temperatures
(Base 65°)
Extremes Snow, Ice pellets Resultant Fastest mile Sunrise to sunset

(Local time)

NORMALS, MEANS, AND EXTREMES

Relative Wind &
Temperature Precipitation humidity Mean number of days
Normal heating degree EC EC jn0H | Pct. of possible sunshine | sunrise to sunset 1Snow, Ice pellets ** Average daily solar radiation - langleys
Temperatures
to
Normal Extremes Snow, Ice pellets o 1 Fastest mile Sunrise Max. Min.
sunset
Mean speed
x: maximum minimum highest days (Base 65°) Normal total Maximum monthly Minimum monthly Maximum in 24 hrs. Mean total Maximum monthly Maximum in 24 hrs. 00 06 12 “ 1Prevailing | direction | Direction 1Mean sky cover o Precipitation | .01 inch or more 11.0 inch or more 1Thunderstorms | Heavy fog 90°and co o •o S
s
§ 5
o Daily Daily Monthly Record Year’ Record lowest Year Year Year Year Year Year (1-oca tim CO g. Year J Clear 1Partly | cloudy O 1above oi *2 cm a; o
CO
Z | co 1
(a) (b) (b) (b) 6 6 (b) (b) 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
J 50.5 31.3 40.9 76 1972 3 1970 747 5.13 7.97 1972 1.71 1970 2.95 1969 1.4 4.3 1968 2.4 1970 + 79 83 66 70 9.3 32 21 1973 7.0 7 5 19 12 1 2 3 0 3 19 0
F 54.0 33.2 43.6 75 1972 7 1970 605 5.16 9.57 1971 1.14 1968 3.86 1971 1.1 2.7 1968 1.8 1968 75 81 58 60 9.5 39 28 1971 6.6 7 6 15 9 1 2 1 0 1 17 0
M 61.7 39.8 50.8 82 1968 19 1969 461 5.79 14.77 1973 3.00 1969 7.70 1973 0.4 2.1 1968 2.1 1968 75 82 57 58 9.9 46 12 1969 6.5 7 9 15 12 * 5 1 0 0 8 0
A 73.1 50.2 61.7 90 1971 30 1973 145 4,79 9.08 1970 3.29 1971 2.62 1970 T T 1973+ T 1973 + 76 82 54 55 9.1 44 18 1970 5.9 10 6 14 10 0 5 1 F. 0 1 0
M 80.9 58.3 69.6 92 1970 36 1971 32 3.86 6.85 1969 3.06 1970 4.25 1969 0.0 0.0 0.0 82 86 56 58 7.9 32 27 1972 5.5 11 9 11 10 0 6 1 1 0 0 0
J 87.9 65.9 76.9 101 1969 45 1972 0 3,97 6.61 1970 0.77 1968 4.46 1969 0.0 0.0 0,0 85 87 56 61 6.8 35 34 1970 + 5.4 9 12 9 9 0 9 1 9 0 0 0
J 90.2 68.8 79.5 101 1969 54 1972 0 4,88 9.44 1973 2.44 1970 2.19 1971 0.0 0.0 0.0 87 39 61 66 6.0 43 27 1969 6.1 7 13 11 12 0 11 2 16 0 0 0
A 90.2 67.7 79.0 101 1968 57 1972 0 3,46 4.04 1970 0.93 1973 1.95 1970 0.0 0.0 0.0 86 89 58 66 5.7 31 31 1968 5.0 11 12 8 8 0 8 2 11 0 0 0
S 84.2 61.6 72.9 95 1970 43 1972 11 3,29 5.99 1971 1.78 1973 2.31 1971 0.0 0.0 0.0 87 90 60 69 6.4 43 23 1968 5.6 9 10 11 8 0 5 3 5 0 0 0
□ 74.5 49.8 62.2 89 1968 30 1968 159 2.57 4.76 1970 0.77 1971 1.67 1973 0.0 0.0 0.0 84 87 59 70 7.5 32 33 1972 5.4 11 8 12 7 0 3 3 0 0 * 0
N 61.6 38.9 50.3 80 1971 + 15 1970 441 3,88 6.79 1973 1.82 1971 3.33 1973 T 0.1 1969 0.1 1969 82 86 60 67 8.5 35 31 1969 6.0 9 7 14 9 0 2 2 0 ♦ 9 0
D 52.1 32.7 42.4 77 1970 14 1968 701 5,38 9.89 1971 4.73 1970 5.81 1973 0.2 1.0 1970 1.0 1970 79 83 65 71 9.5 38 26 1968 6.9 7 5 19 12 * 2 1 0 ♦ 14 0
JUL. JAN. MAR. OCT. MAR. JAN. JAN. MAR.
YR 71.7 49.9 60.8 101 1969 + 3 1970 3302 52,16 14.77 1973 0.77 1971 + 7.70 1973 3.1 4.3 1968 2.4 1970 + 81 85 59 64 8.0 46 12 1969 6.0 105 102 158 118 1 57 20 43 5 67 0

Means and extremes above are from existing and comparable exposures. Annual extremes have been exceeded at other sites in the locality as follows:
Highest temperature 104 in July 1966; lowest temperature -11 in January 1966; minimum monthly precipitation T in October 1963; maximum monthly
snowfall 21.4 in December 1963; maximum snowfall in 24 hours 17.1 in December 1963; fastest observed 1-minute wind speed 63 in July 1963.

(a) Length of record, years, based on January data. Unless otherwise indicated, dimensional units used in this bulletin are: temperature in degrees F.; & Figures instead of letters in a direction column indicate direction in tens of degrees from true North;
Other months may be for more or fewer years if precipitation, including snowfall, in inches; wind movement in miles per hour; and relative humidity i.e., 09-East, 18-South, 27-West, 36-North, and 00-Calm. Resultant wind is the vector sum of
there have been breaks in the record. in percent. Heating degree day totals are the sums of negative departures of average daily tempera­ wind directions and speeds divided by the number of observations. If figures appear in the direction
(b) Climatological normals (1941-1970) . tures from 65° F. Cooling degree day totals are the sums of positive departures of average daily column under "Fastest mile" the corresponding speeds are fastest observed 1-minute values.
* Less than one half. temperatures from 65° F. Sleet was included in snowfall totals beginning with July 1948. The term
+ Also on earlier dates, months, or years. "Ice pellets" includes solid grains of ice (sleet) and particles consisting of snow pellets encased
T Trace, an amount too small to measure. in a thin layer of ice. Heavy fog reduces visibility to 1/4 mile or less.
— Below zero temperatures are preceded by a minus sign,
t > 70° at Alaskan stations. Sky cover is expressed in a range of 0 for no clouds or obscuring phenomena to 10 for complete sky
cover. The number of clear days is based on average cloudiness 0-3, partly cloudy days 4-7, and
The prevailing direction for wind in the Normals, cloudy days 8-10 tenths.
Means, and Extremes table is from records through
1963. Solar radiation data are the averages of direct and diffuse radiation on a horizontal surface. The langley
denotes one gram calorie per square centimeter.