GROUND WATER IN NORTH-CENTRAL TENNESSEE
GROUND WATER IN NORTH-CENTRAL TENNESSEE
GROUND WATER IN NORTH-CENTRAL TENNESSEE
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J? §1<br />
?<br />
20<br />
158<br />
2<br />
20<br />
15<br />
GEOGRAPHY 9<br />
Extreme monthly and annual temperature at four stations in north-central<br />
Tennessee<br />
[From publications of 17. S. Weather Bureau]<br />
Absolute maximum<br />
o s<br />
s-b<br />
38<br />
44<br />
34<br />
57<br />
**ft<br />
44<br />
34<br />
fi7<br />
Station January<br />
75<br />
74<br />
78<br />
78<br />
f^larlmtrillfl -13<br />
-10<br />
-13<br />
in<br />
February<br />
82<br />
76<br />
81<br />
7ft<br />
1 88<br />
86<br />
90<br />
Sfl<br />
&<br />
94<br />
91<br />
94<br />
90<br />
a<br />
98<br />
94<br />
100<br />
96<br />
Absolute minimum<br />
-14<br />
-16<br />
-73<br />
,n<br />
4<br />
4<br />
In the 12 counties covered by this report the average frost-free<br />
period or growing season ranges from 189 days at Dover to 210 days at<br />
Nashville. The shortest recorded frost-free period within the region<br />
is 158 days and the longest 261 days. These relations are por<br />
trayed by the following table:<br />
No.<br />
on<br />
Fig-<br />
urel<br />
3<br />
2<br />
16<br />
1<br />
20<br />
19<br />
15<br />
11<br />
8<br />
Length<br />
of rec<br />
ord<br />
(years)<br />
24<br />
36<br />
27<br />
29<br />
36<br />
36<br />
32<br />
19<br />
57<br />
1<br />
107<br />
100<br />
105<br />
100<br />
3 Hs<br />
108<br />
10?,<br />
107<br />
102<br />
| 108<br />
104<br />
106<br />
104<br />
1<br />
a<br />
£<br />
11?<br />
107<br />
108<br />
104<br />
Frost data for nine stations in north-central Tennessee<br />
[From publications of IT. S. Weather Bureau]<br />
Station<br />
Cedar Hill ___ . .....<br />
Clarksville. ____ .<br />
Florence ..............<br />
74<br />
20<br />
fff,<br />
OR<br />
Date of last killing<br />
frost in spring<br />
Latest<br />
recorded<br />
Apr. 26<br />
May 1<br />
May 2<br />
May 2<br />
Apr. 26<br />
Apr. 27<br />
May 2<br />
Apr. 26<br />
Apr. 24<br />
Average<br />
Apr. 12<br />
Apr. 4<br />
Apr. 12<br />
Apr. 13<br />
Apr. 7<br />
Apr. 6<br />
Apr. 8<br />
Apr. 8<br />
Mar. 31<br />
on<br />
33<br />
31<br />
36<br />
43<br />
4?<br />
41<br />
>IO<br />
51<br />
47<br />
48<br />
53<br />
47<br />
4Q<br />
48<br />
51<br />
Date of first killing<br />
frost in autumn<br />
Average<br />
Oct. 24<br />
Oct. 24<br />
Oct. 21<br />
Oct. 20<br />
Oct. 23<br />
Oct. 25<br />
Oct. 22<br />
Oct. 23<br />
Oct. 30<br />
Earliest<br />
recorded<br />
Oct. 9<br />
Oct. 1<br />
Oct. 2<br />
Sept. 27<br />
Oct. 1<br />
Oct. 1<br />
Sept. 22<br />
Oct. 9<br />
Oct. 8<br />
35<br />
35<br />
30<br />
38<br />
October<br />
93<br />
93<br />
94<br />
92<br />
?A<br />
74<br />
21<br />
26<br />
November<br />
8S<br />
A1<br />
88<br />
81<br />
7<br />
9<br />
R<br />
10<br />
December<br />
78<br />
77<br />
73<br />
75<br />
-12<br />
- 5<br />
-19<br />
_ 0<br />
Length of frost-free<br />
period (days)<br />
Maxi<br />
mum<br />
record<br />
ed<br />
215<br />
246<br />
217<br />
212<br />
230<br />
249<br />
227<br />
245<br />
261<br />
Aver<br />
age<br />
19fi<br />
202<br />
191<br />
189<br />
200<br />
202<br />
196<br />
198<br />
210<br />
!<br />
11?<br />
107<br />
108<br />
104<br />
-14<br />
21<br />
1*<br />
Mini<br />
mum<br />
record<br />
ed<br />
Farther east, on the elevated Cumberland Plateau, the frost-free<br />
period is somewhat shorter, the average being 170 days at Erasmus,<br />
Cumberland County. At several stations on the Cumberland Plateau,<br />
however, the average frost-free period is just as long as in the lower<br />
country farther west.<br />
RA<strong>IN</strong>FALL<br />
The average annual rainfall in central Tennessee ranges between 48<br />
and 56 inches. It is least in the Nashville Basin and on the lowest part<br />
of the Highland Rim plateau, in Stewart and Montgomery Counties<br />
and increases irregularly toward the south and east. This normal<br />
variation of rainfall is brought out by the accompanying sketch map<br />
(fig. 3) and by the table of average rainfall at 45 climatologic stations.<br />
100144r-32 2<br />
171<br />
171<br />
163<br />
164<br />
174<br />
180<br />
158<br />
177<br />
175
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