ISENTROPIC ANALYSIS 167 
t AX 
\ 
@BILUNGS @FARGO hs } 
<< @ SAULT STE. MARIE (| 
_— 
hae 
a, BOSTON 
CHIGAGO! 
e@Dr 
@ SALT LAKE CITY 
OAKLAND. @ CHEYENNE NEW.VORK@E==e 
® omaAHA 24 PM 
LAKEHURST 
DAYTON® 25 AM @ WASHINGTON 
ST. LOUIS® 
29M ColeE 
NASHVILLE@ 
SAN DIEGO OKLAHOMA CiTy® A 
a) m2. am 
26 Pi 
-~@EL PASO BAB PM _SHREVEPORT 
MONTGOMERY® 
27AN 
PM PENSACOLA 
@SAN ANTONIO 
MIAMI 
Fic. 8. TRAJECTORY OF THE CENTER OF MAXIMUM THUNDERSTORM ACTIVITY 
is 
x 
' 
jz 
{2 
1g 
|S 
yw 
1 
Wu 
FOLLOWING THE INVASION OF A TONGUE OF Moist AIR ALOFT; AND POsI- 
TIONS OF AIRPLANE SOUNDING STATIONS USED IN THIS ANALYSIS (circles). 
(The black squares mark the successive positions of the center of thunder- 
storm activity for the twelve-hour periods preceding the dates entered 
beside them; these were fixed with the aid of thunderstorm reports and 
12-hourly amounts of precipitation.) 
ith 28th 
XN 53 (33) 
6.414, oN 
. 84(53) 
‘, Neot6-4) 
CU 
x 
A 
er a iN ot 
20) 6547.9) 
ie 0) G4, oon a) 41(53) 
18(1.6) \ 
ae Va oy ean 
b (4.0) 
ast7 12) 57 ROO 62 (9.9 
83 (78) & ba) ae \ 
aa Jae. Rn Wsti2.3) IN 
A Reto: 4 ) 519.6) 
47 iN 60 (113.2) 
eee \90(17. 2) ? (is 
37 K9.0) P 
6713.9} P44 = 84.07) 2: 805.0) 169 44) 
10 10 10 10 0 10 20 20 
TEMPERATURE - © 
Fic. 9. LApse-RATE DIAGRAMS OF SOUNDINGS DISCUSSED IN THIS REPORT. (The 
seales are such that a 45° line sloping upwards from right to left would 
represent the dry adiabat. Numbers to the right of these soundings are 
the relative and (in parentheses) specific humidities. Clouds are indi- 
cated by the International symbols of 1932. Arrows mark off dry-type 
moisture discontinuities.) 
