A PROCEDURE OF SHORT-RANGE WEATHER FORECASTING 781 
1000-500 MB MAP : 1000=500 MB MAP 
0500 I7 JULY1944| ; 1700 {@ JULY 1944 
A 
1000-500 MB MAP ~~ Composite map 
0500 19 JULY 1944 Som 560° 0800 18 JULY 1944 
LEGEND 
D.D=WIND SPEED(knot 500 MB MAP 
WIND DIRECTION 0500 18 JULY 1944 
VERTICAL GROSS-SECTION O500 18 JULY 1944 
8 
KM 
10710 Gi 6/10 Ci 4 
7KM Wl, 
6KM g 
6/10 Ac 
SKM 10/10 Ni 10/710 As 
ical ue = 
8/10 AsAc SJQ/10 Ac atl = 
pon a | 
ik = vos mu oene sttitttersece eae ae = Ls 
eG RE cae 
A B 
KOVNO 
(i) 
Fie. 6.—The thermal low. Units are geopotential decameters on the upper-level charts and millibars on the composite map. 
