what causes storm clouds to look gray

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what causes storm clouds to look gray	1.91	0.7	8276	16	37
what	0.13	0.8	5047	29	4
causes	1.81	0.8	1270	81	6
storm	1	0.5	7373	25	5
clouds	1.01	0.9	4433	39	6
to	1.37	0.1	5321	53	2
look	1.03	1	2211	44	4
gray	1.67	0.3	5392	25	4

Keyword	CPC	PCC	Volume	Score
what causes storm clouds to look gray	0.22	0.4	7200	95
what makes clouds grey	1.17	0.8	197	99
why do clouds turn gray	1.29	0.8	3628	30
why are some clouds grey	0.78	0.3	9669	4
why do clouds turn grey	0.11	0.8	2680	84
why are clouds grey when it rains	1.73	0.9	5746	80
dark gray storm clouds	1.94	0.2	6958	51
why are rain clouds grey	0.42	0.7	3019	33
what causes clouds to look green	0.99	0.3	7014	44
why are clouds white or gray	0.49	1	4244	53
why are storm clouds dark	0.27	1	9177	10
why are storm clouds green	0.96	0.8	215	50
white and grey on clouds	0.04	0.1	5730	29
why do thunderstorm clouds look dark	0.83	0.4	1925	80
what clouds form in dull gray layers	0.28	0.2	3594	87
why are storm clouds black	0.52	0.3	1602	28
how to describe grey clouds	0.9	0.1	7132	34
dark grey clouds background	1.86	0.1	3362	31
grey background with clouds	0.37	0.5	1499	59