Where does “Colorado low” come from?

Colorado low (English) comes from English low, from English allow, from Middle English allowen, from Old French alouer, from Latin allocō, from Latin ad-, from Latin īn-, from Latin în — in.

Colorado low (English): A fast moving high precipitation winter storm system originating out of Colorado, and traveling east across the United States, dumping much snow on the Great Plains and the Midwest

Definitions

A fast moving high precipitation winter storm system originating out of Colorado, and traveling east across the United States, dumping much snow on the Great Plains and the Midwest

Ancestry of “Colorado low”, step by step

Colorado low traces back through two separate lines of ancestry.

via English low

Step	Language	Word	Meaning
1	English	low	Situated close to, or even below, the ground or...
2	English	allow	To grant, give, admit, accord, afford, or yield;...
3	Middle English	allowen	—
4	Old French	alouer	Alternative form of aloer
5	Latin	allocō	to hire
6	Latin	ad-	to; usually prefixed to verbs, in which cases it...
7	Latin	īn-	un-, non-, not
8	Latin	în	in, at, on, upon, from (space)
9	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
10	Proto-Italic	en	in
11	Proto-Indo-European	h₁én	in

via English Colorado

Step	Language	Word	Meaning
1	English	Colorado	Places in North America
2	Spanish	Colorado	colored
3	Latin	coloratus	coloured
4	Latin	coloro	I color, tinge, imbue; I paint, dye
5	Latin	color	colour, shade; color; pigment; complexion
6	Ancient Greek	μέτρον	something used to measure: measure, rule, weight;...
7	Ancient Greek	-τρον	Forms instrument nouns
8	Proto-Hellenic	-tron	Forms instrument nouns from verb stems
9	Proto-Indo-European	-trom	Forms nouns denoting a tool or instrument
10	Proto-Indo-European	-tḗr	Derives agent nouns from verbs, denoting someone...

Every word from Proto-Indo-European h₁én →