FLOOD08183

• County: Summit
• Community: Breckenridge
• Stream Name: Blue River
• Basin: Colorado Mainstem
• Title: Floodplain Information Breckenridge
• Date: 9/1/1974
• Prepared For: Summit County
• Prepared By: Leonard Rice Consulting Water Engineers, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

REPO::T 0;;-
(
~

( ~
lOC-Y-~.R EVEi:T PREGIPIT..TIOI:
~.

LOG:,TIOI:

I. GliT'wtolor;icol :Jssessrnont of synolJtic con::i,,;ions

~le results of an eiGht-year analysis of s~c~er syno?tic
conditions in t~e state of Colorado, with s,ecific attention
paie. to the Front R:J!1~e zone, is presented belo:: alone ,lith a
ten-yec.r analysis of winter syno;:,tic co nci tiODS :

I Synop-=---Ifo'orc e c.
itic IUJ-
iScale 131c":)e
IGonvec- (dlro-
Ition rtroTlic 1
I
I 16 I
. ,

% !~:-~---1'---o.~-~1~-- \qs.-~

Iso12,tec.
CoU'.rec-
Fion
I
I

~'!inter

3urL"ler

3SS'

tic

31.7

S"

~on-
ee-
ive
iJp-
plope

1301
:

,storm'

tner

l?ron

I S.~,/e

1/3

10.'

3S"

i
8"1 ! '''3
I
--.------.

/s.7

5".~

13. .J

3cS"

I'S'I 3~- . //7

.,--'-- ----,---...'-_.. '----
i

;
;
i ,oq,
!

61

65"

~-

I
I S,q

I
; 17.1

I
i l't. 1
i

s:,

3.2.

/0.7

J._

?I'o;') the above cn::;~.ysis it can be seen tllat a convective
eve:1t is !:Jost frcquellt (6().6.~) durine t.'le period of interest.
~:o :::10U .:f'rom vo!'iou.s inve.ctiG~.tions that t~1e cu:-;:ulonimbuc
clouL. s:'sten (8 l=::;e convoctive element) is an ef1'icient
Sy~tCl~ c07:';:,10 C;:: !'rod7c~nc large quanti ties of rain over rel-
at1~ely,s~ort t~~c perlOQs.

One roe;,' inve:;ti~~ate t~le nrecini tation records of r.1otmtain
st::n;ion~ such as Clirna;: II and ::ot Sulphur S'1rin5 tOfillC
Hide di:fi'erer:ce2. in t .0 DE.Ount of 8lll1usl preci~i tQtion received.
~~s iE. r:ost lil:c17 due to a rainshodol-l er.tect. This i3 a.
',henOMenon liue to D:1 o:'o::rn~hic barri er such DZ lj?en..111ile H:ln[e
re-ov1- on.... ~~.. -, ,.....,01. ~ttl~C ~"''''''0''1 ""'e ~; r on th^ '1.9; 'Y'd...""l""1c.- c-': de (C'l"-
" "L c,. .', - " -- " c.. -- - ..-.. ..-- -,. -
!'lax E) a:::i tht:c reciucins tlle preci:"itation on the lcolla,rd side
(Hot 3ub:'11l:' S:,rinc;). The ~per Rlue Hi ver EDcin is in such a
rcinshndOH, bei:1:~ circct:.y CDst of the Tennile Rnnee.

T~e facts ~re~cnte~ above lend one to the cJnclusion th~t
t:1C T!O~t li::017' S','IIO:,tic fOr!l13t:,on occurrint; durinr, tele su=er
r,10nt~s for [l lor-:'e:'r event iz a convoctive storm, n::1l'lelJ', a
cu8uloni:-:b....:.:::; C10l1Q s:,' ~'Gem.