FLOOD04806

• County: Larimer
• Stream Name: Big Thompson/Cache la Poudre
• Basin: South Platte
• Title: Storm and Flood of July 31-August 1, 1976 in the Big Thompson River and Cache la Poudre River Basins
• Date: 1/1/1979
• Prepared For: Colroado Geological Survey
• Prepared By: USGS/NOAA
• Floodplain - Doc Type: Flood Documentation Report

METEOROLOGY. HYDROLOGY, BIG THOMPSON RIVER AND CACHE LA POUDRE RIVER BASINS

23

1150

1100

1050

1()()'

95'

40'

- '30.15
30.20~

~i030_24

30.20 I
I 14,,3016
30 15 ,,~
. I
30.10 1,,(
( \ \~0301O

,,- I~DJ017
'- \. 1"51
. 30.10

--.., 1 30.15
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"

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-66..../:m:21
53V

60

"03018
47,
)

400

62301;
"(O
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j, 30.15
)ii"') J/

-30.20.

90 . ___--c-c-

~

350

9~?3a07
'j

35'

30.10

9130.06
,,<>-'

8903007
./5,
60

30.00 ,""".,
-'_,\ -----s.
~-------\r-~'\r ..--...,.'

1100

1050

1000

o
1

100
1

200
1

300

400 MILES
1

EXPLANATION

60657015
om

.

.

AREA WHERE OEWPQINT TEMPERATURE EXCEED EO
60 DEGREES FAHRENHEIT

LINE OF EQUAL DEWPOINT TEMPERATURE. -Interval
5 degrees Fahrenheit

LINE OF EQUAL ALTIMETER smlNG, IN INCHES OF
MERCURY. -Interval 0.05 inch

COLD FRONT. -Dashed where dissipating

STATIONARY FRONT

saUAll LINE

L

GEOGRAPHIC CENTER OF LQW.PRESSURE SYSTEM

-70-

91103(1.01
57,
I
<

OBSERVATION STATION. -Upper left number is air
temperature, in degrees Fahrenheit. lower left
number is dewpoint temperature, in degrees
Fahrenheit. Number at right is altimeter setting, in
inches of mercury. Shat! indicates wind direction.
Barbs on shaft indicate wind speed. in knots. long
barb = 10 knots, short barb =- 5 knots.@=-calm winds,
less than 2 knots. Additional symbols and notes
exolained below;
i:=Thunderstorm with rain

-30.15-

.

-

H GEOGRAPHIC CENTER OF HIGH-PRESSURE SYSTEM

FIGURE IS.-Regional surface analysis. 1400 MDT, July 31, 1976.