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

15

50"

1200

1150

1100

105"

50"

45'

45"

40"

3D"

OM

25"

25'

1150

1100

1050

1000
500 MILES
I

95'

90'

o
I

EXPLANATION

-582-

AREA WHERE OEWPOINTTEMPERATUREWAS WITHIN 6
DEGREES CELSIUS OF AIR TEMPERATURE

CONTOUR SHOWING ALTITUDE OF SOD-MILLIBAR
SURFACE. ~ 582=5820 meters. Co~tour inter~al 30
meters. Datum is mean sea level

~JO) 587
3 -~1

OBSERVATION STATION. -Upper left number is air
temperature. in degrees Celsius. Lower left number is
depression of dewpoint temperature below air
temperature, in degrees Celsius; X shown when
depression greater than 30 degrees Celsius, Upper right
number is altitude of 500-millibar surface, in meters;
581=5810 meters. lower right number is 12-hour
altitude change of SOD-millibar surface, in metors;
-01=-10 meters. Shah irldicates wind direction
Barbs on shah indicate wind speed, in knots. Long
barb=10 knots; short barb=5 knots_ M indicates
missing data

--18-

LINE OF EQUAL AIR TEMPERATURE. -Interval 1 degrees
Celsius

H

AXIS OF PRESSURE TROUGH

GEOGRAPHIC CENTER OF HIGHEST ALTITUDE OF
500-MIlLlBAR SURFACE

FIGURE 1O.-500-millibar analysis. 0600 MDT. July 31, 1976.