Alert archive / Colorado / River Flood Advisories in 2011

River Flood Advisory 5, NWS Denver/Boulder, CO

June 24, 2011Grand County, Colorado

NWS Denver/Boulder, CO issued this river flood advisory at Jun 24, 2011, 3:04 PM MDT for Grand County, Colorado. It was in force for 5 days.

The area

The counties it named.

The facts

Issued
Jun 24, 2011, 3:04 PM MDT (21:04 UTC)
Expired
Jun 29, 2011, 11:00 AM MDT
In force
5 days
Issued by
NWS Denver/Boulder, CO

County Grand County, CO

The radar

The Denver radar (KFTG), 139 km from the middle of the area, began a volume at 21:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Williams Fork (CO) below Williams Fork Reservoir (WFRC2).

Action stage
6 ft
Minor stage
7 ft
Moderate stage
8.5 ft
Major stage
10 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 09038500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this river flood advisory went out at Jun 24, 10:52 AM MDT, 4 hours 12 minutes earlier.

Area forecast discussion, Jun 24, 10:52 AM MDT, 4 hours 12 minutes before
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Hazardous weather outlook, Jun 24, 11:02 AM MDT, 4 hours 2 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER CO
1102 AM MDT FRI JUN 24 2011

COZ030>051-251200-
JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND
COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000
FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST
GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/
SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND
BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST
DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK
COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER
COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON
COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS
COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/
EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES
ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD
COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS
COUNTY-
1102 AM MDT FRI JUN 24 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON ALONG THE FRONT
RANGE AND ADJACENT PLAINS. THESE STORMS WILL THEN SPREAD EASTWARD
ACROSS THE NORTHEAST PLAINS INTO THE EVENING HOURS...MORE NUMEROUS
ACROSS THE BORDER AREAS OF WYOMING AND NEBRASKA. THE AIRMASS IS
INITIALLY QUITE STABLE OVER THE FAR NORTHEAST PLAINS....SO THE
STRONGEST STORMS WILL LIKELY OCCUR THIS EVENING AND OVERNIGHT.

A FEW STORMS COULD BECOME SEVERE EAST OF A LINE FROM CHEYENNE TO
LIMON WITH HAIL TO THE SIZE OF QUARTERS AND DAMAGING WINDS. OVER THE
URBAN CORRIDOR...WIND GUSTS TO 50 MPH AND BRIEF HEAVY RAIN WILL BE
POSSIBLE WITH THE THUNDERSTORMS.

THE STRONGER STORMS WILL BE AIDED BY INCREASED MOISTURE LEVELS TODAY
ALONG WITH AN UPPER LEVEL DISTURBANCE APPROACHING COLORADO.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE WILL BE A CHANCE OF THUNDERSTORMS SATURDAY AFTERNOON AND
EVENING...MAINLY ACROSS THE EASTERN PLAINS. A FEW OF THE STORMS
COULD BECOME SEVERE OVER THE FAR NORTHEAST PLAINS WITH HAIL AND
STRONG WIND. MAINLY DRY CONDITIONS WILL PREVAIL SUNDAY THROUGH
THURSDAY WITH ONLY A SLIGHT CHANCE OF AFTERNOON AND EVENING
THUNDERSTORMS. TEMPERATURES AREA EXPECTED TO BE SLIGHTLY ABOVE
SEASONAL NORMALS THROUGH THE PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AFTER 4 PM...MAINLY FOR LOCATIONS
EAST OF THE FRONT RANGE URBAN CORRIDOR.

SWE/D-L

Nearby

River Flood Advisories in Colorado, 2011Every river flood advisory in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.