Weather Alert in Colorado
Hydrologic Outlook issued May 8 at 1:46PM MDT by NWS Grand Junction CO
AREAS AFFECTED: Archuleta, CO; Delta, CO; Dolores, CO; Eagle, CO; Garfield, CO; Gunnison, CO; Hinsdale, CO; La Plata, CO; Montezuma, CO; Montrose, CO; Ouray, CO; Pitkin, CO; San Juan, CO; San Miguel, CO
DESCRIPTION: ESFGJT Risk of areal flooding and elevated stream flows from rapid snowmelt ...EXISTING CONDITIONS... Recent storms have brought several inches of new snow to mid to high elevations (8500' to 10,000') over the San Juans mountains, nosing along the Divide across Central Colorado. With forecast temperatures running 5 to 15 degrees above normal and the potential for showers and storms along the Divide each afternoon through the weekend, this region of western Colorado is vulnerable to enhanced runoff and elevated stream flows from rapid snowmelt. ...PRECIPITATION... Isolated to scattered showers and storms developing each afternoon favor high terrain across the southwest San Juans and along the spine of the Divide. Due to warming conditions, precipitation in the form of rain is possible as high as 10,000'. Although anticipated storm totals are low, generally 0.1" to 0.2", rain on snow could enhance the rate of snowmelt. ...STREAMFLOW CONDITIONS AND RUNOFF FORECASTS... Streams and rivers in the area will see elevated flows of dangerously cold water over the next several days. Low-lying areas across mountainous terrain (8500' to 10,000') are most susceptible to swelling of area streams and/or localized inundation. Stay away from fast moving water and exercise caution near riverbanks and streams. Updated weather and water products and forecasts are available from the NWS Grand Junction's website at: Www.weather.gov/gjt
INSTRUCTION: N/A
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Weather Topic: What is Hail?
Home - Education - Precipitation - Hail
Next Topic: Hole Punch Clouds
Hail is a form of precipitation which is recognized by large solid balls or
clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind.
As the hailstones remain in the updraft, ice is deposited onto them until their
weight becomes heavy enough for them to fall to the earth's surface.
Hail storms can cause significant damage to crops, aircrafts, and man-made structures,
despite the fact that the duration is usually less than ten minutes.
Next Topic: Hole Punch Clouds
Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
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