Here are the talking points from the 10:30 AM conference call. Thank you
all for attending.
Spring Storm Talking Points
04/10/2019
10:30 AM
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Strong spring storm is moving into Colorado. Temperatures are a little
cooler than originally forecast, with some snow already mixed in with the
rain west of I-25. Rain will become widespread and heavier, and quickly
change to a heavy, wet, wind-driven snow. Blizzard conditions and whiteouts
expected East of I-25 and across Palmer Divide. Effects will continue
overnight Wednesday and into Thursday morning.
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Precipitation will start as rain in lower elevations (already mixed with
snow already west of I-25) with a fairly rapid changeover to all snow;
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1-2 PM Fort Collins/Boulder/Denver/Greeley
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1-2 PM Palmer Divide
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2-4 PM Northeast Plains
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Strong winds and snow will likely produce scattered power outages,
especially east of I-25
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Impacts: Afternoon/evening commute on Wednesday will be
hazardous/dangerous with heavy, wet, wind-driven snow.
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Remains dangerous over the eastern plains & Palmer Divide through
Thursday AM, should see improvement Denver to Fort Collins late tonight
through early Thursday morning.
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Significant impacts at DIA due to strong winds, low visibility, and
blowing snow.
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Scattered power outages
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Harsh transition for livestock - shelter if possible
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Road temperatures are starting out warm, some initial melting/slush
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Rapid cooling will result in icy roads for the late evening commute,
faster freeze-up where snow is blowing. Lows in the lower 20s
tonight with
icy/snow packed roads.
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Confidence
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HIGH for winds (40-55 mph gusts east of I-25, 25-40 mph west of I-25)
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HIGH for snow amounts in the mountains, foothills, Palmer Divide
stretching to the northeast plains east of Akron-Sterling line
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MODERATE for snow amounts I-25 corridor Wednesday afternoon into the
afternoon commute. Timing of changeover and exact storm track
are factors.
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Snowfall Amounts: Heavy at times
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Mountains & Foothills: 6-14 inches
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Urban Corridor and Eastern Plains: 4-10 inches, heaviest favoring
south metro Denver and Palmer Divide east/northeast toward Akron &
Julesburg.
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Amounts will vary - banded precipitation likely/heavy snow 2” per hour
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Heaviest snow time frames are 3 PM - 9 PM for the mountains & I-25
Corridor, 6 PM - 3 AM for the eastern CO Plains.
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Ending
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I-25 Urban Corridor Denver - Fort Collins, tapers off late Wednesday
night to Thursday AM
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Eastern Plains: Snow tapers off Thursday morning, but strong winds
and blowing snow through the day
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Mountains: Light snow through Thursday
On Tue, Apr 9, 2019 at 7:43 PM David Barjenbruch - NOAA Federal <
david.barjenbruch(a)noaa.gov> wrote:
Please join the National Weather Service Denver/Boulder on a
conference
call for the upcoming powerful spring (winter) storm.
*Location at risk:* All of Northeast and North Central Colorado
*DATE: *Wednesday, April 10, 2019
*TIME:* 10:30 AM MDT
*DIAL IN NUMBER:* 1-866-231-8384
*PASS CODE:* 3034944221#
The latest Situation Report on the storm is here:
https://www.weather.gov/media/bou/sitreport/SitReport1.pdf
NWS Boulder
--
David Barjenbruch
National Weather Service
Boulder, CO 80305
303-494-3210