Posted on May 1, 2023
SSgt Forensic Meteorological Consultant
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Rain and Snow in the Northeast; Heavy Wet Snow Near
Lake Superior; Critical Fire Weather in Arizona

KEKO (Elko Rgnl, NV, US)
CLEAR 10SM
Temperature: 8.3°C ( 47°F)
Dewpoint: -1.7°C ( 29°F) [RH = 49%]
Pressure (altimeter): 29.70 inches Hg
WINDS: EAST 7MPH

-------------------------------
KHND (Henderson/Executive, NV, US)
CLR 10SM
Temperature: 20.6°C ( 69°F)
Dewpoint: -6.1°C ( 21°F) [RH = 16%]
Pressure (altimeter): 29.68 inches Hg
WINDS: SOUTH 13MPH

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KLAS (Las Vegas/Reid Intl, NV, US)
FEW180 SCT250 / 10SM
Temperature: 22.2°C ( 72°F)
Dewpoint: -7.2°C ( 19°F) [RH = 13%]
Pressure (altimeter): 29.64 inches Hg
WINDS: SOUTH 9MPH

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KLSV (Nellis AFB, NV, US)
CLR 10SM
Temperature: 21.8°C ( 71°F)
Dewpoint: -6.0°C ( 21°F) [RH = 15%]
Pressure (altimeter): 29.60 inches Hg
WINDS: SSW 7MPH

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KP68 (Eureka Arpt, NV, US)
Temperature: 10.6°C ( 51°F)
Dewpoint: -5.6°C ( 22°F) [RH = 32%]
Pressure (altimeter): 29.74 inches Hg
WINDS: SE 14MPH

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KRNO (Reno/Tahoe Intl, NV, US)
FEW060 BKN200/ 10SM
Temperature: 12.8°C ( 55°F)
Dewpoint: 2.2°C ( 36°F) [RH = 48%]
Pressure (altimeter): 29.69 inches Hg
WINDS: CALM

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KVGT (Las Vegas/North Arpt, NV, US)
Temperature: 22.8°C ( 73°F)
Dewpoint: -5.6°C ( 22°F) [RH = 15%]
Pressure (altimeter): 29.63 inches Hg
WINDS: SOUTH 12MPH

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KWMC (Winnemucca Muni, NV, US)
CLR 10SM
Temperature: 2.8°C ( 37°F)
Dewpoint: -3.9°C ( 25°F) [RH = 61%]
Pressure (altimeter): 29.67 inches Hg
WINDS: CALM

----------------------------------

Clear 36°F/ 2°C
Current conditions at Eureka Airport ASOS (KP68)
Humidity 74%
Wind Speed N 0 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 01 May 06:20 AM MDT

Today
Mostly sunny, with a high near 75. Southeast
wind 10 to 18 mph, with gusts as high as 26 mph.

Tonight
Mostly clear, with a low around 44. Southeast wind
10 to 18 mph, with gusts as high as 24 mph.

Tuesday
A 20 percent chance of showers and thunderstorms
after noon. Some of the storms could produce heavy rain.
Mostly sunny, with a high near 76. South southeast wind
10 to 18 mph, with gusts as high as 22 mph.

Tuesday Night
Mostly cloudy, with a low around 41.
South wind 6 to 14 mph becoming
east in the evening.

Wednesday
Mostly sunny, with a high near 73.
East wind 8 to 14 mph becoming
south southwest in the afternoon.

Wednesday Night
Partly cloudy, with a low around 40.

Thursday
A 50 percent chance of showers and thunderstorms
after noon. Partly sunny, with a high near 69.

Thursday Night
Showers likely. Mostly cloudy, with a low around 38.
Chance of precipitation is 70%.

Friday
Showers likely. Snow level 8300 feet lowering
to 7600 feet in the afternoon . Mostly cloudy,
with a high near 55. Chance of precipitation is 70%.

Friday Night
A 30 percent chance of showers. Snow level 7800 feet.
Mostly cloudy, with a low around 36.

Saturday
Showers likely and possibly a thunderstorm.
Snow level 7600 feet. Mostly cloudy, with a
high near 57. Chance of precipitation is 60%.
Lat: 39.60139°NLon: 116.00556°WElev: 5945ft.
Saturday Night
A 30 percent chance of showers. Snow level 7900 feet. Mostly cloudy, with a low around 36.

Sunday
A 50 percent chance of showers and thunderstorms.
Snow level 7500 feet rising to 8200 feet in the afternoon.
Partly sunny, with a high near 57.

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Flood Watch
National Weather Service Pocatello ID
151 PM MDT Sun Apr 30 2023

.Warm temperatures may melt snow
pack and increase river flows.

Southern Hills/Albion Mountains-Raft River Region-Marsh
and Arbon Highlands-Franklin/Eastern Oneida Region-Bear
Lake Valley-Blackfoot Mountains-Caribou Range-Big Hole
Mountains-Teton Valley-Centennial Mountains - Island
Park-Beaverhead - Lemhi Highlands-Lost River Valley-
Sawtooth/Stanley Basin-Wood River Foothills- Including
the cities of Thatcher, Malta, Stanley, Henry, Preston,
Soda Springs, Driggs, Arco, Howe, Ashton, Swan Valley,
Hailey, Albion, Bone, Chilly, Victor, Inkom, Almo,
Montpelier, Spencer, Dubois, Downey, Edie School,
Small, Malad, Kilgore, Tetonia, Lava Hot Springs,
Holbrook, Island Park, Georgetown, Picabo,
McCammon, Mackay, Grace, St. Charles, Rockland,
Bellevue, and Wayan
151 PM MDT Sun Apr 30 2023
...FLOOD WATCH FOR SNOWMELT REMAINS IN EFFECT THROUGH
TUESDAY

AFTERNOON...

* WHAT...Flooding caused by snowmelt continues to be possible.

* WHERE...Portions of central Idaho, eastern Idaho and southeast
Idaho, including the following areas, in central Idaho, Lost River
Valley, Sawtooth/Stanley Basin and Wood River Foothills. In
eastern Idaho, Beaverhead - Lemhi Highlands, Big Hole Mountains,
Centennial Mountains - Island Park and Teton Valley. In southeast
Idaho, Bear Lake Valley, Blackfoot Mountains, Caribou Range,
Franklin/Eastern Oneida Region, Marsh and Arbon Highlands, Raft
River Region and Southern Hills/Albion Mountains.

* WHEN...Through Tuesday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
- Very warm temperatures into mid-week will continue to rapidly
melt existing snow pack. Flooding risk remains high.
Precipitation chances increase towards the end of the week,
which may add to flooding concerns.
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

---------------------------------------
Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
328 AM EDT Mon May 01 2023

Valid 12Z Mon May 01 2023 - 12Z Wed May 03 2023

...Heavy rain to continue across northern Maine through Monday, as areas
further south begin to clear out...

...Heavy snow will persist across Upper Peninsula of Michigan through
early work week; Well-below-average temperatures across Great Lakes and
Ohio Valley through Tuesday, spreading into Northeast and Mid-Atlantic on
Wednesday...

...Cool and unsettled weather spreads into the West Coast, while well
above average temperatures continue across the Intermountain West,
northern/central Rockies, and northern High Plains...

After widespread heavy rainfall across the Mid-Atlantic and
Northeast this weekend, with localized areas receiving as
much as 3-5" of rain over the past 48 hours, conditions are
expected to slowly improve from south to north as the
heaviest axis of precipitation progresses northward into
northern New England during the Monday morning hours.

Additional rainfall amounts of 1"+ will be confined to
northern Maine, with some localized higher elevations
forecast to see upwards of 2" over the next 24 hours.

Although much of the precipitation will have ended by
late Monday, conditions will remain cool and damp,
with scattered showers possible through Wednesday.

Meanwhile, a highly anomalous upper-low, which has
been partly responsible for heavy rainfall in the
Northeast, remains nearly stationary over the
Great Lakes and will continue to lead to much
below-average temperatures and localized
heavy snowfall across northern Wisconsin
and the Upper Peninsula (U.P.) of Michigan through
Tuesday.

Shortwave energy traveling around the base of the
upper low will lead to a continued rapid deepening
of a surface low over Lake Superior and the
Ontario Province late through Monday, with
several locations potentially approaching
May monthly low-pressure records.

The ongoing snowfall in the northern Great Lakes
region will persist through Tuesday as gusty, northwesterly
winds on the backside of the strengthening surface low,
in conjunction with cold air advecting southward and
orographic lifting, will lead to localized additional totals of
1-2 feet across higher elevations of the interior U.P. of Michigan.

Given the late-season event, surface temperatures hovering
around freezing will lead to a very heavy, wet snow, which
may result in downed trees and powerlines.

The snow will diminish on Tuesday as the system weakens and
slowly pushes eastward as high pressure builds in.
Portions of the West Virginia Appalachians may also experience
accumulating snow through Wednesday, with localized

Winter Storm Warnings in effect. Furthermore, a
broader area of much-below-average temperatures
(10-20 degrees F below average), encompassing
much of the Midwest, Great Lakes region, and
Ohio Valley, will be possible through Tuesday,
as daytime highs remain in the low 40s and
numerous locations approach or break daily record l
ow maximum temperatures.

As the upper low begins to push northeastward, the
below-average temperatures will spill into the Mid-Atlantic
and Northeast, with nighttime lows dipping into the low 40s
across nearly the entirety of the I-95 urban corridor.

For the Western U.S., a cool and unsettled weather pattern
is currently spreading into the West Coast as an upper-level
low is forecast to slide into the region early this week.
This will lead to showers and high-elevation snow chances,
along with below-average temperatures.

Further inland, gusty southerly winds and well
above average temperatures are anticipated for
much of the Intermountain West, with warm weather
also spreading into the northern and central Rockies
and northern High Plains.

Regions experiencing river flooding due to snow melt
across the Great Basin can expect more significant
snowmelt this week.

Additionally, scattered shower and thunderstorm chances
will overspread much of the Rockies by Tuesday as well.
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Responses: 2
Lt Col John (Jack) Christensen
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Heavy snow, reminds me of when I got caught in a blizzard when PCS'ing to Plattsburgh AFB in April.
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Maj Kim Patterson
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SSgt (Join to see) thanks for the weather brief.
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