Very strong southwest winds occurred out ahead of a strong cold front and low pressure trough that moved through eastern Utah and western Colorado, bringing colder air with moderate snowfall across the mountains of western Colorado. The heaviest snow fell over the Elkhead Mountains and Park Mountains in Northwest Colorado.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GJT wrote it up.
Very strong southwest winds occurred out ahead of a strong cold front and low pressure trough that moved through eastern Utah and western Colorado, bringing colder air with moderate snowfall across the mountains of western Colorado. The heaviest snow fell over the Elkhead Mountains and Park Mountains in Northwest Colorado. Winds remained strong enough to keep blowing snow impacts across the higher elevations. Milder temperatures limited snow accumulations in the valleys.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Junction, CO wrote its last area forecast discussion before the first event at Apr 5, 3:29 PM MST, 31 minutes earlier. Its key messages:
Area Forecast Discussion
National Weather Service Grand Junction CO
429 PM MDT Fri Apr 5 2024
.KEY MESSAGES...
- High Wind Warnings/Wind Advisories remain in effect through
mid evening as very strong, gusty winds are expected to
continue across the region. 50 to 65 mph gusts have been
widely reported across the valleys of eastern Utah and much of
western Colorado with higher gusts in the mountains.
- Blowing Dust Warning in effect through 8 PM for southeast Utah
as strong winds lift dirt from Arizona and carry it northward
ahead of an approaching cold front.
- Winter Weather Advisories have been issued for the western
Colorado mountains which go into effect tonight through
Saturday night for the Colorado mountain zones, where 6-12
inches of new snow will fall, including higher amounts on
favored peaks.
&&
.SHORT TERM /THROUGH SATURDAY NIGHT/...
Issued at 429 PM MDT Fri Apr 5 2024
Strong winds continued across the forecast area this afternoon
ahead of the cold front oriented north-south along a line
stretching from southwest Wyoming to just east of KPUC and KHVE
into eastern Arizona. Winds ahead of the front have largely been
between 45 and 65 mph in the valleys and up to 90 mph in the
higher terrain. Meanwhile, virga from moisture aloft over a
deep dry layer in the lower levels of the atmosphere appeared to
be driving some of the higher observed wind gusts.
Per previous discussions, the 140+ knot jet moving through the
base of the storm currently centered over the Great Basin will
move eastward tonight. This will draw the storm's trough axis
eastward across the area while giving it a negative tilt when
its base moves over the forecast area during the early morning
hours. In turn, this will drive the cold front across eastern
Utah and far western Colorado this evening, then to the
Continental Divide by sunrise Saturday morning. Strong upward
forcing was depicted in model data during this period with
convergence at the surface, strong mid-level forcing at mid-
levels according to Q derived omega, and divergence in the
upper atmosphere in the left exit region of the jet. As a
result, showers will become widespread with rain showers in the
lower valleys changing over the snow with frontal passage this
evening. In the mountains, snow will begin to accumulate while
cooling temperatures lead to icy and snowpacked roads. Let's not
forget those winds, which will be decreasing behind the front,
but will remain strong enough to generate areas of blowing snow
resulting in reduced visibility for drivers. That said, the
intensity of the gusts are expected to drop below
warning/advisory levels this evening. Temperatures will be
chillier than they have been in some time by Saturday morning
as cold air fills in behind the front.
Expect snow to continue on Saturday, especially over the
western Colorado mountains as residual moisture in west to
northwest flow feeds orographic showers in the conditionally
unstable environment. This activity will slowly decrease as the
storm's center moves to northeast Colorado and the moisture
influx wanes. Wrap-around moisture will continue to impact the
northern and central Colorado mountains Saturday night as the
storm moves slowly off to the northeast toward the Upper
Midwest. Snow accumulations appeared to be on track with the
Colorado mountain ranges expected to receive roughly 6 to 12
inches of new snow with this storm. Winter Weather Advisories
appeared to be on track so only adjustment made was to add the
upper levels of the Grand Mesa to these highlights.
Prepare for significantly colder temperatures on Saturday with
readings expected to be 15 to 20 degrees colder than today's
highs. Finally, clearing and drying over the western portion of
the forecast area on Saturday night will lead to frigid morning
lows on Sunday. Budding trees appeared to be ahead of schedule
in the Grand Valley due to the mild late winter/early spring
period. Therefore, there are some concerns that freezing
temperatures may have an impact on local vegetation and fruit
trees in particular on Sunday morning as morning lows are
expected to dip into the upper 20s. Consequently, a Freeze Watch
has been issued for the early morning period Sunday in the
Grand Valley.
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
Issued at 429 PM MDT Fri Apr 5 2024
Incredibly blocky pattern remains in place on Sunday. The
upstream Omega pattern will force the next batch of upstream
energy to dive southward out of the Northern Rockies on Sunday.
This low will track through the Great Basin Sunday afternoon
through Monday afternoon...arriving to the southern AZ/NM border
with Mexico on Tuesday before heading East. This passing system
to our West then South will keep a threat of showery
precipitation in the forecast through Tuesday afternoon. With
the moisture swept away with today's cold front...QPF amounts
through these next several days are light and impacts should be
minimal with any mountain snow that falls. Increasing heights
will be building in from the West on Wednesday with another weak
WAA precipitation event possible along the Colorado high divide
mountains. This ridge will then return dry and warmer weather
through the end of the week. Temperatures Sunday into Monday
linger below normal...hover near normal Tuesday through
Wednesday and then pop up above normal to end out the week. For
those wondering with this system dropping through Monday skies
could be mostly cloudy across much of the area for viewing the
partial eclipse.
&&
.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1148 AM MDT Fri Apr 5 2024
Wind event has moved in on queue with frequent gusts in the 35
to 55 mph range already this morning. Visibility impacts are
less frequent but blowing dust in part of SW Colorado and SE
Utah may drop to MVFR levels for short periods of time. The
storm driving the winds will arrive through the evening. The
blowing dust could be replaced by blowing snow in the mountain
TAF sites with mainly sprinkles reaching the lowest elevations.
Winds should ease a bit behind the front but gusts over 25 mph
are possible again tomorrow afternoon under a much cooler
regime. Mountain wave turbulence and LLWS will persist through
the evening as well.
&&
.GJT WATCHES/WARNINGS/ADVISORIES...
CO...High Wind Warning until 8 PM MDT this evening for COZ001-020-
021.
Wind Advisory until 9 PM MDT this evening for COZ002-003-006-
007-009-011-017>019-022-023.
Winter Weather Advisory from midnight tonight to noon MDT
Sunday for COZ004.
Freeze Watch from late Saturday night through Sunday morning
for COZ006.
Winter Weather Advisory from 6 PM this evening to midnight MDT
Saturday night for COZ009-010-012.
Winter Weather Advisory from 6 PM this evening to 6 AM MDT
Sunday for COZ013.
Winter Weather Advisory from 6 PM this evening to 6 PM MDT
Saturday for COZ018-019.
UT...High Wind Warning until 8 PM MDT this evening for UTZ022>025-
027>029.
Blowing Dust Warning until 8 PM MDT this evening for UTZ022.
&&
SHORT TERM...NL
LONG TERM...15
AVIATION...15Hazardous Weather Outlook National Weather Service Grand Junction CO 505 AM MDT Fri Apr 5 2024 COZ001>014-017>023-UTZ022>025-027>029-061115- Lower Yampa River Basin-Central Yampa River Basin- Roan and Tavaputs Plateaus-Elkhead and Park Mountains- Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor- Central Colorado River Basin-Grand and Battlement Mesas- Gore and Elk Mountains/Central Mountain Valleys- Central Gunnison and Uncompahgre River Basin- West Elk and Sawatch Mountains-Flat Tops- Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide- Northwest San Juan Mountains-Southwest San Juan Mountains- Paradox Valley/Lower Dolores River- Four Corners/Upper Dolores River-Animas River Basin- San Juan River Basin-Southeast Utah-Eastern Uinta Mountains- Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat- La Sal and Abajo Mountains-Canyonlands/Natural Bridges- 505 AM MDT Fri Apr 5 2024 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight High Wind Warnings and Wind Advisories are in place for eastern Utah and western Colorado today. Winds will blow 30 to 50 mph with gusts 55-75 mph today. Winter Weather advisories begin tonight and continue through Sunday morning for Colorado mountain zones, where 6-12 inches of new snow will fall Friday night through Saturday night. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Scattered snow showers will continue Saturday for the mountains. Wraparound snow showers from the departing low will bring additional accumulations of snow to the northern Mountains Saturday night. Additional mountain snow is expected with another weak disturbance on Monday afternoon/evening. Dry conditions begin Tuesday onward. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
Preliminary Local Storm Report
National Weather Service Grand Junction CO
1204 PM MDT Fri Apr 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1149 AM Non-Tstm Wnd Gst 10 SSW Douglas Pass 39.46N 108.88W
04/05/2024 M49 MPH Garfield CO Mesonet
Mesonet station DMMC2 Demaree, Mack 16N.
&&
NLPreliminary Local Storm Report
National Weather Service Grand Junction CO
1205 PM MDT Fri Apr 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0948 AM Non-Tstm Wnd Gst 7 E Escalante Forks 38.57N 108.28W
04/05/2024 M47 MPH Montrose CO Mesonet
Mesonet station CMEC2 Cottonwood Basin.
&&
NLPreliminary Local Storm Report
National Weather Service Grand Junction CO
1206 PM MDT Fri Apr 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1140 AM Non-Tstm Wnd Gst 40 NNE Castle Valley 39.17N 109.14W
04/05/2024 M47 MPH Grand UT Mesonet
Mesonet station UTHAD I-70 At Mp 226 Harley
Dome.
&&
NLPreliminary Local Storm Report
National Weather Service Grand Junction CO
1207 PM MDT Fri Apr 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1130 AM Non-Tstm Wnd Gst 2 E Rifle 39.53N 107.73W
04/05/2024 M47 MPH Garfield CO ASOS
ASOS station KRIL Garfield County Rgnl AP.
&&
NLPreliminary Local Storm Report
National Weather Service Grand Junction CO
107 PM MDT Fri Apr 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1248 PM Non-Tstm Wnd Gst 1 E Vernal 40.45N 109.52W
04/05/2024 M51 MPH Uintah UT ASOS
ASOS station KVEL Vernal Rgnl Airport.
&&Preliminary Local Storm Report
National Weather Service Grand Junction CO
307 PM MDT Fri Apr 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0140 PM Non-Tstm Wnd Gst 1 W Douglas Pass 39.60N 108.82W
04/05/2024 M90 MPH Garfield CO Mesonet
Mesonet station CO098 139s034 Douglas Pass.
1230 PM Non-Tstm Wnd Gst 6 W Manila 40.99N 109.84W
04/05/2024 M69 MPH Daggett UT Mesonet
Mesonet station UT43W Sr-43 At Mp 0.5 West
Stateline.
1230 PM Non-Tstm Wnd Gst 2 SW Maeser 40.46N 109.61W
04/05/2024 M66 MPH Uintah UT Mesonet
Mesonet station EW3712 Vernal.
0216 PM Non-Tstm Wnd Gst 1 E Blanding Muni Arpt 37.58N 109.47W
04/05/2024 M56 MPH San Juan UT AWOS
AWOS station KBDG Blanding.
&&The national radar mosaic for the moment the first event began.
6 winter weather, 1 winter storm. Local standard time, as filed.
Generally 10 to 15 inches of snow fell across the area. Winds gusted 55 to 65 mph at Storm Peak Lab.
Generally 4 to 8 inches of snow fell across the area with 9 inches measured at McClure Pass. Winds gusted 45 to 65 mph at elevations above 11,000 feet MSL with a peak wind gust of 69 mph measured at Irwin Guides Ridge Top.
Generally 4 to 8 inches of snow fell across the area with up to 10 inches at Sharkstooth. Winds gusted 60 to 80 mph at elevations above 12,000 feet MSL.
Generally 4 to 8 inches of snow fell across the area with 9 inches reported at Cedaredge 10.5 NNW.
Generally 4 to 8 inches of snow fell across the area. Winds gusted 45 to 55 mph at elevations above 11,000 feet MSL.
Generally 6 to 12 inches of snow fell across the area.
Generally 8 to 9 inches of snow fell at Columbine Pass.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2024Every state in 2024This day in weather historyWarnings in Colorado, April 2024
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1173518, 1173521, 1173524, 1173519, 1173520, 1173522, 1173523.