Severe Thunderstorm Warning 28, NWS Grand Junction, CO

123 
WWUS55 KGJT 032110
SVSGJT

Severe Weather Statement
National Weather Service Grand Junction CO
310 PM MDT Fri Sep 3 2021

UTC047-032130-
/O.CON.KGJT.SV.W.0028.000000T0000Z-210903T2130Z/
Uintah UT-
310 PM MDT Fri Sep 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MDT
FOR WEST CENTRAL UINTAH COUNTY...

At 309 PM MDT, a severe thunderstorm was located 20 miles southeast
of Myton, or 21 miles south of Fort Duchesne, moving east at 20 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of west
central Uintah County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3990 10991 4006 10991 4009 10952 3986 10959
TIME...MOT...LOC 2109Z 274DEG 18KT 3997 10982 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Stearns

581 
WWUS55 KGJT 032125
SVSGJT

Severe Weather Statement
National Weather Service Grand Junction CO
325 PM MDT Fri Sep 3 2021

UTC047-032135-
/O.EXP.KGJT.SV.W.0028.000000T0000Z-210903T2130Z/
Uintah UT-
325 PM MDT Fri Sep 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL UINTAH COUNTY
WILL EXPIRE AT 330 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However, small 
hail and gusty winds will remain possible with this thunderstorm.

LAT...LON 3990 10991 4006 10991 4009 10952 3986 10959
TIME...MOT...LOC 2125Z 288DEG 16KT 3995 10974 

$$

Stearns

Area Forecast Discussion
National Weather Service Grand Junction CO
209 PM MDT Fri Sep 3 2021

.SHORT TERM...(Tonight through Saturday night)
Issued at 142 PM MDT Fri Sep 3 2021

Current satellite imagery shows several areas of low and mid
level clouds generally across the central portions of the forecast
area this afternoon. Radar returns also indicate several clusters
of moderate to strong cells along the Tavaputs/Bookcliffs and
Uncompahgre Plateau in addition to a few showers scattered
elsewhere. Some of the stronger storms have been producing small
hail and brief heavy rainfall. Southwest flow continues this
afternoon as the aformentioned trough moves across to our north.
Expect ongoing precipitation to continue through the early
evening hours when solar heating winds down. Max temperatures
tomorrow will continue a slight warming trend as we reach back up
to near-normal highs. Overnight lows will remain fairly similar
(near normals) to the last few nights. High pressure begins
building over the southwest CONUS tomorrow and will impede much
convective activity as flow turns west-northwesterly.

.LONG TERM...(Sunday through Friday)
Issued at 142 PM MDT Fri Sep 3 2021

A large area of high pressure will remain centered to our west, over
Nevada. To our south, plenty of moisture can be seen but flow around
the high will deflect said moisture and keep it in southern portions
of New Mexico and Arizona. The location of the high pressure will
keep upper level winds from the north (mostly) and fairly light
through Wednesday. By Thursday, the high pressure center will have
shifted to the Four Corners and it's this timeframe when some of the
moisture to the south will try to sneak up under the high pressure.
Guidance is not all that excited and the NBM does keep us mostly dry
with a very slim chance for a quick one off shower or storm over the
higher terrain. Either way, moisture will be limited so any
convection that forms will bring some gusty outflow winds and
that'll be about it. Guidance, heading into the weekend, has some
huge discrepancies with the EC keeping us under the influence of
high pressure while the GFS brings a deep trough into the
Intermountain West tapping into some monsoonal moisture. Plenty of
time to hammer out these details so the gist of the forecast will be
sunny skies, dry conditions, the usual afternoon breezes, and warm
temperatures under high pressure.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1131 AM MDT Fri Sep 3 2021

Convection has already started firing with some showers and
storms getting close to KASE and KEGE so included VCTS with some
tempo -TSRA for the afternoon hours. KHDN and possibly KRIL and
KTEX may also see some convection so included VCTS for those TAF
sites as well. Some heavier showers and gusty outflows will be the
biggest concern. Don't expect ILS breakpoints to be reached but
in the off chance they do, they shouldn't last for too long.
Convection will die down once the sun starts going down, leading
to a tranquil night and a calm day tomorrow as high pressure
builds in.

&&

.GJT WATCHES/WARNINGS/ADVISORIES...
CO...None.
UT...None.
&&

SHORT TERM...SS
LONG TERM...TGR
AVIATION...TGR

Hazardous Weather Outlook
National Weather Service Grand Junction CO
124 AM MDT Fri Sep 3 2021

COZ001>014-017>023-UTZ022>025-027>029-041300-
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-
124 AM MDT Fri Sep 3 2021

This hazardous weather outlook is for eastern Utah and western
Colorado.

.DAY ONE...Today and Tonight

Isolated to scattered showers and thunderstorms will develop this
afternoon, favoring the higher terrain of western Colorado. Gusty
winds, lightning and brief heavy rain will be the main threats.
Activity will diminish overnight resulting in dry conditions.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

A drying and warming trend will commence this weekend and into
early to mid next week as a strong ridge of high pressure builds
over the western states.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1200 PM MDT FRI SEP 3 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1205 AM     HEAVY RAIN       4 NW GRAND CO ARPT      38.53N 109.50W
09/02/2021  M0.62 INCH       GRAND              UT   TRAINED SPOTTER

            TOTAL RAINFALL ON SEPT 1.

&&