Severe Thunderstorm Warning 15, NWS Grand Junction, CO

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Hazardous Weather Outlook
National Weather Service Grand Junction CO
547 AM MDT Tue Aug 21 2018

COZ001>014-017>023-UTZ022>025-027>029-221200-
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-
547 AM MDT Tue Aug 21 2018

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

.DAY ONE...Today and Tonight

Showers and thunderstorms will be common across the entire
forecast area today as monsoonal moisture has returned. Some of
the convection will be heavy. A flash flood watch has been issued
for the burn scars across the area as low amounts of rainfall can
create flash flooding, mud slides, and debris flows. Rainfall will
continue overnight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Shower and storms will continue into Wednesday bringing more
precipitation to the area. Drying conditions will kick in Thursday
and Friday before another round of showers and storms moves in for
the weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

Special Weather Statement
National Weather Service Grand Junction CO
1050 AM MDT TUE AUG 21 2018

COZ006-017-211715-
Uncompahgre Plateau/Dallas Divide CO-Grand Valley CO-
1050 AM MDT TUE AUG 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MESA COUNTY UNTIL 1115 AM
MDT...

At 1050 AM MDT, Doppler radar was tracking a strong thunderstorm 12
miles southwest of Grand Junction, moving northeast at 25 mph. This
storm was located near Glade Park.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Grand Junction, Orchard Mesa, Glade Park, Redlands, Fruitvale and
Clifton.

This includes the following highways...
 Interstate 70 in Colorado near mile marker 30.
 U.S. Highway 50 in Colorado between mile markers 32 and 38.

LAT...LON 3894 10876 3899 10879 3912 10856 3908 10849
      3900 10848
TIME...MOT...LOC 1650Z 243DEG 22KT 3898 10873

Charnick

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Special Weather Statement
National Weather Service Grand Junction CO
1108 AM MDT TUE AUG 21 2018

COZ003-006-007-211800-
Roan and Tavaputs Plateaus CO-Debeque to Silt Corridor CO-
Grand Valley CO-
1108 AM MDT TUE AUG 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL MESA COUNTY UNTIL
NOON MDT...

At 1108 AM MDT, Doppler radar was tracking a strong thunderstorm
near and just north of Grand Junction, moving northeast at 30 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Grand Junction.

LAT...LON 3912 10859 3915 10862 3937 10840 3933 10831
      3925 10827
TIME...MOT...LOC 1708Z 229DEG 28KT 3915 10858

Charnick

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1113 AM MDT TUE AUG 21 2018

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

1023 AM     TSTM WND GST     PINTO, MASSADONA 18SE   40.02N 108.40W
08/21/2018  M45 MPH          RIO BLANCO         CO   MESONET

            MESONET STATION PIRC2, PINTO, MASSADONA
            18SE.

&&

NL

Special Weather Statement
National Weather Service Grand Junction CO
1119 AM MDT TUE AUG 21 2018

COZ003-006-007-009-211745-
Roan and Tavaputs Plateaus CO-Grand and Battlement Mesas CO-
Debeque to Silt Corridor CO-Grand Valley CO-
1119 AM MDT TUE AUG 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL MESA COUNTY UNTIL
1145 AM MDT...

At 1119 AM MDT, Doppler radar was tracking a strong thunderstorm near
Grand Junction, moving east at 25 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Grand Junction, Palisade, Cameo, Fruitvale, Clifton, Orchard Mesa and
Redlands.

This includes the following highways...
 Interstate 70 in Colorado between mile markers 35 and 49.
 U.S. Highway 50 in Colorado between mile markers 32 and 39.
 Colorado 65 between mile markers 60 and 61.
 Colorado 141 between mile markers 157 and 162.

LAT...LON 3899 10856 3906 10859 3919 10827 3912 10820
      3903 10820
TIME...MOT...LOC 1719Z 250DEG 24KT 3904 10850

Charnick

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1152 AM MDT TUE AUG 21 2018

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

1108 AM     HAIL             GRAND JCT. 3NW          39.14N 108.59W
08/21/2018  E0.25 INCH       MESA               CO   NWS EMPLOYEE

            0.40 INCH DIAMETER HAIL FOR 5 MINUTES.

&&