Hazardous Weather Outlook
Issued by NWS Grand Junction, CO

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FLUS45 KGJT 182057
HWOGJT

Hazardous Weather Outlook
National Weather Service GRAND JUNCTION CO
257 PM MDT Tue Jul 18 2017

COZ003-006-007-009-011-017-020>023-UTZ022-025-027>029-191200-
Roan and Tavaputs Plateaus-Grand Valley-Debeque to Silt Corridor-
Grand and Battlement Mesas-
Central Gunnison and Uncompahgre River Basin-
Uncompahgre Plateau and Dallas Divide-
Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Tavaputs Plateau-
Arches/Grand Flat-La Sal and Abajo Mountains-
Canyonlands/Natural Bridges-
257 PM MDT Tue Jul 18 2017

This hazardous weather outlook is for portions of northwest
Colorado...southwest Colorado...west central Colorado...east
central Utah and southeast Utah.

.DAY ONE...This Afternoon and Tonight

Isolated to scattered thunderstorm will occur this afternoon and
evening. Outflow winds remain a threat with gusts of 35 to 45 mph
possible in some of the storms. Localized areas of heavy rain
also possible in the south which could lead to some runoff
problems. Lightning is a threat with every storm.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

A flash flood watch in in effect for the area Wednesday late
morning through midnight Thursday. The monsoon returns to our
region by Wednesday morning and will bring an increase in
thunderstorm coverage by the afternoon. Flooding due to heavy
rainfall rates will become more likely Wednesday through the end
of the week. Some storms will also be capable of producing gusty
outflow winds but every storm will have the potential to create
dangerous cloud to ground lightning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected today or tonight, however
spotters are encouraged to relay rainfall amounts or any observed
flooding to the National Weather Service in Grand Junction.

$$

COZ001-002-004-005-008-010-012>014-018-019-UTZ023-024-191200-
Lower Yampa River Basin-Central Yampa River Basin-
Elkhead and Park Mountains-Upper Yampa River Basin-
Central Colorado River Basin-
Gore and Elk Mountains/Central Mountain Valleys-
West Elk and Sawatch Mountains-Flat Tops-
Upper Gunnison River Valley-Northwest San Juan Mountains-
Southwest San Juan Mountains-Eastern Uinta Mountains-
Eastern Uinta Basin-
257 PM MDT Tue Jul 18 2017

This hazardous weather outlook is for portions of northwest
Colorado...southwest Colorado...west central Colorado and
northeast Utah.

.DAY ONE...This Afternoon and Tonight

Isolated to scattered thunderstorm will occur this afternoon and
evening. The better coverage of storms will be over the central
and southern mountain ranges with drier air infiltrating up north.
Outflow winds remain a threat with gusts of 35 to 45 mph possible
in some of the storms. Localized areas of heavy rain also
possible in the south which could lead to some runoff problems.
Lightning is a threat with every storm.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The monsoon returns to our region by Wednesday morning and will
bring an increase in thunderstorm coverage by the afternoon.
Localized flooding due to heavy rainfall rates will become more
likely tomorrow through the end of the week as this moist air mass
remain in the area. Some storms will also be capable of producing
gusty outflow winds but every storm will have the potential to
create dangerous cloud to ground lightning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected today or tonight, however
spotters are encouraged to relay rainfall amounts or any observed
flooding to the National Weather Service in Grand Junction.

$$



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