WWA Summary for All Issued by SLC

Flood Watch

Flood Watch
National Weather Service Las Vegas NV
1210 PM PDT Sat Sep 26 2026

AZZ001-575-576-271200-
/O.NEW.KVEF.FA.A.0004.260928T1200Z-260930T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northwest Plateau-Hualapai Mountains-Northwest Deserts-
Including the cities of Pipe Spring National Monument, Golden Valley,
Valentine, Western Grand Canyon, Tuweep, Dolan Springs, Yucca, Mt
Trumbull, Hualapai Peak, Kingman, Wikieup, and Colorado City
1210 PM MST Sat Sep 26 2026

...FLOOD WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY
EVENING...

* WHAT...Flooding caused by excessive rainfall is possible.

* WHERE...A portion of northwest Arizona, including the following
  areas, Hualapai Mountains, Northwest Deserts and Northwest Plateau.

* WHEN...From early Monday morning through Tuesday evening.

* 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...
  - Showers and thunderstorms capable of producing flash flooding.
  - Kingman, Colorado City, Valentine, Dolan Springs, Wikieup, Peach
    Springs.
  - 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.

&&

$$

CO

Flood Watch
National Weather Service Flagstaff AZ
1201 PM MST Sat Sep 26 2026

AZZ004>018-037>040-290645-
/O.NEW.KFGZ.FA.A.0009.260928T0600Z-260930T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kaibab Plateau-Marble and Glen Canyons-Grand Canyon Country-
Coconino Plateau-Yavapai County Mountains-Northeast Plateaus and
Mesas Hwy 264 Northward-Chinle Valley-Chuska Mountains and
Defiance Plateau-Little Colorado River Valley in Coconino County-
Little Colorado River Valley in Navajo County-Little Colorado
River Valley in Apache County-Western Mogollon Rim-Eastern
Mogollon Rim-White Mountains-Northern Gila County-Yavapai County
Valleys and Basins-Oak Creek and Sycamore Canyons-Black Mesa Area-
Northeast Plateaus and Mesas South of Hwy 264-
Including the cities of Valle, Young, Klagetoh, Dilkon, Tuba City,
Springerville, Lees Ferry, Tusayan, Page, Window Rock, Cottonwood,
Steamboat Canyon, Happy Jack, Show Low,
Pinetop-Lakeside, Ganado, Grand Canyon North Rim, Kayenta,
Holbrook, Heber, Strawberry, Bagdad, Chinle, Chambers, Fort Defiance,
Navajo National Monument, Supai, Ash Fork, Kaibito, Winslow, Forest
Lakes, Grand Canyon Village, Camp Verde, Sanders, Jadito, Kykotsmovi,
Keams Canyon, Flagstaff, Wupatki National Monument, Snowflake, Greer,
Payson, Village of Oak Creek, Williams, Cordes Junction, Jacob Lake,
Shonto, Crown King, Wide
Ruins, Seligman, Prescott, Munds Park, Fredonia, Sedona, St.
Johns, and Canyon De Chelly
1201 PM MST Sat Sep 26 2026 /101 PM MDT Sat Sep 26 2026/

...FLOOD WATCH IN EFFECT FROM SUNDAY EVENING THROUGH TUESDAY
EVENING...

* WHAT...Flooding caused by excessive and long duration rainfall.

* WHERE...All of northern and central Arizona.

* WHEN...From Sunday evening through Tuesday evening.

* IMPACTS...Flooding will be possible over burn areas, low-water
  crossings, creeks, streams, washes and swimming holes. Larger
  creeks and rivers may exceed bankfull. Flooding of paved roads and
  highway underpasses will be possible. Unpaved roads could become
  muddy and impassable.

* ADDITIONAL DETAILS...
  - Low pressure will interact with tropical moisture from the
    eastern Pacific. This could potentially produce numerous showers
    and embedded thunderstorms, with heavy rain that will fall over
    saturated soils and burn scars. This could lead to localized
    flash flooding and rises on local rivers, such as the Little
    Colorado River.
  - Additional information is available at weather.gov/flagstaff.

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.

&&

$$

Bernhart

Hydrologic Outlook

Hydrologic Outlook
COC007-033-051-053-067-083-091-111-113-UTC019-037-301200-

Hydrologic Outlook
National Weather Service Grand Junction CO
221 PM MDT Fri Sep 25 2026

In the wake of today`s precipitation, our attention will turn to the
Eastern Pacific. Tropical moisture is anticipated to spread across
the Desert Southwest early next week, drawing moisture from a pair of
Hurricanes; Odalys and Polo. The forecast becomes increasing complex
due to a closed low currently forecast to drive across the Southwest
CONUS as Hurricane Polo approaches the Baja California Peninsula.
Strong southerly winds ahead of the low are expected to pull tropical
moisture towards eastern Utah and western Colorado as early as Monday
morning. The challenge and uncertainty in our precipitation forecast
increase as the week progresses and the low traverses our southern
States. Excessive rainfall is most probable over AZ and NM, attm, but
the northerly extent poses a threat to our southern San Juan river
basins. Current forecasts suggests 1 to 3 inches of rain over Monday
morning through Wednesday. At face value, rivers and tributaries will
see a bump up due to said moisture. However, localized heavier
amounts could result in minor flooding across the southern San Juan
foothills and communities further downstream.

Rivers have responded rapidly to recent rainfall due to saturated
soils and increased runoff potential. Thus, prolonged periods of
additional rainfall over these regions would trigger a similar
response. The current precipitation forecast suggests larger peaks in
several creeks and rivers than what has been observed over the
previous 7 days. However, high end probabilistic rainfall amounts
(i.e. above 90th percentile) may lead to rivers exceeding action
stage to minor flooding. Most probable basins to see significant
rises include; the Rio Blanco, San Juan, Piedra, Los Pinos/Vallecito
Creek, and the Animas River Basins.

Convective storms and periods of heavy rainfall fed from said
tropical moisture could result in localized flooding impacts across
the CWA, however, confidence decreases rapidly north of the San
Juans. Please continue to monitor the forecast as these systems
evolve. Especially for those who reside and/or plan to recreate in
the southwest quadrant of the forecast area.

$$

ERW