Flood Watch issued September 21 at 1:02AM MDT until September 23 at

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of central, east central, north central,
northeast, southeast, and west central New Mexico, including the
following areas, in central New Mexico, Central Highlands, Eastern
Lincoln County, Estancia Valley, Lower Rio Grande Valley, Middle
Rio Grande Valley including the Albuquerque Metro Area, San Agustin
Plains and Adjacent Lowlands, Sandia and Manzano Mountains
including Edgewood, South Central Highlands, South Central
Mountains and Upper Tularosa Valley. In east central New Mexico, De
Baca County and Guadalupe County. In north central New Mexico, East
Slopes Sangre de Cristo Mountains, Espanola Valley, Glorieta Mesa
Including Glorieta Pass, Jemez Mountains, Northwest Highlands,
Santa Fe Metro Area and Southern Sangre de Cristo Mountains. In
northeast New Mexico, Eastern San Miguel County, Far Northeast
Highlands, Harding County and Northeast Highlands. In southeast New
Mexico, Chaves County Plains and Southwest Chaves County. In west
central New Mexico, Southwest Mountains, West Central Highlands and
West Central Mountains.

* WHEN...From Tuesday afternoon through Wednesday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas. Low-water crossings may be
flooded. Storm drains and ditches may become clogged with debris.
Extensive street flooding and flooding of creeks and rivers are
possible.

* ADDITIONAL DETAILS...
- A dangerous surge of monsoon moisture will arrive Tuesday and
Wednesday with widespread heavy rain.  Scattered occurrences of
flash flooding are likely, and there will probably be some main
stem river and tributary flooding, as the most likely rain amount
by Wednesday afternoon exceeds 2 inches in many locations along
and east of the central mountain chain, and 1 inch in many
locations westward to the continental divide. Stronger storms
will produce torrential rainfall at rates over 2 inches per hour,
and storms will train repeatedly in succession over some
locations, with locally heavier rain amounts reaching 4 to 6
inches over portions of central and eastern New Mexico.  Heavy
rain will likely continue Wednesday night over eastern areas,
then showers and storms with locally heavy rainfall are forecast
to return along and east of the continental divide again on
Thursday.
- Rapid runoff and flash flooding will be most likely in complex
terrain, below recent burn scars, low-lying areas, urban areas,
normally dry arroyos, and near rivers and streams.  As the event
unfolds, locations with saturated ground will also become prone
to rapid runoff and flash flooding from additional rounds of
storms.
- http://www.weather.gov/safety/flood