THOUSAND PALMS, Cali. -

 An arctic airmass digging into the Southwest will bring the first freeze of the year for many Southern California cities over the next few nights. Joshua Tree National Park is under a Freeze Warning while high desert cities to the north are under a Hard Freeze Warning.

Overnight lows are expected to drop to the 20's in those high desert locations, which can potentially damage crops and sensitive plants. Take preventative measures to reduce impacts from this cold snap by bringing pets indoors, checking on the elderly, and covering exposed plumbing if applicable.

The lower deserts including the Coachella Valley will likely see lows in the 30's for the next several nights, with patchy frost expected. Frost can also damage crops and sensitive plants, so valley residents should take similar steps to protect their pets and porperty.

Details for the Freeze and Hard Freeze Warnings are listed below.

Hard Freeze Warning

...FIRST HARD FREEZE OF THE SEASON WEDNESDAY NIGHT THROUGH FRIDAY
MORNING...

.MUCH COLDER TEMPERATURES HAVE ARRIVED ACROSS THE REGION WITH THE
FIRST FREEZE EXPECTED AT MANY LOCATIONS ACROSS THE MOJAVE DESERT WEDNESDAY
NIGHT THROUGH FRIDAY MORNING. A HARD FREEZE IS EXPECTED AT SOME LOCATIONS.

NORTHWEST DESERTS-LAKE MEAD NATIONAL RECREATION AREA-
DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT-
EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN-
NORTHEAST CLARK COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY-
LAS VEGAS VALLEY-SOUTHERN CLARK COUNTY-
INCLUDING...KINGMAN...GOLDEN VALLEY...DOLAN SPRINGS...
VALENTINE...WIKIEUP...YUCCA...BULLHEAD CITY...MOHAVE VALLEY...
FURNACE CREEK...SHOSHONE...BARSTOW...DAGGETT...FORT IRWIN...BAKER...
MOUNTAIN PASS...MITCHELL CAVERNS...MORONGO VALLEY...YUCCA VALLEY...
TWENTYNINE PALMS...VIDAL JUNCTION...MESQUITE...OVERTON...MOAPA...
PAHRUMP...INDIAN SPRINGS...DESERT ROCK...AMARGOSA VALLEY...
LAS VEGAS...NORTH LAS VEGAS...HENDERSON...BOULDER CITY...
SUMMERLIN...NELLIS...MOUNTAINS EDGE...SEVEN HILLS...BLUE DIAMOND...
HOOVER DAM...LAUGHLIN...PRIMM...SEARCHLIGHT...CAL-NEV-ARI
327 AM PST WED DEC 4 2013 /427 AM MST WED DEC 4 2013/

...HARD FREEZE WARNING IN EFFECT FROM 9 PM PST /10 PM MST/ THIS
EVENING TO 9 AM PST /10 AM MST/ FRIDAY...

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A HARD FREEZE
WARNING FOR MUCH OF THE MOJAVE DESERT REGION...WHICH IS IN EFFECT
FROM 9 PM PST /10 PM MST/ THIS EVENING TO 9 AM PST /10 AM MST/
FRIDAY. THIS IS AN UPGRADE TO THE HARD FREEZE WATCH.

* LOCATIONS AND LOW TEMPERATURES...
  LAS VEGAS VALLEY...MID TO UPPER 20S.
  PAHRUMP AREA...UPPER TEENS TO LOW 20S.
  COLORADO RIVER VALLEY...UPPER 20S TO LOW 30S.
  MESQUITE AREA...UPPER TEENS TO LOW 20S.
  SOUTHERN CLARK COUNTY...MID TO UPPER 20S.
  KINGMAN AREA...UPPER TEENS.
  MEADVIEW AREA...MID 20S.
  BARSTOW AREA...MID TO UPPER 20S.
  BAKER AREA...UPPER 20S.
  YUCCA AND MORONGO VALLEYS...MID TO UPPER 20S.
  DEATH VALLEY AREA...UPPER 20S TO LOW 30S.

* FREEZE IMPACTS: IN MANY AREAS THESE WILL BE THE FIRST FREEZING
  TEMPERATURES EXPERIENCED THIS SEASON. PROTECT SENSITIVE PLANTS AND
  EXPOSED IRRIGATION PLUMBING WHICH MAY BE DAMAGED. PETS MAY SUFFER
  IF LEFT OUTDOORS. RUN POOL PUMPS OVERNIGHT TO LIMIT THE POTENTIAL
  FOR DAMAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HARD FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT
OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

Freeze Warning

JOSHUA TREE NATIONAL PARK-
INCLUDING THE CITY OF...COTTONWOOD VISITOR CENTER
311 AM PST WED DEC 4 2013

...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 8 AM PST
THURSDAY...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 8 AM PST
THURSDAY. THE FREEZE WATCH IS NO LONGER IN EFFECT.

* AFFECTED AREA...JOSHUA TREE NATIONAL PARK...INCLUDING COTTONWOOD
  VISITOR CENTER.

* TEMPERATURES...LOWS RANGING FROM 23 TO 30 DEGREES.

* IMPACTS...LONG DURATIONS OF BELOW FREEZING TEMPERATURES CAN KILL
  SENSITIVE VEGETATION. THERE WILL ALSO BE AN INCREASED RISK OF
  HYPOTHERMIA FOR THOSE CAMPING OUTDOORS AND UNPREPARED FOR THE COLD
  WEATHER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL DESTROY OR DAMAGE SENSITIVE
VEGETATION.