Alert archive / Arizona / Freeze Warnings in 2017

Freeze Warning 2, NWS Phoenix, AZ

December 20, 20174 counties in Arizona

NWS Phoenix, AZ issued this freeze warning at Dec 20, 2017, 2:22 PM MST for 4 counties in Arizona. It took effect at Dec 21, 2017, 11:00 PM MST. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 20, 2017, 2:22 PM MST (21:22 UTC)
In effect from
Dec 21, 2017, 11:00 PM MST
Expired
Dec 22, 2017, 9:00 AM MST
In force
10 hr
Issued by
NWS Phoenix, AZ

Counties Gila County, AZ, La Paz County, AZ, Maricopa County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 48 km from the middle of the area, began a volume at 21:22 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tuscon, AZ (KDMA), launched 12:00Z, 9.4 hours before the alert went out and 184 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2017-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2017-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1844 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

373 
WWUS75 KPSR 202122
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
222 PM MST Wed Dec 20 2017

AZZ552-556>558-560>562-210930-
/O.UPG.KPSR.FZ.A.0002.171222T0600Z-171222T1600Z/
/O.NEW.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
222 PM MST Wed Dec 20 2017

...FREEZE WARNING IN EFFECT FROM 11 PM THURSDAY TO 9 AM MST
FRIDAY...

The National Weather Service in Phoenix has issued a Freeze
Warning, which is in effect from 11 PM Thursday to 9 AM MST
Friday. The Freeze Watch is no longer in effect. 

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly insulated 
  pipes may burst. The extreme cold is also dangerous for any pets
  left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-210930-
/O.UPG.KPSR.FZ.A.0002.171222T0600Z-171222T1600Z/
/O.NEW.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
222 PM MST Wed Dec 20 2017

...FREEZE WARNING IN EFFECT FROM 11 PM THURSDAY TO 9 AM MST
FRIDAY...

The National Weather Service in Phoenix has issued a Freeze
Warning, which is in effect from 11 PM Thursday to 9 AM MST
Friday. The Freeze Watch is no longer in effect. 

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly insulated 
  pipes may burst. The extreme cold is also dangerous for any pets
  left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-210930-
/O.UPG.KPSR.FZ.A.0002.171222T0600Z-171222T1600Z/
/O.NEW.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
222 PM MST Wed Dec 20 2017

...FREEZE WARNING IN EFFECT FROM 11 PM THURSDAY TO 9 AM MST
FRIDAY...

The National Weather Service in Phoenix has issued a Freeze
Warning, which is in effect from 11 PM Thursday to 9 AM MST
Friday. The Freeze Watch is no longer in effect. 

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly insulated 
  pipes may burst. The extreme cold is also dangerous for any pets
  left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

CAZ562-210600-
/O.CON.KPSR.WI.Y.0031.171221T0000Z-171221T0600Z/
Imperial County Southwest-
Including the city of Mountain Spring
122 PM PST Wed Dec 20 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...

* AFFECTED AREA...Portions of southeast California, including 
  the Mountain Spring area along Interstate 8. 

* TIMING...Wednesday afternoon and evening.

* WINDS...West 25 to 30 mph. Gusts of 40 to 50 mph.

* IMPACTS...Strong cross winds will make driving difficult, 
  especially for high profile vehicles on east-west oriented 
  roads. Use extra caution. Localized blowing dust is also 
  possible, reducing visibilities. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that sustained wind speeds of between
30 and 40 mph are expected, or wind gusts of between 40 and
58 mph. Winds this strong can make driving difficult, especially
for high profile vehicles. In addition, strong winds over desert
areas could result in briefly lowered visibilities to well under
a mile at times in blowing dust or blowing sand. Use extra
caution.

&&

$$

CAZ560-561-564-568>570-210930-
/O.CON.KPSR.WI.Y.0031.171221T0300Z-171221T2300Z/
Joshua Tree NP West-Joshua Tree NP East-Chuckwalla Mountains-
Chiriaco Summit-Palo Verde Valley-Chuckwalla Valley-
Including the cities of Cottonwood Visitor, 
Lost Horse-Keys Village, Imperial Hot Mineral Springs, 
Chiriaco Summit, Martinez Lake, Blythe, Palo Verde, Ripley, 
and Midland
122 PM PST Wed Dec 20 2017

...WIND ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING TO 3 PM
PST THURSDAY...

* AFFECTED AREA...Portions of southeast California, including 
  Joshua Tree National Park and the Interstate 10 corridor. 

* TIMING...Wednesday evening through Thursday afternoon.

* WINDS...Northwest 20 to 30 mph. Gusts of 40 to 50 mph.

* IMPACTS...Strong cross winds will make driving difficult, 
  especially for high profile vehicles on east-west oriented 
  roads. Use extra caution. Localized blowing dust is also 
  possible, reducing visibilities. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that sustained wind speeds of between
30 and 40 mph are expected, or wind gusts of between 40 and
58 mph. Winds this strong can make driving difficult, especially
for high profile vehicles. In addition, strong winds over desert
areas could result in briefly lowered visibilities to well under
a mile at times in blowing dust or blowing sand. Use extra
caution.

&&

$$
8 follow-up statements
825 
WWUS75 KPSR 210458
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
958 PM MST Wed Dec 20 2017

AZZ552-556>558-560>562-210900-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
958 PM MST Wed Dec 20 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 9 AM
MST FRIDAY...

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-210900-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
958 PM MST Wed Dec 20 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 9 AM
MST FRIDAY...

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-210900-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
958 PM MST Wed Dec 20 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 9 AM
MST FRIDAY...

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

CAZ562-210800-
/O.EXT.KPSR.WI.Y.0031.000000T0000Z-171221T0800Z/
Imperial County Southwest-
Including the city of Mountain Spring
858 PM PST Wed Dec 20 2017

...WIND ADVISORY NOW IN EFFECT UNTIL MIDNIGHT PST TONIGHT...

* AFFECTED AREA...Portions of southeast California, including 
  the Mountain Spring area along Interstate 8. 

* TIMING...Wednesday afternoon and evening.

* WINDS...West 25 to 30 mph. Gusts of 40 to 50 mph.

* IMPACTS...Strong cross winds will make driving difficult, 
  especially for high profile vehicles on east-west oriented 
  roads. Use extra caution. Localized blowing dust is also 
  possible, reducing visibilities. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that sustained wind speeds of between
30 and 40 mph are expected, or wind gusts of between 40 and
58 mph. Winds this strong can make driving difficult, especially
for high profile vehicles. In addition, strong winds over desert
areas could result in briefly lowered visibilities to well under
a mile at times in blowing dust or blowing sand. Use extra
caution.

&&

$$

CAZ560-561-564-568>570-210900-
/O.CON.KPSR.WI.Y.0031.000000T0000Z-171221T2300Z/
Joshua Tree NP West-Joshua Tree NP East-Chuckwalla Mountains-
Chiriaco Summit-Palo Verde Valley-Chuckwalla Valley-
Including the cities of Cottonwood Visitor, 
Lost Horse-Keys Village, Imperial Hot Mineral Springs, 
Chiriaco Summit, Martinez Lake, Blythe, Palo Verde, Ripley, 
and Midland
858 PM PST Wed Dec 20 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY...

* AFFECTED AREA...Portions of southeast California, including 
  Joshua Tree National Park and the Interstate 10 corridor. 

* TIMING...Wednesday evening through Thursday afternoon.

* WINDS...Northwest 20 to 30 mph. Gusts of 40 to 50 mph.

* IMPACTS...Strong cross winds will make driving difficult, 
  especially for high profile vehicles on east-west oriented 
  roads. Use extra caution. Localized blowing dust is also 
  possible, reducing visibilities. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that sustained wind speeds of between
30 and 40 mph are expected, or wind gusts of between 40 and
58 mph. Winds this strong can make driving difficult, especially
for high profile vehicles. In addition, strong winds over desert
areas could result in briefly lowered visibilities to well under
a mile at times in blowing dust or blowing sand. Use extra
caution.

&&

$$
740 
WWUS75 KPSR 210752
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1252 AM MST Thu Dec 21 2017

CAZ562-210900-
/O.EXP.KPSR.WI.Y.0031.000000T0000Z-171221T0800Z/
Imperial County Southwest-
Including the city of Mountain Spring
1152 PM PST Wed Dec 20 2017

...WIND ADVISORY WILL EXPIRE AT MIDNIGHT PST TONIGHT...

A cold front has moved through southeast California, and will
bring a gradual decrease in wind speeds overnight. Locally gusty
winds will continue across some ridgetops and within area passes,
but advisory-level winds are no longer anticipted.

$$

AZZ552-556>558-560>562-220000-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
1252 AM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-220000-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
1252 AM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-220000-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
1252 AM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

CAZ560-561-564-568>570-212300-
/O.CON.KPSR.WI.Y.0031.000000T0000Z-171221T2300Z/
Joshua Tree NP West-Joshua Tree NP East-Chuckwalla Mountains-
Chiriaco Summit-Palo Verde Valley-Chuckwalla Valley-
Including the cities of Cottonwood Visitor, 
Lost Horse-Keys Village, Imperial Hot Mineral Springs, 
Chiriaco Summit, Martinez Lake, Blythe, Palo Verde, Ripley, 
and Midland
1152 PM PST Wed Dec 20 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THURSDAY...

* AFFECTED AREA...Portions of southeast California, including 
  Joshua Tree National Park and the Interstate 10 corridor. 

* TIMING...Wednesday evening through Thursday afternoon.

* WINDS...Northwest 20 to 30 mph. Gusts of 40 to 50 mph.

* IMPACTS...Strong cross winds will make driving difficult, 
  especially for high profile vehicles on east-west oriented 
  roads. Use extra caution. Localized blowing dust is also 
  possible, reducing visibilities. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that sustained wind speeds of between
30 and 40 mph are expected, or wind gusts of between 40 and
58 mph. Winds this strong can make driving difficult, especially
for high profile vehicles. In addition, strong winds over desert
areas could result in briefly lowered visibilities to well under
a mile at times in blowing dust or blowing sand. Use extra
caution.

&&

$$
447 
WWUS75 KPSR 211828
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1128 AM MST Thu Dec 21 2017

AZZ552-556>558-560>562-220630-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
1128 AM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-220630-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
1128 AM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-220630-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
1128 AM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ532-536-539-559-CAZ565-567-220000-
/O.NEW.KPSR.DU.Y.0027.171221T1828Z-171222T0000Z/
Yuma-Gila River Valley-Gila Bend-Sonoran Desert Natl Monument-
Imperial County Southeast-Imperial Valley-
Including the cities of Yuma, Fortuna Foothills, Ligurta, 
Gila Bend, Sentinel, Winterhaven, El Centro, Calexico, Alamorio, 
and Brawley
1128 AM MST Thu Dec 21 2017 /1028 AM PST Thu Dec 21 2017/

...BLOWING DUST ADVISORY IN EFFECT UNTIL 5 PM MST /4 PM PST/ THIS
AFTERNOON...

The National Weather Service in Phoenix has issued a Blowing Dust
Advisory, which is in effect until 5 PM MST /4 PM PST/ this
afternoon. 

* AFFECTED AREA...Interstate 8 Corridor from Maricopa county
  through portions of Southeast California.

* TIMING...Now until late afternoon today.

* WINDS...Gusty northwest winds 30 mph.

* VISIBILITY...As low as one-half mile in localized dust channels.

* IMPACTS...Strong northwest winds will lead to areas of blowing
  dust or localized dust channels rapidly reducing roadway 
  visibilities along the highway corridor. Travel with caution.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be ready for a sudden drop in visibility. If you encounter
blowing dust or blowing sand on the roadway or see it
approaching, pull off the road as far as possible and put your
vehicle in park. Turn the lights all the way off and keep your
foot off the brake pedal.

Remember, pull aside, stay alive.

&&

$$

CAZ560-561-564-568>570-212300-
/O.CON.KPSR.WI.Y.0031.000000T0000Z-171221T2300Z/
Joshua Tree NP West-Joshua Tree NP East-Chuckwalla Mountains-
Chiriaco Summit-Palo Verde Valley-Chuckwalla Valley-
Including the cities of Cottonwood Visitor, 
Lost Horse-Keys Village, Imperial Hot Mineral Springs, 
Chiriaco Summit, Martinez Lake, Blythe, Palo Verde, Ripley, 
and Midland
1028 AM PST Thu Dec 21 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS
AFTERNOON...

* AFFECTED AREA...Portions of southeast California, including 
  Joshua Tree National Park and the Interstate 10 corridor. 

* TIMING...Wednesday evening through Thursday afternoon.

* WINDS...Northwest 20 to 30 mph. Gusts of 40 to 50 mph.

* IMPACTS...Strong cross winds will make driving difficult, 
  especially for high profile vehicles on east-west oriented 
  roads. Use extra caution. Localized blowing dust is also 
  possible, reducing visibilities. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that sustained wind speeds of between
30 and 40 mph are expected, or wind gusts of between 40 and
58 mph. Winds this strong can make driving difficult, especially
for high profile vehicles. In addition, strong winds over desert
areas could result in briefly lowered visibilities to well under
a mile at times in blowing dust or blowing sand. Use extra
caution.

&&

$$
222 
WWUS75 KPSR 212058
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
158 PM MST Thu Dec 21 2017

AZZ552-556>558-560>562-212300-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
158 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-212300-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
158 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-212300-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
158 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ532-536-539-559-CAZ565-567-212300-
/O.CON.KPSR.DU.Y.0027.000000T0000Z-171222T0000Z/
Yuma-Gila River Valley-Gila Bend-Sonoran Desert Natl Monument-
Imperial County Southeast-Imperial Valley-
Including the cities of Yuma, Fortuna Foothills, Ligurta, 
Gila Bend, Sentinel, Winterhaven, El Centro, Calexico, Alamorio, 
and Brawley
158 PM MST Thu Dec 21 2017 /1258 PM PST Thu Dec 21 2017/

...BLOWING DUST ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST /4 PM
PST/ THIS AFTERNOON...

* AFFECTED AREA...Interstate 8 Corridor from Maricopa county 
  through portions of Southeast California. 

* TIMING...Now until late afternoon today.

* WINDS...Gusty northwest winds 30 mph.

* VISIBILITY...As low as one-half mile in localized dust 
  channels.

* IMPACTS...Strong northwest winds will lead to areas of blowing 
  dust or localized dust channels rapidly reducing roadway 
  visibilities along the highway corridor. Travel with caution. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be ready for a sudden drop in visibility. If you encounter
blowing dust or blowing sand on the roadway or see it
approaching, pull off the road as far as possible and put your
vehicle in park. Turn the lights all the way off and keep your
foot off the brake pedal.

Remember, pull aside, stay alive.

&&

$$

CAZ560-561-564-568>570-212300-
/O.CON.KPSR.WI.Y.0031.000000T0000Z-171221T2300Z/
Joshua Tree NP West-Joshua Tree NP East-Chuckwalla Mountains-
Chiriaco Summit-Palo Verde Valley-Chuckwalla Valley-
Including the cities of Cottonwood Visitor, 
Lost Horse-Keys Village, Imperial Hot Mineral Springs, 
Chiriaco Summit, Martinez Lake, Blythe, Palo Verde, Ripley, 
and Midland
1258 PM PST Thu Dec 21 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS
AFTERNOON...

* AFFECTED AREA...Portions of southeast California, including 
  Joshua Tree National Park and the Interstate 10 corridor. 

* TIMING...Wednesday evening through Thursday afternoon.

* WINDS...Northwest 20 to 30 mph. Gusts of 40 to 50 mph.

* IMPACTS...Strong cross winds will make driving difficult, 
  especially for high profile vehicles on east-west oriented 
  roads. Use extra caution. Localized blowing dust is also 
  possible, reducing visibilities. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that sustained wind speeds of between
30 and 40 mph are expected, or wind gusts of between 40 and
58 mph. Winds this strong can make driving difficult, especially
for high profile vehicles. In addition, strong winds over desert
areas could result in briefly lowered visibilities to well under
a mile at times in blowing dust or blowing sand. Use extra
caution.

&&

$$
581 
WWUS75 KPSR 212303
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
403 PM MST Thu Dec 21 2017

CAZ560-561-564-568>570-220015-
/O.EXP.KPSR.WI.Y.0031.000000T0000Z-171221T2300Z/
Joshua Tree NP West-Joshua Tree NP East-Chuckwalla Mountains-
Chiriaco Summit-Palo Verde Valley-Chuckwalla Valley-
Including the cities of Cottonwood Visitor, 
Lost Horse-Keys Village, Imperial Hot Mineral Springs, 
Chiriaco Summit, Martinez Lake, Blythe, Palo Verde, Ripley, 
and Midland
303 PM PST Thu Dec 21 2017

...WIND ADVISORY HAS EXPIRED...

Winds have weakened below Advisory levels and thus the Advisory
was allowed to expire. However, conditions will still be breezy to
windy from the north and motorists should still be prepared to use
extra caution due to more difficult handling. 

$$

AZZ552-556>558-560>562-221115-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
403 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-221115-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
403 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-221115-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
403 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ532-536-539-559-CAZ565-567-220015-
/O.CON.KPSR.DU.Y.0027.000000T0000Z-171222T0000Z/
Yuma-Gila River Valley-Gila Bend-Sonoran Desert Natl Monument-
Imperial County Southeast-Imperial Valley-
Including the cities of Yuma, Fortuna Foothills, Ligurta, 
Gila Bend, Sentinel, Winterhaven, El Centro, Calexico, Alamorio, 
and Brawley
403 PM MST Thu Dec 21 2017 /303 PM PST Thu Dec 21 2017/

...BLOWING DUST ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST /4 PM
PST/ THIS AFTERNOON...

* AFFECTED AREA...Interstate 8 Corridor from Maricopa county 
  through portions of Southeast California. 

* TIMING...Now until late afternoon today.

* WINDS...Gusty northwest winds 30 mph.

* VISIBILITY...As low as one-half mile in localized dust 
  channels. 

* IMPACTS...Strong northwest winds will lead to areas of blowing 
  dust or localized dust channels rapidly reducing roadway 
  visibilities along the highway corridor. Travel with caution. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be ready for a sudden drop in visibility. If you encounter
blowing dust or blowing sand on the roadway or see it
approaching, pull off the road as far as possible and put your
vehicle in park. Turn the lights all the way off and keep your
foot off the brake pedal.

Remember, pull aside, stay alive.

&&

$$
790 
WWUS75 KPSR 212315
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
415 PM MST Thu Dec 21 2017

...A FREEZE WARNING REMAINS IN AFFECT BEGINNING TONIGHT THROUGH FRIDAY
MORNING...

.A BLOWING DUST ADVISORY REMAINS IN AFFECT THROUGH 5PM MST ALONG
THE I-8 CORRIDEOR.

AZZ552-556>558-560>562-221030-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
415 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-221030-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
415 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-221030-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
415 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ532-536-539-559-CAZ565-567-220015-
/O.CON.KPSR.DU.Y.0027.000000T0000Z-171222T0000Z/
Yuma-Gila River Valley-Gila Bend-Sonoran Desert Natl Monument-
Imperial County Southeast-Imperial Valley-
Including the cities of Yuma, Fortuna Foothills, Ligurta, 
Gila Bend, Sentinel, Winterhaven, El Centro, Calexico, Alamorio, 
and Brawley
415 PM MST Thu Dec 21 2017 /315 PM PST Thu Dec 21 2017/

...BLOWING DUST ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST /4 PM
PST/ THIS AFTERNOON...

* AFFECTED AREA...Interstate 8 Corridor from Maricopa county 
  through portions of Southeast California. 

* TIMING...Now until late afternoon today.

* WINDS...Gusty northwest winds 30 mph.

* VISIBILITY...As low as one-half mile in localized dust 
  channels. 

* IMPACTS...Strong northwest winds will lead to areas of blowing 
  dust or localized dust channels rapidly reducing roadway 
  visibilities along the highway corridor. Travel with caution. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be ready for a sudden drop in visibility. If you encounter
blowing dust or blowing sand on the roadway or see it
approaching, pull off the road as far as possible and put your
vehicle in park. Turn the lights all the way off and keep your
foot off the brake pedal.

Remember, pull aside, stay alive.

&&

$$
199 
WWUS75 KPSR 212359
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
459 PM MST Thu Dec 21 2017

...A FREEZE WARNING REMAINS IN AFFECT BEGINNING TONIGHT THROUGH
FRIDAY MORNING...

.A BLOWING DUST ADVISORY WILL EXPIRE AT 5PM MST ALONG THE I-8 
CORRIDOR.

AZZ532-536-539-559-CAZ565-567-220100-
/O.EXP.KPSR.DU.Y.0027.000000T0000Z-171222T0000Z/
Yuma-Gila River Valley-Gila Bend-Sonoran Desert Natl Monument-
Imperial County Southeast-Imperial Valley-
Including the cities of Yuma, Fortuna Foothills, Ligurta, 
Gila Bend, Sentinel, Winterhaven, El Centro, Calexico, Alamorio, 
and Brawley
459 PM MST Thu Dec 21 2017 /359 PM PST Thu Dec 21 2017/

...BLOWING DUST ADVISORY WILL EXPIRE AT 5 PM MST /4 PM PST/ THIS
AFTERNOON...

WINDS CONTINUE TO DECREASE AND THE DUST ADVISORY WILL BE ALLOWED
TO EXPIRE.

$$

AZZ552-556>558-560>562-221030-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
459 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-221030-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
459 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-221030-
/O.CON.KPSR.FZ.W.0002.171222T0600Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
459 PM MST Thu Dec 21 2017

...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
9 AM MST FRIDAY...

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$
131 
WWUS75 KPSR 220714
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1214 AM MST Fri Dec 22 2017


AZZ552-556>558-560>562-221600-
/O.CON.KPSR.FZ.W.0002.000000T0000Z-171222T1600Z/
Superior-Tonto Basin-Mazatzal Mountains-
Pinal/Superstition Mountains-San Carlos-Dripping Springs-
Globe/Miami-
Including the cities of Superior, Punkin Center, Sunflower, 
San Carlos, Peridot, Hayden, Winkelman, Globe, and Miami
1214 AM MST Fri Dec 22 2017

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MST THIS MORNING...

* AFFECTED AREA...Portions of southern Gila County and extreme 
  northeastern Maricopa County. Affected communities include 
  Globe, Miami, Superior, Sunflower, and Winkelman. 

* TEMPERATURES...Lows falling into the 20s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ553-221600-
/O.CON.KPSR.FZ.W.0002.000000T0000Z-171222T1600Z/
Northwest Pinal County-
Including the cities of Casa Grande, Cactus Forest, Florence, 
and Coolidge
1214 AM MST Fri Dec 22 2017

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MST THIS MORNING...

* AFFECTED AREA...Northwest Pinal County including the 
  communities of Casa Grande, Coolidge, Florence, and Ak-Chin 
  Village. 

* TEMPERATURES...Ranging from the middle 20s to the low 30s.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

AZZ533-221600-
/O.CON.KPSR.FZ.W.0002.000000T0000Z-171222T1600Z/
Central La Paz-
Including the cities of Brenda, Harcuvar, Quartzsite, Vicksburg, 
Vicksburg Junction, and Salome
1214 AM MST Fri Dec 22 2017

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MST THIS MORNING...

* AFFECTED AREA...Much of La Paz County, including the 
  communities of Quartzsite, Bouse, and Wenden. Other affected 
  areas include locations along Interstate 10, and Highways 72 
  and 95. 

* TEMPERATURES...Mid to upper 20s for the coldest locations.

* IMPACTS...Freezing/sub-freezing temperatures may cause damage 
  to sensitive plants and ornamental vegetation. Poorly 
  insulated pipes may burst. The extreme cold is also dangerous 
  for any pets left outdoors overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will destroy or damage crops and
other sensitive vegetation.

&&

$$

What forecasters said that day

The local office's own words before this freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Phoenix, AZ wrote its last area forecast discussion before this freeze warning went out at Dec 20, 3:39 AM MST, 10 hours 43 minutes earlier.

Area forecast discussion, Dec 20, 3:39 AM MST, 10 hours 43 minutes before
Area Forecast Discussion
National Weather Service Phoenix AZ
339 AM MST Wed Dec 20 2017

.SYNOPSIS...
Slightly above normal temperatures are forecast today before a
cold front moves through the region late Wednesday and Thursday,
with strong winds developing across southeast California. Much
cooler temperatures are expected area-wide Thursday and Friday. A
warming trend will occur through the weekend as high pressure
rebuilds over the Pacific Coast.

&&

.DISCUSSION...
A upper trough over the Pacific Northwest is becoming better
defined in satellite imagery over the past several hours,
exhibiting evidence of low-topped convection amidst cold
temperatures aloft. This feature will continue to dig
southeastward across the northern Rockies into the Great Basin
today, and will be the primary driver of changing weather
conditions across the Southwest. Cool conditions overnight will
give way to a pleasant day region-wide, with slightly above
normal temperatures expected today.

A cold front is forecast to enter southeast California this
evening, and quickly sweep southeastward. A modest increase in
west-southwesterly winds will occur ahead of the cold front, with
a more significant strengthening of winds forecast to occur in
the wake of the cold front overnight. The strongest winds are
forecast to occur across higher elevation locations and ridgetops
over southeast California, amidst strong northerly flow above the
surface (e.g., 850-mb winds around 40 kt). Winds will gradually
weaken throughout the day Thursday, but will remain locally strong
into the afternoon. As such, a Wind Advisory will be maintained
for much of southeast California. Areas of blowing sand/dust will
also be possible.

Moisture will be limited area-wide with this system, with only a
slight chance of showers possible late tonight across Joshua Tree
National Park. Otherwise, the other big weather impact will be the
much cooler temperatures spreading across the region in the wake
of the cold front. The current forecast continues to support
below-normal temperatures both Thursday and Friday, with some
lower desert locations struggling to get out of the 50s during
peak heating. The coldest temperatures of the season so far are
expected Friday morning, with 20s across the higher terrain and
even some outlying areas, and 30s across the remainder of the
lower deserts. The Freeze Watch has been maintained across parts
of southern Gila, Pinal, and La Paz Counties for Friday morning.

A gradual warming trend will begin Saturday through early next
week as upper ridging expands eastward. Model solutions have
finally converged on a similar solution, so looks like the
previously anticipated stretch of a more prolonged period of cool
temperatures will not materialize. Temperatures should return to
the low 70s by early next week, while rainfall potential remains
low. More significant discrepancies in the pattern evolution
develop by the middle of next week, with the potential for another
storm system affecting the western CONUS. However, overall
confidence in any scenario remains low.

&&

.AVIATION... South-Central Arizona including KPHX, KIWA, and KSDL:
Light easterly flow will continue today and may only briefly become
southwest for a few hours this afternoon.  An approaching weather
system will then switch easterly evening winds around to the west
late Wednesday/early Thursday and will persist through the day on
Thursday. The terminals will remain dry.

California/Southwest Arizona including KIPL and KBLH: Very light
winds through Wednesday morning will eventually become southerly,
then westerly into Wednesday evening. Greater aviation concerns
exists Wednesday night as a cold front moves through the terminals
bringing gusty northwest winds. There is the possibility of reduced
visibilities caused by blowing dust and sand Wednesday night through
Thursday but confidence is not high enough to include it in the TAFs
at this point.

Aviation Discussion not updated for amended TAFs.

&&

.FIRE WEATHER...
Friday through Tuesday... Winds across SE California weaken
dramatically on Friday as a dry weather system exits our area.  Wind
speeds look to stay relatively light through early Saturday before
another round of breezy north winds take place Saturday night and
into Sunday across SE California and the Lower Colorado River
Valley. Temperatures steadily rise through early next week with
above normal high temperatures returning on Monday. Afternoon
humidity minimums and overnight recoveries will generally be poor as
dry air remains in place.

&&

.SPOTTER INFORMATION STATEMENT...
Spotters should follow standard reporting procedures.

&&

.PSR WATCHES/WARNINGS/ADVISORIES...
AZ...Freeze Watch from Thursday evening through Friday morning for
     AZZ533-552-553-556>558-560>562.

CA...Wind Advisory from 7 PM this evening to 3 PM PST Thursday for
     CAZ560-561-564-568>570.

     Wind Advisory from 4 PM this afternoon to 10 PM PST this evening
     for CAZ562.

&&

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DISCUSSION...Rogers
AVIATION...Wilson
FIRE WEATHER...Wilson

Nearby

Freeze Warnings in Arizona, 2017Every freeze warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.