Weather Alerts for Maricopa County

Issued by the National Weather Service

Severe Thunderstorm Warning  SEVERE THUNDERSTORM WARNING   Severe Thunderstorm Warning
MARICOPA COUNTY

Areas Affected:
Maricopa - Pinal
Effective: Sat, 9/18 3:00pm Updated: Sat, 9/18 3:10pm Urgency: Immediate
Expires: Sat, 9/18 3:45pm Severity:  Severe  Certainty: Observed

 
Details:
The National Weather Service in Phoenix has issued a
* Severe Thunderstorm Warning for...
Maricopa County in south central Arizona...
Pinal County in southeastern Arizona...
* Until 345 PM MST.
* At 300 PM MST, a severe thunderstorm was located near Maricopa, or
11 miles southwest of Sun Lakes, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Chandler, Gilbert, Sun Lakes, Maricopa, Queen Creek, Chandler
Heights, Gilbert City Hall, Tumbleweed Park, Chandler City Hall,
San Tan Village Mall, Seville, Bapchule, Estrella Sailport, Olberg
and Phoenix Mesa Gateway Airport.
This includes the following highways...
AZ Interstate 10 between mile markers 164 and 181.
AZ Route 87 between mile markers 149 and 166.
AZ Route 202 between mile markers 39 and 50.
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

Information:
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature`s leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

Flash Flood Warning  FLASH FLOOD WARNING   Flash Flood Warning
MARICOPA COUNTY

Areas Affected:
Maricopa - Pinal
Effective: Sat, 9/18 1:35pm Updated: Sat, 9/18 3:10pm Urgency: Immediate
Expires: Sat, 9/18 4:45pm Severity:  Severe  Certainty: Likely

 
Details:
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MST THIS
AFTERNOON FOR MARICOPA AND PINAL COUNTIES...
At 135 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.5 and 1.25 inches of rain
have fallen. Additional rainfall amounts up to 0.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Estrella, Sonoran National Monument, Estrella Sailport, Bosque and
Mobile.
This includes the following highways...
AZ Route 238 between mile markers 10 and 19.
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

Information:
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Flood Advisory  FLOOD ADVISORY   Flood Advisory
MARICOPA COUNTY

Areas Affected:
Maricopa
Effective: Sat, 9/18 1:35pm Updated: Sat, 9/18 3:10pm Urgency: Expected
Expires: Sat, 9/18 4:45pm Severity: Minor Certainty: Likely

 
Details:
The National Weather Service in Phoenix has issued a
* Flood Advisory for...
Maricopa County in south central Arizona...
* Until 345 PM MST.
* At 146 PM MST, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1 inch of rain has
fallen.
* Some locations that will experience flooding include...
Surprise and Wittmann.
Additional rainfall amounts up to 0.5 inches are expected over the
area. This additional rain will result in minor flooding.

Information:
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Flood Advisory  FLOOD ADVISORY   Flood Advisory
MARICOPA COUNTY

Areas Affected:
Maricopa
Effective: Sat, 9/18 1:35pm Updated: Sat, 9/18 3:10pm Urgency: Expected
Expires: Sat, 9/18 4:45pm Severity: Minor Certainty: Likely

 
Details:
The National Weather Service in Phoenix has issued a
* Flood Advisory for...
Maricopa County in south central Arizona...
* Until 315 PM MST.
* At 111 PM MST, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 0.75 inches of rain
have fallen.
* Some locations that will experience flooding include...
Avondale, Goodyear and Cashion.

Information:
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Dust Advisory  DUST ADVISORY   Dust Advisory
MARICOPA COUNTY

Areas Affected:
Maricopa - Pinal
Effective: Sat, 9/18 2:54pm Updated: Sat, 9/18 3:10pm Urgency: Expected
Expires: Sat, 9/18 4:00pm Severity:  Moderate  Certainty: Likely

 
Details:
The National Weather Service in Phoenix has issued a
* Dust Advisory for...
Maricopa County in south central Arizona...
Pinal County in southeastern Arizona...
* Until 400 PM MST.
* At 254 PM MST, a wall of dust was along a line extending from near
Estrella Sailport to near Maricopa to 12 miles west of Casa Grande,
moving northeast at 40 mph.
HAZARD...Less than one mile visibility with strong wind in excess
of 50 mph.
SOURCE...Public.
IMPACT...Hazardous travel.
* This includes the following highways...
AZ Interstate 10 between mile markers 158 and 192.
AZ Interstate 8 between mile markers 152 and 164.
US Highway 60 between mile markers 203 and 209.
Locations impacted include...
Mesa, Chandler, Gilbert, Tempe, Casa Grande, Florence, Coolidge, Sun
Lakes, Maricopa, Queen Creek, San Tan Village Mall, San Tan Valley,
Seville, South Mountain Park and Bapchule.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Blowing dust brings reduced visibility, leading to dangerous driving
conditions. If driving, avoid blowing dust if possible. If caught in
dense blowing dust, pull off the road, turn off your lights and keep
your foot off the brake.
Motorists should not drive into an area of blowing dust. PULL ASIDE
STAY ALIVE!

Special Weather Statement  SPECIAL WEATHER STATEMENT   Special Weather Statement
MARICOPA COUNTY

Areas Affected:
Northwest Pinal County - Sonoran Desert Natl Monument - West Pinal County
Effective: Sat, 9/18 3:00pm Updated: Sat, 9/18 3:10pm Urgency: Expected
Expires: Sat, 9/18 3:30pm Severity: Minor Certainty: Observed

 
Details:
...A strong thunderstorm will impact portions of Maricopa and Pinal
Counties through 330 PM MST...
At 245 PM MST, Doppler radar was tracking a strong thunderstorm near
Maricopa, or 21 miles southwest of Sun Lakes, moving northeast at 25
mph.
HAZARD...Winds in excess of 40 mph, pea size hail, and blowing dust.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Casa Grande, Maricopa, Estrella Sailport, Olberg, Stanfield, Ak-
Chin Village and Mobile.
This includes the following highways...
AZ Interstate 10 between mile markers 180 and 185.
AZ Interstate 8 between mile markers 144 and 163.
AZ Route 238 between mile markers 30 and 44.
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Information:
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.