Flash Flood Warning 177, NWS Phoenix, AZ

Issued

Aug 14, 2021, 12:53 AM MST (07:53 UTC)

Expired

Aug 14, 2021, 5:00 AM MST

In force

4 hr

Issued by

NWS Phoenix, AZ

Area

Storm-based polygon

Damage threat

Considerable

Flood severity

None

County Maricopa County, AZ

The Phoenix radar (KIWA), 79 km from the middle of the area, began a volume at 07:52 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

611 
WGUS55 KPSR 140753
FFWPSR
AZC013-141200-
/O.NEW.KPSR.FF.W.0177.210814T0753Z-210814T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
1253 AM MST Sat Aug 14 2021

The National Weather Service in Phoenix has issued a

* Flash Flood Warning for...
  Maricopa County in south central Arizona...

* Until 500 AM MST.

* At 1253 AM MST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.5 and 1.5 inches of 
  rain have fallen. Additional rainfall amounts up to 1 inch 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...
  Gila Bend, Estrella, Sonoran National Monument, Bosque and Mobile.

This includes the following highways...
	AZ Route 238 between mile markers 10 and 19.
	AZ Interstate 8 between mile markers 124 and 132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3303 11251 3309 11231 3308 11223 3306 11221
      3296 11224 3293 11226 3292 11229 3291 11235
      3288 11241 3288 11247 3290 11259 3295 11267
      3296 11267 3298 11264

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Iniguez

422 
WGUS75 KPSR 140915 RRA
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
215 AM MST Sat Aug 14 2021

AZC013-141200-
/O.CON.KPSR.FF.W.0177.000000T0000Z-210814T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Maricopa AZ-
215 AM MST Sat Aug 14 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 AM MST EARLY THIS 
MORNING FOR MARICOPA COUNTY...

At 215 AM MST, Doppler radar and automated rain gauges indicated 
between 1 and 3 inches of rain have fallen. Flash flooding is 
ongoing or expected to begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar and automated gauges.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Gila Bend, Estrella, Sonoran National Monument, Bosque and Mobile.

This includes the following highways...
	AZ Route 238 between mile markers 10 and 19.
	AZ Interstate 8 between mile markers 124 and 132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3303 11251 3309 11231 3308 11223 3306 11221
      3296 11224 3293 11226 3292 11229 3291 11235
      3288 11241 3288 11247 3290 11259 3295 11267
      3296 11267 3298 11264

FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Iniguez

986 
WGUS75 KPSR 141157
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
457 AM MST Sat Aug 14 2021

AZC013-141207-
/O.EXP.KPSR.FF.W.0177.000000T0000Z-210814T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Maricopa AZ-
457 AM MST Sat Aug 14 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 5 AM MST EARLY THIS MORNING 
FOR MARICOPA COUNTY...

Flood waters are receding. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

A Flash Flood Watch remains in effect until 500 PM MST Sunday for a 
portion of south central Arizona.

LAT...LON 3303 11251 3309 11231 3308 11223 3306 11221
      3296 11224 3293 11226 3292 11229 3291 11235
      3288 11241 3288 11247 3290 11259 3295 11267
      3296 11267 3298 11264

$$

CK

Flash Flood Warnings in Arizona, 2021Every flash flood warning in 2021

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