Flash Flood Warning 191, NWS Phoenix, AZ

Issued

Aug 16, 2021, 10:48 PM MST (05:48 UTC)

Expired

Aug 17, 2021, 7:33 AM MST

In force

9 hr

Issued by

NWS Phoenix, AZ

Area

Storm-based polygon

Damage threat

Considerable

Flood severity

None

Counties Maricopa County, AZ, Pinal County, AZ

The Phoenix radar (KIWA), 33 km from the middle of the area, began a volume at 05:50 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.

089 
WGUS55 KPSR 170548
FFWPSR
AZC013-021-171345-
/O.NEW.KPSR.FF.W.0191.210817T0548Z-210817T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
1048 PM MST Mon Aug 16 2021

The National Weather Service in Phoenix has issued a

* Flash Flood Warning for...
  The Sawtooth burn scar in...
  Maricopa County in south central Arizona...
  Pinal County in southeastern Arizona...

* Until 645 AM MST Tuesday.

* At 1048 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain over the Sawtooth and Superstition Burn Scars. Between 
  0.5 and 1.5 inches of rain have fallen. Additional rainfall 
  amounts of 0.5 to 1 inch are possible in the warned area. Flash 
  flooding is ongoing or expected to begin shortly.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Sawtooth. The debris flow can consist of rock, 
mud, vegetation and other loose materials.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding in and around the Sawtooth
           and Superstition Burn Scars.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of areas in and around
           the Sawtooth Burn Scar.

* Some locations that will experience flash flooding include...
  Gold Canyon, Kings Ranch, Gold Camp and Superstition Mountains.

This includes the following highways...
	US Highway 60 between mile markers 202 and 208...and
	near mile marker 209.

This includes the following streams and drainages...
  Barge Creek, La, First Water Creek and Tortilla Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause 
extensive and severe flash flooding of creeks...streams...and 
ditches in the Sawtooth and Superstition Burn Scars. Severe debris 
flows can also be anticipated across roads. Roads and driveways may 
be washed away in places. If you encounter flood waters...climb to 
safety.

Move away from recently burned areas. Life-threatening flooding of 
creeks, roads and normally dry arroyos is likely. The heavy rains 
will likely trigger rockslides, mudslides and debris flows in steep 
terrain, especially in and around these areas.

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

&&

LAT...LON 3348 11136 3348 11132 3348 11131 3345 11125
      3345 11124 3343 11124 3340 11124 3336 11127
      3330 11132 3327 11139 3327 11144 3331 11148
      3340 11147 3344 11144

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

$$

Hirsch

985 
WGUS55 KPSR 171253
FFWPSR
AZC013-021-171545-
/O.EXT.KPSR.FF.W.0191.000000T0000Z-210817T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
553 AM MST Tue Aug 17 2021

The National Weather Service in Phoenix has extended the

* Flash Flood Warning for...
  The Sawtooth burn scar in...
  Maricopa County in south central Arizona...
  Pinal County in southeastern Arizona...

* Until 845 AM MST.

* At 553 AM MST, Doppler radar indicated thunderstorms producing 
  heavy rain over the Sawtooth Burn Scar. Between 1 and 2.5 inches 
  of rain have fallen. Flash flooding is ongoing or expected to 
  begin shortly.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Sawtooth. The debris flow can consist of rock, 
mud, vegetation and other loose materials.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding in and around the Sawtooth
           Burn Scar.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of areas in and around
           the Sawtooth Burn Scar.

* Some locations that will experience flash flooding include...
  Gold Canyon, Kings Ranch, Gold Camp and Superstition Mountains.

This includes the following highways...
	US Highway 60 between mile markers 202 and 208...and
	near mile marker 209.

This includes the following streams and drainages...
  Barge Creek, La, First Water Creek and Tortilla Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause 
extensive and severe flash flooding of creeks...streams...and 
ditches in the Sawtooth Burn Scar. Severe debris flows can also be 
anticipated across roads. Roads and driveways may be washed away in 
places. If you encounter flood waters...climb to safety.

Move away from recently burned areas. Life-threatening flooding of 
creeks, roads and normally dry arroyos is likely. The heavy rains 
will likely trigger rockslides, mudslides and debris flows in steep 
terrain, especially in and around these areas.

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

&&

LAT...LON 3348 11136 3348 11132 3348 11131 3345 11125
      3345 11124 3343 11124 3340 11124 3336 11127
      3330 11132 3327 11139 3327 11144 3331 11148
      3340 11147 3344 11144

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

$$

Hirsch

228 
WGUS75 KPSR 171433
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
733 AM MST Tue Aug 17 2021

AZC013-021-171443-
/O.CAN.KPSR.FF.W.0191.000000T0000Z-210817T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Maricopa AZ-Pinal AZ-
733 AM MST Tue Aug 17 2021

...FLASH FLOOD WARNING FOR THE SAWTOOTH BURN SCAR IS CANCELLED FOR 
MARICOPA AND PINAL COUNTIES...

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

LAT...LON 3348 11136 3348 11132 3348 11131 3345 11125
      3345 11124 3343 11124 3340 11124 3336 11127
      3330 11132 3327 11139 3327 11144 3331 11148
      3340 11147 3344 11144

$$

Hirsch

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.