Flash Flood Warning 138, NWS Tucson, AZ

Issued

Aug 16, 2021, 8:51 PM MST (03:51 UTC)

Expired

Aug 17, 2021, 12:00 AM MST

In force

3 hr

Issued by

NWS Tucson, AZ

Area

Storm-based polygon

Damage threat

Considerable

Flood severity

None

County Pima County, AZ

The Phoenix radar (KIWA), 112 km from the middle of the area, began a volume at 03:53 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.

528 
WGUS55 KTWC 170351
FFWTWC
AZC019-170700-
/O.NEW.KTWC.FF.W.0138.210817T0351Z-210817T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Tucson has issued a

* Flash Flood Warning for...
  Northwestern Pima County in southeastern Arizona...

* Until midnight MST.

* At 851 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3.5 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.

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

* Some locations that will experience flash flooding include...
  mainly rural areas of Northwestern Pima County

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.

Be aware of your surroundings and do not drive on flooded roads.

Remain alert for flooding even in locations not receiving rain. 
Washes, streams, and rivers can become raging killer currents in a 
matter of minutes, even from distant rainfall.

&&

LAT...LON 3251 11227 3238 11238 3244 11249 3251 11248
      3251 11242 3251 11241 3251 11238

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

$$

RH

375 
WGUS75 KTWC 170700
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
1200 AM MST Tue Aug 17 2021

AZC019-170710-
/O.EXP.KTWC.FF.W.0138.000000T0000Z-210817T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
1200 AM MST Tue Aug 17 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHWESTERN PIMA COUNTY...

The heavy rain has ended. Flash flooding is no longer expected to 
pose a threat. Please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 200 AM MST for a portion 
of Southeast Arizona.

LAT...LON 3251 11227 3238 11238 3244 11249 3251 11248
      3251 11242 3251 11241 3251 11238

$$

GZ

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.