Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 68, NWS Tucson, AZ

July 25, 2021Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 25, 2021, 10:31 AM MST for Pima County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 25, 2021, 10:31 AM MST (17:31 UTC)
Expired: Jul 25, 2021, 1:30 PM MST
In force: 3 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 28 km from the middle of the area, began a volume at 17:30 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 (KTUS), launched 12:00Z, 5.5 hours before the alert went out and 13 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 151 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 521 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

947 
WGUS55 KTWC 251731
FFWTWC
AZC019-252030-
/O.NEW.KTWC.FF.W.0068.210725T1731Z-210725T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
1031 AM MST Sun Jul 25 2021

The National Weather Service in Tucson has issued a

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

* Until 130 PM MST.

* At 1031 AM MST, Doppler radar and automated rain gauges indicated 
  heavy rain falling across the warned area. Between 1 and 3 inches 
  of rain have fallen. Flash flooding is ongoing or expected to 
  begin shortly.

  HAZARD...Flash flooding caused by heavy rain.

  SOURCE...Radar and automated gauges.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Southeast and east Tucson, Vail, Saguaro National Park East and 
  Rita Ranch.

This includes the following Flash Flood Prone Locations...
Old Spanish Trail at Rincon Creek, Camino Loma Alta at Rincon Creek 
and Old Spanish Trail at Jeremy Wash.

This includes the following streams and drainages...
  Cienega Creek, Rincon Creek, Tanque Verde Wash, Agua Verde Creek, 
  Coyote Wash and Pantano Wash.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3211 11093 3203 11083 3202 11061 3213 11067
      3222 11070 3215 11081

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

WJM

2 follow-up statements

224 
WGUS75 KTWC 251947
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
1247 PM MST Sun Jul 25 2021

AZC019-252030-
/O.CON.KTWC.FF.W.0068.000000T0000Z-210725T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
1247 PM MST Sun Jul 25 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM MST THIS 
AFTERNOON FOR EASTERN PIMA COUNTY...

At 1247 PM MST, AT 12:40 PM MST light to moderate rain continued 
across the warned area. Between 1 and 3 inches of rain have fallen. 
Significant rises have been noted in area washes. After cresting 
over 13 feet, Pantan Wash near Vail is down to 10 feet. Rincon Creek 
was projected near 8 feet. Downstream, Pantano Wash near Broadway 
was near 8 feet and climbing.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Radar and automated gauges.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Southeast and east Tucson, Vail, Saguaro National Park East and 
  Rita Ranch.

This includes the following Flash Flood Prone Locations...
Old Spanish Trail at Rincon Creek, Camino Loma Alta at Rincon Creek 
and Old Spanish Trail at Jeremy Wash.

This includes the following streams and drainages...
  Cienega Creek, Rincon Creek, Tanque Verde Wash, Agua Verde Creek, 
  Coyote Wash and Pantano Wash.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3211 11093 3203 11083 3202 11061 3213 11067
      3222 11070 3215 11081

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

WJM

012 
WGUS75 KTWC 252032
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
132 PM MST Sun Jul 25 2021

AZC019-252042-
/O.EXP.KTWC.FF.W.0068.000000T0000Z-210725T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pima AZ-
132 PM MST Sun Jul 25 2021

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

Rainfall continues to diminish, however elevated flow will continue 
in streams and washes. Please continue to heed remaining road 
closures.

A Flash Flood Watch remains in effect until 1200 AM MST Monday for a 
portion of Southeast Arizona.

LAT...LON 3211 11093 3203 11083 3202 11061 3213 11067
      3222 11070 3215 11081

$$

WJM

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 9:25 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Jul 24, 9:51 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 24, 9:58 PM MST	Areal Flood Advisory	TWC	Cochise, Pima	3 hr
Jul 25, 12:53 AM MST	Areal Flood Warning	TWC	Pima	8 hr
Jul 25, 3:14 AM MST	Areal Flood Warning	TWC	Pima	3 hr
Jul 25, 3:25 AM MST	Areal Flood Warning	TWC	Pima	6 hr
Jul 25, 4:15 AM MST	Areal Flood Advisory	TWC	Pima, Pinal	5 hr
Jul 25, 6:27 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	4 hr
Jul 25, 8:52 AM MST	Areal Flood Warning	TWC	Pima	9 hr
Jul 25, 9:09 AM MST	Areal Flood Advisory	TWC	Cochise, Pima, Pinal	7 hr
Jul 25, 9:24 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pinal	3 hr
Jul 25, 9:53 AM MST	Areal Flood Warning	TWC	Pima	6 hr
Jul 25, 9:55 AM MST	Flash Flood Warning	TWC	Pima	3 hr
Jul 25, 10:22 AM MST	Areal Flood Warning	TWC	Pima, Pinal	6 hr
Jul 25, 11:39 AM MST	Areal Flood Advisory	TWC	Santa Cruz	4 hr
Jul 25, 1:36 PM MST	Flash Flood Warning	TWC	Pima	114 min
Jul 25, 1:42 PM MST	Special Weather Statement	TWC		63 min
Jul 25, 2:00 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Jul 25, 3:07 PM MST	Areal Flood Warning	TWC	Santa Cruz	12 hr
Jul 25, 3:34 PM MST	Areal Flood Advisory	TWC	Pima	116 min
Jul 25, 4:15 PM MST	Areal Flood Warning	TWC	Pima, Pinal	43 hr
Jul 25, 4:49 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr

Nearby

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

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.