Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 15, NWS Tucson, AZ

July 10, 2021Cochise County, Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 10, 2021, 7:29 PM MST for Cochise County, Pima County, Arizona. It was in force for 2 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 10, 2021, 7:29 PM MST (02:29 UTC)
Expired
Jul 10, 2021, 9:52 PM MST
In force
2 hr
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

Counties Cochise County, AZ, Pima County, AZ

The radar

The Tucson radar (KEMX), 31 km from the middle of the area, began a volume at 02:32 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 00:00Z, 2.5 hours before the alert went out and 35 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-pSkew-T log-p diagram, Tuscon, AZ at 00:00Z on 2021-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1025 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 00:00Z on 2021-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1025 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
3304 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

725 
WGUS55 KTWC 110229
FFWTWC
AZC003-019-110500-
/O.NEW.KTWC.FF.W.0015.210711T0229Z-210711T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
729 PM MST Sat Jul 10 2021

The National Weather Service in Tucson has issued a

* Flash Flood Warning for...
  West Central Cochise County in southeastern Arizona...
  East Central Pima County in southeastern Arizona...

* Until 1000 PM MST.

* At 729 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Saguaro National Park East and Cascabel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3211 11066 3232 11067 3229 11028 3198 11035

FLASH FLOOD...RADAR INDICATED

$$

JD
1 follow-up statement
921 
WGUS75 KTWC 110452
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
952 PM MST Sat Jul 10 2021

AZC003-019-110502-
/O.CAN.KTWC.FF.W.0015.000000T0000Z-210711T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-Pima AZ-
952 PM MST Sat Jul 10 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 10 PM MST FOR WEST CENTRAL 
COCHISE AND EAST CENTRAL PIMA 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 3211 11066 3232 11067 3229 11028 3198 11035

$$

JD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 5:10 PM MSTFlash Flood WarningTWCCochise2 hr
Jul 10, 5:14 PM MSTSevere Thunderstorm WarningTWCCochise, Graham61 min
Jul 10, 5:15 PM MSTSevere Thunderstorm WarningTWCCochise45 min
Jul 10, 5:23 PM MSTSevere Thunderstorm WarningTWCSanta Cruz52 min
Jul 10, 5:30 PM MSTSevere Thunderstorm WarningTWCCochise60 min
Jul 10, 5:42 PM MSTFlash Flood WarningTWCSanta Cruz2 hr
Jul 10, 5:46 PM MSTSevere Thunderstorm WarningTWCCochise, Pima, Santa Cruz59 min
Jul 10, 6:05 PM MSTSevere Thunderstorm WarningTWCSanta Cruz40 min
Jul 10, 6:13 PM MSTSevere Thunderstorm WarningTWCCochise, Graham26 min
Jul 10, 6:22 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz53 min
Jul 10, 6:50 PM MSTSpecial Weather StatementTWC25 min
Jul 10, 6:57 PM MSTDust Storm WarningTWCPima, Santa Cruz63 min
Jul 10, 6:57 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz48 min
Jul 10, 7:06 PM MSTSevere Thunderstorm WarningTWCCochise, Pima39 min
Jul 10, 7:07 PM MSTDust Storm WarningTWCPima, Pinal83 min
Jul 10, 7:14 PM MSTSevere Thunderstorm WarningTWCPima61 min
Jul 10, 7:35 PM MSTSevere Thunderstorm WarningTWCCochise, Pima55 min
Jul 10, 8:00 PM MSTDust Storm WarningTWCPima, Pinal86 min
Jul 10, 8:06 PM MSTSevere Thunderstorm WarningTWCPima39 min
Jul 10, 8:12 PM MSTSevere Thunderstorm WarningTWCPima48 min
Jul 10, 8:22 PM MSTFlash Flood WarningTWCPima113 min
Jul 10, 8:29 PM MSTSevere Thunderstorm WarningTWCPima61 min
Jul 10, 8:40 PM MSTSevere Thunderstorm WarningTWCPima, Pinal66 min
Jul 10, 8:41 PM MSTFlash Flood WarningTWCPima2 hr
Jul 10, 8:48 PM MSTAreal Flood AdvisoryTWCPima117 min
Jul 10, 8:51 PM MSTAreal Flood AdvisoryTWCPima114 min
Jul 10, 8:51 PM MSTTornado WarningTWCPima14 min
Jul 10, 9:45 PM MSTSpecial Weather StatementTWC60 min
Jul 10, 10:03 PM MSTSevere Thunderstorm WarningTWCPima42 min
Jul 10, 10:20 PM MSTAreal Flood AdvisoryTWCPima, Pinal3 hr
Jul 10, 10:36 PM MSTAreal Flood AdvisoryTWCPima3 hr
Jul 11, 4:12 PM MSTSpecial Weather StatementTWCGreenlee33 min
Jul 11, 4:44 PM MSTSpecial Weather StatementTWCGreenlee46 min

Nearby

Flash Flood Warnings in Arizona, 2021Every 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.