Flash Flood Warning 82, NWS Tucson, AZ

157 
WGUS75 KTWC 122236
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
336 PM MST Fri Aug 12 2022

AZC021-130000-
/O.CON.KTWC.FF.W.0082.000000T0000Z-220813T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pinal AZ-
336 PM MST Fri Aug 12 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS 
AFTERNOON FOR SOUTHWESTERN PINAL COUNTY...

At 336 PM MST, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. 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.

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

Some locations that will experience flash flooding include...
  Chui-Chu, Cockleburr, Jack Rabbit, Shopishk and East Chui-Chu.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3274 11168 3272 11168 3267 11170 3261 11169
      3258 11174 3260 11188 3270 11194 3277 11195
      3277 11188 3279 11188 3279 11177 3276 11178
      3276 11174 3273 11174

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

$$

TGD

771 
WGUS75 KTWC 122358
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
458 PM MST Fri Aug 12 2022

AZC021-130008-
/O.EXP.KTWC.FF.W.0082.000000T0000Z-220813T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pinal AZ-
458 PM MST Fri Aug 12 2022

...FLASH FLOOD WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR 
SOUTHWESTERN PINAL COUNTY...

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

LAT...LON 3274 11168 3272 11168 3267 11170 3261 11169
      3258 11174 3260 11188 3270 11194 3277 11195
      3277 11188 3279 11188 3279 11177 3276 11178
      3276 11174 3273 11174

$$

TGD

Area Forecast Discussion
National Weather Service Tucson AZ
113 PM MST Fri Aug 12 2022

.SYNOPSIS...A favorable pattern remains in place for a daily
chance of showers and thunderstorms into next week. High
temperatures will top out right around to slightly below
normal levels.

&&

.DISCUSSION...Convection started early across southeast Arizona
today, with the first cells on radar over Mount Graham and Mount
Lemmon around 0945. Since then additional thunderstorm development
has occurred primarily across the western half of southeast Arizona
(mainly Tucson westward), where scattered showers and thunderstorms
were noted attm. Isolated showers and thunderstorms were currently
across Cochise, Graham and Greenlee counties. The morning KTWC
220812/12 raob indicated favorable conditions for thunderstorm
development today, with an MUCAPE of 1383 J/KG; a PWAT of 1.65 and
unstable conditions through the boundary layer. The main threat will
be heavy rainfall/flash flooding, although a few of the stronger
storms will be capable of strong wind gusts to 50+ mph and small
hail. The steering flow is from the southeast with thunderstorm
motion expected to be to the northwest at 10-15 mph. Expect showers
and thunderstorms to continue into the late evening hours tonight
before diminishing.

Otherwise, high pressure aloft currently centered over eastern
Colorado will move slowly south/southeast into the Texas panhandle
by late early next week. This keeps southeast Arizona in a favorable
southeast flow pattern through this period, with the daily threat of
thunderstorms, at times persisting well into the evening hours. The
model guidance indicates PW's to remain near to above normal through
this period, with values between 1.0 and 1.5 inches across the
eastern half of the forecast area and 1.5 and 2.0 inches across the
western portion of the CWA. Precipitation chances remain above
climatology through this period. The main threat will be flash
flooding and WPC has portions of our forecast area in a slight risk
of excessive rainfall.

Early to mid next week the monsoonal ridge shifts west/northwest
with the center of the high consolidating between the Four Corners
and northern Utah. Both ensemble and deterministic model guidance
indicate an easterly wave/inverted trough pushing westward under the
high and across the southwestern United States late Tuesday through
Thursday of next week. This feature will provide some extra dynamics
to an already moist atmosphere. The potential is there for southeast
Arizona to see some 'big days', with a more widespread flash
flooding risk if this scenario plays out. Stay tuned.

&&

.AVIATION...Valid through 14/00Z.
Isolated to scattered SHRA/TSRA through the afternoon before
beginning a dissipating trend after 13/04z. With any storms at or
near the terminals, strong wind gusts in excess of 40 kts, cloud
heights dropping to 6k-8k ft AGL, and visibility reductions will be
possible for a brief time. Outside of storms, winds will remain
around 10 kts or less. Cloud decks will rise up and slowly dissipate
after 13/06z to FEW-SCT AOA 18-20k ft AGL. Aviation discussion not
updated for TAF amendments.

&&

.FIRE WEATHER...An active monsoon period is expected to continue
into early next week, with daily rounds of scattered showers and
thunderstorms. The typical threats of strong gusty winds and heavy
rainfall remain, as well as the potential for precipitation outside
the normal afternoon/evening cycles. Wind trends are otherwise light
following a diurnal pattern.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...None.

&&

Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson

Special Weather Statement
National Weather Service Tucson AZ
1041 AM MST Fri Aug 12 2022

AZZ504-506-507-514-121830-
Santa Catalina and Rincon Mountains including Mount
Lemmon/Summerhaven-Upper San Pedro River Valley including Sierra
Vista/Benson-Southeast Pinal County including
Kearny/Mammoth/Oracle-Tucson Metro Area including Tucson/Green
Valley/Marana/Vail-
1041 AM MST Fri Aug 12 2022

...A strong thunderstorm will impact portions of northeastern Pima
and southern Pinal Counties through 1130 AM MST...

At 1040 AM MST, Doppler radar was tracking a strong thunderstorm over
Mount Lemmon/Summerhaven, or 9 miles southeast of Catalina. This
storm was nearly stationary.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Catalina, Mount Lemmon/Summerhaven and Seven Falls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3231 11077 3237 11086 3248 11088 3258 11082
      3251 11067 3238 11061
TIME...MOT...LOC 1740Z 152DEG 2KT 3242 11076

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

GLZ

Special Weather Statement
National Weather Service Tucson AZ
111 PM MST Fri Aug 12 2022

AZZ505-122100-
South Central Pinal County including Eloy/Picacho Peak State Park-
111 PM MST Fri Aug 12 2022

...A strong thunderstorm will impact portions of south central Pinal
County through 200 PM MST...

At 111 PM MST, Doppler radar was tracking a strong thunderstorm over
Picacho Peak State Park, or 19 miles northwest of Marana, moving
northwest at 10 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Eloy, Picacho, Picacho Peak State Park and Red Rock.

This includes the following highways...
 Interstate 10 between mile markers 207 and 227.
 Route 87 between mile markers 116 and 119.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3261 11122 3251 11144 3272 11165 3285 11137
TIME...MOT...LOC 2011Z 150DEG 9KT 3261 11139

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

GEL

Special Weather Statement
National Weather Service Tucson AZ
125 PM MST Fri Aug 12 2022

AZZ502-505-122115-
Tohono O'odham Nation including Sells-South Central Pinal County
including Eloy/Picacho Peak State Park-
125 PM MST Fri Aug 12 2022

...A strong thunderstorm will impact portions of southwestern Pinal
County through 215 PM MST...

At 124 PM MST, Doppler radar was tracking a strong thunderstorm near
Chui-Chu, or 14 miles southwest of Casa Grande. This storm was nearly
stationary.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Chui-Chu, Cockleburr, Jack Rabbit, Shopishk and East Chui-Chu.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3276 11177 3276 11174 3273 11174 3274 11166
      3262 11155 3256 11187 3277 11201 3277 11188
      3279 11187 3279 11178
TIME...MOT...LOC 2024Z 127DEG 2KT 3273 11188

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

TGD