Dust Storm Warning 13, NWS Tucson, AZ

947 
WWUS55 KTWC 230210
DSWTWC

Dust Storm Warning
National Weather Service Tucson AZ
710 PM MST Wed Aug 22 2018

AZC021-230220-
/O.CAN.KTWC.DS.W.0013.000000T0000Z-180823T0245Z/
Pinal-
710 PM MST Wed Aug 22 2018

...THE DUST STORM WARNING FOR SOUTHWESTERN PINAL COUNTY IS
CANCELLED...

The dust storm which prompted the warning has exited the area.
Therefore, the dust storm warning has been cancelled.

LAT...LON 3274 11129 3258 11171 3279 11183 3279 11178
      3276 11177 3276 11174 3273 11174 3273 11167
      3276 11161 3286 11151 3292 11142
TIME...MOT...LOC 0208Z 206DEG 14KT 3312 11126 3293 11165 

$$

LEINS

Area Forecast Discussion
National Weather Service Tucson AZ
126 PM MST Wed Aug 22 2018

.SYNOPSIS...Abundant moisture will continue to provide elevated
shower and thunderstorm chances into the weekend, even during the
nighttime hours. Some storms will also produce heavy rain and gusty
winds. We may start to see some drying early next week with fewer
storms. Temperatures will run near or a little below normal for late
August.

&&

.DISCUSSION...Well, the plentiful moisture and instability is doing
its work as mentioned in the earlier discussion. Rainfall rates have
been quite high in some of the storms with in excess of 2 inches on
the ground in a few spots already. This will continue through the
evening hours and will need to be vigilant for potential local
flooding.

There is a big question mark for the overnight period and it will
depend highly on what happens over Mexico the next 6-12 hours. 12Z
guidance suggesting the possibility of a redevelopment of
thunderstorm activity late tonight into Thursday morning with heavy
rainfall potential. This is due to a feature over southern Sonora
Mexico visible in the H20 imagery that swings northward. While there
are several model solutions pointing to this happening in some form
or fashion, the details vary on the temporal and spatial extent and
it isn't a sure bet. That said there is a bit of a trend of some
focus across Pinal county east into southern Graham county.
Potential candidate for a flash flood watch late tonight into
Thursday morning for a portion of our area if it continues to trend
in this way. Stay tuned to evening updates on this.

Tonight's question mark leads to a big question mark Thursday
afternoon. If we do indeed get the overnight/morning convection,
Thursday will end up being a cooler and down day thunderstorm wise
thanks for plenty of cloud cover and the atmosphere being worked
over. If the late night/morning period is quiet and clouds don't
linger overhead, tomorrow will be another active day with high levels
of moisture and plenty of instability to work with. With the forecast
vertical wind profile being even a bit lighter than this afternoon
storm motion will be a bit slower than today for potentially local
heavy rains once again.

For now, raised pops a good deal for tonight into Thursday morning
and added locally heavy rain wording to the grids tonight through
Thursday evening.

Friday we still have quite moist southerly flow over the area
resulting in continued scattered thunderstorm activity. The NAM is
rather excited about Friday afternoon (as well as overnight tonight)
while the GFS and the EC have a more typical pattern of convection
over the area. For now I tweaked pops up and enhanced the QPF
forecast as well. Adjusted afternoon high temps down a degree or so.

Saturday onward the flow gradually becomes SW with increasing
strength which will begin to dry the atmosphere from the top down
with an expected drop in thunderstorm activity and increase in high
temperatures. Will need to see how this transition goes as it can
lead to an interesting thunderstorm day if enough moisture and
instability lingers when the when the flow becomes SW and offers an
improved shear profile.

&&

.AVIATION...Valid through 24/00Z.
Scattered TSRA/SHRA will continue into the evening and stand a good
chance of continuing all night into Thursday morning. MVFR
conditions and brief gusts near 40 kts with stronger TSRA with
isolated IFR in +TSRA. Otherwise, cloud decks generally 9k-14k ft
AGL and surface wind variable in direction mainly less than 12 kts.
Aviation discussion not updated for TAF amendments.

&&

.FIRE WEATHER...The pattern will be well suited for shower and
thunderstorm development into this weekend as flow is more southerly
with deeper moisture across the area. Some storms will produce very
heavy rainfall later today through Thursday with local flooding
possible. Terrain driven 20-ft winds persist at less than 15 mph,
except near thunderstorms where gusty outflows will occur at times.

&&

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

PUBLIC...Cerniglia
AVIATION....Cerniglia
FIRE WEATHER...Cerniglia

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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
328 PM MST WED AUG 22 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 PM     TSTM WND DMG     8 SW ORO VALLEY         32.34N 111.05W
08/22/2018                   PIMA               AZ   LAW ENFORCEMENT

            TREES DOWN BLOCKING BOTH DIRECTIONS OF INA
            ROAD JUST EAST OF OLDFATHER ROAD. WINDS
            55MPH OR GREATER.

&&

MP

Special Weather Statement
National Weather Service Tucson AZ
341 PM MST WED AUG 22 2018

AZZ504>506-514-222315-
Santa Catalina and Rincon Mountains including Mount
Lemmon/Summerhaven-Southeast Pinal County including
Kearny/Mammoth/Oracle-Tucson Metro Area including Tucson/Green
Valley/Marana/Vail-South Central Pinal County including Eloy/Picacho
Peak State Park-
341 PM MST WED AUG 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN PIMA AND SOUTH
CENTRAL PINAL COUNTIES UNTIL 415 PM MST...

At 341 PM MST, Doppler radar was tracking a strong thunderstorm over
Tortolita, or near Oro Valley, moving northeast at 15 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Tucson, Oro Valley, Marana, Tortolita, Flowing Wells, Casas Adobes,
Saddlebrooke, Dove Mountain, Catalina State Park, Catalina Foothills,
Oracle Junction, Catalina and Picture Rocks.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3220 11092 3238 11119 3268 11110 3248 11076
TIME...MOT...LOC 2241Z 212DEG 13KT 3238 11102

LEINS

Special Weather Statement
National Weather Service Tucson AZ
410 PM MST WED AUG 22 2018

AZZ503-504-507-513-230015-
Upper San Pedro River Valley including Sierra
Vista/Benson-Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-Upper Santa Cruz River and Altar
Valleys including Nogales-Tucson Metro Area including Tucson/Green
Valley/Marana/Vail-
410 PM MST WED AUG 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL PIMA...SOUTHWESTERN
COCHISE AND NORTHEASTERN SANTA CRUZ COUNTIES UNTIL 515 PM MST...

At 410 PM MST, Doppler radar was tracking strong thunderstorms along
a line extending from 18 miles southeast of East Sahuarita to near
Sierra Vista Southeast. Movement was northeast at 10 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Sierra Vista, Huachuca City, Sierra Vista Southeast, Charleston,
Canelo, Sonoita, Whetstone, Nicksville, Fort Huachuca, Coronado
National Memorial, Hereford, Elgin and Ramsey Canyon Preserve.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy rainfall is also occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

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

&&

LAT...LON 3172 11077 3197 11058 3156 10999 3133 11023
      3133 11030
TIME...MOT...LOC 2310Z 225DEG 7KT 3181 11063 3152 11024

LEINS

Special Weather Statement
National Weather Service Tucson AZ
412 PM MST WED AUG 22 2018

AZZ502-504-505-230015-
Tohono O'odham Nation including Sells-Tucson Metro Area including
Tucson/Green Valley/Marana/Vail-South Central Pinal County including
Eloy/Picacho Peak State Park-
412 PM MST WED AUG 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN PIMA AND
SOUTHWESTERN PINAL COUNTIES UNTIL 515 PM MST...

At 412 PM MST, Doppler radar was tracking a strong thunderstorm 16
miles west of Avra Valley, or 24 miles west of Marana, moving
northeast at 15 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Eloy, Avra Valley, Red Rock, Friendly Corners, Picacho, Picacho Peak,
White Horse Pass, Chuichu and Jackrabbit.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3274 11124 3234 11139 3258 11192 3279 11187
      3279 11178 3276 11177 3276 11174 3273 11174
      3273 11167 3276 11161 3280 11156
TIME...MOT...LOC 2312Z 203DEG 11KT 3251 11158

LEINS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
426 PM MST WED AUG 22 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     TSTM WND DMG     3 NW MARANA             32.45N 111.21W
08/22/2018                   PIMA               AZ   EMERGENCY MNGR

            ROOF BLOWN OFF AT MARANA MIDDLE SCHOOL.

&&

KD

Special Weather Statement
National Weather Service Tucson AZ
440 PM MST WED AUG 22 2018

AZZ503-504-230015-
Upper Santa Cruz River and Altar Valleys including Nogales-Tucson
Metro Area including Tucson/Green Valley/Marana/Vail-
440 PM MST WED AUG 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PIMA COUNTY UNTIL
515 PM MST...

At 438 PM MST, National Weather Service Doppler radar was tracking a
cluster of strong thunderstorms 18 miles west of Green Valley,
moving northeast at 15 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
cluster of thunderstorms.

Locations impacted include...
Green Valley and Three Points.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3160 11127 3171 11147 3210 11124 3198 11097
TIME...MOT...LOC 2338Z 213DEG 24KT 3176 11130

Francis