Severe Thunderstorm Warning 9, NWS Tucson, AZ

508 
WWUS55 KTWC 042121
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
221 PM MST Mon Jul 4 2022

AZC019-042131-
/O.EXP.KTWC.SV.W.0009.000000T0000Z-220704T2130Z/
Pima-
221 PM MST Mon Jul 4 2022

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA COUNTY WILL
EXPIRE AT 230 PM MST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tucson.

LAT...LON 3179 11108 3179 11129 3212 11136 3213 11105
TIME...MOT...LOC 2121Z 175DEG 10KT 3194 11121 

$$

JRM

Area Forecast Discussion
National Weather Service Tucson AZ
941 AM MST Mon Jul 4 2022

.SYNOPSIS...Scattered showers and thunderstorms are expected through
this evening and again on the 4th of July. Then Tuesday through
Friday the storms should become more isolated and mainly limited to
areas near the Mexico and New Mexico borders with afternoon
temperatures gradually warming. Storm activity should gradually
increase again next weekend.

&&

.UPDATE...
An interesting forecast is setting up for this 4th of July holiday.
Morning sounding was not very impressive with little instability and
weak mid-level lapse rates. PWAT is running at 1.34" which is well
above the daily average of 1.06" for this day. There is a
distinctive dry layer above 530 mb which could facilitate some
stronger winds with storms that do develop. Even with the sounding
being rather lackluster, there will be additional mid level support
as a wave progresses northward through the area today. This should
help overcome the inhibiting factors mentioned above. Evolution of
showers and storms will start around noon today with CAMs suggesting
best chances mainly along and north of Interstate 10 in southeast
Arizona. The southern half of Cochise, Santa Cruz, and
central/western Pima counties look to see the lowest area of
convection today but confidence is not high in the precip chances
for Santa Cruz County. They will get full sun this morning with
instability in place this afternoon so wouldn't be surprised if
they saw more than just a couple of showers and storms. Additional
upper level support could also continue at least scattered shower
activity into this evening. A downward trend in coverage will begin
after 8 pm but lingering showers will still be possible through 10PM-
11PM, including in the Tucson area. Those planning to be outside
this evening should keep an eye on the weather as showers and storms
develop throughout the day and into tonight. If you can hear thunder
then you are in range of being struck and it is time to take shelter
in a building or hard-topped vehicle until the storm has passed.
Other storm impacts will include gusty winds, potential blowing
dust, and a few spots seeing some flooding issues. Forecast has been
updated to reflect the trends mentioned.

&&

.AVIATION...Valid through 05/12Z.
FEW-SCT clouds at 11-14k ft AGL and BKN-OVC clouds AOA 20k ft AGL
thru 04/17Z. Between 04/17Z and 05/05Z, SCT-BKN clouds at 7k-9k ft
AGL and SCT SHRA/TSRA. Diminishing clouds and shower/storm activity
aft 05/05Z. Erratic SFC wind gusts and outflows in excess of 40 kts
possible with TSRA during the afternoon/evening hours. Otherwise,
SFC wind generally less than 12 kts, favoring a SLY/SWLY direction
during the afternoon hours and variable in direction at other times.
Aviation discussion not updated for TAF amendments.

&&

.FIRE WEATHER...Monsoon moisture will remain in place over the next
several days keeping RH values well above critical thresholds.
Showers and thunderstorms will be possible across much of the area
today. Fewer storms are then expected Tuesday through Friday, with
the focus near the Mexico and New Mexico borders. An upswing in
activity is expected again late this weekend. Any storm will carry
the threats of lightning, strong wind gusts and localized flooding.

&&

.PREV DISCUSSION... /issued 220 AM MST Mon Jul 4 2022/

.DISCUSSION...Latest models were still advertising one more day of
scattered showers and thunderstorms today before a drier flow
pattern develops on Tuesday through at least Friday. This drier
environment will limit the amount/coverage of daily thunderstorms.

&&

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

&&

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Special Weather Statement
National Weather Service Tucson AZ
1105 AM MST Mon Jul 4 2022

AZZ508-512-041845-
Chiricahua Mountains including Chiricahua National Monument-Eastern
Cochise County Below 5000 Feet including Douglas/Willcox-
1105 AM MST Mon Jul 4 2022

...A strong thunderstorm will impact portions of northeastern Cochise
County through 1145 AM MST...

At 1104 AM MST, Doppler radar was tracking a strong thunderstorm near
Chiricahua National Monument, or 15 miles west of Rodeo. This storm
was nearly stationary.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Portal, Chiricahua National Monument and Paradise.

This includes Route 181 near mile marker 64.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Very Heavy 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.

CC
&&

LAT...LON 3186 10912 3185 10936 3219 10945 3221 10916
TIME...MOT...LOC 1804Z 170DEG 3KT 3195 10927

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

CSC

Special Weather Statement
National Weather Service Tucson AZ
1248 PM MST Mon Jul 4 2022

AZZ503-507-513-042030-
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-
1248 PM MST Mon Jul 4 2022

...A strong thunderstorm will impact portions of southwestern Cochise
and southeastern Santa Cruz Counties through 130 PM MST...

At 1246 PM MST, Doppler radar was tracking a strong thunderstorm near
Parker Canyon Lake, or 17 miles west of Sierra Vista, moving north at
25 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Sonoita, Elgin, Parker Canyon Lake, and Canelo.

This includes Route 83 between mile markers 3 and 27.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Very heavy 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.

CCAC
&&

LAT...LON 3162 11070 3167 11056 3164 11037 3135 11039
      3133 11054 3133 11060
TIME...MOT...LOC 1946Z 171DEG 20KT 3142 11051

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

CSC

Special Weather Statement
National Weather Service Tucson AZ
108 PM MST Mon Jul 4 2022

AZZ508-512-042100-
Chiricahua Mountains including Chiricahua National Monument-Eastern
Cochise County Below 5000 Feet including Douglas/Willcox-
108 PM MST Mon Jul 4 2022

...A strong thunderstorm will impact portions of east central Cochise
County through 200 PM MST...

At 107 PM MST, Doppler radar was tracking a strong thunderstorm 9
miles south of Chiricahua National Monument, or 16 miles west of
Rodeo, moving north at 10 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Portal, Chiricahua National Monument and Paradise.

This includes the following highways...
 Route 181 between mile markers 60 and 64.
 Route 186 between mile markers 358 and 359.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Frequent 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 3180 10914 3179 10941 3213 10948 3213 10909
TIME...MOT...LOC 2007Z 177DEG 14KT 3187 10932

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

CSC

Special Weather Statement
National Weather Service Tucson AZ
140 PM MST Mon Jul 4 2022

AZZ507-513-042145-
Upper San Pedro River Valley including Sierra
Vista/Benson-Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-
140 PM MST Mon Jul 4 2022

...A strong thunderstorm will impact portions of east central Pima
and west central Cochise Counties through 245 PM MST...

At 138 PM MST, Doppler radar was tracking a strong thunderstorm near
Kartchner Caverns State Park, or 12 miles south of Benson, moving
north 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...
Benson, Whetstone, St. David, Kartchner Caverns State Park and
Mescal.

This includes the following highways...
 Interstate 10 between mile markers 295 and 311.
 Route 80 between mile markers 293 and 303.
 Route 82 between mile markers 47 and 49, and between mile markers 55
and 59.
 Route 90 between mile markers 290 and 308.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

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

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 3170 11022 3169 11043 3204 11050 3205 11019
TIME...MOT...LOC 2038Z 177DEG 11KT 3177 11034

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

CSC