Alert archive / Arizona / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 69, NWS Tucson, AZ

July 24, 2022Pima County, Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 24, 2022, 2:37 PM MST for Pima County, Pinal County, Arizona. It was in force for 53 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 24, 2022, 2:37 PM MST (21:37 UTC)
Expired: Jul 24, 2022, 3:30 PM MST
In force: 53 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Pima County, AZ, Pinal County, AZ

The radar

The Tucson radar (KEMX), 66 km from the middle of the area, began a volume at 21:40 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.

What was reported inside it

Time	Report	Where	Remark
Jul 24, 2:45 PM MST	TSTM WND DMG	2 S Oro Valley, AZ	TREE DAMAGE REPORTED IN SUBDIVISION. TIME ESTIMATED BASED ON RADAR AND REPORT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 8 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 9.6 hours before the alert went out and 29 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: 230 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1570 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

493 
WUUS55 KTWC 242137
SVRTWC
AZC019-021-242230-
/O.NEW.KTWC.SV.W.0069.220724T2137Z-220724T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
237 PM MST Sun Jul 24 2022

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Northeastern Pima County in southeastern Arizona...
  Southeastern Pinal County in southeastern Arizona...

* Until 330 PM MST.

* At 237 PM MST, a severe thunderstorm was located over Oro Valley,
  and is nearly stationary.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Catalina, Oro Valley, Marana, Tortolita and Catalina State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

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

&&

LAT...LON 3242 11085 3236 11094 3243 11107 3253 11094
TIME...MOT...LOC 2137Z 132DEG 4KT 3242 11095 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JRM

2 follow-up statements

852 
WWUS55 KTWC 242206
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
306 PM MST Sun Jul 24 2022

AZC019-021-242230-
/O.CON.KTWC.SV.W.0069.000000T0000Z-220724T2230Z/
Pima-Pinal-
306 PM MST Sun Jul 24 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM MST
FOR NORTHEASTERN PIMA AND SOUTHEASTERN PINAL COUNTIES...

At 306 PM MST, a severe thunderstorm was located over Oro Valley, and
is nearly stationary.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Catalina, Oro Valley, Marana, Tortolita and Catalina State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 3242 11085 3236 11094 3243 11107 3253 11094
TIME...MOT...LOC 2206Z 132DEG 4KT 3244 11098 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JRM

687 
WWUS55 KTWC 242224
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
324 PM MST Sun Jul 24 2022

AZC019-021-242234-
/O.EXP.KTWC.SV.W.0069.000000T0000Z-220724T2230Z/
Pima-Pinal-
324 PM MST Sun Jul 24 2022

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIMA AND
SOUTHEASTERN PINAL COUNTIES WILL EXPIRE AT 330 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 3242 11085 3236 11094 3243 11107 3253 11094
TIME...MOT...LOC 2224Z 132DEG 4KT 3245 11100 

$$

JRM

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 24, 2:00 PM MST, 37 minutes earlier.

Area forecast discussion, Jul 24, 2:00 PM MST, 37 minutes before

Area Forecast Discussion
National Weather Service Tucson AZ
200 PM MST Sun Jul 24 2022

.SYNOPSIS...Deeper moisture and a favorable weather pattern will
result in more widespread rainfall through this coming work week.
This wetter period could result in flooding and flash flooding
across the area the next few days.

&&

.DISCUSSION...Thunderstorms managed to redevelop late this morning
with most of the activity already producing heavy rainfall across
parts of southwest Cochise and eastern Santa Cruz counties. As
another disturbance approaches from the east, additional showers and
thunderstorms will form across SE AZ through late tonight. A wet
flow pattern will remain in place this coming work week with day-to-
day fluctuations in the areal coverage of thunderstorms expected.
Heavy rainfall will continue to be the main concern with elevated
flows in normally dry washes and small streams. After a few days of
rain, some of the larger washes could experience significant flows
by the end of the week. The rain chances will be enhanced and
sustained as an upper low/inverted trough currently positioned over
the southern tip of Texas approaches the area on Monday. Latest
models keep some form of this feature nearby through Wednesday
before tracking farther west of the Baja California Peninsula by
early Thursday. That said, a flash flood watch remains in effect for
all of SE AZ through late Tuesday and may need to be extended to
include Tuesday night and Wednesday. Otherwise, cloudiness and more
widespread rainfall will help keep daytime temperatures closer to or
slightly below seasonable readings.

&&

.AVIATION...Valid through 26/00Z.
Isolated to Scattered TSRA. Localized +TSRA likely. Lower cigs
between 4-7k ft AGL can be expected around precipitation,
including gusty winds in excess of 40 kts. Otherwise, cloud bases
range 8-12k ft AGL with diurnal sfc winds generally less than 12
kts. Aviation discussion not updated for TAF amendments.

&&

.FIRE WEATHER...Deeper moisture in place will bring more widespread
showers and thunderstorms, providing a greater potential for heavy
rainfall. Most locations should see at least a wetting rain into
next week, with many locations seeing areal averages greater than
one half inch. Strong and erratic outflow winds accompany the
stronger storms, with otherwise diurnal wind trends.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...
   Flood Watch through Tuesday afternoon for AZZ501>515.

&&

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

In the hours before

Special weather statement, Jul 24, 12:18 PM MST, 2 hours 19 minutes before

Special Weather Statement
National Weather Service Tucson AZ
1218 PM MST Sun Jul 24 2022

AZZ503-513-242000-
Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-Upper Santa Cruz River and Altar
Valleys including Nogales-
1218 PM MST Sun Jul 24 2022

...A strong thunderstorm will impact portions of east central Santa
Cruz County through 100 PM MST...

At 1218 PM MST, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Patagonia, or 19 miles east of Nogales, moving
northwest at 10 mph.

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.

This storm will remain over mainly remote areas of east central Santa
Cruz County.

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 3147 11054 3141 11061 3147 11080 3161 11064
TIME...MOT...LOC 1918Z 135DEG 7KT 3147 11063

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

JRM

Special weather statement, Jul 24, 12:29 PM MST, 2 hours 8 minutes before

Special Weather Statement
National Weather Service Tucson AZ
1229 PM MST Sun Jul 24 2022

AZZ507-242000-
Upper San Pedro River Valley including Sierra Vista/Benson-
1229 PM MST Sun Jul 24 2022

...A strong thunderstorm will impact portions of west central Cochise
County through 100 PM MST...

At 1228 PM MST, Doppler radar was tracking a strong thunderstorm over
Tombstone, or 16 miles northeast of Sierra Vista, moving northwest at
5 mph.

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...
Tombstone and Fairbank.

This includes the following highways...
 Route 80 between mile markers 311 and 325.
 Route 82 between mile markers 59 and 67.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3168 10994 3159 11010 3173 11025 3185 11003
TIME...MOT...LOC 1928Z 149DEG 6KT 3169 11006

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

RAH

Local storm report, Jul 24, 12:52 PM MST, 1 hour 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
1252 PM MST SUN JUL 24 2022

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

1224 PM     FLASH FLOOD      4 NNW BISBEE            31.46N 109.94W
07/24/2022                   COCHISE            AZ   DEPT OF HIGHWAYS

            ROCKS ON ROADWAY...LIKELY FLASH FLOODING
            FROM VERY HEAVY RAIN OVER 3 IN SPOTS.

&&

JRM

Local storm report, Jul 24, 1:00 PM MST, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
100 PM MST SUN JUL 24 2022

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

1255 PM     HEAVY RAIN       5 SE SIERRA VISTA       31.51N 110.26W
07/24/2022  M1.00 INCH       COCHISE            AZ   TRAINED SPOTTER

            HEAVY RAIN FROM THUNDERSTORMS IN 40 MINS.

&&

JRM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 8:07 PM MST	Special Weather Statement	TWC		23 min
Jul 23, 9:04 PM MST	Special Weather Statement	TWC		41 min
Jul 23, 9:20 PM MST	Special Weather Statement	TWC		40 min
Jul 23, 10:26 PM MST	Special Weather Statement	TWC	Cochise	34 min
Jul 23, 11:03 PM MST	Special Weather Statement	TWC	Graham	42 min
Jul 23, 11:20 PM MST	Special Weather Statement	TWC	Santa Cruz	40 min
Jul 23, 11:28 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	2 hr
Jul 23, 11:38 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 24, 12:07 AM MST	Special Weather Statement	TWC	Santa Cruz	53 min
Jul 24, 12:10 AM MST	Special Weather Statement	TWC	Cochise, Graham	65 min
Jul 24, 1:13 AM MST	Special Weather Statement	TWC		62 min
Jul 24, 3:29 AM MST	Special Weather Statement	TWC		61 min
Jul 24, 3:42 AM MST	Severe Thunderstorm Warning	TWC	Pinal	48 min
Jul 24, 4:20 AM MST	Dust Storm Advisory	TWC	Pinal	85 min
Jul 24, 4:28 AM MST	Severe Thunderstorm Warning	TWC	Pinal	47 min
Jul 24, 4:50 AM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Jul 24, 11:47 AM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 24, 12:14 PM MST	Areal Flood Advisory	TWC	Cochise, Santa Cruz	3 hr
Jul 24, 12:18 PM MST	Special Weather Statement	TWC	Santa Cruz	42 min
Jul 24, 12:29 PM MST	Special Weather Statement	TWC	Cochise	31 min
Jul 24, 12:54 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	111 min
Jul 24, 1:13 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	3 hr
Jul 24, 1:39 PM MST	Severe Thunderstorm Warning	TWC	Cochise	31 min
Jul 24, 2:13 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Jul 24, 2:19 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 24, 2:35 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	115 min
Jul 24, 2:47 PM MST	Special Weather Statement	TWC		43 min
Jul 24, 3:00 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 24, 3:23 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham, Pima, Pinal	52 min
Jul 24, 3:35 PM MST	Special Weather Statement	TWC		40 min
Jul 24, 3:36 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min
Jul 24, 3:39 PM MST	Dust Storm Advisory	TWC	Cochise, Graham	66 min
Jul 24, 3:40 PM MST	Severe Thunderstorm Warning	TWC	Pima	50 min
Jul 24, 3:55 PM MST	Areal Flood Advisory	TWC	Cochise, Graham, Pima, Pinal	3 hr
Jul 24, 3:58 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Jul 24, 4:09 PM MST	Areal Flood Advisory	TWC	Pima	5 hr
Jul 24, 4:21 PM MST	Special Weather Statement	TWC	Pinal	39 min
Jul 24, 4:31 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 24, 4:40 PM MST	Severe Thunderstorm Warning	TWC	Pinal	32 min
Jul 24, 4:45 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	2 hr
Jul 24, 4:59 PM MST	Severe Thunderstorm Warning	TWC	Graham, Greenlee	46 min

Nearby

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Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.