Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 12, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 2, 2021, 3:35 PM MST for Pima County, Pinal County, Arizona. It was in force for 40 min. 4 reports 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 2, 2021, 3:35 PM MST (22:35 UTC)
- Expired
- Jul 2, 2021, 4:15 PM MST
- In force
- 40 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Pima County, AZ, Pinal County, AZ
The radar
The Tucson radar (KEMX), 65 km from the middle of the area, began a volume at 22:36 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 2, 3:38 PM MST | TSTM WND DMG | 7 Nnw Tucson, AZ | ELECTRICAL POWER LINE DOWN BLOCKING ROAD NEAR 1ST AVE AND WETMORE ROAD. VEHICLE TRAVEL RESTRICTED TO ONE LANE. |
| Jul 2, 3:39 PM MST | TSTM WND DMG | 7 Nnw Tucson, AZ | TWEET OF BLOWN DOWN TREE ON NORTH BOUND LANE OF RIVER ROAD AND RIVER ROAD. |
| Jul 2, 4:16 PM MST | TSTM WND DMG | 5 Ssw Oro Valley, AZ | TWEETER POST SHOWING A SHED BLOWN INTO A TRAFFIC LIGHT ON MAGEE ROAD AND LA CANADA DRIVE. |
| Jul 2, 4:21 PM MST | TSTM WND DMG | 7 Nnw Tucson, AZ | LARGE TREE KNOCKED DOWN IN APARTMENT COMPLEX. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 10.6 hours before the alert went out and 27 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.
- Mixed-layer CAPE
- 385 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 1652 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
291
WUUS55 KTWC 022235
SVRTWC
AZC019-021-022315-
/O.NEW.KTWC.SV.W.0012.210702T2235Z-210702T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
335 PM MST Fri Jul 2 2021
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 415 PM MST.
* At 335 PM MST, severe thunderstorms were located along a line
extending from Tucson Estates to 7 miles northwest of Valencia West
to near Saguaro National Park West to near Oro Valley, moving
northwest at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Tucson, Oro Valley, Marana, Casas Adobes, Flowing Wells, Avra
Valley, Tortolita, Tucson Estates, Saguaro National Park West,
Catalina Foothills, Valencia West, Picture Rocks, Dove Mountain and
Ryan AirField.
This includes the following highways...
Interstate 10 between mile markers 235 and 257.
Route 77 between mile markers 70 and 80.
Route 86 between mile markers 159 and 164.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Wind damage with these storms and possible dense blowing dust will
occur before any rain or lightning. Do not wait for the sound of
thunder before taking cover. SEEK SHELTER IMMEDIATELY inside a sturdy
structure and stay away from windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3217 11144 3231 11146 3256 11113 3235 11086
3227 11091 3222 11102 3217 11109 3212 11113
TIME...MOT...LOC 2235Z 116DEG 13KT 3218 11117 3223 11118 3228 11113
3238 11096
HAIL...<.75IN
WIND...60MPH
$$
JRM2 follow-up statements
385
WWUS55 KTWC 022255
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
355 PM MST Fri Jul 2 2021
AZC021-022304-
/O.CAN.KTWC.SV.W.0012.000000T0000Z-210702T2315Z/
Pinal-
355 PM MST Fri Jul 2 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PINAL COUNTY IS
CANCELLED...
The storms which prompted the warning have weakened and moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3217 11144 3231 11146 3247 11124 3229 11097
3227 11098 3223 11105 3218 11113 3213 11116
TIME...MOT...LOC 2254Z 116DEG 13KT 3220 11123 3225 11124 3230 11119
3240 11102
$$
AZC019-022315-
/O.CON.KTWC.SV.W.0012.000000T0000Z-210702T2315Z/
Pima-
355 PM MST Fri Jul 2 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM MST
FOR NORTHEASTERN PIMA COUNTY...
At 354 PM MST, severe thunderstorms were located along a line
extending from near Tucson Estates to near Saguaro National Park West
to Tortolita, moving northwest at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Tucson, Marana, Casas Adobes, Flowing Wells, Avra Valley, Saguaro
National Park West, Tucson Estates, Valencia West, Picture Rocks and
Ryan AirField.
This includes the following highways...
Interstate 10 between mile markers 245 and 255.
Route 77 near mile marker 71.
Route 86 near mile marker 160.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Wind damage with these storms could occur before any rain or
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3217 11144 3231 11146 3247 11124 3229 11097
3227 11098 3223 11105 3218 11113 3213 11116
TIME...MOT...LOC 2254Z 116DEG 13KT 3220 11123 3225 11124 3230 11119
3240 11102
HAIL...<.75IN
WIND...60MPH
$$
JRM988
WWUS55 KTWC 022311
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
411 PM MST Fri Jul 2 2021
AZC019-022321-
/O.EXP.KTWC.SV.W.0012.000000T0000Z-210702T2315Z/
Pima-
411 PM MST Fri Jul 2 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIMA COUNTY WILL
EXPIRE AT 415 PM MST...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tucson.
LAT...LON 3217 11144 3231 11146 3247 11124 3229 11097
3227 11098 3223 11105 3218 11113 3213 11116
TIME...MOT...LOC 2311Z 116DEG 13KT 3222 11129 3227 11130 3232 11125
3242 11108
$$
JRMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 5:15 PM MST | Special Weather Statement | TWC | Cochise | 45 min |
| Jul 2, 11:58 AM MST | Areal Flood Advisory | TWC | Cochise, Graham | 3 hr |
| Jul 2, 12:46 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Jul 2, 1:34 PM MST | Special Weather Statement | TWC | Graham | 26 min |
| Jul 2, 2:05 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 40 min |
| Jul 2, 2:27 PM MST | Special Weather Statement | TWC | 33 min | |
| Jul 2, 2:36 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 39 min |
| Jul 2, 2:48 PM MST | Severe Thunderstorm Warning | TWC | Pima | 42 min |
| Jul 2, 2:53 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 2, 3:01 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 44 min |
| Jul 2, 3:10 PM MST | Severe Thunderstorm Warning | TWC | Graham, Greenlee | 50 min |
| Jul 2, 3:14 PM MST | Areal Flood Advisory | TWC | Pinal | 3 hr |
| Jul 2, 3:24 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 2, 3:25 PM MST | Dust Storm Warning | TWC | Pima, Pinal | 95 min |
| Jul 2, 3:33 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 42 min |
| Jul 2, 3:54 PM MST | Special Weather Statement | TWC | Santa Cruz | 51 min |
| Jul 2, 3:55 PM MST | Special Weather Statement | TWC | Graham | 65 min |
| Jul 2, 4:06 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 39 min |
| Jul 2, 4:09 PM MST | Special Weather Statement | TWC | Graham | 51 min |
| Jul 2, 4:24 PM MST | Special Weather Statement | TWC | Santa Cruz | 36 min |
| Jul 2, 4:34 PM MST | Special Weather Statement | TWC | Santa Cruz | 26 min |
| Jul 2, 4:35 PM MST | Special Weather Statement | TWC | Cochise | 40 min |
| Jul 2, 4:46 PM MST | Special Weather Statement | TWC | Santa Cruz | 29 min |
| Jul 2, 4:51 PM MST | Special Weather Statement | TWC | Pinal | 24 min |
| Jul 2, 4:56 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 3 hr |
Nearby
Severe Thunderstorm Warnings in Arizona, 2021Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.