Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 137, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 13, 2021, 4:43 PM MST for Santa Cruz County, Arizona. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2021, 4:43 PM MST (23:43 UTC)
- Expired
- Aug 13, 2021, 5:30 PM MST
- In force
- 47 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 61 km from the middle of the area, began a volume at 23:43 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.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 11.7 hours before the alert went out and 79 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
- 544 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 1049 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- -1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
309
WUUS55 KTWC 132343
SVRTWC
AZC023-140030-
/O.NEW.KTWC.SV.W.0137.210813T2343Z-210814T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
443 PM MST Fri Aug 13 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
South central Santa Cruz County in southeastern Arizona...
* Until 530 PM MST.
* At 443 PM MST, a severe thunderstorm was located over Rio Rico, or
9 miles southeast of Tubac, moving southwest at 5 mph.
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...
Rio Rico.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3145 11113 3154 11100 3150 11091 3139 11097
TIME...MOT...LOC 2343Z 042DEG 5KT 3150 11099
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JRM2 follow-up statements
244
WWUS55 KTWC 140001
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
501 PM MST Fri Aug 13 2021
AZC023-140030-
/O.CON.KTWC.SV.W.0137.000000T0000Z-210814T0030Z/
Santa Cruz-
501 PM MST Fri Aug 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MST
FOR SOUTH CENTRAL SANTA CRUZ COUNTY...
At 501 PM MST, a severe thunderstorm was located over Rio Rico, or 9
miles southeast of Tubac, and is nearly stationary.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Rio Rico.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3144 11107 3151 11099 3148 11092 3139 11097
TIME...MOT...LOC 0001Z 345DEG 1KT 3150 11099
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JRM130
WWUS55 KTWC 140020
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
520 PM MST Fri Aug 13 2021
AZC023-140030-
/O.EXP.KTWC.SV.W.0137.000000T0000Z-210814T0030Z/
Santa Cruz-
520 PM MST Fri Aug 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SANTA CRUZ
COUNTY WILL EXPIRE AT 530 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 3144 11107 3151 11099 3148 11092 3139 11097
TIME...MOT...LOC 0020Z 042DEG 5KT 3148 11101
$$
JRMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 6:10 PM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Aug 12, 6:42 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Aug 12, 11:08 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 112 min |
| Aug 13, 1:56 PM MST | Areal Flood Advisory | TWC | Cochise, Santa Cruz | 118 min |
| Aug 13, 2:04 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 109 min |
| Aug 13, 2:25 PM MST | Special Weather Statement | TWC | Graham | 50 min |
| Aug 13, 2:42 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Aug 13, 3:14 PM MST | Special Weather Statement | TWC | Graham | 46 min |
| Aug 13, 3:20 PM MST | Special Weather Statement | TWC | 40 min | |
| Aug 13, 3:30 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pinal | 45 min |
| Aug 13, 3:56 PM MST | Flash Flood Warning | TWC | Cochise | 5 hr |
| Aug 13, 4:06 PM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Aug 13, 4:35 PM MST | Special Weather Statement | TWC | Santa Cruz | 25 min |
| Aug 13, 4:37 PM MST | Areal Flood Advisory | TWC | Graham, Greenlee | 113 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.