Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 161, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 28, 2021, 4:24 PM MST for Pima County, Arizona. It was in force for 51 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 28, 2021, 4:24 PM MST (23:24 UTC)
- Expired
- Aug 28, 2021, 5:15 PM MST
- In force
- 51 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Pima County, AZ
The radar
The Tucson radar (KEMX), 73 km from the middle of the area, began a volume at 23:27 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, 11.4 hours before the alert went out and 68 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
- 21 J/kg
- Mixed-layer CIN
- -393 J/kg
- Mixed-layer LCL
- 2964 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
505
WUUS55 KTWC 282324
SVRTWC
AZC019-290015-
/O.NEW.KTWC.SV.W.0161.210828T2324Z-210829T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
424 PM MST Sat Aug 28 2021
The National Weather Service in Tucson has issued a
* Severe Thunderstorm Warning for...
South central Pima County in southeastern Arizona...
* Until 515 PM MST.
* At 423 PM MST, a severe thunderstorm was located 10 miles north of
Arivaca, or 18 miles northwest of Tubac, moving west at 15 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...
Arivaca.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3176 11119 3151 11138 3154 11160 3192 11147
TIME...MOT...LOC 2323Z 096DEG 13KT 3173 11134
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$2 follow-up statements
947 WWUS55 KTWC 282351 SVSTWC Severe Weather Statement National Weather Service Tucson AZ 451 PM MST Sat Aug 28 2021 AZC019-290015- /O.CON.KTWC.SV.W.0161.000000T0000Z-210829T0015Z/ Pima- 451 PM MST Sat Aug 28 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR SOUTH CENTRAL PIMA COUNTY... At 450 PM MST, a severe thunderstorm was located 7 miles west of Arivaca along Arivaca Road, moving west at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Arivaca. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3176 11119 3151 11138 3154 11160 3192 11147 TIME...MOT...LOC 2350Z 086DEG 13KT 3161 11145 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$
077
WWUS55 KTWC 290012
SVSTWC
Severe Weather Statement
National Weather Service Tucson AZ
512 PM MST Sat Aug 28 2021
AZC019-290021-
/O.EXP.KTWC.SV.W.0161.000000T0000Z-210829T0015Z/
Pima-
512 PM MST Sat Aug 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL PIMA COUNTY WILL
EXPIRE AT 515 PM MST...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 3176 11119 3151 11138 3154 11160 3192 11147
TIME...MOT...LOC 0011Z 096DEG 13KT 3162 11153
$$The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 5:01 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 27, 5:04 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 27, 5:27 PM MST | Special Weather Statement | TWC | 33 min | |
| Aug 28, 3:54 AM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 28, 2:34 PM MST | Special Weather Statement | TWC | Santa Cruz | 41 min |
| Aug 28, 2:42 PM MST | Special Weather Statement | TWC | Santa Cruz | 48 min |
| Aug 28, 3:13 PM MST | Severe Thunderstorm Warning | TWC | Pima | 47 min |
| Aug 28, 3:32 PM MST | Areal Flood Advisory | TWC | Pima | 118 min |
| Aug 28, 3:49 PM MST | Special Weather Statement | TWC | Santa Cruz | 41 min |
| Aug 28, 3:53 PM MST | Dust Storm Warning | TWC | Pima | 52 min |
| Aug 28, 3:57 PM MST | Flash Flood Warning | TWC | Santa Cruz | 108 min |
| Aug 28, 3:58 PM MST | Severe Thunderstorm Warning | TWC | Pima | 62 min |
| Aug 28, 4:03 PM MST | Flash Flood Warning | TWC | Pima | 117 min |
| Aug 28, 4:06 PM MST | Special Weather Statement | TWC | 39 min | |
| Aug 28, 4:14 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 28, 4:26 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Aug 28, 4:26 PM MST | Severe Thunderstorm Warning | TWC | Pima | 34 min |
| Aug 28, 4:31 PM MST | Flash Flood Warning | TWC | Pima | 119 min |
| Aug 28, 4:34 PM MST | Areal Flood Advisory | TWC | Graham, Pinal | 116 min |
| Aug 28, 4:37 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 38 min |
| Aug 28, 4:47 PM MST | Dust Storm Warning | TWC | Pima, Pinal | 118 min |
| Aug 28, 4:58 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 62 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.