Alert archive / Arizona / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 22, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 21, 2012, 12:56 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 34 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
- Jul 21, 2012, 12:56 PM MST (19:56 UTC)
- Expired
- Jul 21, 2012, 1:30 PM MST
- In force
- 34 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
Counties Pima County, AZ, Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 48 km from the middle of the area, began a volume at 19:58 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, 7.9 hours before the alert went out and 55 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
- 444 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 1517 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
676 WUUS55 KTWC 211956 SVRTWC AZC019-023-212030- /O.NEW.KTWC.SV.W.0022.120721T1956Z-120721T2030Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 1256 PM MST SAT JUL 21 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN PIMA COUNTY IN SOUTH CENTRAL ARIZONA... NORTH CENTRAL SANTA CRUZ COUNTY IN SOUTHEAST ARIZONA... * UNTIL 130 PM MST * AT 1250 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES NORTH OF TUBAC...OR 10 MILES SOUTH OF GREEN VALLEY...AND MOVING WEST AT 10 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO AMADO AND ARIVACA JUNCTION. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH... LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM. && LAT...LON 3166 11122 3184 11110 3176 11091 3160 11099 TIME...MOT...LOC 1956Z 110DEG 9KT 3171 11105 $$ MEYER
2 follow-up statements
257 WWUS55 KTWC 212011 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 111 PM MST SAT JUL 21 2012 AZC019-023-212030- /O.CON.KTWC.SV.W.0022.000000T0000Z-120721T2030Z/ SANTA CRUZ AZ-PIMA AZ- 111 PM MST SAT JUL 21 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM MST FOR SOUTHEASTERN PIMA AND NORTH CENTRAL SANTA CRUZ COUNTIES... AT 110 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR AMADO...OR 11 MILES SOUTH OF GREEN VALLEY...MOVING WEST AT 10 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH... LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM. && LAT...LON 3166 11122 3184 11110 3176 11091 3160 11099 TIME...MOT...LOC 2011Z 110DEG 9KT 3170 11107 $$ MEYER
572 WWUS55 KTWC 212028 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 128 PM MST SAT JUL 21 2012 AZC019-023-212038- /O.EXP.KTWC.SV.W.0022.000000T0000Z-120721T2030Z/ SANTA CRUZ AZ-PIMA AZ- 128 PM MST SAT JUL 21 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PIMA AND NORTH CENTRAL SANTA CRUZ COUNTIES WILL EXPIRE AT 130 PM MST... AT 128 PM MST THE THUNDERSTORMS NEAR INTERSTATE 19 BETWEEN GREEN VALLEY AND TUBAC HAD WEAKENED. LAT...LON 3166 11122 3184 11110 3176 11091 3160 11099 TIME...MOT...LOC 2028Z 110DEG 9KT 3171 11112 $$ MEYER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 5:26 PM MST | Areal Flood Advisory | TWC | Pima | 94 min |
| Jul 21, 12:49 PM MST | Special Weather Statement | TWC | Santa Cruz | 41 min |
| Jul 21, 1:43 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 2 hr |
| Jul 21, 1:53 PM MST | Flash Flood Warning | TWC | Pima | 112 min |
| Jul 21, 2:26 PM MST | Areal Flood Advisory | TWC | Graham | 2 hr |
| Jul 21, 2:27 PM MST | Severe Thunderstorm Warning | TWC | Pima | 33 min |
| Jul 21, 3:01 PM MST | Severe Thunderstorm Warning | TWC | Pima | 44 min |
| Jul 21, 3:05 PM MST | Severe Thunderstorm Warning | TWC | Pima | 40 min |
| Jul 21, 3:25 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 50 min |
| Jul 21, 3:36 PM MST | Severe Thunderstorm Warning | TWC | Graham, Pinal | 39 min |
| Jul 21, 3:38 PM MST | Areal Flood Advisory | TWC | Pima | 58 min |
| Jul 21, 4:07 PM MST | Areal Flood Advisory | TWC | Pinal | 83 min |
| Jul 21, 4:11 PM MST | Areal Flood Advisory | TWC | Pinal | 79 min |
| Jul 21, 4:27 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 108 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2012Every severe thunderstorm warning in 2012
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.