Alert archive / Arizona / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 99, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 3, 2012, 4:28 PM MST for Pima 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
- Sep 3, 2012, 4:28 PM MST (23:28 UTC)
- Expired
- Sep 3, 2012, 5:15 PM MST
- In force
- 47 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
County Pima County, AZ
The radar
The Tucson radar (KEMX), 67 km from the middle of the area, began a volume at 23:28 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, 11.5 hours before the alert went out and 70 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
- 65 J/kg
- Mixed-layer CIN
- -358 J/kg
- Mixed-layer LCL
- 2003 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- -41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
898 WUUS55 KTWC 032328 SVRTWC AZC019-040015- /O.NEW.KTWC.SV.W.0099.120903T2328Z-120904T0015Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 428 PM MST MON SEP 3 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 515 PM MST * AT 424 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED 8 MILES NORTHEAST OF ARIVACA NEAR ARIVACA ROAD...OR 19 MILES SOUTHWEST OF GREEN VALLEY...AND MOVING SOUTHWEST AT 5 MPH. * THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 70 MPH... LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM. && LAT...LON 3153 11120 3160 11148 3179 11129 3165 11116 TIME...MOT...LOC 2327Z 031DEG 5KT 3166 11126 $$ MEYER
2 follow-up statements
909 WWUS55 KTWC 032346 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 446 PM MST MON SEP 3 2012 AZC019-040015- /O.CON.KTWC.SV.W.0099.000000T0000Z-120904T0015Z/ PIMA AZ- 446 PM MST MON SEP 3 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR SOUTH CENTRAL PIMA COUNTY... AT 442 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR ARIVACA...OR 24 MILES SOUTHWEST OF GREEN VALLEY...MOVING SOUTHWEST AT 5 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 70 MPH... LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM. && LAT...LON 3153 11120 3160 11148 3179 11129 3165 11116 TIME...MOT...LOC 2346Z 031DEG 5KT 3161 11132 $$ MEYER
967 WWUS55 KTWC 040012 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 512 PM MST MON SEP 3 2012 AZC019-040021- /O.EXP.KTWC.SV.W.0099.000000T0000Z-120904T0015Z/ PIMA AZ- 512 PM MST MON SEP 3 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL PIMA COUNTY WILL EXPIRE AT 515 PM MST... AT 511 PM MST THE THUNDERSTORMS IN THE ARIVACA AREA HAD DIMINISHED IN INTENSITY. A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE AREA. LAT...LON 3153 11120 3160 11148 3179 11129 3165 11116 TIME...MOT...LOC 0011Z 031DEG 5KT 3158 11134 $$ MEYER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 5:02 PM MST | Flash Flood Warning | TWC | Pima | 118 min |
| Sep 2, 5:10 PM MST | Flash Flood Warning | TWC | Pima | 80 min |
| Sep 2, 5:25 PM MST | Blowing Dust Advisory | TWC | Pima, Pinal | 100 min |
| Sep 2, 5:52 PM MST | Special Weather Statement | TWC | Pima | 38 min |
| Sep 2, 6:59 PM MST | Flash Flood Warning | TWC | Pima, Pinal | 2 hr |
| Sep 2, 8:22 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 3 hr |
| Sep 2, 8:40 PM MST | Flash Flood Warning | TWC | Pima | 80 min |
| Sep 3, 1:47 PM MST | Flash Flood Warning | TWC | Cochise | 118 min |
| Sep 3, 3:03 PM MST | Special Weather Statement | TWC | Santa Cruz | 42 min |
| Sep 3, 3:25 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 2 hr |
| Sep 3, 3:35 PM MST | Special Weather Statement | TWC | Santa Cruz | 40 min |
| Sep 3, 3:57 PM MST | Areal Flood Advisory | TWC | Cochise | 93 min |
| Sep 3, 4:05 PM MST | Flash Flood Warning | TWC | Cochise | 115 min |
| Sep 3, 4:46 PM MST | Flash Flood Warning | TWC | Pima | 119 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.