Alert archive / Arizona / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 97, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 2, 2012, 4:15 PM MST for Pima County, Arizona. It was in force for 23 min. 2 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
- Sep 2, 2012, 4:15 PM MST (23:15 UTC)
- Expired
- Sep 2, 2012, 4:38 PM MST
- In force
- 23 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
County Pima County, AZ
The radar
The Tucson radar (KEMX), 47 km from the middle of the area, began a volume at 23:16 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 |
|---|---|---|---|
| Sep 2, 4:20 PM MST | TSTM WND DMG | 1 W Tucson, AZ | REPORT OF TREES DOWN IN MEDIAN |
| Sep 2, 4:48 PM MST | TSTM WND DMG | 1 Nnw Catalina Foothill, AZ | 20FT TREE DOWN... PARTIALLY IN ROAD |
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, 11.3 hours before the alert went out and 7 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
- 166 J/kg
- Mixed-layer CIN
- -271 J/kg
- Mixed-layer LCL
- 2049 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
441 WUUS55 KTWC 022315 SVRTWC AZC019-030000- /O.NEW.KTWC.SV.W.0097.120902T2315Z-120903T0000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 415 PM MST SUN SEP 2 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA... THIS INCLUDES THE CITY OF TUCSON... * UNTIL 500 PM MST * AT 410 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 NEAR CENTRAL AND NORTH CENTRAL TUCSON AND SPREADING VERY SLOWLY SOUTH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOUTH TUCSON. 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 3213 11107 3233 11106 3234 11077 3214 11077 TIME...MOT...LOC 2313Z 081DEG 6KT 3225 11093 $$ MEYER
1 follow-up statement
164 WWUS55 KTWC 022338 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 438 PM MST SUN SEP 2 2012 AZC019-022347- /O.CAN.KTWC.SV.W.0097.000000T0000Z-120903T0000Z/ PIMA AZ- 438 PM MST SUN SEP 2 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA COUNTY IS CANCELLED... AT 437 PM MST THE THUNDERSTORM NEAR CENTRAL TUCSON HAD DIMINISHED IN INTENSITY TO BELOW SEVERE LEVELS. LAT...LON 3213 11107 3233 11106 3234 11077 3214 11077 TIME...MOT...LOC 2337Z 081DEG 6KT 3221 11096 $$ MEYER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 7:50 PM MST | Areal Flood Advisory | TWC | Pima | 115 min |
| Sep 2, 2:10 PM MST | Special Weather Statement | TWC | Santa Cruz | 50 min |
| Sep 2, 3:19 PM MST | Special Weather Statement | TWC | 56 min | |
| Sep 2, 3:25 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 50 min |
| Sep 2, 3:31 PM MST | Severe Thunderstorm Warning | TWC | Pima | 44 min |
| Sep 2, 3:35 PM MST | Areal Flood Advisory | TWC | Pima | 85 min |
| Sep 2, 3:43 PM MST | Special Weather Statement | TWC | Pima | 47 min |
| Sep 2, 3:59 PM MST | Areal Flood Advisory | TWC | Pima | 91 min |
| Sep 2, 4:15 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 3 hr |
| Sep 2, 4:47 PM MST | Severe Thunderstorm Warning | TWC | Pima | 43 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.