Alert archive / Arizona / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 59, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 11, 2012, 2:38 PM MST for Pima County, Arizona. It was in force for 22 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 11, 2012, 2:38 PM MST (21:38 UTC)
- Expired
- Aug 11, 2012, 3:00 PM MST
- In force
- 22 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
County Pima County, AZ
The radar
The Tucson radar (KEMX), 103 km from the middle of the area, began a volume at 21:39 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 (KDMA), launched 12:00Z, 9.6 hours before the alert went out and 72 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
- 144 J/kg
- Mixed-layer CIN
- -298 J/kg
- Mixed-layer LCL
- 2512 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
638 WUUS55 KTWC 112138 SVRTWC AZC019-112200- /O.NEW.KTWC.SV.W.0059.120811T2138Z-120811T2200Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 238 PM MST SAT AUG 11 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 300 PM MST * AT 230 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE THUNDERSTORMS WERE LOCATED NEAR THREE POINTS...OR 16 MILES NORTHEAST OF SELLS...AND MOVING NORTHWEST AT 20 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SANTA ROSA RANCH...SAN PEDRO...SIL NAGGIA...QUEENS WELL AND SILVER BELL. 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 3243 11187 3243 11136 3189 11140 3188 11180 TIME...MOT...LOC 2136Z 155DEG 18KT 3207 11161 $$
2 follow-up statements
832 WWUS55 KTWC 112155 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 255 PM MST SAT AUG 11 2012 AZC019-112200- /O.CON.KTWC.SV.W.0059.000000T0000Z-120811T2200Z/ PIMA AZ- 255 PM MST SAT AUG 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM MST FOR CENTRAL PIMA COUNTY... AT 248 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SANTA ROSA RANCH...OR 20 MILES NORTHEAST OF SELLS...MOVING NORTHWEST AT 20 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH... LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM. && LAT...LON 3243 11187 3243 11136 3189 11140 3188 11180 TIME...MOT...LOC 2154Z 155DEG 18KT 3215 11165 $$
463 WWUS55 KTWC 112204 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 304 PM MST SAT AUG 11 2012 AZC019-112211- /O.EXP.KTWC.SV.W.0059.000000T0000Z-120811T2200Z/ PIMA AZ- 304 PM MST SAT AUG 11 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PIMA COUNTY HAS EXPIRED... AT 300 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A WEAKENING AREA OF THUNDERSTORMS ACROSS CENTRAL PIMA COUNTY. THESE THUNDERSTORMS ARE EXPECTED TO WEAKEN FURTHER AND THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 3243 11187 3243 11136 3189 11140 3188 11180 TIME...MOT...LOC 2155Z 155DEG 18KT 3215 11165 $$
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 5:05 PM MST | Severe Thunderstorm Warning | TWC | Pima | 25 min |
| Aug 10, 5:32 PM MST | Severe Thunderstorm Warning | TWC | Pima | 43 min |
| Aug 10, 6:23 PM MST | Special Weather Statement | TWC | Pima | 52 min |
| Aug 11, 1:19 AM MST | Special Weather Statement | TWC | Pima | 41 min |
| Aug 11, 2:02 PM MST | Special Weather Statement | TWC | Pima | 43 min |
| Aug 11, 3:35 PM MST | Severe Thunderstorm Warning | TWC | Pima | 40 min |
| Aug 11, 3:41 PM MST | Severe Thunderstorm Warning | TWC | Pima | 34 min |
| Aug 11, 3:45 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
| Aug 11, 4:09 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 11, 4:19 PM MST | Severe Thunderstorm Warning | TWC | Pima | 26 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.