Alert archive / Alabama / Mesoscale Discussions in 2012
Mesoscale Discussion 1034
The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2012, 3:47 PM CDT for 16 counties in Alabama. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Jun 3, 2012, 3:47 PM CDT (20:47 UTC)
- Expired
- Jun 3, 2012, 5:15 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
Counties Bibb County, AL, Blount County, AL, Calhoun County, AL, Clay County, AL, Cleburne County, AL, Cullman County, AL, Etowah County, AL, Fayette County, AL, Jefferson County, AL, Marshall County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL
The radar
The Birmingham radar (KBMX), 68 km from the middle of the area, began a volume at 20:46 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 8.8 hours before the alert went out and 67 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1403 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
557
ACUS11 KWNS 032048
SWOMCD
SPC MCD 032047
ALZ000-032215-
MESOSCALE DISCUSSION 1034
NWS STORM PREDICTION CENTER NORMAN OK
0347 PM CDT SUN JUN 03 2012
AREAS AFFECTED...AL
CONCERNING...SEVERE THUNDERSTORM WATCH 344...
VALID 032047Z - 032215Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 344
CONTINUES.
SUMMARY...BROKEN LINE OF STRONG TO LOCALLY SEVERE STORMS DEVELOPING
SEWD ACROSS WATCH 344 AT ABOUT 35KT WILL CONTINUE TO PRESENT A
THREAT FOR LOCALLY STRONG TO DAMAGING WINDS AND SOME HAIL.
DISCUSSION...STRONGEST CONVECTION IN THE WATCH WILL MOVE MOVING INTO
THE BIRMINGHAM AREA /JEFFERSON AND NRN SHELBY COUNTIES/ OVER THE
NEXT HOUR. THESE STORMS HAVE HAD A HISTORY OF TOPPLING TREES AND
TAKING DOWN POWER LINES. AN AXIS OF HIGHER DCAPE FROM THIS
CONVECTION SEWD INTO ERN AL SHOULD OCCASIONALLY SUPPORT STRONGER
DOWNBURST WINDS AS THE STORMS CONTINUE TO BE FUELED BY INFLOW OF
STRONG TO MODERATE INSTABILITY FROM THE SW.
MEANWHILE...PRIOR DEEP CONVECTION HAS ACTED TO STABILIZED THE
AIRMASS ACROSS NWRN AL AND THE WATCH WILL LIKELY BE CANCELED ACROSS
A FEW COUNTIES IN THIS AREA.
..CARBIN.. 06/03/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BMX...HUN...
LAT...LON 33678809 34058720 34368693 34598650 34488601 34138585
33968539 33108533 32998674 32958784 33428782 33678809SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 1:11 PM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Clay, Colbert, Coosa and 17 more | 64 min |
| Jun 3, 1:26 PM CDT | Severe Thunderstorm Watch | SPC | Bibb, Blount, Calhoun, Chambers, Chilton, Clay and 27 more | 5 hr |
| Jun 3, 4:39 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Bullock, Chambers, Chilton, Coosa and 11 more | 66 min |
Nearby
Mesoscale Discussions in Alabama, 2012Every mesoscale discussion 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.