Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 382
The Storm Prediction Center issued this mesoscale discussion at Mar 29, 2012, 5:27 PM CDT for 7 counties in Texas. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Mar 29, 2012, 5:27 PM CDT (22:27 UTC)
- Expired
- Mar 29, 2012, 6:30 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
Counties Aransas County, TX, Kenedy County, TX, Kleberg County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Willacy County, TX
The radar
The Corpus Christi radar (KCRP), 37 km from the middle of the area, began a volume at 22:29 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
Corpus Christi, TX (KCRP), launched 12:00Z, 10.5 hours before the alert went out and 27 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
- 1823 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 626 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
961
ACUS11 KWNS 292227
SWOMCD
SPC MCD 292227
TXZ000-292330-
MESOSCALE DISCUSSION 0382
NWS STORM PREDICTION CENTER NORMAN OK
0527 PM CDT THU MAR 29 2012
AREAS AFFECTED...S TX COASTAL PLAIN
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 292227Z - 292330Z
ISOLATED TSTMS HAVE DEVELOPED ALONG A SLOW-MOVING SEA BREEZE
BOUNDARY OVER THE S TX COASTAL PLAIN. SPARSE COVERAGE WILL PRECLUDE
WW ISSUANCE...BUT AN ISOLATED THREAT FOR SVR HAIL AND A DMGG WIND
GUST WILL PERSIST THROUGH THE EARLY EVENING. NEARLY STATIONARY
STORMS WILL ALSO PRODUCE HEAVY RAINFALL RATES.
RADAR MOSAIC COMPOSITE IMAGERY SHOWS ISOLATED TSTMS HAVE DEVELOPED
ALONG A SEA BREEZE BOUNDARY SLOWLY MOVING WWD ACROSS THE S TX
COASTAL PLAIN. MOIST BOUNDARY LAYER CONDITIONS AND STEEP MIDLEVEL
LAPSE RATES HAVE CONTRIBUTED TO MLCAPE VALUES AOA 2500 J/KG.
ADDITIONALLY...S-SELY LOW-LEVEL WINDS OF 10-20 KTS POSITIONED
BENEATH MODERATE WLY MIDLEVEL FLOW IS YIELDING 0-6 KM BULK SHEAR
NEAR 30 KTS /PER CRP/BRO VWP DATA/...SUFFICIENT FOR ROTATING TSTMS.
THESE ENVIRONMENTAL CONDITIONS WILL REMAIN FAVORABLE FOR THE
PRODUCTION OF ISOLATED SVR HAIL AND A FEW DMGG WIND GUSTS.
ADDITIONALLY...WITH NEARLY STATIONARY STORM MOTIONS BEING
OBSERVED...HEAVY RAINFALL RATES /EXCEEDING 2 INCHES PER HR WITH THE
STRONGEST STORMS/ MAY OCCUR. A GRADUAL DECREASE IN TSTM INTENSITY IS
EXPECTED AFTER 00Z...AS DIURNAL COOLING AND INCREASING CINH LEAD TO
A WANING SVR THREAT.
..ROGERS.. 03/29/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CRP...BRO...
LAT...LON 28189664 27769716 27039741 26569731 26319735 26189759
26349800 27279813 27969790 28399762 28669698 28579662
28189664SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 4:50 PM CDT | Mesoscale Discussion | SPC | Hemphill, Lipscomb | 55 min |
| Mar 29, 5:57 PM CDT | Mesoscale Discussion | SPC | Coke, Crockett, Irion, Nolan, Reagan, Schleicher and 2 more | 63 min |
Nearby
Mesoscale Discussions in Texas, 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.