Alert archive / Texas / Mesoscale Discussions in 2008
Mesoscale Discussion 2016
The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2008, 5:27 PM CDT for 14 counties in Texas. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2008, 5:27 PM CDT (22:27 UTC)
- Expired
- Aug 3, 2008, 6:30 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
Counties Anderson County, TX, Cherokee County, TX, Freestone County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Houston County, TX, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, Smith County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 111 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 10.5 hours before the alert went out and 120 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
- 397 J/kg
- Mixed-layer CIN
- -465 J/kg
- Mixed-layer LCL
- 1402 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 032228 SWOMCD SPC MCD 032227 LAZ000-TXZ000-032330- MESOSCALE DISCUSSION 2016 NWS STORM PREDICTION CENTER NORMAN OK 0527 PM CDT SUN AUG 03 2008 AREAS AFFECTED...ERN TX CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 032227Z - 032330Z LINE OF CONVECTION ORIGINATING IN WRN LA HAS BEEN INTENSIFYING IN THE WAKE OF EARLIER CONVECTION THAT IS NOW NEAR NWRN HOUSTON. STORMS WILL GRADUALLY BUILD NWWD OF THE ONGOING CONVECTION...WHILE STORMS DEVELOPING IN NWRN LA MAY MOVE SWWD INTO THE SAME AREA. MULTICELLULAR CLUSTERS AND PULSE TYPE STORMS WILL BE CAPABLE OF DMGG WINDS AND HAIL UP TO ONE INCH. AREA IS BEING MONITORED FOR A POSSIBLE WW. AIRMASS BEHIND INITIAL LINE OF CONVECTION LOCATED NEAR HOUSTON HAS QUICKLY DESTABILIZED ONCE AGAIN...WHILE AREAS IN FAR NERN TX HAVE NOT YET BEEN OVERTURNED BY CONVECTION/COLD POOLS. AS SHOWN IN LATEST RADAR TRENDS...WWD EXTENT OF CURRENT CONVECTION WILL CONTINUE TO DEVELOP NWWD INTO THE UNSTABLE AIRMASS. TEMPERATURES NEAR 100 DEGREES AT THE SURFACE AND DEW POINTS IN THE LOW TO MID 60S ARE INDICATIVE OF STEEP LOW LEVEL LAPSE RATES AND DEEPLY MIXED LOW LEVELS...WHICH WILL BE SUPPORTIVE OF STG/SVR DOWNBURST WINDS. STORMS DEVELOPING IN NWRN LA WILL MOVE SWWD INTO THE AFOREMENTIONED UNSTABLE AREA...EVENTUALLY ALLOWING FOR STORM MERGERS...NEW DEVELOPMENT...AND THE POTENTIAL FOR HEAVY RAINFALL IN ADDITION TO WIND/HAIL THREAT. ..HURLBUT.. 08/03/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SHV...HGX...FWD... 32389400 31249490 31179565 31759636 32669583 32759556 32899526 32909487 32799450 32689424
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 10:50 AM CDT | Mesoscale Discussion | SPC | Angelina, Chambers, Hardin, Jasper, Jefferson, Liberty and 9 more | 55 min |
| Aug 3, 1:07 PM CDT | Severe Thunderstorm Watch | SPC | Angelina, Austin, Brazoria, Brazos, Burleson, Chambers and 26 more | 7 hr |
| Aug 3, 4:21 PM CDT | Mesoscale Discussion | SPC | Angelina, Austin, Chambers, Colorado, Fort Bend, Grimes and 18 more | 54 min |
| Aug 3, 6:44 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Camp, Cass, Cherokee, Delta, Ellis and 25 more | 3 hr |
Nearby
Mesoscale Discussions in Texas, 2008Every mesoscale discussion in 2008
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.