Alert archive / Texas / Mesoscale Discussions in 2008
Mesoscale Discussion 2021
The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2008, 9:25 PM CDT for 26 counties in Texas. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2008, 9:25 PM CDT (02:25 UTC)
- Expired
- Aug 3, 2008, 10:30 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 26 counties
Anderson County, TX, Bosque County, TX, Camp County, TX, Cherokee County, TX, Dallas County, TX, Ellis County, TX, Falls County, TX, Freestone County, TX, Gregg County, TX, Henderson County, TX, Hill County, TX, Johnson County, TX, Kaufman County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Rockwall County, TX, Rusk County, TX, Smith County, TX, Somervell County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 114 km from the middle of the area, began a volume at 02:27 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
Fort Worth, TX (KFWD), launched 00:00Z, 2.4 hours before the alert went out and 127 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
- 108 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 3046 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 040226 SWOMCD SPC MCD 040225 TXZ000-040330- MESOSCALE DISCUSSION 2021 NWS STORM PREDICTION CENTER NORMAN OK 0925 PM CDT SUN AUG 03 2008 AREAS AFFECTED...NERN TX CONCERNING...SEVERE THUNDERSTORM WATCH 802... VALID 040225Z - 040330Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 802 CONTINUES. ISOLATED DAMAGING WIND THREAT MAY CONTINUE WITH WWD PROPAGATING TSTM CLUSTERS FOR ANOTHER HOUR OR SO PRIOR TO STRENGTHENING OF BOUNDARY LAYER DECOUPLING AND WANING OF OVERALL CONVECTIVE INTENSITY. AS OF 0215Z...TWO PRIMARY CLUSTERS OF CONVECTIVE ACTIVITY IN NERN TX WERE CONCENTRATED JUST E OF ACT AND NEAR GGG. WWD PROPAGATION HAS BEEN SUPPORTED BY 25-30 KT E/NELY MID-LEVEL FLOW PER UPSTREAM VAD/PROFILER DATA...WITH CONVECTIVE OUTFLOW INTERSECTIONS LENDING TO RENEWED UPDRAFTS. OVERALL WEAKENING TREND OF CONVECTIVE INTENSITY HAS RECENTLY COMMENCED WITH THE ACTIVITY NEAR GGG...PERHAPS A RESULT OF BOUNDARY LAYER DECOUPLING AND INCREASING SURFACE-BASED CIN. WITH THIS TREND APT TO CONTINUE AND A DRIER BOUNDARY LAYER EXISTING FARTHER WEST TOWARDS THE I-35 CORRIDOR /PER 00Z FWD RAOB/...MUCH OF WW 802 MAY BE CLEARED PRIOR TO SCHEDULED EXPIRATION TIME OF 05Z. ..GRAMS.. 08/04/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SHV...HGX...FWD... 33129441 31749442 31349534 31179689 31229752 31629786 32359780 32899698 33119620
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.