Alert archive / Texas / Mesoscale Discussions in 2011
Mesoscale Discussion 1139
The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2011, 5:18 PM CDT for 13 counties in Oklahoma; 24 counties in Texas. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2011, 5:18 PM CDT (22:18 UTC)
- Expired
- Jun 8, 2011, 6:15 PM CDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 37 counties
Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Borden County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Howard County, TX, Kent County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Mitchell County, TX, Motley County, TX, Scurry County, TX, Stonewall County, TX, Wheeler County, TX
The radar
The Altus AFB radar (KFDR), 123 km from the middle of the area, began a volume at 22:22 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 10.3 hours before the alert went out and 152 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
- 3828 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
007
ACUS11 KWNS 082219
SWOMCD
SPC MCD 082218
OKZ000-TXZ000-KSZ000-082315-
MESOSCALE DISCUSSION 1139
NWS STORM PREDICTION CENTER NORMAN OK
0518 PM CDT WED JUN 08 2011
AREAS AFFECTED...ERN TX/OK PANHANDLES...ROLLING PLAINS OF W/NW
TX...WRN OK...FAR S-CNTRL KS
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 082218Z - 082315Z
A THREAT FOR ISOLD DMGG WIND GUSTS WILL INCREASE OVER THE NEXT FEW
HRS. A WW IS NOT ANTICIPATED.
A VERY HOT AND WELL-MIXED BOUNDARY LAYER HAS DEVELOPED THIS
AFTERNOON ACROSS W TX INTO WRN OK...WITH A WEAK SFC LOW POSITIONED
JUST N OF GAG AND A DIFFUSE/WEAKLY CONVERGENT DRYLINE PROTRUDING SWD
INTO THE ROLLING PLAINS OF W TX. RECENT VISIBLE SATELLITE IMAGERY
SHOWS INCREASING CU ORIENTED ALONG/NEAR THE DRYLINE...BUT MORE
ROBUST VERTICAL GROWTH HAS BEEN LIMITED THUS FAR BY THE PRESENCE OF
CINH. WITH THE APPROACH OF PEAK DIABATIC HEATING...COMBINED WITH
WEAKLY CONVERGENT LOW-LEVEL FLOW ALONG THE DRYLINE...THE POTENTIAL
FOR ISOLATED THUNDERSTORMS TO DEVELOP SHOULD INCREASE OVER THE NEXT
FEW HRS. THIS SCENARIO IS ALSO SUPPORTED BY THE 19Z EXPERIMENTAL
WRF-HRRR AND 12Z WRF-NMM MODEL SOLUTIONS. DESPITE STEEP MIDLEVEL
LAPSE RATES /EXCEEDING 8 DEG C/KM/ AND VERY HOT SFC
TEMPERATURES...MODEST BOUNDARY LAYER MOISTURE WILL ONLY YIELD SBCAPE
VALUES BTWN 500-1000 J/KG. GIVEN DEEPLY-MIXED/INVERTED-V BOUNDARY
LAYER THERMODYNAMIC PROFILES...A THREAT FOR DMGG DOWNBURST WIND
GUSTS WILL LIKELY ACCOMPANY ANY THUNDERSTORM DEVELOPMENT.
..ROGERS.. 06/08/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...DDC...SJT...LUB...AMA...MAF...
LAT...LON 36889884 34679889 32590015 31810120 31740176 33600142
36100048 36880013 37109957 37089919 36889884Nearby
Mesoscale Discussions in Texas, 2011Mesoscale Discussions in Oklahoma, 2011Every mesoscale discussion in 2011
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.