Alert archive / Texas / Mesoscale Discussions in 2017
Mesoscale Discussion 971
The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2017, 7:04 PM CDT for 28 counties in Texas. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2017, 7:04 PM CDT (00:04 UTC)
- Expired
- Jun 8, 2017, 8:00 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 28 counties
Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Deaf Smith County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lamb County, TX, Lipscomb County, TX, Lubbock County, TX, Motley County, TX, Ochiltree County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Swisher County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 46 km from the middle of the area, began a volume at 00:03 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.1 hours before the alert went out and 46 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
- 339 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 2782 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
817
ACUS11 KWNS 090004
SWOMCD
SPC MCD 090004
TXZ000-090100-
Mesoscale Discussion 0971
NWS Storm Prediction Center Norman OK
0704 PM CDT Thu Jun 08 2017
Areas affected...Portions of the TX Panhandle
Concerning...Severe potential...Watch likely
Valid 090004Z - 090100Z
Probability of Watch Issuance...95 percent
SUMMARY...Isolated thunderstorms are increasing in intensity across
the TX Panhandle. Large hail and damaging winds are the main threats
with this activity. Watch will be needed soon based on radar trends.
DISCUSSION...Isolated convection that has struggled to intensify
most of the afternoon/early evening has recently strengthened along
an outflow boundary from prior thunderstorms in Moore and Hansford
counties in the TX Panhandle. Latest radar trends indicate the
supercell storm in Moore county in particular show the potential for
large to very large (2+ inch) hail, along with a damaging wind
threat. The environment across this region remains favorable for
storm organization, as veering/strengthening winds with height per
KAMA VWP are supporting 40-45 kt of effective bulk shear per 00Z RAP
Mesoanalysis. Supercell modes will be favored with this initial
development. There will be some potential for clustering of this
isolated activity to develop southward along a low-level moisture
gradient across the central TX Panhandle, which would increase the
damaging wind threat through the evening. Based on the latest radar
trends it appears a Severe Thunderstorm Watch will be needed soon.
..Gleason/Weiss.. 06/09/2017
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LUB...AMA...
LAT...LON 33530210 34010274 34660293 34960289 35500207 36130160
36470134 36410015 34170015 33610082 33530210SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 7:18 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 24 more | 5 hr |
| Jun 8, 9:38 PM CDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Briscoe, Castro, Childress, Collingsworth and 10 more | 67 min |
| Jun 9, 4:58 PM CDT | Mesoscale Discussion | SPC | Bandera, Blanco, Burnet, Comal, Edwards, Gillespie and 10 more | 3 hr |
Nearby
Mesoscale Discussions in Texas, 2017Every mesoscale discussion in 2017
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.