Alert archive / Texas / Mesoscale Discussions in 2017
Mesoscale Discussion 968
The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2017, 3:38 PM CDT for Morton County, Stevens County, Kansas; Beaver County, Ellis County, Texas County, Oklahoma; 22 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2017, 3:38 PM CDT (20:38 UTC)
- Expired
- Jun 8, 2017, 5:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 27 counties
Morton County, KS, Stevens County, KS, Beaver County, OK, Ellis County, OK, Texas County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 60 km from the middle of the area, began a volume at 20:38 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 12:00Z, 8.6 hours before the alert went out and 60 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
- 144 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 825 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 244 m²/s²
- 0-3 km storm-relative helicity
- 359 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
454
ACUS11 KWNS 082038
SWOMCD
SPC MCD 082038
OKZ000-TXZ000-KSZ000-082245-
Mesoscale Discussion 0968
NWS Storm Prediction Center Norman OK
0338 PM CDT Thu Jun 08 2017
Areas affected...Southwest Kansas into the Oklahoma and Texas
Panhandles
Concerning...Severe potential...Watch possible
Valid 082038Z - 082245Z
Probability of Watch Issuance...60 percent
SUMMARY...Isolated severe thunderstorms capable of mainly large hail
are expected to form between 22-23Z.
DISCUSSION...Visible imagery shows outflow boundaries from southwest
KS into the eastern OK panhandle, and across the eastern TX
panhandle. South and west of these boundaries, the air mass
continues to heat with temperatures in to the mid 80s and with
dewpoints ranging from the 50s to the lower 60s. These aggregate
outflows are also reflected in the surface pressure fields with a
meso high over south central KS and north west OK. This in turn will
likely maintain southeasterly surface winds through evening, aiding
in overall shear profiles.
One or more storms are expected to form across southwest KS into the
OK panhandle prior to 00Z, with other sporadic activity possibly
developing out of the TX panhandle CU field as well west through
southeast of Amarillo. Modest northwesterly flow aloft atop the
low-level southeasterlies may support southward-moving cells,
perhaps supercellular at times, with large hail of 1.50-2.00" the
primary threat.
With time, activity may merge with a possible outflow or MCS
developing southeastward out of NM.
..Jewell/Guyer.. 06/08/2017
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...OUN...DDC...LUB...AMA...
LAT...LON 34820278 35310251 36140217 36790202 37330185 37450145
37280100 36890060 36730029 36369964 35699981 34630002
34280006 34180033 34200112 34210188 34410259 34820278SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 7:11 PM CDT | Mesoscale Discussion | SPC | Greeley, Hamilton, Logan, Sherman, Wallace, Wichita | 3 hr |
Nearby
Mesoscale Discussions in Texas, 2017Mesoscale Discussions in Oklahoma, 2017Mesoscale Discussions in Kansas, 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.