Alert archive / Texas / Mesoscale Discussions in 2021
Mesoscale Discussion 613
The Storm Prediction Center issued this mesoscale discussion at May 14, 2021, 6:06 PM CDT for 9 counties in Texas. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- May 14, 2021, 6:06 PM CDT (23:06 UTC)
- Expired
- May 14, 2021, 7:30 PM CDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 169
Counties Armstrong County, TX, Carson County, TX, Castro County, TX, Deaf Smith County, TX, Hale County, TX, Lamb County, TX, Potter County, TX, Randall County, TX, Swisher County, TX
The radar
The Amarillo radar (KAMA), 67 km from the middle of the area, began a volume at 23:10 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, 11.1 hours before the alert went out and 67 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
- 51 J/kg
- Mixed-layer CIN
- -519 J/kg
- Mixed-layer LCL
- 807 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 364 m²/s²
- 0-3 km storm-relative helicity
- 385 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
818
ACUS11 KWNS 142306
SWOMCD
SPC MCD 142306
TXZ000-150030-
Mesoscale Discussion 0613
NWS Storm Prediction Center Norman OK
0606 PM CDT Fri May 14 2021
Areas affected...TX Panhandle
Concerning...Severe Thunderstorm Watch 169...
Valid 142306Z - 150030Z
The severe weather threat for Severe Thunderstorm Watch 169
continues.
SUMMARY...Severe wind threat should increase between now and 0030Z,
as ongoing strong storms consolidate and move eastward. A few
significant gusts (65 kt or greater) will be possible.
DISCUSSION...At 23Z, numerous strong/potentially severe storms are
ongoing across the western TX Panhandle. MLCAPE of 1000-1500 J/kg
and effective shear of 30-40 kt will continue to support organized
structures, with a short-term risk of locally severe downbursts and
perhaps some hail.
With numerous strong storms ongoing upstream of a relatively warm
and well-mixed environment, some upscale growth is expected within
the next hour as cold pools begin to consolidate. As this occurs, a
swath of potentially more widespread severe wind gusts could develop
into the central TX Panhandle between now and 0030Z, in conjunction
with an eastward-moving cluster that may evolve into a loosely
organized MCS. A few significant (65 kt or greater) gusts will be
possible depending on how well any upscale growth can organize.
..Dean.. 05/14/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LUB...AMA...
LAT...LON 34360276 35060261 35730241 35760153 35340131 34580137
34120156 33970223 34070274 34360276SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 4:30 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Dallam and 19 more | 7 hr |
| May 14, 5:17 PM CDT | Mesoscale Discussion | SPC | Brewster, Culberson, Jeff Davis, Loving, Presidio, Reeves and 2 more | 88 min |
Nearby
Mesoscale Discussions in Texas, 2021Every mesoscale discussion in 2021
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.