Alert archive / Texas / Mesoscale Discussions in 2023
Mesoscale Discussion 607
The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2023, 9:59 AM CDT for 19 counties in Texas. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Apr 23, 2023, 9:59 AM CDT (14:59 UTC)
- Expired
- Apr 23, 2023, 11:30 AM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 164
Counties Bee County, TX, Brooks County, TX, Cameron County, TX, Duval County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Starr County, TX, Webb County, TX, Willacy County, TX, Zapata County, TX
The radar
The Corpus Christi radar (KCRP), 91 km from the middle of the area, began a volume at 14:59 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
Corpus Christi, TX (KCRP), launched 12:00Z, 3.0 hours before the alert went out and 99 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
- 859 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 722 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 435 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 13.9
The text
As transmitted.
662
ACUS11 KWNS 231459
SWOMCD
SPC MCD 231459
TXZ000-231630-
Mesoscale Discussion 0607
NWS Storm Prediction Center Norman OK
0959 AM CDT Sun Apr 23 2023
Areas affected...South TX
Concerning...Severe Thunderstorm Watch 164...
Valid 231459Z - 231630Z
The severe weather threat for Severe Thunderstorm Watch 164
continues.
SUMMARY...The threat for damaging gust and large hail continues
across south TX.
DISCUSSION...Cluster of severe thunderstorms, anchored by the
supercell moving through Webb County TX, continues to move southward
across south TX. This cluster appeared to be elevated early this
morning, but recent radar trends and observed gusts suggest that a
transition to surface based is underway. A 47 kt gust was recently
observed at LRD.
The downstream air mass is moist and unstable, and the expectation
is for this cluster to persist as it continues southward through
Deep South TX. Strong outflow associated with this cluster will
continue to pose a risk for damaging gusts, while large hail will
remain possible as well.
..Mosier.. 04/23/2023
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CRP...EWX...BRO...
LAT...LON 28109991 28529932 28679796 28419723 28089693 27509668
27029664 26799668 26659667 26299692 26129718 26069768
26139812 26209863 26349918 26769943 27229964 27579986
28109991SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:46 PM CDT | Mesoscale Discussion | SPC | Blanco, Brown, Burnet, Coke, Coleman, Concho and 17 more | 89 min |
| Apr 22, 9:16 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Comal, Dimmit, Edwards and 12 more | 89 min |
| Apr 22, 9:47 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bexar, Blanco, Caldwell, Comal and 21 more | 7 hr |
| Apr 22, 11:34 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Comal, Edwards, Frio and 10 more | 86 min |
| Apr 23, 3:13 AM CDT | Mesoscale Discussion | SPC | Aransas, Atascosa, Bandera, Bee, Bexar, Brooks and 26 more | 2 hr |
| Apr 23, 4:54 AM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Bee, Bexar, Brooks, Calhoun and 28 more | 9 hr |
| Apr 23, 12:54 PM CDT | Mesoscale Discussion | SPC | Cameron, Hidalgo, Kenedy, Starr, Willacy | 66 min |
Nearby
Mesoscale Discussions in Texas, 2023Every mesoscale discussion in 2023
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.