Alert archive / Texas / Mesoscale Discussions in 2017
Mesoscale Discussion 5
The Storm Prediction Center issued this mesoscale discussion at Jan 2, 2017, 3:36 AM CST for 50 counties in Texas. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Jan 2, 2017, 3:36 AM CST (09:36 UTC)
- Expired
- Jan 2, 2017, 4:30 AM CST
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 50 counties
Anderson County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Collin County, TX, Comal County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Gillespie County, TX, Grimes County, TX, Hamilton County, TX, Hays County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, McLennan County, TX, Milam County, TX, Navarro County, TX, Parker County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Travis County, TX, Van Zandt County, TX, Walker County, TX, Washington County, TX, Williamson County, TX, Wise County, TX
The radar
The Ft Hood radar (KGRK), 72 km from the middle of the area, began a volume at 09:39 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
Fort Worth, TX (KFWD), launched 00:00Z, 9.6 hours before the alert went out and 164 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
- 1528 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
263
ACUS11 KWNS 020937
SWOMCD
SPC MCD 020936
TXZ000-021030-
Mesoscale Discussion 0005
NWS Storm Prediction Center Norman OK
0336 AM CST Mon Jan 02 2017
Areas affected...Parts of central and east TX
Concerning...Severe Thunderstorm Watch 1...
Valid 020936Z - 021030Z
The severe weather threat for Severe Thunderstorm Watch 1 continues.
SUMMARY...While thunderstorms have been generally sub-severe so far,
there should be an increasing severe threat as they move eastward
across Severe Thunderstorm Watch 1.
DISCUSSION...Radar trends over the past hour have shown convection
along and behind a cold front across central TX generally remaining
sub-severe. This is primarily due to the strongest cores lagging the
surface front (evident as a radar fine line) and being slightly
elevated. One exception to this is a bowing segment moving across
Erath and Hamilton counties in central TX as of 0935Z. This line
segment will remain capable of producing large hail and damaging
winds (recently reported up to 70 mph in Hamilton, TX) over the next
hour. An increasingly moist and unstable environment downstream of
the front (into east TX) remains favorable for intensification of
ongoing thunderstorms, and additional development along the front
itself. All severe hazards will be possible, although damaging winds
should tend to become the primary threat with time as convection
likely consolidates into a line.
..Gleason.. 01/02/2017
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...HGX...FWD...EWX...
LAT...LON 30159928 30919838 32019832 33599776 33529547 32989572
31789551 30579541 29639682 29609763 30159928SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 10:11 PM CST | Mesoscale Discussion | SPC | Archer, Baylor, Bosque, Brown, Callahan, Coleman and 35 more | 3 hr |
| Jan 2, 1:04 AM CST | Mesoscale Discussion | SPC | Anderson, Austin, Bandera, Bastrop, Bell, Bexar and 71 more | 86 min |
| Jan 2, 1:39 AM CST | Severe Thunderstorm Watch | SPC | Anderson, Austin, Bastrop, Bell, Blanco, Bosque and 67 more | 59 days |
| Jan 2, 2:06 AM CST | Mesoscale Discussion | SPC | Jasper, Newton, Orange, Sabine, San Augustine, Shelby and 1 more | 114 min |
| Jan 2, 5:35 AM CST | Mesoscale Discussion | SPC | Anderson, Angelina, Austin, Brazos, Burleson, Camp and 56 more | 85 min |
| Jan 2, 6:12 AM CST | Tornado Watch | SPC | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 21 more | 10 hr |
| Jan 2, 7:48 AM CST | Mesoscale Discussion | SPC | Angelina, Bowie, Camp, Cass, Chambers, Cherokee and 25 more | 57 min |
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.