Alert archive / Texas / Mesoscale Discussions in 2017
Mesoscale Discussion 55
The Storm Prediction Center issued this mesoscale discussion at Jan 15, 2017, 5:20 PM CST for 30 counties in Texas. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Jan 15, 2017, 5:20 PM CST (23:20 UTC)
- Expired
- Jan 15, 2017, 7:15 PM CST
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 30 counties
Bastrop County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Burnet County, TX, Collin County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Hamilton County, TX, Hays County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, Kaufman County, TX, Lampasas County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Navarro County, TX, Parker County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Travis County, TX, Williamson County, TX, Wise County, TX
The radar
The Ft Hood radar (KGRK), 90 km from the middle of the area, began a volume at 23:22 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
Fort Worth, TX (KFWD), launched 12:00Z, 11.3 hours before the alert went out and 148 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
- 473 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 14, 9:35 PM CST | Mesoscale Discussion | SPC | Carson, Gray, Hansford, Hemphill, Hutchinson, Lipscomb and 4 more | 6 hr |
| Jan 15, 12:57 PM CST | Mesoscale Discussion | SPC | Concho, Crockett, Edwards, Irion, Kimble, McCulloch and 5 more | 3 hr |
| Jan 15, 2:54 PM CST | Severe Thunderstorm Watch | SPC | Bandera, Brown, Callahan, Coke, Coleman, Concho and 26 more | 7 hr |
| Jan 15, 3:00 PM CST | Mesoscale Discussion | SPC | Brazos, Burleson, Falls, Freestone, Leon, Limestone and 5 more | 90 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.