Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 87
The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2018, 4:09 AM CST for 24 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2018, 4:09 AM CST (10:09 UTC)
- Expired
- Feb 24, 2018, 6:15 AM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 24 counties
Bell County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Comanche County, TX, Coryell County, TX, Erath County, TX, Falls County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, Lampasas County, TX, Limestone County, TX, Llano County, TX, Mason County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, San Saba County, TX, Somervell County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 90 km from the middle of the area, began a volume at 10:10 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
Fort Worth, TX (KFWD), launched 00:00Z, 10.2 hours before the alert went out and 177 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
- 467 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 329 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| Feb 24, 6:17 AM CST | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Collin, Cooke, Denton and 9 more | 118 min |
| Feb 24, 10:26 AM CST | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Delta, Franklin, Hopkins and 8 more | 64 min |
| Feb 24, 11:01 AM CST | Tornado Watch | SPC | Bowie, Camp, Cass, Delta, Franklin, Gregg and 12 more | 8 hr |
| Feb 24, 1:39 PM CST | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Delta, Franklin, Gregg and 10 more | 2 hr |
| Feb 24, 5:29 PM CST | Mesoscale Discussion | SPC | Angelina, Nacogdoches, Sabine, San Augustine, Shelby | 91 min |
Nearby
Mesoscale Discussions in Texas, 2018Every mesoscale discussion in 2018
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.