Alert archive / Texas / Mesoscale Discussions in 2013
Mesoscale Discussion 166
The Storm Prediction Center issued this mesoscale discussion at Feb 18, 2013, 1:29 PM CST for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 18, 2013, 1:29 PM CST (19:29 UTC)
- Expired
- Feb 18, 2013, 3:30 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 53 counties
Clark County, AR, Columbia County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Webster Parish, LA, LeFlore County, OK, McCurtain County, OK, Sequoyah County, OK, Anderson County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Delta County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Houston County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Nacogdoches County, TX, Panola County, TX, Rains County, TX, Red River County, TX, Rusk County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 115 km from the middle of the area, began a volume at 19:32 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
Shreveport, LA (KSHV), launched 12:00Z, 7.5 hours before the alert went out and 116 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
- 668 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 510 m²/s²
- 0-3 km storm-relative helicity
- 670 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 2:19 PM CST | Severe Thunderstorm Watch | SPC | Arkansas, Bradley, Calhoun, Carroll, Clark, Cleveland and 42 more | 7 hr |
| Feb 18, 3:52 PM CST | Mesoscale Discussion | SPC | Calhoun, Clark, Columbia, Conway, Dallas, Garland and 15 more | 83 min |
| Feb 18, 4:54 PM CST | Mesoscale Discussion | SPC | Arkansas, Desha, Drew, Independence, Jackson, Jefferson and 7 more | 66 min |
| Feb 18, 5:59 PM CST | Mesoscale Discussion | SPC | Bradley, Calhoun, Cleveland, Columbia, Dallas, Jefferson and 5 more | 91 min |
| Feb 18, 2:08 PM CST | Mesoscale Discussion | SPC | Beauregard, De Soto, Natchitoches, Red River, Sabine, Vernon | 67 min |
| Feb 18, 5:06 PM CST | Mesoscale Discussion | SPC | Sabine | 84 min |
Nearby
Mesoscale Discussions in Texas, 2013Mesoscale Discussions in Arkansas, 2013Mesoscale Discussions in Louisiana, 2013Every mesoscale discussion in 2013
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.