Alert archive / Texas / Mesoscale Discussions in 2017
Mesoscale Discussion 1223
The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2017, 5:02 PM CDT for Harmon County, Oklahoma; 21 counties in Texas. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Jul 3, 2017, 5:02 PM CDT (22:02 UTC)
- Expired
- Jul 3, 2017, 6:30 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 22 counties
Harmon County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Deaf Smith County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Lamb County, TX, Motley County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Swisher County, TX
The radar
The Amarillo radar (KAMA), 86 km from the middle of the area, began a volume at 22:05 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 10.0 hours before the alert went out and 85 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
- 821 J/kg
- Mixed-layer CIN
- -324 J/kg
- Mixed-layer LCL
- 2010 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
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 |
|---|---|---|---|---|
| Jul 3, 3:01 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Coal, McCurtain, Pushmataha | 2 hr |
| Jul 3, 2:53 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 20 more | 2 hr |
| Jul 3, 3:24 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 27 more | 9 hr |
| Jul 3, 5:37 PM CDT | Severe Thunderstorm Watch | SPC | Cotton, Harmon, Jackson, Jefferson, Tillman | 7 hr |
Nearby
Mesoscale Discussions in Texas, 2017Mesoscale Discussions in Oklahoma, 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.