Alert archive / Oklahoma / Mesoscale Discussions in 2018
Mesoscale Discussion 1533
The Storm Prediction Center issued this mesoscale discussion at Oct 6, 2018, 4:58 PM CDT for 25 counties in Oklahoma; 11 counties in Texas. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Oct 6, 2018, 4:58 PM CDT (21:58 UTC)
- Expired
- Oct 6, 2018, 6:30 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 36 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Wagoner County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Grayson County, TX, Jack County, TX, Montague County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wise County, TX, Young County, TX
The radar
The Norman radar (KTLX), 126 km from the middle of the area, began a volume at 21:59 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
Norman, OK (KOUN), launched 12:00Z, 10.0 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
- 1086 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 153 m²/s²
- 0-3 km storm-relative helicity
- 161 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 |
|---|---|---|---|---|
| Oct 6, 2:09 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Brewster, Crane, Culberson, Dawson and 17 more | 3 hr |
| Oct 6, 4:04 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Crane, Culberson, Ector, Jeff Davis, Loving and 7 more | 6 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2018Mesoscale 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.