Alert archive / Oklahoma / Mesoscale Discussions in 2018
Mesoscale Discussion 1673
The Storm Prediction Center issued this mesoscale discussion at Nov 30, 2018, 9:52 PM CST for 25 counties in Oklahoma; 12 counties in Texas. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Nov 30, 2018, 9:52 PM CST (03:52 UTC)
- Expired
- Nov 30, 2018, 11:15 PM CST
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 37 counties
Adair County, OK, Atoka County, OK, Bryan County, OK, Cherokee County, OK, Choctaw County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Collin County, TX, Dallas County, TX, Delta County, TX, Fannin County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Van Zandt County, TX
The radar
The Norman radar (KTLX), 161 km from the middle of the area, began a volume at 03:56 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 00:00Z, 3.9 hours before the alert went out and 164 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
- 946 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 798 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 244 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 5.7
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 |
|---|---|---|---|---|
| Nov 30, 6:17 PM CST | Mesoscale Discussion | SPC | McCurtain | 58 min |
| Nov 30, 6:35 PM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Canadian, Carter, Cherokee, Choctaw and 44 more | 85 min |
| Nov 30, 6:40 PM CST | Tornado Watch | SPC | McCurtain | 7 hr |
| Nov 30, 9:02 PM CST | Mesoscale Discussion | SPC | McCurtain | 58 min |
| Nov 30, 11:20 PM CST | Mesoscale Discussion | SPC | Adair, Cherokee, Choctaw, Craig, Delaware, Haskell and 7 more | 85 min |
| Nov 30, 10:32 PM CST | Mesoscale Discussion | SPC | Bell, Burnet, Ellis, Falls, Freestone, Henderson and 8 more | 88 min |
| Dec 1, 12:58 AM CST | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Gregg, Harrison, Marion and 4 more | 2 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.