Alert archive / Oklahoma / Mesoscale Discussions in 2012
Mesoscale Discussion 293
The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2012, 3:55 PM CDT for 4 counties in Arkansas; McDonald County, Missouri; 20 counties in Oklahoma. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Mar 19, 2012, 3:55 PM CDT (20:55 UTC)
- Expired
- Mar 19, 2012, 5:30 PM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 25 counties
Benton County, AR, Crawford County, AR, Sebastian County, AR, Washington County, AR, McDonald County, MO, Adair County, OK, Atoka County, OK, Bryan County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK, Wagoner County, OK
The radar
The Tulsa radar (KINX), 119 km from the middle of the area, began a volume at 20:57 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
Norman, OK (KOUN), launched 12:00Z, 8.9 hours before the alert went out and 159 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
- 974 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 637 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 334 m²/s²
- 0-3 km storm-relative helicity
- 407 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 4.0
The text
As transmitted, in the capitals the NWS used until 2016.
344
ACUS11 KWNS 192055
SWOMCD
SPC MCD 192055
ARZ000-MOZ000-OKZ000-TXZ000-192230-
MESOSCALE DISCUSSION 0293
NWS STORM PREDICTION CENTER NORMAN OK
0355 PM CDT MON MAR 19 2012
AREAS AFFECTED...SOUTH-CENTRAL/EASTERN OK TO ADJACENT PARTS OF
NORTHWEST AR/SOUTHWEST MO
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 192055Z - 192230Z
CONCERN EXISTS FOR AN INCREASING SEVERE THREAT INTO PORTIONS OF
SOUTH-CENTRAL/SOUTHEAST OK AS WELL AS ADDITIONAL PORTIONS OF EASTERN
OK AND EVENTUALLY NORTHWEST AR/SOUTHWEST MO LATE THIS
AFTERNOON/EVENING. A WATCH COULD BE NEEDED SOON ESPECIALLY FOR
PORTIONS OF SOUTH-CENTRAL/SOUTHEAST OK. HEAVY RAINFALL WILL REMAIN
LIKELY AS WELL.
OUTFLOW BOUNDARY CONTINUES TO SLOWLY PROGRESS EASTWARD ACROSS
NORTHEAST AND SOUTH-CENTRAL/SOUTHEAST OK AND INTO NORTH TX AT
MID-AFTERNOON. BEAR/JUST BEHIND THIS OUTFLOW BOUNDARY...A HYBRID
BOW/SUPERCELL ONGOING ACROSS NORTH-CENTRAL TX /WISE COUNTY AS OF
2045Z/ MAY CONTINUE TO SPREAD NORTHEASTWARD AND POSE A SEVERE THREAT
INITIALLY INTO SOUTH-CENTRAL/SOUTHEAST OK. GIVEN THAT STORMS MAY
SPREAD INTO OK ALONG/JUST BEHIND THE OUTFLOW WITHIN A HIGHLY SHEARED
ENVIRONMENT...A WATCH COULD BE NEEDED FOR AN INCREASING CONCERN OF
DAMAGING WINDS/HAIL AND PERHAPS A TORNADO.
..GUYER.. 03/19/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...SHV...TSA...FWD...OUN...
LAT...LON 33899717 35299626 36429530 36839437 35499396 33969534
33899717SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 19, 4:20 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 5 hr |
| Mar 19, 6:32 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Madison, Sebastian, Washington | 58 min |
| Mar 19, 6:53 PM CDT | Tornado Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 5 hr |
| Mar 19, 3:40 PM CDT | Mesoscale Discussion | SPC | Adair, Caldwell, Carroll, Chariton, Daviess, Grundy and 12 more | 95 min |
| Mar 18, 7:37 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Ellis, Greer, Harmon, Jackson and 2 more | 53 min |
| Mar 18, 9:10 PM CDT | Mesoscale Discussion | SPC | Beckham, Ellis, Greer, Harmon, Jackson, Roger Mills and 2 more | 35 min |
| Mar 18, 11:37 PM CDT | Mesoscale Discussion | SPC | Beaver, Ellis, Harper | 53 min |
| Mar 19, 1:37 AM CDT | Mesoscale Discussion | SPC | Beckham, Greer, Harmon, Jackson, Roger Mills | 83 min |
| Mar 19, 1:56 AM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 19 more | 4 hr |
| Mar 19, 3:34 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 21 more | 86 min |
| Mar 19, 10:05 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Cleveland, Coal, Garvin and 15 more | 115 min |
| Mar 19, 2:15 PM CDT | Mesoscale Discussion | SPC | Bryan, Love, Marshall | 90 min |
Nearby
Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Arkansas, 2012Mesoscale Discussions in Missouri, 2012Every mesoscale discussion in 2012
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.