Alert archive / Oklahoma / Mesoscale Discussions in 2012
Mesoscale Discussion 236
The Storm Prediction Center issued this mesoscale discussion at Mar 8, 2012, 2:54 PM CST for 20 counties in Oklahoma. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Mar 8, 2012, 2:54 PM CST (20:54 UTC)
- Expired
- Mar 8, 2012, 4:00 PM CST
- In force
- 66 min
- Issued by
- the Storm Prediction Center
Counties Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Stephens County, OK
The radar
The Norman radar (KTLX), 126 km from the middle of the area, began a volume at 20:55 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, 8.9 hours before the alert went out and 124 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
- 9 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 405 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 195 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
811
ACUS11 KWNS 082055
SWOMCD
SPC MCD 082054
OKZ000-TXZ000-082200-
MESOSCALE DISCUSSION 0236
NWS STORM PREDICTION CENTER NORMAN OK
0254 PM CST THU MAR 08 2012
AREAS AFFECTED...S-CNTRL AND SERN OK
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 082054Z - 082200Z
AN ISOLATED/MARGINAL THREAT FOR SVR HAIL WILL EXIST OVER PORTIONS OF
SRN OK. A WW IS NOT ANTICIPATED.
2030Z RADAR LOOP SHOWS INTENSIFICATION OF ISOLATED ELEVATED TSTMS
OVER SRN OK. THIS IS OCCURRING WITHIN A BROAD WARM ADVECTION
ZONE...ROOTED NEAR 1.5-2 KM AGL AND AIDED BY 30 KTS OF SWLY FLOW
/PER REGIONAL VWP DATA/. WITH STEEP MIDLEVEL LAPSE RATES IN PLACE /7
DEG C PER KM/ AND EFFECTIVE SHEAR VALUES NEAR 50 KTS...AN ISOLATED
THREAT FOR SVR HAIL WILL ACCOMPANY ORGANIZED/STRONGER UPDRAFTS.
HOWEVER...THIS THREAT APPEARS TO BE RELATIVELY CONFINED TO AREAS
ALONG AND IMMEDIATELY N OF THE RED RIVER...WHERE MIDLEVEL THERMAL
GRADIENT AND FOCUSED AREA OF ISENTROPIC ASCENT APPEAR TO BE
MAXIMIZED /PER 20Z RUC OBJECTIVE ANALYSIS/. ADDITIONALLY...ELEVATED
INSTABILITY BECOMES INCREASINGLY MORE MARGINAL WITH NWD
PROGRESSION...WITH TSTMS RAPIDLY MOVING N-NEWD INTO AN ENVIRONMENT
LESS FAVORABLE FOR LARGE HAIL PRODUCTION. GIVEN THESE
FACTORS...COVERAGE AND INTENSITY APPEAR TOO MARGINAL TO WARRANT
ISSUANCE OF A WW ATTM.
..ROGERS.. 03/08/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SHV...TSA...FWD...OUN...
LAT...LON 33909508 33799621 33889742 34039809 34259845 34799829
35119778 35149698 35069632 35049589 34779515 34429460
34039464 33909508SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 7:36 PM CST | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 22 more | 84 min |
| Mar 8, 10:19 AM CST | Mesoscale Discussion | SPC | Bryan, Choctaw, McCurtain, Pushmataha | 56 min |
Nearby
Mesoscale Discussions in Oklahoma, 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.