Alert archive / Oklahoma / Mesoscale Discussions in 2012
Mesoscale Discussion 950
The Storm Prediction Center issued this mesoscale discussion at May 28, 2012, 9:51 PM CDT for 8 counties in Oklahoma. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- May 28, 2012, 9:51 PM CDT (02:51 UTC)
- Expired
- May 28, 2012, 10:45 PM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
Counties Canadian County, OK, Creek County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Oklahoma County, OK, Pawnee County, OK, Payne County, OK
The radar
The Norman radar (KTLX), 71 km from the middle of the area, began a volume at 02:53 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
Lamont, OK (KLMN), launched 00:00Z, 2.9 hours before the alert went out and 74 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3235 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
654
ACUS11 KWNS 290252
SWOMCD
SPC MCD 290251
OKZ000-290345-
MESOSCALE DISCUSSION 0950
NWS STORM PREDICTION CENTER NORMAN OK
0951 PM CDT MON MAY 28 2012
AREAS AFFECTED...CNTRL OK
CONCERNING...SEVERE THUNDERSTORM WATCH 310...
VALID 290251Z - 290345Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 310
CONTINUES.
SUMMARY...SEVERE TSTM ACROSS CNTRL OK ARE EXPECTED TO CONTINUE FOR
THE NEXT FEW HOURS.
DISCUSSION...TSTMS CONTINUE TO INITIATE ALONG NUMEROUS OUTFLOW
BOUNDARIES AND A SWD PROGRESSING COLD FRONT ACROSS CNTRL OK. COPIOUS
INSTABILITY HAS ALLOWED STORMS TO QUICKLY DEVELOP AND PRODUCE SEVERE
HAIL BEFORE BECOMING OUTFLOW DOMINATED. THIS TREND IS EXPECTED TO
CONTINUE...WITH STORMS BEGINNING TO FAVOR A MORE SWD/SEWD
PROPAGATION INTO AN INSTABILITY AXIS LOCATED FROM MURRAY COUNTY NEWD
INTO TULSA COUNTY. DEVELOPMENT N OF THE CURRENT LINE OF STORMS DOES
NOT APPEAR LIKELY AS THIS AREA HAS BEEN STABILIZED BY THE COLD
FRONT. ORGANIZATION OF THE SWD/SEWD PROPAGATING TSTMS INTO A SEVERE
CONVECTIVE LINE DOES NOT APPEAR LIKELY AS OUTFLOW DOMINATED STORMS
ARE STILL EXPECTED. THEREFORE...THE PRIMARY THREAT APPEARS TO BE
SEVERE HAIL WITH A LOW POTENTIAL FOR MARGINALLY SEVERE WIND GUSTS.
..MOSIER.. 05/29/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...TSA...OUN...
LAT...LON 36219832 36389757 36399641 36209621 35539640 35309758
35459844 36219832SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 7:44 PM CDT | Mesoscale Discussion | SPC | Bryan, Carter, Coal, Garvin, Hughes, Johnston and 7 more | 91 min |
| May 28, 11:06 PM CDT | Mesoscale Discussion | SPC | Craig, Nowata, Osage, Ottawa, Washington | 54 min |
| May 29, 3:06 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Blaine, Caddo, Canadian, Cleveland and 28 more | 84 min |
| May 29, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Atoka, Blaine, Bryan, Caddo, Canadian and 38 more | 12 hr |
| May 29, 6:47 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 31 more | 88 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.