Alert archive / Oklahoma / Mesoscale Discussions in 2014
Mesoscale Discussion 1321
The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2014, 6:06 PM CDT for 15 counties in Oklahoma. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2014, 6:06 PM CDT (23:06 UTC)
- Expired
- Jul 8, 2014, 7:00 PM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
Counties Caddo County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Kiowa County, OK, McClain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK
The radar
The Norman radar (KTLX), 46 km from the middle of the area, began a volume at 23:05 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, 11.1 hours before the alert went out and 37 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2376 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
128
ACUS11 KWNS 082306
SWOMCD
SPC MCD 082306
OKZ000-090000-
MESOSCALE DISCUSSION 1321
NWS STORM PREDICTION CENTER NORMAN OK
0606 PM CDT TUE JUL 08 2014
AREAS AFFECTED...SRN/CNTRL OK
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 082306Z - 090000Z
PROBABILITY OF WATCH ISSUANCE...5 PERCENT
SUMMARY...A LOCALIZED THREAT FOR STRONG-SVR WIND GUSTS AND HAIL WILL
EXIST ACROSS SRN/CNTRL OK THIS EVENING. COVERAGE IS EXPECTED TO
REMAIN INSUFFICIENT FOR A WW.
DISCUSSION...ISOLATED TSTMS HAVE BEEN DEVELOPING ALONG A WEAK COLD
FRONT ORIENTED W-E FROM COMANCHE INTO PONTOTOC COUNTIES. WEAK
DEEP-LAYER FLOW IS LIMITING TSTM ORGANIZATION...WHICH IS REFLECTED
BY PULSE-LIKE APPEARANCE AND GENERATION OF SEVERAL OUTFLOW
BOUNDARIES IN RECENT RADAR IMAGERY. HOWEVER...STRONG HEATING AMIDST
RICH BOUNDARY LAYER MOISTURE HAS YIELDED A MODERATELY UNSTABLE AIR
MASS /MLCAPE VALUES AROUND 1500-2000 J/KG/...AND DEEP INVERTED-V
THERMODYNAMIC PROFILES. AS A RESULT...A THREAT FOR LOCALIZED DMGG
WIND GUSTS VIA STRONG DOWNBURSTS MAY EXIST WITH THESE STORMS...AND
PERHAPS BRIEF OCCURRENCES OF SVR HAIL. ADDITIONAL ISOLATED TSTM
DEVELOPMENT IS LIKELY THE NEXT 1-3 HRS...PRIMARILY ALONG OUTFLOW
BOUNDARIES AND THE WEAK COLD FRONT...BUT THE THREAT FOR DMGG WINDS
SHOULD WANE AFTER SUNSET.
..ROGERS/HART.. 07/08/2014
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...TSA...OUN...
LAT...LON 34669576 34409741 34429832 34519915 34849941 35079931
35449762 35519677 35379603 35189565 34959564 34669576SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 5:15 PM CDT | Mesoscale Discussion | SPC | Adair, Sequoyah | 60 min |
Nearby
Mesoscale Discussions in Oklahoma, 2014Every mesoscale discussion in 2014
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.