Alert archive / Oklahoma / Mesoscale Discussions in 2016
Mesoscale Discussion 201
The Storm Prediction Center issued this mesoscale discussion at Mar 13, 2016, 12:35 PM CDT for 5 counties in Arkansas; 7 counties in Oklahoma. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2016, 12:35 PM CDT (17:35 UTC)
- Expired
- Mar 13, 2016, 1:30 PM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
Counties Howard County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sevier County, AR, Coal County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, Pittsburg County, OK, Pushmataha County, OK
The radar
The Western Arkansas radar (KSRX), 101 km from the middle of the area, began a volume at 17:35 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
Shreveport, LA (KBAD), launched 12:00Z, 5.6 hours before the alert went out and 243 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
- 781 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
976
ACUS11 KWNS 131736
SWOMCD
SPC MCD 131735
ARZ000-OKZ000-131830-
MESOSCALE DISCUSSION 0201
NWS STORM PREDICTION CENTER NORMAN OK
1235 PM CDT SUN MAR 13 2016
AREAS AFFECTED...ERN OK/WRN AR
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 131735Z - 131830Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...THUNDERSTORMS ARE EXPECTED TO DEVELOP SOON ACROSS
ECNTRL/SERN OK. LARGE HAIL...AND A FEW TORNADOES ARE THE PRIMARY
THREATS. WW WILL LIKELY BE REQUIRED SOON.
DISCUSSION...EXIT REGION OF UPPER JET IS SHIFTING ACROSS OK TOWARD
WRN AR. COMPACT CYCLONE WITH WELL-DEFINED DRY SLOT HAS DEVELOPED
OVER SCNTRL OK. BOUNDARY LAYER LAPSE RATES ARE STEEPENING ACROSS
SCNTRL OK WHERE SFC-3KM LAPSE RATES ARE NOW IN EXCESS OF 8 C/KM. CU
FIELD IS EXPANDING IN AREAL COVERAGE IMMEDIATELY AHEAD OF SFC LOW
OVER PONTOTOC COUNTY AND ROBUST VERTICAL UPDRAFTS SHOULD MATURE INTO
TSTMS OVER THE NEXT 1-2 HOURS. SUPERCELLS ARE EXPECTED AND LARGE
HAIL IS LIKELY. IN ADDITION...A FEW TORNADOES CAN BE EXPECTED.
..DARROW/HART.. 03/13/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LZK...SHV...TSA...OUN...
LAT...LON 33929503 34569636 35369615 35389472 34859378 34129358
33669401 33929503SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 12:57 PM CDT | Tornado Watch | SPC | Crawford, Franklin, Sebastian | 6 hr |
| Mar 13, 1:01 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 17 more | 89 min |
| Mar 13, 2:10 PM CDT | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 37 more | 5 hr |
| Mar 13, 3:19 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 31 more | 86 min |
| Mar 13, 5:35 PM CDT | Mesoscale Discussion | SPC | Crawford, Franklin, Sebastian, Washington | 85 min |
| Mar 13, 5:58 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 38 more | 92 min |
| Mar 13, 6:41 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 40 more | 94 min |
Nearby
Mesoscale Discussions in Oklahoma, 2016Mesoscale Discussions in Arkansas, 2016Every mesoscale discussion in 2016
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.