Alert archive / Texas / Mesoscale Discussions in 2016
Mesoscale Discussion 699
The Storm Prediction Center issued this mesoscale discussion at May 23, 2016, 8:58 PM CDT for 11 counties in Oklahoma; 23 counties in Texas. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 23, 2016, 8:58 PM CDT (01:58 UTC)
- Expired
- May 23, 2016, 10:30 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 34 counties
Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Kent County, TX, King County, TX, Lipscomb County, TX, Motley County, TX, Roberts County, TX, Stonewall County, TX, Wheeler County, TX
The radar
The Altus AFB radar (KFDR), 149 km from the middle of the area, began a volume at 02:02 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 2.0 hours before the alert went out and 156 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
- 61 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 3551 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
413
ACUS11 KWNS 240159
SWOMCD
SPC MCD 240158
OKZ000-KSZ000-TXZ000-240330-
MESOSCALE DISCUSSION 0699
NWS STORM PREDICTION CENTER NORMAN OK
0858 PM CDT MON MAY 23 2016
AREAS AFFECTED...ERN TX PANHANDLE...NWRN TX...WRN OK
CONCERNING...TORNADO WATCH 199...200...
VALID 240158Z - 240330Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 199...200...CONTINUES.
SUMMARY...CONVECTIVE TRENDS OVERALL ARE DECREASING...ALTHOUGH
ISOLATED INSTANCES OF LARGE HAIL...STRONG WIND GUSTS...AND A TORNADO
REMAIN POSSIBLE. WW 199 AND 200 ARE SCHEDULED TO EXPIRE AT 03Z...AND
TRENDS WILL CONTINUE TO BE MONITORED FOR POSSIBLE LOCAL EXTENSION OR
NEW WW ISSUANCE.
DISCUSSION...CONVECTIVE TRENDS ARE DECREASING ACROSS THE LOWER
ROLLING PLAINS OF NW TX AND ERN TX PANHANDLE...ALTHOUGH ISOLATED
STRONGER CORES ARE PERSISTING WITH HAIL REMAINING THE PRIMARY
THREAT. ONE EXCEPTION IS WITH A NEARLY STATIONARY STORM OVER
WOODWARD COUNTY OK...WITH A RECENT HISTORY OF PRODUCING A
TORNADO...AND THIS APPEARS TO BE INTERACTING WITH REMNANTS OF AN
EARLIER OUTFLOW BOUNDARY WHICH HAS STALLED NEARBY. STRENGTHENING OF
THE LLJ MAY RESULT IN PERSISTENCE OF A FEW STRONGER TSTMS PAST WATCH
EXPIRATION TIME OF 03Z...BUT THE LOSS OF DIURNAL HEATING AND
INCREASE IN CINH ARE SUPPORTING A GENERAL DOWNWARD TREND IN TSTM
COVERAGE/INTENSITY. HOWEVER...CONVECTIVE TRENDS WILL CONTINUE TO BE
MONITORED THROUGH 03Z...FOR THE POSSIBILITY OF A LOCAL EXTENSION IN
TIME...OR A NEW WW IF A MORE WIDESPREAD THREAT BECOMES APPARENT.
..ROGERS.. 05/24/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...DDC...SJT...LUB...AMA...MAF...
LAT...LON 36809861 34159938 32810030 32770090 33130158 35360151
36530061 36920013 37129940 37109889 36809861SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 11:22 PM CDT | Mesoscale Discussion | SPC | Beckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more | 83 min |
| May 23, 11:45 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Custer, Ellis, Greer, Harmon, Jackson and 4 more | 5 hr |
| May 24, 1:25 PM CDT | Mesoscale Discussion | SPC | Garfield, Kay, Kingfisher, Logan, Major, Noble and 3 more | 2 hr |
| May 24, 2:31 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Ellis, Harper, Roger Mills, Woodward | 119 min |
| May 24, 3:22 PM CDT | Tornado Watch | SPC | Beaver, Beckham, Ellis, Harper, Roger Mills, Texas and 2 more | 9 hr |
| May 24, 4:27 PM CDT | Mesoscale Discussion | SPC | Cherokee, Creek, Haskell, Latimer, Lincoln, McIntosh and 8 more | 63 min |
| May 24, 4:43 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Coal, Creek, Haskell, Hughes, Latimer and 16 more | 7 hr |
| May 24, 6:14 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Ellis, Harper, Roger Mills | 91 min |
Nearby
Mesoscale Discussions in Texas, 2016Mesoscale Discussions in Oklahoma, 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.