Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 898
The Storm Prediction Center issued this mesoscale discussion at May 25, 2012, 6:34 PM CDT for Clark County, Comanche County, Seward County, Kansas; 9 counties in Oklahoma; 15 counties in Texas. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- May 25, 2012, 6:34 PM CDT (23:34 UTC)
- Expired
- May 25, 2012, 7:30 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 27 counties
Clark County, KS, Comanche County, KS, Seward County, KS, Beaver County, OK, Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Roger Mills County, OK, Woodward County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX, Wilbarger County, TX
The radar
The Amarillo radar (KAMA), 150 km from the middle of the area, began a volume at 23:34 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 12:00Z, 11.6 hours before the alert went out and 149 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
- 4729 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
181
ACUS11 KWNS 252334
SWOMCD
SPC MCD 252334
OKZ000-TXZ000-KSZ000-260030-
MESOSCALE DISCUSSION 0898
NWS STORM PREDICTION CENTER NORMAN OK
0634 PM CDT FRI MAY 25 2012
AREAS AFFECTED...ERN TX PANHANDLE...FAR WRN OK...FAR SW KS
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 252334Z - 260030Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...SEVERE THUNDERSTORM DEVELOPMENT IS POSSIBLE ACROSS THE ERN
TX PANHANDLE INTO WRN OK AND SW KS. INCREASING TRENDS OF CONVECTIVE
SUGGESTS PORTIONS A WW WILL LIKELY BE NEEDED.
DISCUSSION...CONVECTIVE INITIATION HAS OCCUR INVOF A WWD RETREATING
DRYLINE ACROSS PORTIONS OF THE ERN TX PANHANDLE.
ADDITIONALLY...LATEST WATER VAPOR IMAGERY DEPICTS A SMALL VORTICITY
MAXIMUM EJECTING NWD/NEWD ACROSS THE SRN PLAINS WHICH IS LIKELY
AIDING IN LIFT ACROSS THE AREA. 23Z SFC MESOANALYSIS INDICATES
MLCAPE VALUES AOA 2000 J/KG ACROSS MUCH OF THIS AREA WITH LITTLE TO
NO CINH REMAINING. HOWEVER...20Z MOBILE SOUNDING FROM TEXAS A&M TEAM
NEAR ALTUS HAD SUBSTANTIAL CAPPING. THEREFORE...THERE IS SOME
QUESTION AS TO HOW LONG THE ACTIVITY WILL LAST BUT GIVEN THE RECENT
TRENDS A WW WILL LIKELY BE NEEDED.
..MOSIER/HART.. 05/25/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...DDC...LUB...AMA...
LAT...LON 34100095 33770046 33819972 33889914 34229906 35039911
35899918 36739923 37209918 37249979 37170113 37130126
36890124 36210115 34100095SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 3:57 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ellsworth and 19 more | 2 hr |
| May 25, 6:48 PM CDT | Tornado Watch | SPC | Barton, Ellis, Ellsworth, Lincoln, Mitchell, Ness and 6 more | 5 hr |
| May 25, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Clark, Comanche, Edwards, Ford, Gray and 6 more | 5 hr |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Kansas, 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.