Alert archive / West Virginia / Mesoscale Discussions in 2012
Mesoscale Discussion 372
The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2012, 12:43 PM EDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 28, 2012, 12:43 PM EDT (16:43 UTC)
- Expired
- Mar 28, 2012, 2:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 77 counties
Bath County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Floyd County, KY, Greenup County, KY, Johnson County, KY, Knott County, KY, Lawrence County, KY, Lee County, KY, Lewis County, KY, Magoffin County, KY, Martin County, KY, Mason County, KY, Menifee County, KY, Morgan County, KY, Pike County, KY, Powell County, KY, Rowan County, KY, Wolfe County, KY, Allegany County, MD, Garrett County, MD, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Scioto County, OH, Bath County, VA, Frederick County, VA, Highland County, VA, Shenandoah County, VA, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Marion County, WV, Mason County, WV, Mineral County, WV, Mingo County, WV, Monongalia County, WV, Nicholas County, WV, Pendleton County, WV, Pleasants County, WV, Pocahontas County, WV, Preston County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 93 km from the middle of the area, began a volume at 16:45 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
Roanoke, VA (KRNK), launched 12:00Z, 4.7 hours before the alert went out and 198 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
- 1288 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 296 m²/s²
- 0-3 km storm-relative helicity
- 269 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
564
ACUS11 KWNS 281643
SWOMCD
SPC MCD 281643
VAZ000-WVZ000-MDZ000-PAZ000-OHZ000-KYZ000-281845-
MESOSCALE DISCUSSION 0372
NWS STORM PREDICTION CENTER NORMAN OK
1143 AM CDT WED MAR 28 2012
AREAS AFFECTED...FAR SOUTHERN OH/EASTERN KY AND MUCH OF WV AND
ADJACENT VA/MD
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 281643Z - 281845Z
A SEVERE THREAT IS EXPECTED TO STEADILY INCREASE THROUGH EARLY/MID
AFTERNOON ACROSS PORTIONS OF FAR SOUTHERN OH AND ESPECIALLY INTO
EASTERN KY/MUCH OF WV AND ADJACENT PARTS OF VA/MD. A WATCH WILL
LIKELY BE NECESSARY FOR MUCH OF THIS REGION THIS AFTERNOON.
ELEVATED STRONG/SOME MARGINALLY SEVERE TSTMS WITH HAIL CONTINUE TO
OCCUR NEAR THE OH/WV/PA BORDER REGION EARLY THIS AFTERNOON...AND
THESE STORMS MAY BECOME MORE SURFACE BASED OVER THE NEXT COUPLE OF
HOURS AS THE BOUNDARY LAYER CONTINUES TO WARM. FARTHER
SOUTHWEST...ADDITIONAL SURFACE BASED DEVELOPMENT SHOULD OCCUR ACROSS
PORTIONS OF FAR SOUTHERN OH INTO EASTERN KY/MUCH OF WV THIS
AFTERNOON. IN THIS CORRIDOR...CINH CONTINUES TO QUICKLY ERODE
THROUGH MIXING...WITH MOIST ADVECTION ALSO OCCURRING VIA THE
EASTWARD ADVECTION OF A RELATIVELY HIGHER MOIST PLUME ALONG THE
LOWER OH RIVER PER GPS/SATELLITE DERIVED PW. ACCORDINGLY...RECENT
VISIBLE SATELLITE IMAGERY IS INDICATIVE OF AN INCREASE IN BOUNDARY
LAYER CUMULUS ACROSS EASTERN KY TO CENTRAL WV TO THE SOUTHEAST OF
THE COLD FRONT/ZONE OF CONFLUENCE.
GIVEN THIS SCENARIO...RELATIVELY HIGH CONFIDENCE EXISTS IN AN
AFTERNOON UPSWING OF SURFACE BASED TSTM COVERAGE AND INTENSITY. EVEN
WITH MODEST BOUNDARY LAYER MOISTURE /GENERALLY 50S F SFC
DEWPOINTS/...ADDITIONAL HEATING/MOIST ADVECTION OVER THE NEXT FEW
HOURS WILL ALLOW FOR MLCAPES TO REACH 1000+ J/KG ESPECIALLY
ALONG/WEST OF THE APPALACHIANS SPINE. WITH THE REGION ON THE
SOUTHERN PERIPHERY OF STRONG WESTERLY FLOW ALOFT...STRONG/NEARLY
UNIDIRECTIONAL LOW/MID TROPOSPHERIC FLOW WILL ALLOW FOR SOME
SPLITTING SUPERCELLS WITH EAST-SOUTHEASTWARD MOVING LINE SEGMENTS
OTHERWISE MORE COMMON. DAMAGING WINDS/SEVERE HAIL WILL BE THE
PRIMARY HAZARDS.
..GUYER.. 03/28/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CTP...LWX...RNK...PBZ...RLX...JKL...ILN...LMK...
LAT...LON 39027827 37987972 37278273 37608387 38598384 39248237
39857960 39537823 39027827SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 2:06 PM EDT | Severe Thunderstorm Watch | SPC | Anderson, Bath, Bourbon, Boyd, Boyle, Bracken and 64 more | 7 hr |
| Mar 28, 4:37 PM EDT | Mesoscale Discussion | SPC | Adair, Anderson, Bath, Bourbon, Boyd, Boyle and 53 more | 113 min |
| Mar 28, 10:23 AM EDT | Mesoscale Discussion | SPC | Allegany, Frederick, Garrett, Montgomery, Washington | 2 hr |
Nearby
Mesoscale Discussions in West Virginia, 2012Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Ohio, 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.