Alert archive / West Virginia / Special Weather Statements in 2018

Special Weather Statement, NWS Charleston, WV

August 18, 2018Boone County, Logan County, Mingo County, West Virginia

NWS Charleston, WV issued this special weather statement at Aug 18, 2018, 11:32 AM EDT for Boone County, Logan County, Mingo County, West Virginia. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 18, 2018, 11:32 AM EDT (15:32 UTC)
Expired
Aug 18, 2018, 12:30 PM EDT
In force
58 min
Issued by
NWS Charleston, WV

Counties Boone County, WV, Logan County, WV, Mingo County, WV

The radar

The Charleston,WV radar (KRLX), 66 km from the middle of the area, began a volume at 15:34 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 nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 3.5 hours before the alert went out and 230 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.

Skew-T log-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2018-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 212 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2018-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
212 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
783 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, WV wrote its last area forecast discussion before this special weather statement went out at Aug 18, 5:55 AM EDT, 5 hours 37 minutes earlier.

Area forecast discussion, Aug 18, 5:55 AM EDT, 5 hours 37 minutes before
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Aug 18, 2:17 AM EDT, 9 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Charleston WV
217 AM EDT Sat Aug 18 2018

KYZ101>103-105-OHZ066-067-075-076-083>087-VAZ003-004-WVZ005>011-
013>020-024>034-039-040-515>526-190630-
Greenup-Carter-Boyd-Lawrence KY-Perry-Morgan-Athens-Washington-
Jackson OH-Vinton-Meigs-Gallia-Lawrence OH-Dickenson-Buchanan-Wayne-
Cabell-Mason-Jackson WV-Wood-Pleasants-Tyler-Lincoln-Putnam-Kanawha-
Roane-Wirt-Calhoun-Ritchie-Doddridge-Mingo-Logan-Boone-Clay-Braxton-
Gilmer-Lewis-Harrison-Taylor-McDowell-Wyoming-Upshur-Barbour-
Northwest Raleigh-Southeast Raleigh-Northwest Fayette-
Southeast Fayette-Northwest Nicholas-Southeast Nicholas-
Northwest Webster-Southeast Webster-Northwest Pocahontas-
Southeast Pocahontas-Northwest Randolph-Southeast Randolph-
217 AM EDT Sat Aug 18 2018

This Hazardous Weather Outlook is for northeast Kentucky, southeast
Ohio, southwest Virginia and much of West Virginia.

.DAY ONE...Today and Tonight.

Localized heavy rainfall from repeated showers and thunderstorms
over the same location could lead to flash flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

SPOTTER INFORMATION STATEMENT

Weather spotters are encouraged to report significant weather
conditions by calling the toll-free spotter hotline, or by other
methods detailed at www.weather.gov/rlx/reports.

In the hours before

Special weather statement, Aug 18, 11:32 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service Charleston WV
1132 AM EDT SAT AUG 18 2018

WVZ005-015-024>026-034-515-517-181630-
Wyoming-Northwest Raleigh-Boone-Kanawha-Logan-Wayne-Mingo-Northwest
Fayette-
1132 AM EDT SAT AUG 18 2018

...AN AREA OF SLOW MOVING SHOWERS AND THUNDERSTORMS WILL AFFECT
MINGO...SOUTHEASTERN KANAWHA...NORTHWESTERN RALEIGH...NORTHWESTERN
WYOMING...SOUTH CENTRAL WAYNE...LOGAN...WEST CENTRAL FAYETTE AND
BOONE COUNTIES...

At 1125 AM EDT, radar indicated an area of showers and thunderstorms
with moderate to heavy rainfall was located along a line extending
from 6 miles south of Chesapeake to near Oppy. Movement was east at
15 mph. The heavier pockets of rainfall are resulting in 0.5" to
1.0" in an hour. These showers and storms are slow moving, so three
hour totals are in the 1.5-2.0" range. Excessive runoff from heavy
rainfall will cause elevated levels on small creeks and streams, and
ponding of water on country roads and farmland along the banks of
creeks and streams. If multiple heavy showers move across the same
area, a flash flood warning may be needed.

Locations impacted include...
Williamson, Madison, Logan, Chesapeake, Oceana, Belle, Chapmanville,
Man, Delbarton, Van, Gilbert Creek, Mount Gay-Shamrock, Mallory,
Burnwell, South Williamson, Hinch, Hanover, R.d. Bailey Lake, Bald
Knob and Chief Logan State.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 West Virginia Turnpike between mile markers 60 and 88.
 Route 119 between mile markers 1 and 52.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to travel across
flooded roads. Find alternate routes. It takes only a few inches of
swiftly flowing water to carry vehicles away.

LAT...LON 3755 8197 3753 8205 3755 8213 3765 8218
      3763 8221 3767 8229 3774 8233 3776 8231
      3781 8240 3788 8242 3792 8248 3803 8194
      3803 8191 3804 8195 3825 8150 3801 8125
      3784 8138 3757 8171 3755 8186 3751 8193
TIME...MOT...LOC 1525Z 262DEG 15KT 3812 8154 3786 8233

16

The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 17, 8:29 PM EDTSpecial Weather StatementRLXClay46 min
Aug 17, 8:39 PM EDTSpecial Weather StatementRLXBoone36 min
Aug 17, 9:10 PM EDTSpecial Weather StatementRLXNicholas50 min
Aug 18, 12:52 PM EDTFlash Flood WarningRLXDoddridge, Ritchie3 hr
Aug 18, 1:26 PM EDTFlash Flood WarningRLXBoone, Fayette, Kanawha6 hr
Aug 18, 1:38 PM EDTSpecial Weather StatementRLXWayne52 min
Aug 18, 2:10 PM EDTSpecial Weather StatementRLXWood65 min
Aug 18, 2:39 PM EDTSpecial Weather StatementRLXKanawha51 min
Aug 18, 3:09 PM EDTSpecial Weather StatementRLXPutnam51 min
Aug 18, 3:43 PM EDTSpecial Weather StatementRLXPutnam47 min
Aug 18, 4:06 PM EDTFlash Flood WarningRLXKanawha, Putnam2 hr
Aug 18, 4:18 PM EDTFlash Flood WarningRLXBoone, Lincoln, Logan, Mingo, Wayne2 hr
Aug 18, 4:47 PM EDTSpecial Weather StatementRLXWayne58 min
Aug 18, 3:39 PM EDTSpecial Weather StatementRLXBoyd, Carter, Greenup66 min

Nearby

Special Weather Statements in West Virginia, 2018Every special weather statement in 2018

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.