Alert archive / West Virginia / Special Weather Statements in 2018
Special Weather Statement, NWS Charleston, WV
NWS Charleston, WV issued this special weather statement at Aug 6, 2018, 3:37 PM EDT for Boone County, West Virginia. It was in force for 23 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 6, 2018, 3:37 PM EDT (19:37 UTC)
- Expired
- Aug 6, 2018, 4:00 PM EDT
- In force
- 23 min
- Issued by
- NWS Charleston, WV
County Boone County, WV
The radar
The Charleston,WV radar (KRLX), 29 km from the middle of the area, began a volume at 19:42 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, 7.6 hours before the alert went out and 206 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
- 49 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1269 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>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 6, 1:59 PM EDT, 1 hour 38 minutes earlier.
Area forecast discussion, Aug 6, 1:59 PM EDT, 1 hour 38 minutes before
Area Forecast Discussion National Weather Service Charleston WV 159 PM EDT Mon Aug 6 2018 .SYNOPSIS... High pressure lingers today. A cold front and upper trough will bring more heavy rainfall through at least mid week. && .NEAR TERM /THROUGH TUESDAY/... As of 200 PM Monday... Latest WV imagery and model information suggest a weak shortwave trof was moving across eastern KY at this time. Showers and storms have developed in the unstable airmass to the east of the shortwave. Expect Heat indices to be in the low to mid 90s across the lowlands this afternoon. The 18 UTC observation for Point Pleasant WV indicates a temperature of 93 with a dewpoint of 73 degrees yielding a Heat Index of 103 degrees. However, other observations invof Point Pleasant suggests that the temp there is several degrees too high. The shortwave should push east of the area this evening with shower and storm chances decreasing. Expect some valley fog will once again develop tonight in the favored locations as well as locations that receive rainfall today. A stronger shortwave trough and an associated cold front will approach the region from the northwest on Tuesday. These features should combine with the moist unstable airmass to result in increasing chance for showers and storms, especially during the afternoon and evening hours. Latest temperature guidance is very similar to current forecast and plan to only make some tweaks. .SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/... As of 345 AM Monday... Starting Tuesday, we start to see small height falls aloft ahead an approaching upper level and surface trough. Multiple rounds of showers and storms will impact the region Tuesday through frontal passage late Wednesday. Regarding heavy rain, PWAT increases to 1.7-1.8" with pockets as high as 2.0" as moisture converges ahead of the front. Rounds of storms preceding the front will follow low-level convergence zones coinciding with pockets of upper level vorticity - models do favor the Middle Ohio Valley as a focal point for heavy rain, particularly Tuesday night into early Wednesday. The WPC has extended a marginal risk of excessive rainfall into the Middle Ohio Valley to account for this on Tuesday. Will have to closely monitor where heavy rain accumulates through the period for possible flooding, and have kept this risk in the HWO. Stronger winds aloft support a marginal severe threat near the front with unidirectional wind shear on the order of 25-35 kts. Strong and isolated severe wind gusts are the primary concern, although the SPC notes a degree of uncertainty should cloud cover inhibit destabilization in the moisture- laden atmosphere. The surface cold front crosses the area late Wednesday with precipitation decreasing from West to East. Weak high pressure builds into Thursday, but low- level moisture lingers amid northwest flow, so upslope showers remain a possibility through the afternoon. && .LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/... As of 400 AM Monday... Weak high pressure offers a respite from rain Thursday night into Friday, however a squeeze play between a digging northern trough over the Great Lakes and a disturbance moving through the Tennessee River Valley reintroduces unsettled weather for the weekend. The northern stream surface cold front approaches Friday night from the NW with widespread showers and storms on Saturday and Sunday. With any luck, the southern stream system ought to keep the highest moisture to our South - however flooding would still remain a threat with likely-moist antecedent soil condition. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... As of 200 PM Monday... Latest radar mosaic indicates isolated to scattered thunderstorms were developing across the area. Outside of convection, VFR conditions were the rule with MVFR/IFR conditions invof the storms. Expect the storms will continue to develop until around sunset when the activity should begin to decrease. Coverage of activity should be limited and have included VCTS in most TAFs. With area of convection moving towards KCRW from the west, have tried to time the storms impacting that site. Expect more clouds around tonight, but with some breaks may still get some overnight fog with IFR conditions. After 12Z, any fog that developed overnight should quickly dissipate. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 18Z TUESDAY... FORECAST CONFIDENCE: Medium. ALTERNATE SCENARIOS: Brief restrictions in showers/storms possible today. Timing and density of fog may vary tonight. EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY OF WFO FORECAST TO AVAILABLE MODEL INFORMATION: H = HIGH: TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS. L = LOW: TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. UTC 1HRLY 18 19 20 21 22 23 00 01 02 03 04 05 EDT 1HRLY 14 15 16 17 18 19 20 21 22 23 00 01 CRW CONSISTENCY H H H H H H H H H H H H HTS CONSISTENCY H H H H H H H H H H H H BKW CONSISTENCY H H H H H H M H H H H H EKN CONSISTENCY H H H H H H H H H H H H PKB CONSISTENCY H H H H H H H H H H H H CKB CONSISTENCY H H H H H H H H H H H H AFTER 18Z TUESDAY... IFR possible in showers and storms Tuesday afternoon into Wednesday. && .RLX WATCHES/WARNINGS/ADVISORIES... WV...None. OH...None. KY...None. VA...None. && SYNOPSIS...JSH/JS NEAR TERM...JSH SHORT TERM...MC LONG TERM...MC AVIATION...JSH
Hazardous weather outlook, Aug 6, 3:09 AM EDT, 12 hours 28 minutes before
Hazardous Weather Outlook National Weather Service Charleston WV 309 AM EDT Mon Aug 6 2018 KYZ101>103-105-OHZ066-067-075-076-083>087-VAZ003-004-WVZ005>011- 013>020-024>034-039-040-515>526-070715- 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- 309 AM EDT Mon Aug 6 2018 This Hazardous Weather Outlook is for northeast Kentucky, southeast Ohio, southwest Virginia and much of West Virginia. .DAY ONE...Today and Tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Thunderstorms with heavy downpours will be likely Tuesday through Wednesday. Flash flooding will be possible if storms are able to persist over the same areas. .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 6, 3:33 PM EDT, 4 minutes before
Special Weather Statement National Weather Service Charleston WV 333 PM EDT MON AUG 6 2018 VAZ003-004-062000- Dickenson-Buchanan- 333 PM EDT MON AUG 6 2018 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL DICKENSON AND SOUTHWESTERN BUCHANAN COUNTIES... At 332 PM EDT, a strong thunderstorm was located over Davenport, moving northeast at 10 mph. Wind gusts up to 50 mph are possible with this storm. Locations impacted include... Davenport. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. LAT...LON 3708 8216 3710 8222 3722 8215 3716 8204 TIME...MOT...LOC 1932Z 231DEG 10KT 3713 8215 30
Special weather statement, Aug 6, 3:37 PM EDT, 0 minutes before
Special Weather Statement National Weather Service Charleston WV 337 PM EDT MON AUG 6 2018 WVZ015-026-062000- Boone-Kanawha- 337 PM EDT MON AUG 6 2018 ...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL KANAWHA AND NORTHEASTERN BOONE COUNTIES... At 336 PM EDT, a strong thunderstorm was located 9 miles south of Chesapeake, or 13 miles east of Madison, moving east at 15 mph. Wind gusts up to 50 mph are possible with this storm. This may be enough to down small limbs or weakly rooted or diseased trees. Locations impacted include... Burnwell, Seth, Leewood, Dawes, Prenter, Sharon and Eskdale. This includes West Virginia Turnpike near mile marker 68, and between mile markers 76 and 85. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. LAT...LON 3801 8165 3809 8169 3823 8147 3805 8137 TIME...MOT...LOC 1936Z 257DEG 13KT 3809 8156 30
The office that day
Everything else NWS Charleston, WV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 6:24 PM EDT | Special Weather Statement | RLX | Lawrence | 51 min |
| Aug 6, 6:27 PM EDT | Special Weather Statement | RLX | Gallia | 48 min |
| Aug 6, 3:33 PM EDT | Special Weather Statement | RLX | Buchanan | 27 min |
| Aug 6, 3:40 PM EDT | Severe Thunderstorm Warning | RLX | Buchanan | 17 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.