Alert archive / Kentucky / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 108, NWS Charleston, WV

September 2, 2018Boyd County, Greenup County, Kentucky

NWS Charleston, WV issued this severe thunderstorm warning at Sep 2, 2018, 4:08 PM EDT for Boyd County, Greenup County, Kentucky. It was in force for 34 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
Sep 2, 2018, 4:08 PM EDT (20:08 UTC)
Expired
Sep 2, 2018, 4:42 PM EDT
In force
34 min
Issued by
NWS Charleston, WV
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Boyd County, KY, Greenup County, KY

The radar

The Charleston,WV radar (KRLX), 94 km from the middle of the area, began a volume at 20:07 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.1 hours before the alert went out and 136 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, Cncnati-Daytn, OH at 12:00Z on 2018-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 308 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, Cncnati-Daytn, OH at 12:00Z on 2018-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 square meters per square second.1939Sfc1 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
308 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
1164 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
-31 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

567 
WUUS51 KRLX 022008
SVRRLX
KYC019-089-022100-
/O.NEW.KRLX.SV.W.0108.180902T2008Z-180902T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston WV
Issued by National Weather Service Pittsburgh PA
408 PM EDT SUN SEP 2 2018

The National Weather Service in Charleston West Virginia has issued a

* Severe Thunderstorm Warning for...
  Northwestern Boyd County in northeastern Kentucky...
  Southeastern Greenup County in northeastern Kentucky...

* Until 500 PM EDT.

* At 408 PM EDT, a severe thunderstorm was located over Naples, or
  near Cannonsburg, and is nearly stationary.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and power lines, resulting in some power 
           outages.

* Locations impacted include...
  Ashland, Ironton, Greenup, Naples, Flatwoods, Russell, Raceland,
  Worthington, Wurtland, Bellefonte, Westwood, Hanging Rock and
  Summit.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

Please report Severe Weather to the National Weather Service by
calling toll free, 800 401 9535, when you can do so safely.

You may also report severe weather by posting your report to the
Charleston West Virginia National Weather Service Facebook Page, or
by using the Twitter Hashtag, NWSRLX.

&&

LAT...LON 3857 8282 3856 8278 3856 8272 3849 8265
      3839 8275 3841 8283
TIME...MOT...LOC 2008Z 198DEG 3KT 3843 8278 

HAIL...1.00IN
WIND...60MPH
 
$$

Kistner
2 follow-up statements
788 
WWUS51 KRLX 022026
SVSRLX

Severe Weather Statement
National Weather Service Charleston WV
Issued by National Weather Service Pittsburgh PA
426 PM EDT SUN SEP 2 2018

KYC019-022036-
/O.CAN.KRLX.SV.W.0108.000000T0000Z-180902T2100Z/
Boyd KY-
426 PM EDT SUN SEP 2 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BOYD COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3857 8282 3856 8278 3856 8273 3855 8271
      3851 8267 3843 8277 3844 8281
TIME...MOT...LOC 2026Z 198DEG 3KT 3845 8277 

$$

KYC089-022100-
/O.CON.KRLX.SV.W.0108.000000T0000Z-180902T2100Z/
Greenup KY-
426 PM EDT SUN SEP 2 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTHEASTERN GREENUP COUNTY...

At 426 PM EDT, a severe thunderstorm was located over Naples, or near
Cannonsburg, and is nearly stationary.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and power lines, resulting in some power 
         outages.

Locations impacted include...
Greenup, Naples, Flatwoods, Russell, Raceland, Worthington, Wurtland,
Bellefonte and Hanging Rock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

Please report Severe Weather to the National Weather Service by
calling toll free, 800 401 9535, when you can do so safely.

You may also report severe weather by posting your report to the
Charleston West Virginia National Weather Service Facebook Page, or
by using the Twitter Hashtag, NWSRLX.

&&

LAT...LON 3857 8282 3856 8278 3856 8273 3855 8271
      3851 8267 3843 8277 3844 8281
TIME...MOT...LOC 2026Z 198DEG 3KT 3845 8277 

HAIL...1.00IN
WIND...60MPH
 
$$

Kistner
805 
WWUS51 KRLX 022042
SVSRLX

Severe Weather Statement
National Weather Service Charleston WV
Issued by National Weather Service Pittsburgh PA
442 PM EDT SUN SEP 2 2018

KYC089-022052-
/O.CAN.KRLX.SV.W.0108.000000T0000Z-180902T2100Z/
Greenup KY-
442 PM EDT SUN SEP 2 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GREENUP COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3857 8282 3856 8278 3856 8273 3855 8271
      3851 8267 3843 8277 3844 8281
TIME...MOT...LOC 2036Z 198DEG 3KT 3846 8276 

$$

KISTNER

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Sep 2, 3:26 PM EDT, 42 minutes earlier.

Area forecast discussion, Sep 2, 3:26 PM EDT, 42 minutes before
Area Forecast Discussion
National Weather Service Charleston WV
Issued by National Weather Service Pittsburgh PA
326 PM EDT Sun Sep 2 2018

.SYNOPSIS...
Very warm and humid as upper ridge remains in charge through
early this week. A cold front approaches late in the week.

&&

.NEAR TERM /THROUGH MONDAY/...
As of 150 PM Sunday...

Latest radar mosaic shows some showers and thunderstorms had
developed over the ridges of the West Virginia mountains. In
addition, storms over eastern Kentucky were moving east into our
western counties. Outside of the precipitation, skies were
generally mostly sunny.

The showers and storms should continue this afternoon with
overall coverage and intensity less than what occurred on
Saturday.

Storms will dissipate shortly early this evening with skies
becoming mostly clear. As a result, expect dense fog will
develop in the valleys as well as any location that sees rain
today.

With high pressure in charge, the areal coverage of diurnal
storms that develop should be less than today with the scattered
storms possible across the northern and central mountain
counties. It will be hot again on Monday with temperatures in
the lower 90s across moist of the lowlands with 80s in the
mountains and even some 70s in the highest elevations.

Combination of these temperatures and abundant low-level
moisture will result in heat indices in the mid to upper 90s
across the lowlands. Would not be too surprised to see some
scattered locations reaching or even exceeding 100 degrees.

&&

.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY NIGHT/...
As of 315 PM Sunday...

Big bubble of high pressure will be overhead through at least
the middle of this week. Early September heat wave will be the
result, with high temps soaring into the low 90s and possibly
topping out at 95 at the warmest locations Tuesday and
Wednesday. Will continue to highlight the heat in the HWO for
now, but advisories may be needed at a later time.

Thunderstorms will be possible in the mountains around the
period of max heating on Tuesday. Although precip chances drop
on Wednesday, can't rule out isolated shower or storms once
again in the afternoon hours. Of course, with high pressure
aloft, updrafts will have a very tough time punching through the
dry air, so expecting limited coverage only in late afternoon
and clear/very warm overnight.

&&

.LONG TERM /THURSDAY THROUGH SUNDAY/...
As of 320 PM Sunday...

Strong ridging will finally slide southward toward the end of
the week. This will open the door for a quasi stationary
boundary to slowly drift southward on Thursday into Friday and
finally settle over our area. This front will be the focus for
more widespread showers and thunderstorms right into next
weekend, but at least there will be some relief from the heat.

&&

.AVIATION /19Z SUNDAY THROUGH FRIDAY/...
As of 150 PM Sunday...

A few storms with IFR conditions will be possible across the
mountains and coalfields through 23Z.

After sunset, expect VFR conditions with only some mid or high
level clouds. Dense valley fog with IFR conditions will once
again form after 06Z. Other locations that see rain this
afternoon could also see MVFR conditions in fog.

Any fog that does form overnight should quickly dissipate after
12Z with VFR conditions across the entire area. A few mountain
storms may develop late in the period.

FORECAST CONFIDENCE: Medium.

ALTERNATE SCENARIOS: May need brief TEMPOs for -TSRA. Fog
coverage in question for 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.

AFTER 18Z MONDAY...

&&

.RLX WATCHES/WARNINGS/ADVISORIES...
WV...None.
OH...None.
KY...None.
VA...None.

&&

SYNOPSIS...JSH/MPK
NEAR TERM...JSH
SHORT TERM...MPK/99
LONG TERM...MPK/99
AVIATION...JSH
Hazardous weather outlook, Sep 2, 2:42 AM EDT, 13 hours 26 minutes before
Hazardous Weather Outlook
National Weather Service Charleston WV
Issued by National Weather Service Pittsburgh PA
242 AM EDT Sun Sep 2 2018

KYZ101>103-105-OHZ066-067-075-076-083>087-WVZ005>011-013>019-024>026-
030645-
Greenup-Carter-Boyd-Lawrence KY-Perry-Morgan-Athens-Washington-
Jackson OH-Vinton-Meigs-Gallia-Lawrence OH-Wayne-Cabell-Mason-
Jackson WV-Wood-Pleasants-Tyler-Lincoln-Putnam-Kanawha-Roane-Wirt-
Calhoun-Ritchie-Mingo-Logan-Boone-
242 AM EDT Sun Sep 2 2018

This Hazardous Weather Outlook is for northeast Kentucky, southeast
Ohio, and portions of central West Virginia, northern West
Virginia, southern West Virginia and western West Virginia.

.DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Heat indices in the mid to upper 90s are expected Monday and Tuesday
afternoon for portions of southeast Ohio, northeast Kentucky, and
the lowlands of West Virginia.

.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.

VAZ003-004-WVZ020-027>034-039-040-515>526-030645-
Dickenson-Buchanan-Doddridge-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-
242 AM EDT Sun Sep 2 2018

This Hazardous Weather Outlook is for southwest Virginia, and
portions of central West Virginia, northeast West Virginia,
northern West Virginia, southeast West Virginia and southern West
Virginia.

.DAY ONE...Today and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

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.

Nearby

Severe Thunderstorm Warnings in Kentucky, 2018Every severe thunderstorm warning 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.