Alert archive / Virginia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 62, NWS Wakefield, VA

June 20, 20184 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Jun 20, 2018, 5:32 PM EDT for 4 counties in Virginia. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 20, 2018, 5:32 PM EDT (21:32 UTC)
Expired
Jun 20, 2018, 6:15 PM EDT
In force
43 min
Issued by
NWS Wakefield, VA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Caroline County, VA, Hanover County, VA, King and Queen County, VA, King William County, VA

The radar

The Norfolk radar (KAKQ), 93 km from the middle of the area, began a volume at 21:35 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, 9.5 hours before the alert went out and 213 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 2018-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 117 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 2018-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
117 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
939 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Wakefield, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 3:57 PM EDT, 1 hour 35 minutes earlier.

Area forecast discussion, Jun 20, 3:57 PM EDT, 1 hour 35 minutes before
Area Forecast Discussion
National Weather Service Wakefield VA
357 PM EDT Wed Jun 20 2018

.SYNOPSIS...
A cold front will approach the area from the north late
tonight. The front pushes south through the area on Thursday,
then stalls over North Carolina Thursday night into Friday. This
front lifts back north as a warm front Friday night into
Saturday.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
As of 400 PM EDT Wednesday...

A quasi-stationary frontal boundary is draped along the coast
from about VA Beach northward up to the Peninsulas. Meanwhile, a
cold front extends across the Ohio Valley. A lee-side trough has
begun to pop tstms across our Piedmont counties which will
propagate eastward into this evening. Additional pulse storms
are found over SE VA and NE NC. Consensus of the CAMS brings
the activity over the Piedmont eastward to the coast as a
broken line thru 00z or so. Additional development (possible
second line of shwrs/tstms) is then shown to cross the region
from late evening to around 2 am Thu. Have trended PoPs through
the evening hours to show possibility of both bouts of
convection, with likely Pops this afternoon/evening to account
for the ongoing activity. Despite SPC slight risk outlook this
afternoon/evening, am not expecting much in the way of severe
storms with effective shear <25 kt and weak lapse rates. Yes,
there can still be an isolated downburst with the strongest
storms, but the majority will just feature heavy rain due to
PW'S ~2.0". Warm and muggy overnight with lows in the 70s.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/...
As of 400 PM EDT Wednesday...

A cold front sags south through the area on Thursday, settling
near the VA/NC border late. Best chc of showers/tstms will shift
into central/srn VA/NE NC (50-60% PoPs), with 30-40% PoPs NE.
Highs Thursday will be in the mid/upper 80s to low 90s (around
80F for the immediate Atlantic MD coast). By Friday, high
pressure builds over coastal New England resulting in onshore
flow, with the aforementioned frontal boundary remaining
stationary across north-central or NE NC. Will generally have
highest PoPs (50-70%) across central/southern VA into NE NC
Thursday night, perhaps lifting a bit further north overnight.
By Friday, highest PoPs will be inland (50-70%) where some
embedded tstms will be possible, to 30-40% along the coast.
Guidance is starting to settle toward a consensus on high
temperatures Friday, from the mid 70s far NW to the low 80s RIC
metro to the mid/upr 80s SE VA/NE NC. Our meandering frontal
boundary lifts back north as a warm front Friday night into
Saturday morning. Highest PoPs will shift north with the front
during this time. By Saturday, expecting temps to warm up again.
Will also have to watch a shortwave progged to cross the region
in the afternoon that could touch of a line of tstms. Highs in
the 80s to low 90s.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
As of 400 PM EDT Wednesday...

Shower/thunderstorm chances continue Saturday night-Sunday morning
for the eastern third of the CWA as a surface trough continues to
linger across the region. A potent shortwave dives southeastward
from Canada to the northeastern US on Monday. The associated surface
low pressure system will drag a cold front southward across the
region late Sunday into Monday bringing another chance for showers
and thunderstorms. The frontal boundary pushes south during the day
on Monday with a few lingering showers/t-storms possible across
mainly southern portions of the CWA. The latest 20/12z ECMWF has
only isolated-scattered showers/t-storms Sunday night-Monday while
the GFS has more widespread t-storms. Thus, opted to maintain no
higher than 50% PoPs Sunday night-Monday. Behind the cold front,
high pressure builds in north of the area bringing drier and cooler
conditions to the region from Tuesday through the middle of next
week.

Sunday will likely be the warmest day of the extended period with
with highs in the lower 90s for most areas. Highs will cool to the
mid-upper 80s on Monday with low-mid 80s expected on Tuesday.
Warming up slightly on Wednesday with highs between 83-87. Expect
morning lows between 70-75 on Sunday and Monday cooling into the 60s
for Tuesday/Wednesday.

&&

.AVIATION /20Z WEDNESDAY THROUGH MONDAY/...
As of 120 PM EDT Wednesday...

Showers/tstms will be possible over central/SE VA into the
evening. VFR conditions will prevail through this evening with
sct-bkn CU of 4-6kft, but with brief MVFR/IFR conditions and
locally strong wind gusts possible in any tstms.

The cold front shifts farther S by Thursday settling near the
VA/NC border, with the best potential for aftn/evening
showers/tstms mainly over central/srn/SE VA and NE NC. High
pressure settles over New England Friday resulting in onshore
flow. Remaining unsettled as an upper level trough approaches
from the SW with a 20-40% chc of showers along the coast, and
40-60% farther inland. The potential for aftn/evening
showers/tstms will continue Saturday and Sunday.

&&

.MARINE...
As of 230 PM EDT Wednesday...

No headlines anticipated in the short term this evening into Friday.
Current observations show generally light and variable winds over
the waters. Seas range from 1 to 2 feet and waves 1 foot. A weak
frontal boundary drops into the region later this evening which will
bring increasing winds and the chance for showers or thunderstorms.
Winds become southeast 10 knots or less this evening and then
southerly overnight. Winds shift to the N/NW on Thursday as the
boundary moves south of the region. The gradient strengthens Friday
into Friday night, bringing onshore winds of 10 to 15 knots and the
potential for 5 foot seas across the northern zones. The flow
becomes more southeasterly Saturday morning and then southerly as a
warm front lifts over the waters. Breezy conditions are expected
Saturday and Small Craft Advisories may be needed for both winds and
seas into Sunday.

&&

.AKQ WATCHES/WARNINGS/ADVISORIES...
MD...None.
NC...None.
VA...None.
MARINE...None.

&&

SYNOPSIS...JDM
NEAR TERM...JDM
SHORT TERM...JDM
LONG TERM...AJB/ERI
AVIATION...AJZ/JDM
MARINE...AJB
Hazardous weather outlook, Jun 20, 4:01 PM EDT, 1 hour 31 minutes before
Hazardous Weather Outlook
National Weather Service Wakefield VA
401 PM EDT Wed Jun 20 2018

NCZ012>017-030>032-102-VAZ048-060>062-064>069-075>090-092-093-
095>100-509>525-212015-
Northampton-Hertford-Gates-Pasquotank-Camden-Western Currituck-
Bertie-Chowan-Perquimans-Eastern Currituck-Fluvanna-Prince Edward-
Cumberland-Goochland-Caroline-Mecklenburg-Lunenburg-Nottoway-Amelia-
Powhatan-Westmoreland-Richmond-Northumberland-Lancaster-Brunswick-
Dinwiddie-Prince George-Charles City-New Kent-Gloucester-Middlesex-
Mathews-Greensville-Sussex-Surry-James City-Southampton-
Isle of Wight-Norfolk/Portsmouth-Suffolk-Chesapeake-Virginia Beach-
Accomack-Western Louisa-Eastern Louisa-Western Hanover-
Eastern Hanover-Western Chesterfield-
Eastern Chesterfield (Including Col. Heights)-
Western Henrico (Including the City of Richmond)-Eastern Henrico-
Western King William-Eastern King William-Western King and Queen-
Eastern King and Queen-Western Essex-Eastern Essex-York-Newport News-
Hampton/Poquoson-
401 PM EDT Wed Jun 20 2018

This Hazardous Weather Outlook is for northeast North Carolina,
central Virginia, east central Virginia, eastern Virginia, north
central Virginia, south central Virginia and southeast Virginia.

.DAY ONE...Through Tonight.

Scattered thunderstorms are expected this afternoon and evening.
Storms will be capable of heavy rain and localized strong wind gusts.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MDZ021>025-212015-
Dorchester-Wicomico-Somerset-Inland Worcester-Maryland Beaches-
401 PM EDT Wed Jun 20 2018

This Hazardous Weather Outlook is for southeast Maryland.

.DAY ONE...Through Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jun 20, 5:00 PM EDT, 32 minutes before
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Special weather statement, Jun 20, 5:13 PM EDT, 19 minutes before
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Special weather statement, Jun 20, 5:15 PM EDT, 17 minutes before
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Special weather statement, Jun 20, 5:25 PM EDT, 7 minutes before
Special Weather Statement
National Weather Service Wakefield VA
525 PM EDT WED JUN 20 2018

NCZ012-VAZ079-087-202215-
Northampton-Brunswick-Greensville-
525 PM EDT WED JUN 20 2018

...A STRONG THUNDERSTORM WILL AFFECT WESTERN NORTHAMPTON...
SOUTHWESTERN GREENSVILLE AND SOUTHERN BRUNSWICK COUNTIES...

At 524 PM EDT, a strong thunderstorm was located over Gasburg, or 13
miles northwest of Roanoke Rapids, moving east at 10 mph.

Wind gusts in excess of 40 mph and pea size hail are possible with
this storm. In addition...Rainfall amounts of up to 1 inch are
possible with this storm.

This storm will be near...
  Barley around 605 PM EDT.

Other locations impacted by this storm include Gum Forks, Henrico,
Vultare, Valentines, Slates Corner, Roanoke Rapids Lake and Lake
Gaston.

Strong wind gusts are possible with this storm. These wind gusts are
capable of knocking down tree limbs...small or weakened trees...and
blowing around trash cans...potted plants...lawn furniture and other
light outdoor objects.

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 more than 10 miles away from a thunderstorm.
Seek a safe shelter inside a building or vehicle.

LAT...LON 3649 7773 3648 7774 3653 7790 3660 7790
      3659 7764 3648 7769
TIME...MOT...LOC 2124Z 273DEG 8KT 3656 7784

wrs
Special weather statement, Jun 20, 5:27 PM EDT, 5 minutes before
Special Weather Statement
National Weather Service Wakefield VA
527 PM EDT WED JUN 20 2018

VAZ064-511-512-517-519-202215-
Eastern Hanover-Western King and Queen-Western Hanover-Western King
William-Caroline-
527 PM EDT WED JUN 20 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN KING AND QUEEN...
SOUTHEASTERN CAROLINE...NORTHWESTERN KING WILLIAM AND CENTRAL HANOVER
COUNTIES...

At 527 PM EDT, a strong thunderstorm was located over Dawn, or near
Ashland, moving southeast at 20 mph.

Wind gusts up to 50 mph are possible with this storm.

Locations impacted include...
Ashland, Randolph Macon College, Mechanicsville, Hanover,
Beulahville, Dawn, Aylett, Kings Dominion, Studley, Mangohick,
Manquin, Enfield, Gum Tree, Etna Mills, Penola, Epworth, Biscoe,
Gilman, Ashcake and Globe.

Strong wind gusts are possible with this storm. These wind gusts are
capable of knocking down tree limbs...small or weakened trees...and
blowing around trash cans...potted plants...lawn furniture and other
light outdoor objects.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike more than 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 3786 7702 3758 7727 3779 7762 3800 7741
TIME...MOT...LOC 2127Z 307DEG 17KT 3783 7739

BUTNER
Special weather statement, Jun 20, 5:31 PM EDT, 1 minute before
Special Weather Statement
National Weather Service Wakefield VA
531 PM EDT WED JUN 20 2018

VAZ097-098-202215-
Virginia Beach-Chesapeake-
531 PM EDT WED JUN 20 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT ...THE CITY OF
CHESAPEAKE AND THE CENTRAL CITY OF VIRGINIA BEACH...

At 530 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Regent University to Great Bridge to
8 miles southwest of Chesapeake. Movement was southeast at 10 mph.

Wind gusts up to 50 mph and pea size hail are possible with these
storms.
In addition...Rainfall amounts of up to 1 inch are possible with
these storms.

Locations impacted include...
Virginia Beach, Regent University, Great Bridge, Chesapeake, Back
Bay, Fentress, Northwest, Princess Anne, South Norfolk, Portlock,
Mount Pleasant, Herberts Corner, Oceana NAS, Pungo, Greenbrier,
Gallups Corner, Hickory, Chesapeake Airport and Macons Corner.

Strong wind gusts are possible with these storms. These wind gusts
are capable of knocking down tree limbs...small or weakened trees...
and blowing around trash cans...potted plants...lawn furniture and
other light outdoor objects.

Torrential rainfall is also occurring with these storms, 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 more than 10 miles away from a thunderstorm.
Seek a safe shelter inside a building or vehicle.

LAT...LON 3655 7613 3655 7619 3660 7646 3671 7633
      3679 7632 3680 7629 3682 7629 3683 7601
      3666 7598
TIME...MOT...LOC 2130Z 295DEG 11KT 3678 7623 3669 7625 3662 7638

BROWN

The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 8:11 PM EDTSpecial Weather StatementAKQAmelia, Chesterfield, Dinwiddie, Lunenburg, Nottoway, Prince George and 6 more49 min
Jun 20, 1:42 PM EDTSpecial Weather StatementAKQPrince George33 min
Jun 20, 1:43 PM EDTSpecial Weather StatementAKQCumberland47 min
Jun 20, 2:11 PM EDTSpecial Weather StatementAKQCumberland49 min
Jun 20, 2:16 PM EDTSpecial Weather StatementAKQPrince George44 min
Jun 20, 2:50 PM EDTSpecial Weather StatementAKQSurry40 min
Jun 20, 3:02 PM EDTSpecial Weather StatementAKQAmelia43 min
Jun 20, 3:12 PM EDTSpecial Weather StatementAKQLunenburg48 min
Jun 20, 3:30 PM EDTSpecial Weather StatementAKQIsle of Wight45 min
Jun 20, 3:35 PM EDTSpecial Weather StatementAKQAmelia, Chesterfield40 min
Jun 20, 3:38 PM EDTSpecial Marine WarningAKQ40 min
Jun 20, 4:03 PM EDTSpecial Weather StatementAKQHenrico42 min
Jun 20, 4:09 PM EDTSpecial Weather StatementAKQDinwiddie, Lunenburg, Nottoway51 min
Jun 20, 4:13 PM EDTSpecial Weather StatementAKQIsle of Wight47 min
Jun 20, 4:33 PM EDTSpecial Weather StatementAKQCharles City, Henrico, King and Queen, New Kent, Prince George, City of Hopewell42 min
Jun 20, 4:44 PM EDTSpecial Weather StatementAKQLunenburg, Nottoway46 min
Jun 20, 4:47 PM EDTSpecial Weather StatementAKQDinwiddie, Sussex, City of Petersburg43 min
Jun 20, 4:56 PM EDTSpecial Weather StatementAKQCaroline49 min
Jun 20, 5:00 PM EDTSpecial Weather StatementAKQCity of Chesapeake, City of Portsmouth45 min
Jun 20, 5:13 PM EDTSpecial Weather StatementAKQCharles City, New Kent47 min
Jun 20, 5:15 PM EDTSpecial Weather StatementAKQKing and Queen45 min
Jun 20, 5:25 PM EDTSpecial Weather StatementAKQGreensville50 min
Jun 20, 5:27 PM EDTSpecial Weather StatementAKQHanover48 min
Jun 20, 5:31 PM EDTSpecial Weather StatementAKQCity of Chesapeake, City of Virginia Beach44 min
Jun 20, 5:33 PM EDTSpecial Weather StatementAKQSouthampton, Sussex42 min
Jun 20, 5:42 PM EDTSpecial Weather StatementAKQBrunswick33 min
Jun 20, 5:46 PM EDTSpecial Weather StatementAKQMecklenburg44 min
Jun 20, 5:59 PM EDTSpecial Weather StatementAKQHenrico, King and Queen, King William, New Kent46 min
Jun 20, 6:05 PM EDTSpecial Weather StatementAKQNorthumberland40 min
Jun 20, 6:11 PM EDTSpecial Weather StatementAKQIsle of Wight, Southampton, City of Franklin49 min
Jun 20, 6:48 PM EDTSpecial Weather StatementAKQCity of Suffolk42 min
Jun 20, 7:04 PM EDTSpecial Weather StatementAKQGreensville26 min
Jun 20, 7:27 PM EDTSpecial Weather StatementAKQMecklenburg48 min
Jun 20, 7:46 PM EDTSevere Thunderstorm WarningAKQMecklenburg32 min
Jun 19, 9:18 PM EDTSpecial Weather StatementAKQPerquimans57 min
Jun 20, 3:25 PM EDTSpecial Weather StatementAKQCamden50 min
Jun 20, 3:39 PM EDTSpecial Weather StatementAKQCurrituck51 min
Jun 20, 6:15 PM EDTSpecial Weather StatementAKQNorthampton45 min
Jun 20, 6:51 PM EDTSpecial Weather StatementAKQCamden24 min
Jun 20, 7:01 PM EDTSpecial Weather StatementAKQChowan44 min
Jun 20, 7:10 PM EDTSpecial Weather StatementAKQHertford35 min
Jun 20, 7:16 PM EDTSpecial Weather StatementAKQBertie44 min
Jun 20, 7:28 PM EDTSpecial Weather StatementAKQCamden, Pasquotank, Perquimans47 min
Jun 20, 7:59 PM EDTSevere Thunderstorm WarningAKQPerquimans46 min

Nearby

Severe Thunderstorm Warnings in Virginia, 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.