Alert archive / Maryland / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 157, NWS Wakefield, VA

July 22, 2017Dorchester County, Wicomico County, Maryland

NWS Wakefield, VA issued this severe thunderstorm warning at Jul 22, 2017, 3:47 PM EDT for Dorchester County, Wicomico County, Maryland. 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
Jul 22, 2017, 3:47 PM EDT (19:47 UTC)
Expired
Jul 22, 2017, 4:30 PM EDT
In force
43 min
Issued by
NWS Wakefield, VA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Dorchester County, MD, Wicomico County, MD

The radar

The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 19:48 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.8 hours before the alert went out and 65 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, Wallops Is Stn, VA at 12:00Z on 2017-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 83 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, Wallops Is Stn, VA at 12:00Z on 2017-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 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
83 J/kg
Mixed-layer CIN
-191 J/kg
Mixed-layer LCL
1397 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
76 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 Jul 22, 1:25 PM EDT, 2 hours 22 minutes earlier.

Area forecast discussion, Jul 22, 1:25 PM EDT, 2 hours 22 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Jul 22, 3:16 AM EDT, 12 hours 31 minutes before
Hazardous Weather Outlook
National Weather Service Wakefield VA
316 AM EDT Sat Jul 22 2017

MDZ021>024-VAZ062-064-075>078-083-085-099-511-512-515>522-230730-
Dorchester-Wicomico-Somerset-Inland Worcester-Goochland-Caroline-
Westmoreland-Richmond-Northumberland-Lancaster-New Kent-Middlesex-
Accomack-Western Hanover-Eastern Hanover-
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-
316 AM EDT Sat Jul 22 2017

...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for southeast Maryland, central
Virginia, east central Virginia, eastern Virginia, north central
Virginia and southeast Virginia.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Heat Advisory.

There is also a slight risk for severe thunderstorms from mid-afternoon
into this evening. The main threats are damaging wind gusts...frequent
lightning and locally heavy rainfall.

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

There is a slight risk for severe thunderstorms Sunday afternoon
into Sunday evening...with the main threats once again damaging
winds...frequent lightning and locally heavy rainfall. Additionally,
heat indices could rise to 100 to 105 degrees midday Sunday through
Sunday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MDZ025-230730-
Maryland Beaches-
316 AM EDT Sat Jul 22 2017

This Hazardous Weather Outlook is for southeast Maryland.

.DAY ONE...Today and Tonight.

Heat index values will climb to around 100 degrees from late morning
through this afternoon.

There is also a slight risk for severe thunderstorms from late
afternoon into this evening. The main threats are damaging wind
gusts...frequent lightning and locally heavy rainfall.

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

There is a slight risk for severe thunderstorms Sunday afternoon
into Sunday evening. The main threat is damaging wind gusts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

VAZ060-061-065>069-079>082-084-086>090-092-093-095>098-100-513-514-
523>525-230730-
Prince Edward-Cumberland-Mecklenburg-Lunenburg-Nottoway-Amelia-
Powhatan-Brunswick-Dinwiddie-Prince George-Charles City-Gloucester-
Mathews-Greensville-Sussex-Surry-James City-Southampton-
Isle of Wight-Norfolk/Portsmouth-Suffolk-Chesapeake-Virginia Beach-
Northampton-Western Chesterfield-
Eastern Chesterfield (Including Col. Heights)-York-Newport News-
Hampton/Poquoson-
316 AM EDT Sat Jul 22 2017

...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central Virginia, east
central Virginia, eastern Virginia, south central Virginia and
southeast Virginia.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Heat Advisory.

There is also a slight risk for severe thunderstorms from mid-afternoon
into this evening. The main threats are damaging wind
gusts...frequent lightning and locally heavy rainfall.

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

Potential for strong to locally severe thunderstorms continues from
Sunday afternoon into Sunday evening. The main threat is damaging
wind gusts. Additionally, heat indices could rise to 100 to 105
degrees midday Sunday through Sunday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ012>017-030>032-230730-
Northampton-Hertford-Gates-Pasquotank-Camden-Western Currituck-
Bertie-Chowan-Perquimans-
316 AM EDT Sat Jul 22 2017

...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for northeast North Carolina.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Heat Advisory.

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

Heat indices of 105 to 108 degrees are possible midday Sunday
through Sunday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ102-230730-
Eastern Currituck-
316 AM EDT Sat Jul 22 2017

This Hazardous Weather Outlook is for northeast North Carolina.

.DAY ONE...Today and Tonight.

Heat index values around 100 degrees are possible from late morning
through mid-afternoon today.

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

Heat indices of around 100 are possible once again on Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

VAZ048-509-510-230730-
Fluvanna-Western Louisa-Eastern Louisa-
316 AM EDT Sat Jul 22 2017

This Hazardous Weather Outlook is for central Virginia.

.DAY ONE...Today and Tonight.

Heat index values will climb to around 100 degrees from late morning
through mid-afternoon. There is also a slight risk for severe
thunderstorms from mid-afternoon into this evening. The main threats
are damaging wind gusts...frequent lightning and locally heavy
rainfall.

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

Potential for strong to locally severe thunderstorms continues from
Sunday afternoon into Sunday evening. The main threat is damaging
wind gusts. Additionally, heat indices could again rise to 100 to
104 degrees midday Sunday through Sunday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jul 22, 3:24 PM EDT, 23 minutes before
Special Weather Statement
National Weather Service Wakefield VA
324 PM EDT SAT JUL 22 2017

MDZ024-025-222015-
Maryland Beaches-Inland Worcester-
324 PM EDT SAT JUL 22 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN WORCESTER COUNTY...

At 324 PM EDT, a strong thunderstorm was located over Selbyville...or
9 miles northwest of Ocean City, moving southeast at 20 mph.

Wind gusts in excess of 40 mph are possible with this storm.

This storm will be near...
  Ocean Pines around 335 PM EDT.
  Berlin around 340 PM EDT.
  Cape Isle Of Wight around 350 PM EDT.
  Ocean City around 355 PM EDT.

Other locations impacted by this storm include Bishop...West Ocean
City...Showell...Ocean City Municipality and Bishopville.

If you see lightning or hear thunder...you are at risk. Take shelter
indoors immediately. If you cannot find shelter in a building a
vehicle provides safety from lightning.

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.

LAT...LON 3830 7505 3829 7507 3826 7508 3844 7534
      3845 7534 3845 7505
TIME...MOT...LOC 1924Z 304DEG 16KT 3845 7520

ZIMMERMAN
Special weather statement, Jul 22, 3:33 PM EDT, 14 minutes before
Special Weather Statement
National Weather Service Wakefield VA
333 PM EDT SAT JUL 22 2017

MDZ021-222015-
Dorchester-
333 PM EDT SAT JUL 22 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT DORCHESTER COUNTY...

At 332 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Grasonville to Copperville to near
St. Michaels to 7 miles northeast of Flag Harbor. Movement was east
at 35 mph.

Wind gusts of 40 to 50 mph and frequent cloud to ground lightning
are possible with these storms.

These storms will be near...
  University Of Maryland Center For Environmental Studies around 355
  PM EDT.
  Cambridge and Secretary around 400 PM EDT.
  Hurlock around 410 PM EDT.
  Vienna around 415 PM EDT.

Other locations impacted by these storms include Madison...
Brookview...Eldorado...Woolford...Hudson...East New Market...Church
Creek...Bucktown...Linkwood and Lloyds.

If you see lightning or hear thunder...you are at risk. Take shelter
indoors immediately. If you cannot find shelter in a building a
vehicle provides safety from lightning.

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.

LAT...LON 3868 7580 3869 7576 3864 7571 3860 7570
      3835 7597 3849 7631 3853 7620 3856 7621
      3854 7628 3857 7631 3860 7626 3863 7629
      3860 7621 3863 7617 3859 7616 3857 7603
      3868 7594 3870 7585
TIME...MOT...LOC 1932Z 286DEG 31KT 3892 7615 3881 7617 3875 7621 3855
7640

ZIMMERMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 3:27 PM EDTSpecial Marine WarningAKQ63 min
Jul 22, 4:05 PM EDTHeat AdvisoryAKQAccomack, Amelia, Brunswick, Charles City, Chesterfield, Dinwiddie and 32 more28 hr
Jul 22, 4:21 PM EDTSpecial Weather StatementAKQSouthampton, City of Franklin39 min
Jul 22, 4:48 PM EDTSpecial Weather StatementAKQCity of Chesapeake, City of Suffolk42 min
Jul 22, 4:50 PM EDTSpecial Marine WarningAKQ85 min
Jul 22, 5:19 PM EDTSpecial Weather StatementAKQYork, City of Newport News41 min
Jul 22, 5:58 PM EDTSpecial Weather StatementAKQCity of Hampton, City of Newport News, City of Poquoson32 min
Jul 22, 6:07 PM EDTSpecial Weather StatementAKQLouisa38 min
Jul 22, 6:10 PM EDTSpecial Marine WarningAKQ50 min
Jul 22, 6:12 PM EDTSpecial Marine WarningAKQ63 min
Jul 22, 6:29 PM EDTSpecial Weather StatementAKQKing George46 min
Jul 22, 6:30 PM EDTSpecial Weather StatementAKQNorthampton45 min
Jul 22, 6:34 PM EDTSevere Thunderstorm WarningAKQCaroline, Essex, Westmoreland41 min
Jul 22, 6:39 PM EDTSpecial Marine WarningAKQ66 min
Jul 22, 6:40 PM EDTSpecial Weather StatementAKQMathews50 min
Jul 22, 6:42 PM EDTSpecial Marine WarningAKQ33 min
Jul 22, 6:51 PM EDTSpecial Weather StatementAKQNorthampton39 min
Jul 22, 7:04 PM EDTSevere Thunderstorm WarningAKQCaroline, Essex, King and Queen, Richmond, Westmoreland41 min
Jul 22, 7:16 PM EDTSpecial Marine WarningAKQ59 min
Jul 22, 7:17 PM EDTSpecial Weather StatementAKQNorthampton28 min
Jul 22, 7:45 PM EDTSevere Thunderstorm WarningAKQEssex, Lancaster, Northumberland, Richmond, Westmoreland60 min
Jul 22, 5:34 PM EDTSpecial Weather StatementAKQGates41 min
Jul 22, 5:39 PM EDTSpecial Weather StatementAKQHertford36 min
Jul 22, 6:46 PM EDTSpecial Weather StatementAKQPasquotank44 min
Jul 22, 3:24 PM EDTSpecial Weather StatementAKQWorcester51 min
Jul 22, 3:33 PM EDTSpecial Weather StatementAKQDorchester42 min
Jul 22, 4:04 PM EDTSpecial Weather StatementAKQDorchester, Wicomico41 min
Jul 22, 4:30 PM EDTSevere Thunderstorm WarningAKQDorchester, Wicomico, Worcester45 min
Jul 22, 5:17 PM EDTSpecial Weather StatementAKQWorcester28 min
Jul 22, 6:48 PM EDTSpecial Weather StatementAKQDorchester42 min
Jul 22, 7:46 PM EDTSpecial Weather StatementAKQSomerset, Wicomico44 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2017Every severe thunderstorm warning in 2017

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.