Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 178, NWS Philadelphia/Mount Holly

June 29, 2019Caroline County, Queen Anne's County, Maryland; Kent County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 29, 2019, 4:55 PM EDT for Caroline County, Queen Anne's County, Maryland; Kent County, Delaware. It was in force for 50 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
Jun 29, 2019, 4:55 PM EDT (20:55 UTC)
Expired
Jun 29, 2019, 5:45 PM EDT
In force
50 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Kent County, DE, Caroline County, MD, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 20:57 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 29, 2:04 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 126 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, Washington/Dulle, VA at 12:00Z on 2019-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 927 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2019-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
927 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
1390 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

122 
WUUS51 KPHI 292055
SVRPHI
DEC001-MDC011-035-292145-
/O.NEW.KPHI.SV.W.0178.190629T2055Z-190629T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
455 PM EDT Sat Jun 29 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  West central Kent County in central Delaware...
  Northeastern Queen Anne's County in northeastern Maryland...
  Northeastern Caroline County in eastern Maryland...

* Until 545 PM EDT.

* At 455 PM EDT, a severe thunderstorm was located over Church Hill,
  or 9 miles northeast of Centerville, moving southeast at 25 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Chestertown, Greensboro, Church Hill, Millington, Sudlersville,
  Goldsboro, Starkey Corner, Crumpton, Henderson, Marydel,
  Templeville, Barclay and Kingstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

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

&&

LAT...LON 3914 7607 3915 7609 3917 7604 3918 7607
      3921 7606 3924 7601 3924 7594 3926 7587
      3924 7580 3925 7573 3892 7573 3912 7611
TIME...MOT...LOC 2055Z 293DEG 21KT 3916 7598 

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

Staarmann
1 follow-up statement
478 
WWUS51 KPHI 292113
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
513 PM EDT Sat Jun 29 2019

DEC001-MDC011-035-292145-
/O.CON.KPHI.SV.W.0178.000000T0000Z-190629T2145Z/
Kent DE-Queen Anne's MD-Caroline MD-
513 PM EDT Sat Jun 29 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR WEST CENTRAL KENT...NORTHEASTERN QUEEN ANNE'S AND NORTHEASTERN
CAROLINE COUNTIES...

At 513 PM EDT, a severe thunderstorm was located near Hope, or 8
miles east of Centerville, moving southeast at 25 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Greensboro, Goldsboro, Henderson, Marydel, Templeville and Barclay. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 3906 7600 3917 7591 3920 7573 3892 7573
TIME...MOT...LOC 2113Z 304DEG 21KT 3906 7590 

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

Staarmann

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 29, 1:19 PM EDTSpecial Weather StatementPHICecil26 min
Jun 29, 1:26 PM EDTSevere Thunderstorm WarningPHICecil, Kent49 min
Jun 29, 2:08 PM EDTAreal Flood AdvisoryPHICecil3 hr
Jun 29, 2:12 PM EDTSpecial Weather StatementPHICecil33 min
Jun 29, 2:44 PM EDTSpecial Weather StatementPHICecil31 min
Jun 29, 2:47 PM EDTSevere Thunderstorm WarningPHICecil28 min
Jun 29, 3:27 PM EDTSevere Thunderstorm WarningPHICecil53 min
Jun 29, 3:39 PM EDTSpecial Weather StatementPHICecil51 min
Jun 29, 3:59 PM EDTSevere Thunderstorm WarningPHICecil, Kent46 min
Jun 29, 4:14 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's46 min
Jun 29, 4:38 PM EDTSevere Thunderstorm WarningPHICecil, Kent52 min
Jun 29, 4:58 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's, Talbot47 min
Jun 29, 5:26 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot79 min
Jun 29, 5:38 PM EDTAreal Flood AdvisoryPHICaroline, Queen Anne's109 min
Jun 29, 2:33 PM EDTSpecial Weather StatementPHIKent27 min
Jun 29, 2:57 PM EDTSpecial Weather StatementPHIKent33 min
Jun 29, 3:06 PM EDTSevere Thunderstorm WarningPHIKent39 min
Jun 29, 3:13 PM EDTSevere Thunderstorm WarningPHINew Castle8 min
Jun 29, 3:24 PM EDTSevere Thunderstorm WarningPHINew Castle36 min
Jun 29, 4:00 PM EDTFlash Flood WarningPHINew Castle3 hr
Jun 29, 4:24 PM EDTSevere Thunderstorm WarningPHIKent36 min
Jun 29, 4:52 PM EDTSevere Thunderstorm WarningPHIKent, Sussex38 min
Jun 29, 6:38 PM EDTSpecial Weather StatementPHISussex52 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2019Severe Thunderstorm Warnings in Delaware, 2019Every severe thunderstorm warning in 2019

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.