Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 211, NWS Philadelphia/Mount Holly

July 6, 2019Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2019, 6:06 PM EDT for Caroline County, Maryland. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 6, 2019, 6:06 PM EDT (22:06 UTC)
Expired: Jul 6, 2019, 6:45 PM EDT
In force: 39 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Caroline County, MD

The radar

The Dover AFB radar (KDOX), 34 km from the middle of the area, began a volume at 22:05 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.

What was reported inside it

Time	Report	Where	Remark
Jul 6, 6:25 PM EDT	TSTM WND DMG	1 Ene Preston, MD	TREE AND DEBRIS IN ROADWAY FROM THUNDERSTORM. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.1 hours before the alert went out and 94 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 858 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 755 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

718 
WUUS51 KPHI 062206
SVRPHI
MDC011-062245-
/O.NEW.KPHI.SV.W.0211.190706T2206Z-190706T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
606 PM EDT Sat Jul 6 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Caroline County in eastern Maryland...

* Until 645 PM EDT.

* At 606 PM EDT, a severe thunderstorm was located near Preston, or
  near Hurlock, moving east at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Federalsburg, Preston, Agner, Harmony and Smithville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter such as an interior room, a
bathroom, closet or basement.

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

&&

LAT...LON 3869 7577 3868 7580 3870 7580 3871 7584
      3870 7590 3876 7592 3888 7573 3864 7570
TIME...MOT...LOC 2206Z 253DEG 11KT 3869 7584 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 5:27 PM EDT	Tornado Warning	PHI	Queen Anne's, Talbot	33 min
Jul 6, 5:49 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent	4 hr
Jul 6, 7:45 PM EDT	Special Weather Statement	PHI	Cecil	45 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2019 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.