Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 18, NWS Philadelphia/Mount Holly

April 26, 20195 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 26, 2019, 3:32 PM EDT for 5 counties in Maryland. It was in force for 58 min. 11 reports 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: Apr 26, 2019, 3:32 PM EDT (19:32 UTC)
Expired: Apr 26, 2019, 4:30 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 68 km from the middle of the area, began a volume at 19:33 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
Apr 26, 4:15 PM EDT	MARINE TSTM WIND 39	11 Ese Shady Side, MD	LOWES WHARF
Apr 26, 4:26 PM EDT	TSTM WND DMG	3 Nw Hambleton, MD	TREE DOWN ON WIRES ON OLD COUNTRY CLUB ROAD. TIME ESTIMATED FROM RADAR.
Apr 26, 4:28 PM EDT	TSTM WND DMG	Carville, MD	DOWNED TREES AND BLOWN DEBRIS FORCED LANE RESTRICTIONS ON U.S. HIGHWAY 301 AT STATE HIGHWAY 305. TIME ESTIMATED FROM RADAR.
Apr 26, 4:28 PM EDT	TSTM WND DMG	Carville, MD	DOWNED TREES AND BLOWN DEBRIS FORCED LANE RESTRICTIONS ON U.S. HIGHWAY 301 AT STATE HIGHWAY 305. TIME ESTIMATED FROM RADAR.
Apr 26, 4:30 PM EDT	TSTM WND DMG	3 Sw Earleville, MD	SEVERAL PINE TREES UPROOTED. DELAYED REPORT FROM FRIDAY...TIME ESTIMATED FROM RADAR.
Apr 26, 4:32 PM EDT	TSTM WND DMG	1 N Crumpton, MD	TREE DAMAGE AT A HOME NEAR ROUTE 290 AND 291. IRRIGATION SYSTEM ACROSS THE STREET COLLAPSED.
Apr 26, 4:32 PM EDT	TSTM WND DMG	3 Wnw Sudlersville, MD	DOWNED TREES AND BLOWN DEBRIS CLOSED U.S. HIGHWAY 301 NEAR DUDLEY CONNERS ROAD. TIME ESTIMATED FROM RADAR.
Apr 26, 4:32 PM EDT	TSTM WND DMG	3 Wnw Sudlersville, MD	DOWNED TREES AND BLOWN DEBRIS CLOSED U.S. HIGHWAY 301 NEAR DUDLEY CONNERS ROAD. TIME ESTIMATED FROM RADAR.
Apr 26, 4:35 PM EDT	TSTM WND GST 50	2 N Galena, MD	MEASURED IN FREDERICKTOWN.
Apr 26, 4:36 PM EDT	TSTM WND DMG	Sudlersville, MD	EMERGENCY SERVICES REPORTS TREES DOWN AROUND THE AREA. TIME ESTIMATED FROM RADAR.
Apr 26, 4:36 PM EDT	TSTM WND DMG	Sudlersville, MD	EMERGENCY SERVICES REPORTS TREES DOWN AROUND THE AREA. TIME ESTIMATED FROM RADAR.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 26, 1:33 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.5 hours before the alert went out and 104 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: 49 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 293 m²/s²
0-3 km storm-relative helicity: 355 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

861 
WUUS51 KPHI 261932
SVRPHI
MDC011-015-029-035-041-262030-
/O.NEW.KPHI.SV.W.0018.190426T1932Z-190426T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
332 PM EDT FRI APR 26 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Talbot County in eastern Maryland...
  Queen Anne's County in northeastern Maryland...
  Western Caroline County in eastern Maryland...
  Kent County in northeastern Maryland...
  Cecil County in northeastern Maryland...

* Until 430 PM EDT.

* At 332 PM EDT, severe thunderstorms were located along a line
  extending from near Jarrettsville to Fort Smallwood State Park to
  Prince Frederick, moving northeast at 40 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Easton, Elkton, Centerville, Calvert, Talbot, Chestertown,
  Centreville, North East, Rising Sun, Oakland, Ridgely, Rock Hall,
  Charlestown, Trappe, St. Michaels, Church Hill, Preston, Cecilton,
  Oxford and Millington.

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.

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

&&

A tornado watch remains in effect until 900 PM EDT for eastern and
northeastern Maryland.

LAT...LON 3875 7635 3886 7626 3879 7620 3879 7619
      3894 7621 3889 7629 3896 7631 3884 7637
      3885 7638 3917 7628 3952 7598 3971 7623
      3972 7581 3870 7586 3860 7606
TIME...MOT...LOC 1932Z 239DEG 35KT 3965 7653 3915 7650 3855 7658 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

MPS

1 follow-up statement

709 
WWUS51 KPHI 262017
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
417 PM EDT FRI APR 26 2019

MDC011-015-029-035-041-262030-
/O.CON.KPHI.SV.W.0018.000000T0000Z-190426T2030Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-Cecil MD-
417 PM EDT FRI APR 26 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR TALBOT...QUEEN ANNE'S...WESTERN CAROLINE...KENT AND CECIL
COUNTIES...

At 417 PM EDT, severe thunderstorms were located along a line
extending from near Quarryville to Betterton to near Talbot, moving
northeast at 40 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Easton, Elkton, Centerville, Calvert, Talbot, Chestertown,
Centreville, North East, Rising Sun, Oakland, Ridgely, Rock Hall,
Charlestown, Trappe, St. Michaels, Church Hill, Preston, Cecilton,
Oxford and Millington.

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.

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

&&

A tornado watch remains in effect until 900 PM EDT for eastern and
northeastern Maryland.

LAT...LON 3875 7635 3886 7626 3879 7620 3879 7619
      3894 7621 3889 7629 3896 7631 3884 7637
      3885 7638 3917 7628 3952 7598 3971 7623
      3972 7581 3870 7586 3860 7606
TIME...MOT...LOC 2017Z 232DEG 34KT 3987 7608 3936 7611 3878 7628 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 10:23 AM EDT	Special Weather Statement	PHI	Caroline	37 min
Apr 26, 10:51 AM EDT	Special Weather Statement	PHI	Caroline	24 min
Apr 26, 4:01 PM EDT	Tornado Warning	PHI	Cecil, Kent, Queen Anne's	29 min
Apr 26, 4:24 PM EDT	Tornado Warning	PHI	Cecil, Kent	36 min
Apr 26, 4:28 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	47 min
Apr 26, 4:59 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	4 hr
Apr 26, 5:07 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	38 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.