Alert archive / New Jersey / Mesoscale Discussions in 2021
Mesoscale Discussion 752
The Storm Prediction Center issued this mesoscale discussion at May 26, 2021, 4:41 PM EDT for 8 states. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- May 26, 2021, 4:41 PM EDT (20:41 UTC)
- Expired
- May 26, 2021, 5:45 PM EDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 205...206
All 86 counties
Kent County, DE, New Castle County, DE, Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Dorchester County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Queen Anne's County, MD, Talbot County, MD, Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Essex County, NJ, Gloucester County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Passaic County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Albany County, NY, Bronx County, NY, Columbia County, NY, Dutchess County, NY, Greene County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Schenectady County, NY, Sullivan County, NY, Ulster County, NY, Westchester County, NY, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lackawanna County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA, Pike County, PA, Schuylkill County, PA, Wayne County, PA, York County, PA, Arlington County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Manassas, VA, City of Manassas Park, VA, Fairfax County, VA, Prince William County, VA, Bennington County, VT, Windham County, VT
The radar
The Philadelphia radar (KDIX), 113 km from the middle of the area, began a volume at 20:44 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
Brookhaven, NY (KOKX), launched 12:00Z, 8.7 hours before the alert went out and 162 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.
- Mixed-layer CAPE
- 5 J/kg
- Mixed-layer CIN
- -233 J/kg
- Mixed-layer LCL
- 554 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
548
ACUS11 KWNS 262042
SWOMCD
SPC MCD 262041
NYZ000-NHZ000-MAZ000-VTZ000-CTZ000-NJZ000-PAZ000-DEZ000-MDZ000-DCZ000-VAZ000-262145-
Mesoscale Discussion 0752
NWS Storm Prediction Center Norman OK
0341 PM CDT Wed May 26 2021
Areas affected...portions of northern VA...MD...DE...NJ...eastern
PA...southern NY...southern VT...and western MA/CT
Concerning...Severe Thunderstorm Watch 205...206...
Valid 262041Z - 262145Z
The severe weather threat for Severe Thunderstorm Watch 205, 206
continues.
SUMMARY...Strong to severe thunderstorms will continue to produce
sporadic wind damage the next several hours as they moved eastward
across parts of the Mid-Atlantic and southern New England.
DISCUSSION...Clusters of strong to severe thunderstorms continue to
quickly progress eastward late this afternoon. Mainly weak
instability prevails across the region, with some pockets of MLCAPE
as high as 1500 J/kg closer to the Delmarva vicinity. While this
weaker instability and limited deep layer shear is subduing a larger
severe threat, very steep low level lapse rates are aiding in
periodic strong downdrafts. Sporadic damaging gusts have been
reported through the afternoon and this trend should continue with
the more intense clusters over the next few hours across eastern
portions of Severe Thunderstorm Watch 205 and into Severe
Thunderstorm Watch 206.
..Leitman.. 05/26/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GYX...BOX...BTV...OKX...ALY...PHI...BGM...AKQ...
CTP...LWX...
LAT...LON 43097381 43277284 42997237 42447235 41547292 40657359
38887518 38407567 38347691 38487739 38897765 39747719
41557571 42517446 43097381SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | Northwest Hills Planning Region | 7 hr |
| May 26, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | Greater Bridgeport Planning Region | 7 hr |
| May 26, 3:21 PM EDT | Mesoscale Discussion | SPC | 54 min | |
| May 26, 3:56 PM EDT | Severe Thunderstorm Watch | SPC | Capitol Planning Region, Northeastern Connecticut Planning Region | 5 hr |
| May 26, 6:07 PM EDT | Mesoscale Discussion | SPC | 113 min | |
| May 26, 1:21 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 84 min |
| May 26, 6:34 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 116 min |
| May 26, 12:16 PM EDT | Mesoscale Discussion | SPC | Albany, Allegany, Broome, Cattaraugus, Cayuga, Chautauqua and 32 more | 119 min |
| May 26, 2:07 PM EDT | Mesoscale Discussion | SPC | Albany, Chenango, Cortland, Fulton, Greene, Madison and 6 more | 83 min |
Nearby
Mesoscale Discussions in New Jersey, 2021Mesoscale Discussions in New York, 2021Mesoscale Discussions in Pennsylvania, 2021Every mesoscale discussion in 2021
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.