Alert archive / New Jersey / Tornado Watches in 2019
Tornado Watch 74
The Storm Prediction Center issued this tornado watch at Apr 15, 2019, 1:05 AM EDT for 5 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 15, 2019, 1:05 AM EDT (05:05 UTC)
- Expired
- Apr 15, 2019, 5:45 AM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 53 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Cape May 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, Ocean County, NJ, Passaic County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, 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, Richmond County, NY, Rockland County, NY, Ulster County, NY, Westchester County, NY, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 28 km from the middle of the area, began a volume at 05:05 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 30%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 1:28 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 47 min |
| Apr 15, 2:15 AM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 45 min |
| Apr 15, 2:25 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 50 min |
| Apr 15, 2:39 AM EDT | Severe Thunderstorm Warning | ALY | Albany, Columbia, Greene, Rensselaer | 28 min |
| Apr 15, 2:43 AM EDT | Tornado Warning | PHI | Caroline, Kent, Queen Anne's | 32 min |
| Apr 15, 2:46 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 44 min |
| Apr 15, 3:03 AM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 20 min |
| Apr 15, 3:07 AM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 38 min |
| Apr 15, 3:19 AM EDT | Tornado Warning | PHI | New Castle | 26 min |
| Apr 15, 3:21 AM EDT | Tornado Warning | PHI | Kent | 24 min |
| Apr 15, 3:26 AM EDT | Tornado Warning | ALY | Greene | 13 min |
| Apr 15, 3:27 AM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Morris, Somerset | 32 min |
| Apr 15, 3:28 AM EDT | Severe Thunderstorm Warning | PHI | Sussex | 47 min |
| Apr 15, 3:31 AM EDT | Tornado Warning | PHI | Sussex | 29 min |
| Apr 15, 3:36 AM EDT | Tornado Warning | PHI | Kent, Sussex | 24 min |
| Apr 15, 3:36 AM EDT | Severe Thunderstorm Warning | OKX | Orange | 39 min |
| Apr 15, 3:39 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more | 37 min |
| Apr 15, 3:41 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 64 min |
| Apr 15, 3:57 AM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 13 min |
| Apr 15, 4:08 AM EDT | Severe Thunderstorm Warning | OKX | Bergen, Essex, Hudson, Passaic, Union | 37 min |
| Apr 15, 4:22 AM EDT | Severe Thunderstorm Warning | ALY | Dutchess, Ulster | 38 min |
| Apr 15, 4:37 AM EDT | Severe Thunderstorm Warning | OKX | Bronx, Kings, Nassau, New York, Queens, Richmond and 2 more | 23 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 5.1 hours before the alert went out and 160 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
- 7 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 437 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 236 m²/s²
- 0-3 km storm-relative helicity
- 268 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 11:56 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 2 hr |
| Apr 15, 3:50 AM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 55 min |
| Apr 15, 12:41 AM EDT | Tornado Watch | SPC | Dorchester, Somerset, Wicomico, Worcester | 5 hr |
| Apr 15, 2:30 AM EDT | Mesoscale Discussion | SPC | Saint Mary's, Somerset | 60 min |
| Apr 14, 9:14 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chemung, Schuyler, Steuben, Wyoming | 61 min |
| Apr 14, 9:56 PM EDT | Tornado Watch | SPC | Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 10 more | 5 hr |
| Apr 15, 12:33 AM EDT | Mesoscale Discussion | SPC | Essex, Fulton, Hamilton, Herkimer, Jefferson, Lewis and 8 more | 117 min |
| Apr 15, 12:44 AM EDT | Mesoscale Discussion | SPC | Montour, Northumberland, Snyder, Union | 61 min |
Nearby
Tornado Watches in New Jersey, 2019Tornado Watches in New York, 2019Tornado Watches in Pennsylvania, 2019Every tornado watch 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.