Alert archive / New Jersey / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 190, NWS Philadelphia/Mount Holly

July 21, 2006Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2006, 3:57 PM EDT for Middlesex County, New Jersey. It was in force for 33 min. 2 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: Jul 21, 2006, 3:57 PM EDT (19:57 UTC)
Expired: Jul 21, 2006, 4:30 PM EDT
In force: 33 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 57 km from the middle of the area, began a volume at 19:59 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 21, 4:10 PM EDT	HAIL 0.5	Old Bridge, NJ	DIME SIZE HAIL REPORTED IN OLD BRIDGE.
Jul 21, 4:10 PM EDT	HAIL 0.5	Perth Amboy, NJ	DIME SIZE HAIL REPORTED IN PERTH AMBOY.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.0 hours before the alert went out and 132 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: 173 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KPHI 211957
SVRPHI
NJC023-212030-
/O.NEW.KPHI.SV.W.0190.060721T1957Z-060721T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
357 PM EDT FRI JUL 21 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY
  THIS INCLUDES THE CITY OF PERTH AMBOY

* UNTIL 430 PM EDT

* AT 354 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  SAYREVILLE...OR ABOUT 6 MILES SOUTHWEST OF PERTH AMBOY...AND MOVING
  NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PERTH AMBOY BY 405 PM EDT...
  CARTERET BY 415 PM EDT...

LAT...LON 4045 7447 4035 7439 4046 7412 4059 7424

$$

AMC

1 follow-up statement

000 
WWUS51 KPHI 212025
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
423 PM EDT FRI JUL 21 2006

NJC023-212033-
/O.EXP.KPHI.SV.W.0190.000000T0000Z-060721T2030Z/
MIDDLESEX NJ-
423 PM EDT FRI JUL 21 2006

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MIDDLESEX COUNTY
EXPIRES AT 430 PM EDT...

THE THUNDERSTORMS THAT PROMPTED THE WARNING HAVE NOW MOVED NORTHEAST 
OF MIDDLESEX COUNTY. HOWEVER, MORE SHOWERS AND THUNDERSTORM ARE 
LIKELY FOR THE REMAINDER OF THIS AFTERNOON. STAY ALERT FOR ANY 
ADDITIONAL WARNINGS THAT MAY BE NEEDED.

LAT...LON 4045 7447 4035 7439 4046 7412 4059 7424

$$

AMC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 2:54 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	36 min
Jul 21, 2:56 PM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	37 hr
Jul 21, 3:41 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	26 min
Jul 21, 5:08 PM EDT	Special Marine Warning	PHI		52 min
Jul 21, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	33 min
Jul 21, 5:33 PM EDT	Flash Flood Warning	PHI	Somerset	3 hr
Jul 21, 6:56 PM EDT	Flash Flood Warning	PHI	Middlesex, Somerset	3 hr
Jul 21, 7:07 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	29 min
Jul 21, 7:31 PM EDT	Flash Flood Warning	PHI	Hunterdon	3 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2006 Every severe thunderstorm warning in 2006

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.