Alert archive / Pennsylvania / Special Weather Statements in 2012
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at May 23, 2012, 5:55 PM EDT for Montgomery County, Pennsylvania. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 23, 2012, 5:55 PM EDT (21:55 UTC)
- Expired
- May 23, 2012, 7:00 PM EDT
- In force
- 65 min
- Issued by
- NWS Philadelphia/Mount Holly
County Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 80 km from the middle of the area, began a volume at 21:55 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.9 hours before the alert went out and 97 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
- 43 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 816 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
541
WWUS81 KPHI 232155
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
555 PM EDT WED MAY 23 2012
PAZ068-071-232300-
MONTGOMERY PA-PHILADELPHIA PA-
555 PM EDT WED MAY 23 2012
...SCATTERED THUNDERSTORMS WITH HEAVY RAINFALL...
SCATTERED THUNDERSTORMS WITH HEAVY RAINFALL WILL CONTINUE TO AFFECT
PARTS OF MONTGOMERY COUNTY AND NORTHWESTERN PHILADELPHIA COUNTY
THROUGH THE EARLY EVENING. AT 550 PM...THE HEAVIEST OF THE RAIN WAS
FALLING NEAR WYNDMOOR AND NEAR EAST NORRITON.
RAINFALL OF A HALF INCH TO AN INCH IS POSSIBLE WITH LOCALLY HIGHER
AMOUNTS. THE HEAVY RAIN MAY CAUSE FLOODING ON ROADWAYS AND IN AREAS
OF POOR DRAINAGE.
THE THUNDERSTORMS WILL BE ACCOMPANIED BY DANGEROUS CLOUD TO GROUND
LIGHTNING. IF YOU OBSERVE THREATENING WEATHER...SEEK SHELTER AT ONCE.
LAT...LON 3998 7527 4004 7534 4007 7537 4006 7538
4018 7554 4035 7537 4015 7504
$$
IOVINOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 2:06 PM EDT | Special Weather Statement | PHI | Morris, Sussex | 54 min |
| May 23, 2:58 PM EDT | Special Weather Statement | PHI | Mercer, Somerset | 62 min |
| May 23, 3:58 PM EDT | Special Weather Statement | PHI | Hunterdon, Morris, Sussex, Warren | 2 hr |
| May 22, 8:41 PM EDT | Special Weather Statement | PHI | Carbon, Lehigh | 64 min |
| May 22, 8:45 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh | 55 min |
| May 23, 3:07 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 113 min |
| May 23, 4:52 PM EDT | Special Weather Statement | PHI | Berks, Lehigh, Northampton | 113 min |
| May 23, 6:41 PM EDT | Special Weather Statement | PHI | Berks, Lehigh, Montgomery | 94 min |
| May 23, 2:36 PM EDT | Special Weather Statement | PHI | Kent | 54 min |
| May 23, 3:42 PM EDT | Special Weather Statement | PHI | Caroline, Queen Anne's, Talbot | 63 min |
| May 23, 4:40 PM EDT | Special Weather Statement | PHI | Caroline, Kent, Queen Anne's, Talbot | 110 min |
Nearby
Special Weather Statements in Pennsylvania, 2012Every special weather statement in 2012
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.