Alert archive / Maryland / Frost Advisories in 2016

Frost Advisory 13, NWS Philadelphia/Mount Holly

November 6, 2016Delaware County, Pennsylvania; Cecil County, Kent County, Maryland; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this frost advisory at Nov 6, 2016, 5:46 PM EST for Delaware County, Pennsylvania; Cecil County, Kent County, Maryland; New Castle County, Delaware. It took effect at Nov 7, 2016, 2:00 AM EST. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Nov 6, 2016, 5:46 PM EST (22:46 UTC)
In effect from: Nov 7, 2016, 2:00 AM EST
Expired: Nov 7, 2016, 6:30 AM EST
In force: 5 hr
Issued by: NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD, Kent County, MD, Delaware County, PA

The radar

The Dover AFB radar (KDOX), 88 km from the middle of the area, began a volume at 22:49 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.8 hours before the alert went out and 156 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1497 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

311 
WWUS71 KPHI 062246
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
546 PM EST SUN NOV 6 2016

DEZ001-MDZ008-012-PAZ070-071200-
/O.NEW.KPHI.FR.Y.0013.161107T0700Z-161107T1300Z/
NEW CASTLE-CECIL-KENT MD-DELAWARE-
INCLUDING THE CITIES OF...WILMINGTON...ELKTON...CHESTERTOWN...
MEDIA
546 PM EST SUN NOV 6 2016

...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EST MONDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 8 AM EST MONDAY.

* LOCATIONS...THE TYPICAL COLDER SPOTS OUTSIDE OF THE CITIES AND
  AWAY FROM THE BAYS IN NORTHEASTERN MARYLAND, NORTHERN DELAWARE
  AND FAR SOUTHEASTERN PENNSYLVANIA.

* TEMPERATURES...MIDDLE 30S.

* IMPACTS...SENSITIVE PLANTS AND CROPS MAY BE DAMAGED OR KILLED BY
  THE FROST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT WIDESPREAD FROST IS EXPECTED.
SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$
JRK

1 follow-up statement

551 
WWUS71 KPHI 071130
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
630 AM EST MON NOV 7 2016

DEZ001-MDZ008-012-PAZ070-071230-
/O.CAN.KPHI.FR.Y.0013.000000T0000Z-161107T1300Z/
NEW CASTLE-CECIL-KENT MD-DELAWARE-
INCLUDING THE CITIES OF...WILMINGTON...ELKTON...CHESTERTOWN...
MEDIA
630 AM EST MON NOV 7 2016

...FROST ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE
FROST ADVISORY.


$$

Nearby

Frost Advisories in Maryland, 2016 Frost Advisories in Pennsylvania, 2016 Frost Advisories in Delaware, 2016 Every frost advisory in 2016

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.