Alert archive / Maryland / Areal Flood Advisories in 2015
Areal Flood Advisory 18, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at May 18, 2015, 9:01 PM EDT for Cecil County, Maryland. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 18, 2015, 9:01 PM EDT (01:01 UTC)
- Expired
- May 19, 2015, 12:00 AM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Cecil County, MD
The radar
The Dover AFB radar (KDOX), 93 km from the middle of the area, began a volume at 01:02 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 00:00Z, 1.0 hours before the alert went out and 142 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
- 306 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 1649 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at May 18, 4:02 PM EDT, 4 hours 59 minutes earlier.
Area forecast discussion, May 18, 4:02 PM EDT, 4 hours 59 minutes before
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</html>Hazardous weather outlook, May 18, 4:04 PM EDT, 4 hours 57 minutes before
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Special weather statement, May 18, 3:28 PM EDT, 5 hours 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 328 PM EDT MON MAY 18 2015 DEZ002-003-MDZ015-020-182030- KENT-INLAND SUSSEX-CAROLINE-QUEEN ANNE'S- 328 PM EDT MON MAY 18 2015 ...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN SUSSEX... SOUTHWESTERN KENT...NORTHEASTERN QUEEN ANNE'S AND NORTHEASTERN CAROLINE COUNTIES... AT 327 PM EDT...A STRONG THUNDERSTORM WAS OVER GOLDSBORO...OR 14 MILES EAST OF CENTERVILLE...MOVING EAST AT 10 MPH. WINDS IN EXCESS OF 40 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... HARRINGTON...CAMDEN...GREENSBORO...GOLDSBORO...WOODSIDE...VIOLA... ANDREWSVILLE...SANDTOWN...RISING SUN-LEBANON...RISING SUN... HAZLETTVILLE...DOVER BASE HOUSING...WYOMING...FELTON...HENDERSON... MARYDEL...TEMPLEVILLE...BARCLAY...RIVERVIEW AND WOODSIDE EAST. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. LAT...LON 3909 7601 3919 7593 3911 7546 3883 7565 TIME...MOT...LOC 1927Z 281DEG 10KT 3904 7578
Special weather statement, May 18, 4:00 PM EDT, 5 hours 1 minute before
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</html>Special weather statement, May 18, 5:02 PM EDT, 3 hours 59 minutes before
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</html>Special weather statement, May 18, 8:57 PM EDT, 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 857 PM EDT MON MAY 18 2015 PAZ054-055-190400- CARBON-MONROE- INCLUDING THE CITIES OF...JIM THORPE...STROUDSBURG 857 PM EDT MON MAY 18 2015 ...FOG ACROSS THE HIGHER ELEVATIONS THIS EVENING... PATCHY FOG WITH VISIBILITIES OF ONE HALF OF A MILE OR LESS AT TIMES WILL OCCUR ACROSS THE HIGHER ELEVATIONS OF THE POCONOS THIS EVENING. VISIBILITIES MAY IMPROVE OVERNIGHT AS SHOWERS CONTINUE TO MOVE THROUGH THE AREA. ROBERTSON
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 5:25 PM EDT | Special Weather Statement | PHI | Salem | 50 min |
| May 19, 12:49 AM EDT | Special Weather Statement | PHI | Talbot | 26 min |
Nearby
Areal Flood Advisories in Maryland, 2015Every areal flood advisory in 2015
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.