Alert archive / Maryland / Areal Flood Warnings in 2016

Areal Flood Warning 23, NWS Philadelphia/Mount Holly

September 30, 2016Caroline County, Queen Anne's County, Maryland; Kent County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 30, 2016, 6:44 AM EDT for Caroline County, Queen Anne's County, Maryland; Kent County, Delaware. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 30, 2016, 6:44 AM EDT (10:44 UTC)
Expired: Sep 30, 2016, 10:45 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Kent County, DE, Caroline County, MD, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 23 km from the middle of the area, began a volume at 10:46 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 10.7 hours before the alert went out and 111 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: 1819 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 281 m²/s²
0-3 km storm-relative helicity: 302 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

548 
WGUS41 KPHI 301044
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
644 AM EDT FRI SEP 30 2016

DEC001-MDC011-035-301445-
/O.NEW.KPHI.FA.W.0023.160930T1044Z-160930T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT DE-QUEEN ANNE'S MD-CAROLINE MD-
644 AM EDT FRI SEP 30 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* FLOOD WARNING FOR...
  KENT COUNTY IN CENTRAL DELAWARE...
  SOUTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
  CAROLINE COUNTY IN EASTERN MARYLAND...

* UNTIL 1045 AM EDT

* AT 641 AM EDT...RAINFALL ACROSS PORTIONS OF THE WARNED AREA HAS
  EXCEEDED 8 INCHES THE LAST 36 HOURS. LOCAL CREEKS AND STREAMS
  CONTINUED TO RISE. DO NOT DRIVE BARRIERS IF ENCOUNTER ROADS
  THAT ARE CLOSED
 
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  DOVER...SMYRNA...MILFORD...DENTON...HARRINGTON...CAMDEN...
  CLAYTON...FEDERALSBURG...GREENSBORO...OAKLAND...RIDGELY...
  CHESWOLD...PRESTON...BOWERS...GOLDSBORO...QUEEN ANNE...WOODSIDE...
  VIOLA...HARTLY AND HARMONY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...



DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 3871 7584 3868 7593 3870 7599 3875 7600
      3881 7590 3888 7595 3901 7597 3925 7575
      3934 7546 3915 7537 3905 7537 3895 7530
      3896 7539 3892 7541 3891 7547 3884 7559
      3883 7572 3865 7571

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 30, 2:40 AM EDT	Areal Flood Warning	PHI	Caroline, Queen Anne's	4 hr
Sep 30, 3:34 AM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	4 hr
Sep 30, 7:24 AM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	4 hr
Sep 30, 10:30 AM EDT	Areal Flood Warning	PHI	Caroline, Queen Anne's	4 hr
Sep 30, 2:29 PM EDT	Areal Flood Warning	PHI	Caroline, Queen Anne's	19 hr
Sep 30, 1:40 AM EDT	Coastal Flood Advisory	PHI	Kent, New Castle, Sussex	13 hr
Sep 30, 4:09 AM EDT	River Flood Warning	PHI	New Castle	13 hr
Sep 30, 5:29 AM EDT	Areal Flood Warning	PHI	Sussex	4 hr
Sep 30, 9:02 AM EDT	Areal Flood Warning	PHI	Sussex	39 hr
Sep 30, 3:03 PM EDT	Coastal Flood Advisory	PHI	Kent, Sussex	20 hr
Sep 30, 6:04 PM EDT	Rip Current Statement	PHI	Sussex	3 hr

Nearby

Areal Flood Warnings in Maryland, 2016 Areal Flood Warnings in Delaware, 2016 Every areal flood warning 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.