Alert archive / Maryland / Areal Flood Advisories in 2021
Areal Flood Advisory 36, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Jun 14, 2021, 11:39 PM EDT for Caroline County, Kent County, Queen Anne's County, Maryland; Kent County, New Castle County, Delaware. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Jun 14, 2021, 11:39 PM EDT (03:39 UTC)
- Expired
- Jun 15, 2021, 1:04 AM EDT
- In force
- 85 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 33 km from the middle of the area, began a volume at 03:40 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, 3.7 hours before the alert went out and 131 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
- 464 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 989 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
The text
As transmitted.
122
WGUS81 KPHI 150339
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
1139 PM EDT Mon Jun 14 2021
DEC001-003-MDC011-029-035-150545-
/O.NEW.KPHI.FA.Y.0036.210615T0339Z-210615T0545Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-New Castle DE-Caroline MD-Kent MD-Queen Anne's MD-
1139 PM EDT Mon Jun 14 2021
The National Weather Service in Mount Holly has issued a
* Flood Advisory for...
Kent County in central Delaware...
Southwestern New Castle County in northern Delaware...
Northern Caroline County in eastern Maryland...
Eastern Kent County in northeastern Maryland...
Eastern Queen Anne's County in northeastern Maryland...
* Until 145 AM EDT.
* At 1139 PM EDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1.5 inches of rain
have fallen in spots.
* Some locations that may experience flooding include...
Dover, Middletown, Smyrna, Milford, Harrington, Camden, Clayton,
Greensboro, Oakland, Ridgely, Cheswold, and Millington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3892 7597 3937 7594 3936 7589 3938 7582
3938 7577 3943 7577 3949 7556 3922 7533
3893 7529 3893 7531 3894 7531 3894 7532
3895 7531 3895 7532 3896 7538 3892 7542
3890 7595 3892 7594
$$
Iovino1 follow-up statement
880
WGUS81 KPHI 150504
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
104 AM EDT Tue Jun 15 2021
DEC001-003-MDC011-029-035-150514-
/O.CAN.KPHI.FA.Y.0036.000000T0000Z-210615T0545Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-New Castle DE-Caroline MD-Kent MD-Queen Anne's MD-
104 AM EDT Tue Jun 15 2021
...FLOOD ADVISORY IS CANCELLED FOR KENT, SOUTHWESTERN NEW CASTLE,
NORTHERN CAROLINE, EASTERN KENT, AND EASTERN QUEEN ANNE'S COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3892 7597 3937 7594 3936 7589 3938 7582
3938 7577 3943 7577 3949 7556 3922 7533
3893 7529 3893 7531 3894 7531 3894 7532
3895 7531 3895 7532 3896 7538 3892 7542
3890 7595 3892 7594
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 10:23 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 67 min |
| Jun 14, 10:55 PM EDT | Areal Flood Advisory | PHI | Kent, Queen Anne's | 2 hr |
| Jun 14, 11:03 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 57 min |
| Jun 14, 11:12 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 63 min |
| Jun 14, 11:42 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 63 min |
| Jun 14, 11:51 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 54 min |
| Jun 14, 11:54 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 66 min |
| Jun 14, 8:55 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 50 min |
Nearby
Areal Flood Advisories in Maryland, 2021Areal Flood Advisories in Delaware, 2021Every areal flood advisory in 2021
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.