Alert archive / Maryland / Flash Flood Warnings in 2021
Flash Flood Warning 6, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Jun 10, 2021, 4:52 PM EDT for Charles County, Prince George's County, Maryland. It was in force for 93 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 10, 2021, 4:52 PM EDT (20:52 UTC)
- Expired
- Jun 10, 2021, 6:25 PM EDT
- In force
- 93 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Charles County, MD, Prince George's County, MD
The radar
The Sterling radar (KLWX), 56 km from the middle of the area, began a volume at 20:56 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 10, 5:22 PM EDT | FLASH FLOOD | 1 Ese St. Charles, MD | VEHICLE STRANDED IN FLOODED ROADWAY NEAR INTERSECTION OF BANNISTER CIRCLE AND MANNING COURT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 49 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
- 163 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 987 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
245
WGUS51 KLWX 102052
FFWLWX
MDC017-033-110000-
/O.NEW.KLWX.FF.W.0006.210610T2052Z-210611T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Baltimore MD/Washington DC
452 PM EDT Thu Jun 10 2021
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Warning for...
Southern Prince Georges County in central Maryland...
Northern Charles County in southern Maryland...
* Until 800 PM EDT.
* At 452 PM EDT, local law enforcement reported thunderstorms
producing heavy rain in near Waldorf. Between 1 and 3 inches of
rain have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Law enforcement.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that may experience flash flooding include...
Waldorf... Fort Washington...
La Plata... Saint Charles...
Accokeek... Bryans Road...
Brandywine... Hughesville...
Baden... Potomac Heights...
Aquasco... Bryantown...
Pomfret... Port Tobacco Village...
White Plains... Northwood...
Dentsville... Port Tobacco...
Local fire departments reported multiple vehicles stranded in high
water in the Waldorf area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3861 7714 3862 7715 3862 7714 3871 7705
3871 7704 3871 7703 3872 7704 3863 7671
3846 7683 3846 7696
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
DHOF1 follow-up statement
779
WGUS71 KLWX 102225
FFSLWX
Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
625 PM EDT Thu Jun 10 2021
MDC017-033-102235-
/O.CAN.KLWX.FF.W.0006.000000T0000Z-210611T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Charles MD-Prince Georges MD-
625 PM EDT Thu Jun 10 2021
...FLASH FLOOD WARNING FOR SOUTHERN PRINCE GEORGES AND NORTHERN
CHARLES COUNTIES HAS BEEN REPLACED WITH A FLOOD WARNING...
LAT...LON 3861 7714 3862 7715 3862 7714 3871 7705
3871 7704 3871 7703 3872 7704 3863 7671
3846 7683 3846 7696
$$
BKFThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 9:10 PM EDT | Areal Flood Warning | LWX | Saint Mary's | 4 hr |
| Jun 10, 2:53 AM EDT | Flash Flood Watch | LWX | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more | 43 hr |
| Jun 10, 5:10 AM EDT | Areal Flood Warning | LWX | Saint Mary's | 47 min |
| Jun 10, 2:57 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 25 min |
| Jun 10, 2:59 PM EDT | Areal Flood Warning | LWX | Baltimore | 38 min |
| Jun 10, 2:59 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 46 min |
| Jun 10, 3:03 PM EDT | Areal Flood Warning | LWX | Carroll | 8 hr |
| Jun 10, 3:37 PM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 2 hr |
| Jun 10, 3:52 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Prince George's | 17 hr |
| Jun 10, 4:50 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 5 hr |
| Jun 10, 6:03 PM EDT | Areal Flood Warning | LWX | Baltimore, City of Baltimore | 2 hr |
| Jun 10, 6:25 PM EDT | Areal Flood Warning | LWX | Charles, Prince George's | 2 hr |
Nearby
Flash Flood Warnings in Maryland, 2021Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.