Alert archive / Maryland / Flash Flood Warnings in 2021
Flash Flood Warning 4, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Jun 9, 2021, 7:35 PM EDT for Saint Mary's County, Maryland. It was in force for 95 min. 2 reports 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 9, 2021, 7:35 PM EDT (23:35 UTC)
- Expired
- Jun 9, 2021, 9:10 PM EDT
- In force
- 95 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Saint Mary's County, MD
The radar
The Dover AFB radar (KDOX), 112 km from the middle of the area, began a volume at 23:39 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 9, 7:45 PM EDT | FLASH FLOOD | 2 Nne Piney Point, MD | A CAR WAS STRANDED IN HIGH WATER ON LOCUST GROVE DRIVE AT SAINT MARY'S RIVER. |
| Jun 9, 8:07 PM EDT | FLASH FLOOD | 2 Wnw Dameron, MD | MD-5 POINT LOOKOUT ROAD IMPASSABLE DUE TO FLOWING WATER BOTH WAYS AT VILLA ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.6 hours before the alert went out and 100 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
- 795 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 967 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
332
WGUS51 KLWX 092335
FFWLWX
MDC037-100245-
/O.NEW.KLWX.FF.W.0004.210609T2335Z-210610T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Baltimore MD/Washington DC
735 PM EDT Wed Jun 9 2021
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Warning for...
Southeastern St. Marys County in southern Maryland...
* Until 1045 PM EDT.
* At 735 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Doppler radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that may experience flash flooding include...
Lexington Park... Piney Point...
Tall Timbers... Saint Marys City...
Saint Marys River... Saint George Island...
Saint Inigoes Creek... Town Creek...
California... Patuxent River Naval Air
Station...
Drayden... Park Hall...
Great Mills... Valley Lee...
Callaway... Saint Inigoes...
Dameron... Ridge...
Scotland...
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3830 7659 3833 7656 3833 7651 3832 7648
3829 7644 3829 7643 3813 7630 3810 7630
3808 7640 3811 7650 3813 7653 3821 7657
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKF1 follow-up statement
527
WGUS71 KLWX 100110
FFSLWX
Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
910 PM EDT Wed Jun 9 2021
MDC037-100120-
/O.CAN.KLWX.FF.W.0004.000000T0000Z-210610T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Marys MD-
910 PM EDT Wed Jun 9 2021
...FLASH FLOOD WARNING FOR SOUTHEASTERN ST. MARYS COUNTY HAS BEEN
REPLACED WITH A FLOOD WARNING...
LAT...LON 3830 7659 3833 7656 3833 7651 3832 7648
3829 7644 3829 7643 3813 7630 3810 7630
3808 7640 3811 7650 3813 7653 3821 7657
$$
BKFThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 5:14 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 46 min |
| Jun 9, 6:09 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 30 min |
| Jun 9, 6:55 PM EDT | Areal Flood Warning | LWX | Saint Mary'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.