Alert archive / Maryland / Flash Flood Warnings in 2021
Flash Flood Warning 5, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Jun 10, 2021, 3:37 PM EDT for Baltimore County, City of Baltimore, Maryland. It was in force for 2 hr. 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, 3:37 PM EDT (19:37 UTC)
- Expired
- Jun 10, 2021, 6:03 PM EDT
- In force
- 2 hr
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Baltimore County, MD, City of Baltimore, MD
The radar
The Sterling radar (KLWX), 97 km from the middle of the area, began a volume at 19:38 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, 3:54 PM EDT | FLOOD | Parkville, MD | CAR STRANDED IN WATER NEAR INTERSECTION OF HARRIS AVE AND RADER AVE. |
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, 7.6 hours before the alert went out and 92 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.
207
WGUS51 KLWX 101937
FFWLWX
MDC005-510-110100-
/O.NEW.KLWX.FF.W.0005.210610T1937Z-210611T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Baltimore MD/Washington DC
337 PM EDT Thu Jun 10 2021
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Warning for...
Central Baltimore County in northern Maryland...
The Baltimore City in northern Maryland...
* Until 900 PM EDT.
* At 337 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. Local emergency management officials report numerous road
closures due to high water and stream gauges on Beaverdam Run and
Minebank Run indicate rapidly rising waters.
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...
Baltimore... Cockeysville...
Towson... Parkville...
Carney... Perry Hall...
Rossville... Mays Chapel...
Timonium... White Marsh...
Hampton... Kingsville...
Lutherville-Timonium... Lutherville...
Loch Raven... Long Green...
Glen Arm... Loch Raven Village...
Hydes... Eudowood...
Additional rainfall amounts up to 1 inch 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 3937 7660 3950 7668 3952 7663 3952 7656
3950 7647 3943 7642 3937 7641
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKF1 follow-up statement
798
WGUS71 KLWX 102203
FFSLWX
Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
603 PM EDT Thu Jun 10 2021
MDC005-510-102213-
/O.CAN.KLWX.FF.W.0005.000000T0000Z-210611T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baltimore MD-Baltimore City MD-
603 PM EDT Thu Jun 10 2021
...FLASH FLOOD WARNING FOR CENTRAL BALTIMORE COUNTY AND BALTIMORE
CITY HAS BEEN REPLACED WITH A FLOOD WARNING...
LAT...LON 3937 7660 3950 7668 3952 7663 3952 7656
3950 7647 3943 7642 3937 7641
$$
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, 3:52 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, 4:52 PM EDT | Flash Flood Warning | LWX | Charles, Prince George's | 93 min |
| 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.