Alert archive / Maryland / Flash Flood Warnings in 2019
Flash Flood Warning 29, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Jul 31, 2019, 1:36 PM EDT for Allegany County, Maryland. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 31, 2019, 1:36 PM EDT (17:36 UTC)
- Expired
- Jul 31, 2019, 4:12 PM EDT
- In force
- 3 hr
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Flood severity
- None
County Allegany County, MD
The radar
The Sterling radar (KLWX), 127 km from the middle of the area, began a volume at 17:39 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.6 hours before the alert went out and 134 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
- 224 J/kg
- Mixed-layer CIN
- -161 J/kg
- Mixed-layer LCL
- 1257 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -56 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before this flash flood warning went out at Jul 31, 10:24 AM EDT, 3 hours 12 minutes earlier.
Area forecast discussion, Jul 31, 10:24 AM EDT, 3 hours 12 minutes before
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</html>Hazardous weather outlook, Jul 31, 1:30 PM EDT, 6 minutes before
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 130 PM EDT Wed Jul 31 2019 ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-011000- Chesapeake Bay north of Pooles Island MD- Chesapeake Bay from Pooles Island to Sandy Point MD- Chesapeake Bay from Sandy Point to North Beach MD- Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Tidal Potomac from Key Bridge to Indian Head MD- Tidal Potomac from Indian Head to Cobb Island MD- Tidal Potomac from Cobb Island MD to Smith Point VA- Patapsco River including Baltimore Harbor- Chester River to Queenstown MD-Eastern Bay- Choptank River to Cambridge MD and the Little Choptank River- Patuxent River to Broomes Island MD- Tangier Sound and the inland waters surrounding Bloodsworth Island-District of Columbia-Southern Baltimore-Prince Georges- Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George- 130 PM EDT Wed Jul 31 2019 This Hazardous Weather Outlook is for the Maryland portion of the Chesapeake Bay, Tidal Potomac River, and adjacent counties in central Maryland and northern Virginia as well as the District of Columbia. .DAY ONE...This Afternoon and Tonight Severe Thunderstorm Watch 547 is in effect until 9 PM for the outlook area. Thunderstorms may produce scattered incidents of damaging wind gusts this afternoon and evening. Heavy rain may also lead to isolated instances of flooding and the highest risk is along the I-95 corridor where a Flash Flood Watch is in effect. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorms may produce heavy rainfall which may result in isolated instances of flooding Thursday and Friday. The highest risk is south of the US 50 corridor. .SPOTTER INFORMATION STATEMENT... The spotter network has been activated. MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053- 055-501>506-011000- Washington-Frederick MD-Carroll-Northern Baltimore- Extreme Western Allegany-Central and Eastern Allegany- Northwest Montgomery-Central and Southeast Montgomery- Northwest Howard-Central and Southeast Howard-Northwest Harford- Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke- Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Northern Fauquier-Southern Fauquier-Western Highland- Eastern Highland-Western Loudoun-Eastern Loudoun- Northern Virginia Blue Ridge-Central Virginia Blue Ridge- Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant- Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton- Eastern Pendleton- 130 PM EDT Wed Jul 31 2019 This Hazardous Weather Outlook is for eastern West Virginia, northern and central Virginia, and central and western Maryland with the exception of Garrett County. .DAY ONE...This Afternoon and Tonight Severe Thunderstorm Watch 547 is in effect until 9 PM for portions of central and northern Maryland and northern and central Virginia. Thunderstorms may produce scattered incidents of damaging wind gusts this afternoon and evening. Heavy rain may also lead to isolated instances of flooding and the highest risk is along the I-95 corridor where a Flash Flood Watch is in effect. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorms may produce heavy rainfall which may result in isolated instances of flooding Thursday and Friday. The highest risk is south of the US 50 corridor. .SPOTTER INFORMATION STATEMENT... The spotter network has been activated.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 9:25 PM EDT | Areal Flood Warning | LWX | Albemarle | 86 min |
| Jul 31, 12:02 PM EDT | Flash Flood Watch | LWX | Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church | 7 hr |
| Jul 31, 2:36 PM EDT | Special Marine Warning | LWX | 84 min | |
| Jul 31, 2:48 PM EDT | Severe Thunderstorm Warning | LWX | Rockingham, City of Harrisonburg | 42 min |
| Jul 31, 2:56 PM EDT | Flash Flood Warning | LWX | Augusta | 3 hr |
| Jul 31, 3:03 PM EDT | Severe Thunderstorm Warning | LWX | Augusta | 15 min |
| Jul 31, 3:04 PM EDT | Severe Thunderstorm Warning | LWX | Augusta | 41 min |
| Jul 31, 3:22 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Augusta, Greene, Rockingham | 38 min |
| Jul 31, 3:25 PM EDT | Severe Thunderstorm Warning | LWX | Greene, Madison, Page, Rockingham | 50 min |
| Jul 31, 3:28 PM EDT | Flash Flood Warning | LWX | Greene, Madison | 2 hr |
| Jul 31, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | Page, Rockingham | 44 min |
| Jul 31, 3:33 PM EDT | Special Marine Warning | LWX | 87 min | |
| Jul 31, 3:39 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Nelson | 40 min |
| Jul 31, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Augusta, Nelson, City of Charlottesville, City of Waynesboro | 40 min |
| Jul 31, 3:57 PM EDT | Areal Flood Warning | LWX | Albemarle, Augusta, Greene, Nelson, Page, Rockingham and 1 more | 2 hr |
| Jul 31, 4:01 PM EDT | Special Marine Warning | LWX | 33 min | |
| Jul 31, 4:03 PM EDT | Special Marine Warning | LWX | 87 min | |
| Jul 31, 4:04 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Madison, Orange | 41 min |
| Jul 31, 4:13 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Greene, Madison, Orange | 47 min |
| Jul 31, 4:18 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, City of Charlottesville | 57 min |
| Jul 31, 4:37 PM EDT | Special Marine Warning | LWX | 83 min | |
| Jul 31, 4:42 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Madison, Orange, Spotsylvania | 63 min |
| Jul 31, 4:53 PM EDT | Special Marine Warning | LWX | 97 min | |
| Jul 31, 4:55 PM EDT | Special Marine Warning | LWX | 95 min | |
| Jul 31, 5:05 PM EDT | Severe Thunderstorm Warning | LWX | Orange, Spotsylvania | 29 min |
| Jul 31, 5:25 PM EDT | Special Marine Warning | LWX | 95 min | |
| Jul 31, 5:29 PM EDT | Special Marine Warning | LWX | 67 min | |
| Jul 31, 5:36 PM EDT | Severe Thunderstorm Warning | LWX | Spotsylvania, Stafford, City of Fredericksburg | 17 min |
| Jul 31, 5:48 PM EDT | Special Marine Warning | LWX | 73 min | |
| Jul 31, 6:01 PM EDT | Special Marine Warning | LWX | 59 min | |
| Jul 31, 6:22 PM EDT | Special Marine Warning | LWX | 83 min | |
| Jul 31, 6:41 PM EDT | Special Marine Warning | LWX | 58 min | |
| Jul 31, 6:52 PM EDT | Special Marine Warning | LWX | 67 min | |
| Jul 31, 7:11 PM EDT | Special Marine Warning | LWX | 69 min | |
| Jul 31, 2:46 AM EDT | Coastal Flood Advisory | LWX | Anne Arundel | 4 hr |
| Jul 31, 1:39 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 36 min |
| Jul 31, 2:15 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 30 min |
| Jul 31, 2:46 PM EDT | Areal Flood Warning | LWX | Allegany | 2 hr |
| Jul 31, 4:45 PM EDT | Severe Thunderstorm Warning | LWX | Calvert | 45 min |
| Jul 31, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert | 39 min |
| Jul 31, 5:56 PM EDT | Areal Flood Warning | LWX | Calvert | 98 min |
| Jul 31, 5:58 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 46 min |
| Jul 31, 6:16 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert | 44 min |
| Jul 31, 3:16 PM EDT | Severe Thunderstorm Warning | LWX | Hampshire | 44 min |
| Jul 31, 3:41 PM EDT | Areal Flood Warning | LWX | Grant | 4 hr |
| Jul 31, 3:46 PM EDT | Severe Thunderstorm Warning | LWX | Hampshire | 44 min |
Nearby
Flash Flood Warnings in Maryland, 2019Every flash flood warning in 2019
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.