Alert archive / Maryland / Flash Flood Warnings in 2022

Flash Flood Warning 50, NWS Baltimore/Washington

August 5, 2022Prince George's County, Maryland

NWS Baltimore/Washington issued this flash flood warning at Aug 5, 2022, 4:53 PM EDT for Prince George's County, Maryland. It was in force for 106 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 5, 2022, 4:53 PM EDT (20:53 UTC)
Expired
Aug 5, 2022, 6:39 PM EDT
In force
106 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Flood severity
None

County Prince George's County, MD

The radar

The Sterling radar (KLWX), 58 km from the middle of the area, began a volume at 20:53 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, 8.9 hours before the alert went out and 50 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.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2022-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 499 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2022-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
499 J/kg
Mixed-layer CIN
-133 J/kg
Mixed-layer LCL
850 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Aug 5, 3:32 PM EDT, 1 hour 21 minutes earlier.

Area forecast discussion, Aug 5, 3:32 PM EDT, 1 hour 21 minutes before
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Hazardous weather outlook, Aug 5, 11:40 AM EDT, 5 hours 13 minutes before
Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
1140 AM EDT Fri Aug 5 2022

ANZ530>543-DCZ001-MDZ008-011-013-014-016>018-504-506-508-
VAZ052>057-061000-
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-Cecil-Southern Baltimore-
Prince Georges-Anne Arundel-Charles-St. Marys-Calvert-
Central and Southeast Montgomery-Central and Southeast Howard-
Southeast Harford-Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-
1140 AM EDT Fri Aug 5 2022

This Hazardous Weather Outlook is for the Maryland portion of the
Chesapeake Bay, Tidal Potomac River, and I-95 corridor through
central Maryland, northern Virginia, and District of Columbia.

.DAY ONE...This Afternoon and Tonight

A Flood Watch is in effect for all locations except Cecil County
from 3 PM until 11 PM.

Thunderstorms may also be capable of producing gusty winds later
this afternoon into this evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible at times into the weekend.

MDZ003>006-503-505-507-VAZ025>031-036>040-050-051-501-502-505>508-
WVZ050>053-055-061000-
Washington-Frederick MD-Carroll-Northern Baltimore-
Northwest Montgomery-Northwest Howard-Northwest Harford-Augusta-
Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke-Nelson-
Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper-
Northern Fauquier-Southern Fauquier-Western Loudoun-
Eastern Loudoun-Northern Virginia Blue Ridge-
Central Virginia Blue Ridge-Hampshire-Morgan-Berkeley-Jefferson-
Hardy-
1140 AM EDT Fri Aug 5 2022

This Hazardous Weather Outlook is for portions of eastern West
Virginia, northern and central Virginia, and central and western
Maryland.

.DAY ONE...This Afternoon and Tonight

A Flood Watch is in effect from noon until 11 PM to the west of
the Blue Ridge, and from 3 PM until 11 PM to the east of the Blue
Ridge.

Thunderstorms may also be capable of producing gusty winds later
this afternoon into this evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible at times into the weekend.

MDZ001-501-502-VAZ503-504-WVZ501>506-061000-
Garrett-Extreme Western Allegany-Central and Eastern Allegany-
Western Highland-Eastern Highland-Western Grant-Eastern Grant-
Western Mineral-Eastern Mineral-Western Pendleton-
Eastern Pendleton-
1140 AM EDT Fri Aug 5 2022

This Hazardous Weather Outlook is for the Allegheny Front
counties in western Maryland, eastern West Virginia, and Highland
County Virginia.

.DAY ONE...This Afternoon and Tonight

A Flood Watch is in effect from noon until 11 PM.

Thunderstorms may also be capable of producing gusty winds later
this afternoon into this evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible at times into the weekend.

In the hours before

Local storm report, Aug 5, 11:29 AM EDT, 5 hours 24 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1129 AM EDT FRI AUG 05 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0650 PM     LIGHTNING        1 N THE WHITE HOUSE     38.91N  77.04W
08/04/2022                   DISTRICT OF COLUMB DC   FIRE DEPT/RESCUE

            *** 2 FATAL, 2 INJ *** 4 PEOPLE STANDING NEAR A TREE IN
            LAFAYETTE PARK WERE STRUCK BY LIGHTNING. 2 WERE KILLED.
            2 HAD CRITICAL INJURIES.

&&

CORRECTED EVENT TIME...LOCATION...FATALITIES...INJURIES...REMARKS...
SOURCE...

EVENT NUMBER LWX2204661

STRONG
Local storm report, Aug 5, 4:01 PM EDT, 52 minutes before
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Local storm report, Aug 5, 4:51 PM EDT, 2 minutes before
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Local storm report, Aug 5, 4:52 PM EDT, 1 minute before
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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 4, 8:08 PM EDTSevere Thunderstorm WarningLWXFauquier, Rappahannock, Warren52 min
Aug 4, 8:44 PM EDTSevere Thunderstorm WarningLWXFairfax, Fauquier, Loudoun, Prince William30 min
Aug 4, 9:03 PM EDTSpecial Marine WarningLWX87 min
Aug 4, 9:12 PM EDTSpecial Marine WarningLWX18 min
Aug 4, 10:16 PM EDTFlash Flood WarningLWXArlington2 hr
Aug 5, 12:30 AM EDTSpecial Marine WarningLWX45 min
Aug 5, 10:20 AM EDTFlood WatchLWXAlbemarle, Amherst, Arlington, Augusta, Clarke, Culpeper and 27 more11 hr
Aug 5, 1:14 PM EDTFlash Flood WarningLWXRockingham3 hr
Aug 5, 1:57 PM EDTSevere Thunderstorm WarningLWXMadison16 min
Aug 5, 2:13 PM EDTAreal Flood WarningLWXRockingham104 min
Aug 5, 2:35 PM EDTAreal Flood WarningLWXAugusta, Nelson84 min
Aug 5, 3:54 PM EDTSevere Thunderstorm WarningLWXPrince William, City of Manassas, City of Manassas Park36 min
Aug 5, 3:58 PM EDTAreal Flood WarningLWXRockingham3 hr
Aug 5, 4:00 PM EDTSpecial Marine WarningLWX60 min
Aug 5, 4:56 PM EDTSpecial Marine WarningLWX44 min
Aug 5, 5:04 PM EDTSpecial Marine WarningLWX36 min
Aug 5, 5:39 PM EDTSpecial Marine WarningLWX96 min
Aug 5, 5:42 PM EDTAreal Flood WarningLWXFairfax4 hr
Aug 5, 5:47 PM EDTSpecial Marine WarningLWX58 min
Aug 5, 5:54 PM EDTSpecial Marine WarningLWX66 min
Aug 5, 6:13 PM EDTSpecial Marine WarningLWX92 min
Aug 5, 6:51 PM EDTSpecial Marine WarningLWX84 min
Aug 5, 6:54 PM EDTSpecial Marine WarningLWX96 min
Aug 5, 6:57 PM EDTSpecial Marine WarningLWX93 min
Aug 5, 7:35 PM EDTSpecial Marine WarningLWX85 min
Aug 5, 7:54 PM EDTSpecial Marine WarningLWX96 min
Aug 4, 8:31 PM EDTAreal Flood WarningLWXBaltimore, City of Baltimore8 hr
Aug 4, 8:31 PM EDTAreal Flood WarningLWXBaltimore, City of Baltimore8 hr
Aug 5, 12:37 AM EDTSevere Thunderstorm WarningLWXHoward, Montgomery, Prince George's17 min
Aug 5, 4:31 PM EDTAreal Flood WarningLWXAllegany, Garrett3 hr
Aug 5, 4:45 PM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's30 min
Aug 5, 4:52 PM EDTSevere Thunderstorm WarningLWXCharles38 min
Aug 5, 5:44 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Howard, City of Baltimore31 min
Aug 5, 6:08 PM EDTFlash Flood WarningLWXBaltimore, City of Baltimore115 min
Aug 5, 6:29 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's31 min
Aug 5, 6:39 PM EDTAreal Flood WarningLWXPrince George's4 hr
Aug 5, 7:08 PM EDTAreal Flood WarningLWXSaint Mary's2 hr
Aug 5, 1:37 PM EDTSevere Thunderstorm WarningLWXPendleton23 min

Nearby

Flash Flood Warnings in Maryland, 2022Every flash flood warning in 2022

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.