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LWX issues Flood Watch valid at May 27, 4:00 AM EDT for Eastern Garrett, Extreme Western Allegany, Western Garrett [MD] and Western Grant, Western Mineral, Western Pendleton [WV] till May 27, 4:00 PM EDT

https://mesonet.agron.iastate.edu/vtec/f/2026-O-NEW-KLWX-FA-A-0001_2026-05-27T08:00Z

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NWS Washington DC Bot @[email protected] · 2026-05-26 · 16:19 UTC

LWX issues Flood Watch valid at May 27, 4:00 AM EDT for Eastern Garrett, Extreme Western Allegany, Western Garrett [MD] and Western Grant, Western Mineral, Western Pendleton [WV] till May 27, 4:00 PM EDT

https://mesonet.agron.iastate.edu/vtec/f/2026-O-NEW-KLWX-FA-A-0001_2026-05-27T08:00Z

#dcwx #mdwx #vawx

NWS Washington DC Bot @[email protected] · 2026-05-26 · 16:19 UTC

LWX issues Flood Watch valid at May 27, 4:00 AM EDT for Eastern Garrett, Extreme Western Allegany, Western Garrett [MD] and Western Grant, Western Mineral, Western Pendleton [WV] till May 27, 4:00 PM EDT

https://mesonet.agron.iastate.edu/vtec/f/2026-O-NEW-KLWX-FA-A-0001_2026-05-27T08:00Z

#dcwx #mdwx #vawx

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NWS Washington DC Bot @[email protected] · 2026-05-26 · 16:19 UTC

LWX issues Flood Watch valid at May 27, 4:00 AM EDT for Eastern Garrett, Extreme Western Allegany, Western Garrett [MD] and Western Grant, Western Mineral, Western Pendleton [WV] till May 27, 4:00 PM EDT

https://mesonet.agron.iastate.edu/vtec/f/2026-O-NEW-KLWX-FA-A-0001_2026-05-27T08:00Z

#dcwx #mdwx #vawx

NWS Washington DC Bot @[email protected] · 2026-05-26 · 15:00 UTC

LWX issues Hazardous Weather Outlook (HWO) at May 26, 11:00 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261500-KLWX-FLUS41-HWOLWX

#dcwx #mdwx #vawx

NWS Washington DC Bot @[email protected] · 2026-05-26 · 15:00 UTC

LWX issues Hazardous Weather Outlook (HWO) at May 26, 11:00 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261500-KLWX-FLUS41-HWOLWX

#dcwx #mdwx #vawx

NWS Washington DC Bot @[email protected] · 2026-05-26 · 15:00 UTC

LWX issues Hazardous Weather Outlook (HWO) at May 26, 11:00 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261500-KLWX-FLUS41-HWOLWX

#dcwx #mdwx #vawx

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NWS Washington DC Bot @[email protected] · 2026-05-26 · 15:00 UTC

LWX issues Hazardous Weather Outlook (HWO) at May 26, 11:00 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261500-KLWX-FLUS41-HWOLWX

#dcwx #mdwx #vawx

NWS Washington DC Bot @[email protected] · 2026-05-26 · 13:00 UTC

LWX issues Area Forecast Discussion (AFD) at May 26, 9:00 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261300-KLWX-FXUS61-AFDLWX

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NWS Washington DC Bot @[email protected] · 2026-05-26 · 13:00 UTC

LWX issues Area Forecast Discussion (AFD) at May 26, 9:00 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261300-KLWX-FXUS61-AFDLWX

#dcwx #mdwx #vawx

NWS Washington DC Bot @[email protected] · 2026-05-26 · 13:00 UTC

LWX issues Area Forecast Discussion (AFD) at May 26, 9:00 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261300-KLWX-FXUS61-AFDLWX

#dcwx #mdwx #vawx

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NWS Washington DC Bot @[email protected] · 2026-05-26 · 13:00 UTC

LWX issues Area Forecast Discussion (AFD) at May 26, 9:00 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261300-KLWX-FXUS61-AFDLWX

#dcwx #mdwx #vawx

NWS Washington DC Bot @[email protected] · 2026-05-26 · 10:49 UTC

LWX issues Hazardous Weather Outlook (HWO) at May 26, 6:48 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261048-KLWX-FLUS41-HWOLWX

#dcwx #mdwx #vawx

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NWS Washington DC Bot @[email protected] · 2026-05-26 · 10:49 UTC

LWX issues Hazardous Weather Outlook (HWO) at May 26, 6:48 AM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605261048-KLWX-FLUS41-HWOLWX

#dcwx #mdwx #vawx

NWS Washington DC Bot @[email protected] · 2026-05-26 · 10:48 UTC

LWX cancels Dense Fog Advisory for Carroll, Cecil, Northern Baltimore, Northwest Harford, Southeast Harford [MD]

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CAN-KLWX-FG-Y-0012_2026-05-26T10:47Z

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NWS Washington DC Bot @[email protected] · 2026-05-26 · 10:48 UTC

LWX cancels Dense Fog Advisory for Carroll, Cecil, Northern Baltimore, Northwest Harford, Southeast Harford [MD]

https://mesonet.agron.iastate.edu/vtec/f/2026-O-CAN-KLWX-FG-Y-0012_2026-05-26T10:47Z

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BakersRelay @[email protected] · 2026-05-26 · 10:14 UTC

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Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
315 AM EDT Tue May 26 2026

MARINE

Light southeast winds develop this afternoon, then become variable tonight into Wednesday. Areas of dense fog are possible this morning. Thunderstorms are possible across the waters Wednesday afternoon, and Special Marine Warnings may be needed. Small Craft Advisory conditions are possible Thursday into Thursday night.

Wind gusts predominantly stay below SCA criteria on Friday, but could briefly approach low-end SCA criteria in the southern portions of the Chesapeake Bay in the morning. Winds start to increase over the waters late Saturday afternoon and evening, with SCAs becoming a possibility over the southern Bay during then. Northerly winds briefly trend southerly on Friday night before flowing northerly again by Saturday evening.

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BakersRelay @[email protected] · 2026-05-26 · 10:14 UTC

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Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
315 AM EDT Tue May 26 2026

WHAT HAS CHANGED

Continue to monitor developing fog across the area that could require a Dense Fog Advisory. For this afternoon, models indicate some flood threat will be present due to slow storm motion and heavy rainfall.

KEY MESSAGES

- 1) Localized flood threat today, with flood and severe thunderstorm threats areawide Wednesday.

- 2) High pressure moves into the region Friday, with temperatures remaining seasonable into next week.

DISCUSSION

KEY MESSAGE 1...Localized flood threat today, with flood and severe thunderstorm threats areawide Wednesday.

Weak surface high to the north will push offshore while a stalled frontal boundary lingers over the region through Wednesday. Areas of mist and fog this morning slowly dissipate after sunrise, with spotty showers possible through the early afternoon.

The Bermuda High remains in place across the southwestern Atlantic, with split flow across the central CONUS converging over the Mid- Atlantic. Deep southerly flow on the western periphery of the Bermuda High continues to advect deep tropical moisture into our area. Expecting another round of diurnally driven showers and thunderstorms today. Light southeast flow develops today, which will favor showers and thunderstorms west of the Blue Ridge and in Central VA.

Storm motion is going to be slow and erratic due to weak low-level flow. Very high PWATs around 1.9" and a deep warm cloud layer could yield rainfall rates in excess of 1-2"/hr in the strongest storms. This could result in a flood threat, especially if thunderstorms become locked to the terrain (which could yield are higher flood threat for that local area). The RRFS and HRRR indicate this is a possibility. WPC has a Marginal Risk (level 1 of 4) for flash flooding in these areas, and that aligns well with the current thinking of how many heavy thunderstorms will develop. One of the underlying uncertainties is going to be where these storms develop. Overall, the flood threat is on the low side, but potential impacts could be higher.

By Wednesday the upper troughing to the north begins to slide south, with an accompanying cold front also pushing south through the Mid- Atlantic. The presence of growing instability, lingering deep layer moisture, and much more forcing/shear from the upper trough is going to introduce a severe weather threat for most of the area. Coverage of thunderstorms is still uncertain, but it will certainly be more than Tuesday. Storm motion is going to be faster as deep-layer winds increase, but locally heavy rainfall could produce some flood threat, especially in urban areas. SPC has introduced a Marginal Risk (level 1 of 5) for sever thunderstorms on Wednesday.

Dry conditions and sunshine finally return Thursday.

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NWS Washington DC Bot @[email protected] · 2026-05-24 · 01:30 UTC

LWX issues Area Forecast Discussion (AFD) at May 23, 9:29 PM EDT

https://mesonet.agron.iastate.edu/p.php?pid=202605240129-KLWX-FXUS61-AFDLWX

#dcwx #mdwx #vawx