A Severe Thunderstorm Watch is now in effect for Fairfax County.
The National Weather Service issued the watch at 3 p.m. today (Tuesday). It will last until 9 p.m.
Forecasters say stray thunderstorms and showers are possible for the Tysons area.
A Severe Thunderstorm Watch (in pink) is in effect until 9 PM for most of our forecast area for the potential for damaging thunderstorm. Primary threats will be damaging winds and large hail. pic.twitter.com/PoSu9vIjcT
— NWS Baltimore-Washington (@NWS_BaltWash) August 20, 2019
File photo
Updated at 4:25 p.m. — Fairfax County is now under a Flood Warning.
Earlier: Fairfax County and surrounding areas could see some major thunderstorms and damaging winds this afternoon (Thursday).
The National Weather Service recently issued a Severe Thunderstorm Warning that will last until 4 p.m.
More from the National Weather Service:
Until 400 PM EDT.
* At 316 PM EDT, a severe thunderstorm was located over Chantilly, or near Centreville, moving southeast at 15 mph.
HAZARD…60 mph wind gusts.
SOURCE…Radar indicated.
IMPACT…Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles.
Severe Thunderstorm Warning including Ashburn VA, Sterling VA, South Riding VA until 3:30 PM EDT pic.twitter.com/0wkWMqlwh7
— NWS Baltimore-Washington (@NWS_BaltWash) August 15, 2019
A Severe Thunderstorm Warning is in effect for #FairfaxCounty! Remember, when thunder roars, go indoors! Wait 30 minutes after storm before going back outside! #SafeFairfax #FCFRD pic.twitter.com/BtLpAUl5bQ
— Fairfax County Fire/Rescue (@ffxfirerescue) August 15, 2019
The National Weather Service issued Flash Flood Watch for Fairfax County and surrounding areas.
The watch was issued around noon and is in effect until 8 p.m. tonight (July 31).
More from NWS:
* Until 8 PM EDT this evening
* Showers and thunderstorms capable of producing very heavy
rainfall are expected across the area this afternoon and into
the evening. This heavy rain may lead to localized total
rainfall amounts of up to 3 inches. Much of this rain may fall
in short periods of time in any given location, resulting in the
risk for flash flooding.
Heavy rain up to 3 inches could pose a risk for flash flooding, according to NWS.
A Flash Flood Watch has been issued for areas along the I-95 corridor from Washington D.C northward through Maryland until 8 pm. Showers and thunderstorms capable of producing heavy rain may lead to localized areas of flash flooding. pic.twitter.com/YH3IWjo14R
— NWS Baltimore-Washington (@NWS_BaltWash) July 31, 2019
File photo
Update at 2:50 p.m. — The National Weather Service has issued a Severe Thunderstorm Warning for portions of McLean, Vienna and Tysons.
More from NWS:
THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR… THE NORTHWESTERN DISTRICT OF COLUMBIA… SOUTHEASTERN MONTGOMERY COUNTY IN CENTRAL MARYLAND… NORTHWESTERN PRINCE GEORGES COUNTY IN CENTRAL MARYLAND… EAST CENTRAL LOUDOUN COUNTY IN NORTHERN VIRGINIA… NORTHEASTERN FAIRFAX COUNTY IN NORTHERN VIRGINIA…
* UNTIL 330 PM EDT.
* AT 244 PM EDT, A SEVERE THUNDERSTORM WAS LOCATED OVER RESTON, MOVING EAST AT 25 MPH.
HAZARD…60 MPH WIND GUSTS.
SOURCE…RADAR INDICATED.
IMPACT…DAMAGING WINDS WILL CAUSE SOME TREES AND LARGE BRANCHES TO FALL. THIS COULD INJURE THOSE OUTDOORS, AS WELL AS DAMAGE HOMES AND VEHICLES. ROADWAYS MAY BECOME BLOCKED BY DOWNED TREES. LOCALIZED POWER OUTAGES ARE POSSIBLE. UNSECURED LIGHT OBJECTS MAY BECOME PROJECTILES.
* LOCATIONS IMPACTED INCLUDE… ROCKVILLE, BETHESDA, GAITHERSBURG, RESTON, OLNEY, HERNDON, LANGLEY PARK, VIENNA, LOWES ISLAND, MCLEAN, AMERICAN LEGION BRIDGE, ASPEN HILL, POTOMAC, NORTH BETHESDA, OAKTON, STERLING, NORTH POTOMAC, TYSONS CORNER, HYATTSVILLE AND WHITE OAK.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING.
Severe Thunderstorm Warning including Silver Spring MD, Rockville MD, Bethesda MD until 3:30 PM EDT pic.twitter.com/ijRuDDuZlF
— NWS Baltimore-Washington (@NWS_BaltWash) July 22, 2019
Earlier: Fairfax County and surrounding areas could see some thunderstorms, flash flooding, rain and strong wind today (Monday).
The National Weather Service recently issued a Severe Thunderstorm Watch that will go into effect at 10 p.m. — possibly overlapping with the Flash Flood Watch, which begins at 3 p.m. and lasts until “late tonight.”
The county can expect heavy rain around 1-2 inches that could cause flash flooding later this afternoon and tonight. Strong thunderstorms may hit northwestern Fairfax County, with gusts up to 50 miles per hour.
The National Weather Service also issued a Special Weather Statement:
…SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING…
A cold front approaching the region will interact with an unstable airmass to result in showers and thunderstorms. Some of these thunderstorms may become severe, especially between 2 PM this afternoon and 9 PM this evening.
The main threats with these storms will be:
* Damaging wind gusts
* Heavy rainfall and flash flooding
* Frequent lightningTake time today to review your severe weather action plan. Have a way to receive alerts from the National Weather Service, and be ready to seek safe shelter should storms approach your neighborhood or a warning is issued.
⛈ A cold front is bringing the heat wave to an end, but not without the threat of severe thunderstorms. A Severe Thunderstorm Watch has been issued until 10 pm. Stay weather aware and be ready to move inside if a warning is issued. #VaWx pic.twitter.com/bLN448GToT
— Ready Fairfax (@ReadyFairfax) July 22, 2019
A Flash Flood Watch is in effect for most areas this afternoon through late tonight. Severe thunderstorms are possible this afternoon and evening. See map for more details. pic.twitter.com/Na8nVWgm7u
— NWS Baltimore-Washington (@NWS_BaltWash) July 22, 2019
An Excessive Heat Warning will be in effect for Fairfax County and surrounding areas for much of today (Friday).
The National Weather Service said the warning will last from 11 a.m. to 9 p.m. Heat index values could reach 110 degrees today.
Currently, Saturday and Sunday are under an Excessive Heat Watch.
More from NWS:
…EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM EDT THIS EVENING…
…EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING…
…EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING…* HEAT INDEX VALUES…Near 110 degrees today, then potentially 110 to 115 degrees Saturday and Sunday due to temperatures in the upper 90s to around 100 degrees and dewpoints in the lower to middle 70s.
* Impacts…Dangerously high temperatures and humidity could quickly cause heat stress or heat stroke if precautions are not taken.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
An Excessive Heat Warning means that a prolonged period of dangerously high temperatures will occur. The combination of extreme temperatures and high humidity will create a dangerous situation in which heat illnesses are expected. Check in on relatives and neighbors.
Fairfax County Fire and Rescue wants people to keep cool and practice heat safety whether inside or outside. The fie department also has a guide for how to identify the symptoms of heat exhaustion and heat stroke — and what to do.
In addition to the heat, an Air Quality Alert has been issued for today.
More from NWS:
A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors.
#HEAT UPDATE: Today marks day 1 of 3 excessively hot and humid days for our region. Dangerous heat indices of 100-115 are expected. Stay hydrated and in shaded or air conditioned places, and check on your friends and neighbors. Heat safety tips: https://t.co/nm6p0Dmcbs. pic.twitter.com/Jb4u0DwSPs
— NWS Baltimore-Washington (@NWS_BaltWash) July 19, 2019
Excessive Heat Watch Friday, Saturday and Sunday https://t.co/5ZMXDwfkM0
— Fairfax County Government 🇺🇸 (@fairfaxcounty) July 18, 2019
Photo by Kent Pilcher on Unsplash
The National Weather Service has a Heat Advisory in effect for Fairfax County and surrounding areas for much of today (Wednesday).
The advisory will last from 11 a.m.-8 p.m. with heat index values set to hit 110 degrees.
More from NWS:
…HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING…
* HEAT INDEX VALUES…105 to 110 due to temperatures in the mid 90s, and dewpoints in the lower 70s.
* IMPACTS…The heat and humidity may cause heat stress during outdoor exertion or extended exposure.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
A Heat Advisory means that a period of high temperatures is expected. The combination of high temperatures and high humidity will create a situation in which heat illnesses are possible.
Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible and drink plenty of water.
A Heat Advisory has been issued for counties along/east of the I-95 corridor, including DC and Baltimore. Heat index values are expected to reach 105 degrees for areas in the advisory. #DCwx #MDwx #VAwx #WVwx pic.twitter.com/unclowshfB
— NWS Baltimore-Washington (@NWS_BaltWash) July 17, 2019
Photo by Kent Pilcher on Unsplash
