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2024 Severe Weather General Discussion

Kmlwx

By Kmlwx,
in Mid Atlantic

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MN Transplant
MN Transplant
biodhokie
biodhokie

some juicy mammatus ahead of the Germantown cell currently warned

WxWatcher007
WxWatcher007

@Kmlwx The timeless scale. Each person has to be on board for the step to be activated.   

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yoda

yoda

Posted
Posted
4 minutes ago, NorthArlington101 said:


Severe Thunderstorm Watch just issued as well.

  

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 109
   NWS Storm Prediction Center Norman OK
   150 PM EDT Mon Apr 15 2024

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     District Of Columbia
     Southern Delaware
     Central and Eastern Maryland
     Virginia
     Central and Eastern West Virginia
     Coastal Waters

   * Effective this Monday afternoon and evening from 150 PM until
     1000 PM EDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph likely
     Scattered large hail and isolated very large hail events to 2
       inches in diameter possible

   SUMMARY...Broken bands of strong to severe thunderstorms are
   forecast to develop this afternoon and move east-southeast through
   the mid evening.  Scattered severe gusts capable of wind damage will
   be possible with the stronger cores and outflow winds.  Large hail
   may accompany the early cellular storm activity.

   The severe thunderstorm watch area is approximately along and 90
   statute miles north and south of a line from 20 miles west northwest
   of Beckley WV to 30 miles east southeast of Wallops VA. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU9).
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SnowenOutThere

SnowenOutThere

Posted
Posted
2 minutes ago, Eskimo Joe said:

Looks like there maybe a subtle northwest moving boundary on LWX radar. Check out the 0.5° base velocity. If that can juice up those cells coming off WV then we might see some decent hailers coming into the NW suburbs. 

Appears to be the most prominent directly west and north of the radar station. Will see if that can help get some more convection for them right as they move into the more populated areas.

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yoda

yoda

Posted
Posted 
Preliminary Local Storm Report
National Weather Service Baltimore MD/Washington DC
210 PM EDT Mon Apr 15 2024

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

0159 PM     Hail             3 S Lucketts            39.18N  77.54W
04/15/2024  M1.00 inch       Loudoun            VA   Trained Spotter


&&

Event Number LWX2403036
 
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yoda

yoda

Posted
Posted 
Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
224 PM EDT Mon Apr 15 2024

MDC031-151845-
/O.CON.KLWX.SV.W.0014.000000T0000Z-240415T1845Z/
Montgomery MD-
224 PM EDT Mon Apr 15 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR CENTRAL MONTGOMERY COUNTY...

At 224 PM EDT, a severe thunderstorm was located over Gaithersburg,
moving east at 35 mph.

HAZARD...Ping pong ball size hail and 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...
Germantown, Rockville, Bethesda, Gaithersburg, Olney, Aspen Hill,
Potomac, North Bethesda, Montgomery Village, North Potomac, Redland,
Chevy Chase, North Kensington, South Kensington, Rossmoor,
Wheaton-Glenmont, Wheaton, Cloverly, Glenmont, and Darnestown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3915 7702 3900 7708 3912 7735 3917 7732
TIME...MOT...LOC 1824Z 289DEG 30KT 3913 7726

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
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yoda

yoda

Posted
Posted 
Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
242 PM EDT Mon Apr 15 2024

VAC059-107-151900-
/O.CON.KLWX.SV.W.0015.000000T0000Z-240415T1900Z/
Loudoun VA-Fairfax VA-
242 PM EDT Mon Apr 15 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTHEASTERN LOUDOUN AND NORTHWESTERN FAIRFAX COUNTIES...

At 242 PM EDT, a severe thunderstorm was located over Brambleton,
moving east at 35 mph.

HAZARD...Golf ball size hail reprted by a trained spotter in Hanson
         Park.

SOURCE...Trained weather spotters.

IMPACT...Hail is large enough to dent and damage vehicles. Some
         damage to roofs, siding, and windows is possible.

Locations impacted include...
Reston, Herndon, Fairfax, Broadlands, Brambleton, Dulles
International Airport, Ashburn, Oakton, Sterling, Wolf Trap, Great
Falls, and Arcola.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3898 7726 3886 7731 3887 7733 3897 7758
      3902 7756
TIME...MOT...LOC 1842Z 287DEG 29KT 3897 7750

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
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yoda

yoda

Posted
Posted

Coming for @MN Transplant 

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
259 PM EDT Mon Apr 15 2024

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  The southwestern District of Columbia...
  Arlington County in northern Virginia...
  The City of Falls Church in northern Virginia...
  Northeastern Fairfax County in northern Virginia...
  The City of Alexandria in northern Virginia...

* Until 345 PM EDT.

* At 258 PM EDT, a severe thunderstorm was located over Reston,
  moving east at 30 mph.

  HAZARD...Quarter size hail.

  SOURCE...Trained weather spotters.

  IMPACT...Some hail damage to agriculture is expected.

* Locations impacted include...
  Arlington, Alexandria, Reston, Annandale, Vienna, Falls Church,
  Pimmit Hills, Reagan National Airport, Mclean, Rosslyn, Crystal
  City, Howard University, Oakton, Lincolnia, Tysons Corner, Wolf
  Trap, Merrifield, Lake Barcroft, American University, and I66 and
  I495 Interchange.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.
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MN Transplant

MN Transplant

Posted
Posted
1 minute ago, yoda said:

Coming for @MN Transplant 

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
259 PM EDT Mon Apr 15 2024

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  The southwestern District of Columbia...
  Arlington County in northern Virginia...
  The City of Falls Church in northern Virginia...
  Northeastern Fairfax County in northern Virginia...
  The City of Alexandria in northern Virginia...

* Until 345 PM EDT.

* At 258 PM EDT, a severe thunderstorm was located over Reston,
  moving east at 30 mph.

  HAZARD...Quarter size hail.

  SOURCE...Trained weather spotters.

  IMPACT...Some hail damage to agriculture is expected.

* Locations impacted include...
  Arlington, Alexandria, Reston, Annandale, Vienna, Falls Church,
  Pimmit Hills, Reagan National Airport, Mclean, Rosslyn, Crystal
  City, Howard University, Oakton, Lincolnia, Tysons Corner, Wolf
  Trap, Merrifield, Lake Barcroft, American University, and I66 and
  I495 Interchange.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

You aren’t kidding.

IMG_5127.thumb.jpeg.2d39e6d3088247be11ea1ae4c656c6f0.jpeg

 

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yoda

yoda

Posted
Posted 
Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
229 PM EDT Mon Apr 15 2024

.SYNOPSIS...

A cold front will drop southward through the area tonight,
before returning northward as a warm front on Wednesday. A
strong cold front will move through this weekend, with high
pressure building in early next week.

&&

.NEAR TERM /THROUGH TONIGHT/...

Severe Thunderstorrm Watch #109 is valid until 10 PM since it
covers most of VA to the NC border, although storms are likely
to exit our forecast around 7 PM. Very steep mid-level lapse
rates of around 8C/km due to 500 mb temps of around -20C were
observed on earlier upper air data and more recent MetOp-C
NUCAPS data. This will contribute to a very favorable
environment for large hail perhaps approaching significant hail
up to 2 inches in diameter. Storms will be fast movers moving
around 35 knots and given large dewpoint depressions and strond
mid-level flow may be also capable of producing strong to
damaging winds. Storms should exit our CWA by 8 PM, likely a
little sooner than that.

Rapidly clearing skies are expected later this evening behind
exiting cold front. High pressure builds over the area overnight
into Tue morning with quiet conditions overnight through Tue
morning.
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