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February 24-25 Severe/Wind/General obs/discussion


Ellinwood

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I've jinxed us all...

day2probotlk_20120223_1730_any_prt.gif

...EASTERN GULF STATES THRU SRN/MID ATLANTIC COAST...

LINGERING SPREAD AMONG THE MODEL DATA CONCERNING THE DETAILS OF THE

EVOLVING PATTERN...AND CONCERN ABOUT THE DEGREE OF THE POTENTIALLY

DRYING DOWNSLOPE LOW LEVEL FLOW COMPONENT...ARE CONTRIBUTING TO

CONTINUING UNCERTAINTY WITH REGARD TO THE SEVERE THUNDERSTORM

POTENTIAL FOR FRIDAY. HOWEVER...SOME GUIDANCE... PARTICULARLY THE

NAM...IS SUGGESTIVE OF CONSIDERABLY GREATER POTENTIAL THAN DEPICTED

BY THE CURRENT OUTLOOK...PARTICULARLY ACROSS PARTS OF THE CAROLINAS

INTO SOUTHEAST VIRGINIA.

THE NAM/SREF INDICATE A GOOD LIKELIHOOD THAT SUFFICIENT MOISTENING

WILL OCCUR AND BE MAINTAINED ACROSS THE PIEDMONT INTO THE COASTAL

PLAINS FOR AFTERNOON MIXED LAYER CAPE REACHING 500 J/KG. IF THIS

BECOMES THE CASE...GIVEN FAVORABLE LARGE-SCALE FORCING FOR UPWARD

VERTICAL MOTION...ONE OR MORE BROKEN LINES OF STORMS SEEM

PROBABLE...IN REGIME WHERE MODEL FORECAST SOUNDINGS INDICATE VERY

STRONG AND SHEARED LOWER/MID TROPOSPHERIC WIND FIELDS OF 50-60+ KT.

POTENTIAL COULD DEVELOP FOR...AT LEAST... FAIRLY WIDESPREAD...AND

POTENTIALLY QUITE STRONG...CONVECTIVELY ENHANCED DAMAGING WIND

GUSTS. A FEW TORNADOES MAY ALSO NOT BE OUT OF THE QUESTION.

POTENTIAL INSTABILITY TRENDS WILL HAVE TO BE CLOSELY MONITORED IN

SUBSEQUENT OUTLOOKS FOR THIS TIME PERIOD.

-----

I'll add my own analysis later this afternoon.

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Since i never follow severe Mark, is the Nam a good model for severe storms and is it like winter storms where it is only usefull within 48 hours?.

The NAM typically does better than the GFS for hitting on the major severe parameters like CAPE. However, I have noticed that in the eastern US sometimes the NAM can be a little too aggressive with the amount of directional wind shear in the lower levels. An example of this would be the NAM showing surface winds out of the south ahead of a cold front while the GFS has surface winds out of the southwest... with the southwest winds verifying.

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The NAM typically does better than the GFS for hitting on the major severe parameters like CAPE. However, I have noticed that in the eastern US sometimes the NAM can be a little too aggressive with the amount of directional wind shear in the lower levels. An example of this would be the NAM showing surface winds out of the south ahead of a cold front while the GFS has surface winds out of the southwest... with the southwest winds verifying.

Thanks for the explanation.

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Some chances for having trashcans blown away once they are dumped tomorrow.

URGENT - WEATHER MESSAGE

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

140 PM EST THU FEB 23 2012

MDZ003>005-501-502-VAZ025>031-036>040-042-501-503-504-WVZ050>053-

055-501>506-240215-

/O.NEW.KLWX.HW.A.0001.120224T1500Z-120224T2300Z/

WASHINGTON-FREDERICK MD-CARROLL-EXTREME WESTERN ALLEGANY-

CENTRAL AND EASTERN ALLEGANY-AUGUSTA-ROCKINGHAM-SHENANDOAH-

FREDERICK VA-PAGE-WARREN-CLARKE-NELSON-ALBEMARLE-GREENE-MADISON-

RAPPAHANNOCK-LOUDOUN-NORTHERN FAUQUIER-WESTERN HIGHLAND-

EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY-

WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-

WESTERN PENDLETON-EASTERN PENDLETON-

INCLUDING THE CITIES OF...HAGERSTOWN...FREDERICK...WESTMINSTER...

FROSTBURG...CUMBERLAND...STAUNTON...WAYNESBORO...HARRISONBURG...

WINCHESTER...FRONT ROYAL...CHARLOTTESVILLE...WASHINGTON...

LEESBURG...WARRENTON...HIGHTOWN...MONTEREY...MARTINSBURG...

CHARLES TOWN...MOOREFIELD...BAYARD...MOUNT STORM...PETERSBURG...

ELK GARDEN...KEYSER...FORT ASHBY...CIRCLEVILLE...FRANKLIN

140 PM EST THU FEB 23 2012

...HIGH WIND WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY

AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS

ISSUED A HIGH WIND WATCH...IN EFFECT FROM FRIDAY MORNING THROUGH

FRIDAY AFTERNOON.

* TIMING...STRONGEST WINDS WILL BE FRIDAY AFTERNOON.

* WINDS...WEST 20 TO 30 MPH WITH GUSTS UP TO 60 MPH BY LATE

AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WATCH MEANS THERE IS THE POTENTIAL FOR A HAZARDOUS

HIGH WIND EVENT. WIND GUSTS OF 58 MPH OR STRONGER MAY OCCUR.

CONTINUE TO MONITOR THE LATEST FORECASTS.

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Though I'm sure tomorrow will be memorable when some idiot on 95 throws his cigarette out the window and sets a park on fire.

Pretty much a lock that there are going to be some brush fires in the va/md/pa area tomorrow afternoon.

I remember driving to national harbor last Feb during the high wind/fire day. On the way there I could see at least 3 plumes of smoke. On the way home the fire just off of I-95 in Md had traffic royally screwed up so I went home through DC and GW parkway. A tree crashed down on the parkway about 100 yds in front of us. Was driving my suburban so I hopped the curb and navigated around the trees in the median. Cop coming the other way was just about to stop me until he saw the mess and went to check it out. It was an interesting weather day to say the least. Glad I didn't get a ticket

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I thought you weren't giving this much of a shot based on your comments in the other thread?

It probably won't be that exciting up this way... I'm considering chasing this one despite the very low tornado probs. The thing is, up until this morning the GFS and NAM were too fast for much severe, but they've caved to the timing shown on the Euro (surprise surprise).

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Ian's gonna be mad when he misses the EF-5 tomorrow.

maybe 95 east does OK.. skeptical since it's feb, plus the trough stays pretty progressive. nam gets dews up near 60 95/east tho and timing might be more optimal out there. i would not anticipate much .. carolinas look ok tho even there the torn threat is probably minimal.

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Some chances for having trashcans blown away once they are dumped tomorrow.

URGENT - WEATHER MESSAGE

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

140 PM EST THU FEB 23 2012

...HIGH WIND WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY

AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS

ISSUED A HIGH WIND WATCH...IN EFFECT FROM FRIDAY MORNING THROUGH

FRIDAY AFTERNOON.

* TIMING...STRONGEST WINDS WILL BE FRIDAY AFTERNOON.

* WINDS...WEST 20 TO 30 MPH WITH GUSTS UP TO 60 MPH BY LATE

AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WATCH MEANS THERE IS THE POTENTIAL FOR A HAZARDOUS

HIGH WIND EVENT. WIND GUSTS OF 58 MPH OR STRONGER MAY OCCUR.

CONTINUE TO MONITOR THE LATEST FORECASTS.

Sweet i already hired BB to get my cans and lids.

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Pretty much a lock that there are going to be some brush fires in the va/md/pa area tomorrow afternoon.

I remember driving to national harbor last Feb during the high wind/fire day. On the way there I could see at least 3 plumes of smoke. On the way home the fire just off of I-95 in Md had traffic royally screwed up so I went home through DC and GW parkway. A tree crashed down on the parkway about 100 yds in front of us. Was driving my suburban so I hopped the curb and navigated around the trees in the median. Cop coming the other way was just about to stop me until he saw the mess and went to check it out. It was an interesting weather day to say the least. Glad I didn't get a ticket

I will never forget that day. The power of wind and fire was impressive. There were big fires in Anne Arundel, Prince Georges, and Baltimore County. There were fire trucks responding from Harford County to calls in Anne Arundel because everyone was so busy.

Brush-Box-20-22-Box-18-9-2nd-M.jpg

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I will never forget that day. The power of wind and fire was impressive. There were big fires in Anne Arundel, Prince Georges, and Baltimore County. There were fire trucks responding from Harford County to calls in Anne Arundel because everyone was so busy.

Was that the same day the big forest fire happened in Odenton, like 5 miles from where I use to live?

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Sweet... winds and fire issues tomorrow.

-_-

I will never forget that day. The power of wind and fire was impressive. There were big fires in Anne Arundel, Prince Georges, and Baltimore County. There were fire trucks responding from Harford County to calls in Anne Arundel because everyone was so busy.

Mutual Aid FTW.

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18z nam slows it down a little more.. pretty optimal timing now if right. gets most of the area to 60+ dews and ~1,000 cape. that might be able to make things more interesting i suppose. still skeptical since it's feb..

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18z nam slows it down a little more.. pretty optimal timing now if right. gets most of the area to 60+ dews and ~1,000 cape. that might be able to make things more interesting i suppose. still skeptical since it's feb..

Places near DC are nearing 70 with partly cloudy skies today. Wouldn't surprise me if Tail End Charlie would up dropping some nice winds/hail tomorrow.

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