Severe Thunderstorms Possible Sunday

weather.gov
National Weather Service

Watches, Warnings & Advisories
Local weather forecast by "City, St" or zip code
One product issued by NWS for: Waldorf MD
--------------------------------------------------------------------------------


Hazardous Weather Outlook
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
355 PM EDT SAT MAY 17 2008

ANZ530>537-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
181000-
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-
DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-
CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
355 PM EDT SAT MAY 17 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE
CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN
CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF
COLUMBIA.

.DAY ONE...LATE THIS AFTERNOON AND TONIGHT

A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE TIDAL POTOMAC RIVER
AND MARYLAND CHESAPEAKE BAY.


.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A SMALL CRAFT ADVISORY IS IN EFFECT FOR SUNDAY AND LATE SUNDAY
NIGHT. SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED ON MONDAY AND
POSSIBLY ON THURSDAY.

A COLD FRONT WILL BRING SCATTERED THUNDERSTORMS SUNDAY AFTERNOON
AND EARLY SUNDAY EVENING. A FEW STORMS COULD REACH SEVERE LIMITS...
POTENTIALLY PRODUCING DAMAGING WINDS.

THE COMBINATION OF NEAR FULL MOON AND HIGH ASTRONOMICAL TIDES COULD
CAUSE MINOR COASTAL FLOODING ALONG IMMEDIATE AREAS OF THE POTOMAC
RIVER AND ALONG THE WESTERN SHORE OF THE CHESAPEAKE BAY AT TIMES OF
HIGH TIDE SUNDAY EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.

$$


--------------------------------------------------------------------------------

Day 1 Convective Outlook Resent 1
Nws Storm Prediction Center Norman Ok
0753 Am Cdt Sun May 18 2008

Valid 181300z - 191200z

...there Is A Slgt Risk Of Svr Tstms Across Parts Of The Mid
Atlantic Region...

...there Is A Slgt Risk Of Svr Tstms Over A Small Portion Of The Tn
Valley...

...synopsis...

A Strong Polar Vortex Encompasses Much Of Srn Ontario/quebec And The
Great Lakes Region This Morning With Several Short Wave Troughs
Embedded Within The Larger-scale Cyclonic Circulation. Primary Short
Wave Trough Of Interest For Today Was Digging Toward The Oh Valley
Within 70-75 Kt Mid Level Flow. This Feature Will Produce Modest
Height Falls And A Strong Frontal Passage Across The Appalachians
And Mid Atlantic Region Through This Evening.

As The Cold Front Advances On The Ern Seaboard...the Large Upper
Ridge That Has Dominated The West Will Be Tempered Somewhat Across
The Nrn Rockies As A Fast-moving Low Amplitude Disturbance Tracks
From British Columbia To The Nrn Plains. Dpva With The Upper Wave
Will Induce Weak Cyclogenesis Along The Lee/thermal-trough Across
Nern Mt Later Today. This Low Will Develop Sewd Across The Mo River
Valley Through Early Monday. Isolated High-based Tstm Development Is
Also Possible Across Parts Of Id...wrn Mt...and Wy As The Ridge
Breaks Down In These Areas Today.

...oh Valley To The Mid Atlantic...

Strong Impulse And Associated Mid Level Jet Now Digging Sewd
Across The Midwest Will Spread Quickly Ewd Through This Afternoon.
Frontal Wave In Response To This Feature Will Track From Oh This
Morning To Srn Pa/nrn Va This Afternoon As Associated Cold Front
Trails From The Low Swwd Across The Appalachians To The Tn Valley
With Time.

Moisture Transport Is Maximized This Morning In The Warm Conveyor
Belt Ahead Of The Low And Front...generally West Of The Appalachians
To The Oh Valley. Air Mass To The East Of The Appalachian Crest Is
Likely To Become Only Marginally Unstable Ahead Of The Low And Front
Today Given Limited Low Level Moisture /dewpts In The 50s/.
However...surface Heating And Strengthening Ascent/moistening Across
This Area Will Likely Support Pockets Of Mucape Around 500 J Per
Kg...especially From Nrn Nc To Sern Pa.

Given Rapid Ewd Translation Of The Short Wave...surface Low...and
Front...the Chance For Low-topped Tstms Should Increase Quickly
through The Early Afternoon From Pa Swwd Across Va. The Possibility
For Severe Storms Will Also Increase As Greater Instability Is
Realized And Activity Is Focused/sustained Near The Low And Along
The Trailing Front. Mean Wly Deep-layer Flow Of 45-50kt And
Unidirectional Shear Will Accompany The System Across The Region And
Contribute To A Few Bands/lines Of Organized Storms...and Perhaps A
Supercell Or Two...through The Afternoon. While Damaging Wind
Potential May Become The Main Threat From This Activity...colder
Temperatures Aloft And The Potential For A Couple/few Rotating
Storms Also Suggests The Chance For Severe Hail.

A Secondary Cold Frontal Surge May Contribute To Additional
Low-topped Tstms This Afternoon Over Portions Of Oh Into
Wrn Pa/ny. Some Hail And Strong Wind Gusts Will Accompany The More
Intense Storms Given The Cool Thermodynamic Environment And Strong
Unidirectional Wind Fields And Forcing.

...appalachians Swwd To Tn Valley...

Broad Srn Stream Trough Now Crossing The Lwr Ms Valley Will
Eventually Be Absorbed Within The Amplifying Large Scale Trough
Across The Ern U.s. Into Monday. Prior To This Happening...lift With
This Disturbance May Enhance Tstm Development Well Ahead Of And
Along The Frontal System Moving Across The Appalachians And Then
Settling Over The Tn Valley Later Today Through Tonight.

Cloud Shield With The Srn Impulse Was Currently Spreading Enewd
Across The Tn Valley And May Inhibit Greater Heating And
Destabilization From Ern Tn To Wrn Nc. However...low Level Theta-e
Ridging...and The Potential For Differential Heating Across The
Cloud Shield...could Result In An Axis Of Greater Destabilization
And More Robust Tstm Development From Al To Nrn Ga/sern Tn This
Afternoon.

Strengthening Large Scale Ascent And Modest Unidirectional
Deep-layer Flow Across These Areas...coincident With Peak In Diurnal
Tstm Potential...could Result In A Few Severe Hail/wind Events.

..carbin/crosbie/evans.. 05/18/2008

Click To Get Wuus01 Ptsdy1 Product

Note: The Next Day 1 Outlook Is Scheduled By 1630z
Current Utc Time: 1456z (10:56am), Reload This Page To Update The Time

weather.gov
National Weather Service

Watches, Warnings & Advisories
Local weather forecast by "City, St" or zip code
One product issued by NWS for: Waldorf MD
--------------------------------------------------------------------------------


Hazardous Weather Outlook
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1023 AM EDT SUN MAY 18 2008

ANZ530>537-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
191000-
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-
DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-
CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
1023 AM EDT SUN MAY 18 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE
CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN
CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF
COLUMBIA.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL MOVE EAST OF THE BLUE RIDGE AFTER
NOON...AND IMPACT THE OUTLOOK AREA DURING THE AFTERNOON. A FEW
THUNDERSTORMS MAY BECOME SEVERE...AND WILL HAVE THE POTENTIAL TO
PRODUCE DAMAGING WINDS. THE MOST LIKELY TIME FOR SEVERE WEATHER
WILL BE FROM 1 PM TO 5 PM.

A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE TIDAL POTOMAC RIVER
AND MARYLAND CHESAPEAKE BAY THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A SMALL CRAFT ADVISORY REMAINS IN EFFECT ACROSS THE MARINE WATERS
FOR MONDAY AND MONDAY EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON.

$$


--------------------------------------------------------------------------------

[BlueBird]

Noaa.org

Nearshore Marine Forecast
National Weather Service Gaylord Mi
1058 Am Edt Sun May 18 2008

For Waters Within Five Nautical Miles Of Shore On Lakes Huron...
Michigan And Superior

Lhz345-182100-
/o.con.kapx.sc.y.0053.000000t0000z-080519t0300z/
Straits Of Mackinac Within 5nm Of Mackinac Bridge Including
Mackinac Island-
1058 Am Edt Sun May 18 2008

...small Craft Advisory Remains In Effect Through This Evening...

.rest Of Today...northwest Wind 10 To 20 Knots With Higher Gusts.
Scattered Showers. Waves 2 To 4 Feet.
.tonight...northwest Wind 5 To 10 Knots. Mostly Cloudy. Waves
2 To 4 Feet.
.monday...west Wind 10 To 15 Knots. Partly Sunny. Waves 1 To
2 Feet.
.monday Night...west Wind 5 Knots Until Midnight Becoming
Variable 10 Knots Or Less. Partly Cloudy. Waves 1 To 2 Feet.

See The Open Lakes Forecast For Days 3 Through 5.

$$


--------------------------------------------------------------------------------

Nearshore Marine Forecast
National Weather Service Gaylord Mi
1058 Am Edt Sun May 18 2008

For Waters Within Five Nautical Miles Of Shore On Lakes Huron...
Michigan And Superior

Lhz346-182100-
/o.con.kapx.sc.y.0053.000000t0000z-080519t0300z/
St Ignace To False Detour Channel-
1058 Am Edt Sun May 18 2008

...small Craft Advisory Remains In Effect Through This Evening...

.rest Of Today...northwest Wind 10 To 20 Knots With Higher Gusts.
Scattered Showers. Waves 1 To 2 Feet.
.tonight...northwest Wind 10 To 15 Knots And Gusty. Mostly
Cloudy. Waves 2 To 4 Feet.
.monday...northwest Wind 10 To 15 Knots With Higher Gusts. Partly
Sunny. Waves 1 To 2 Feet.
.monday Night...west Wind 5 To 10 Knots. Gusts Up To 20 Knots.
Partly Cloudy. Waves 1 Foot Or Less.

See The Open Lakes Forecast For Days 3 Through 5.

$$


--------------------------------------------------------------------------------

Nearshore Marine Forecast
National Weather Service Gaylord Mi
1058 Am Edt Sun May 18 2008

For Waters Within Five Nautical Miles Of Shore On Lakes Huron...
Michigan And Superior

Lmz323-182100-
/o.con.kapx.sc.y.0053.000000t0000z-080519t0300z/
Grand Traverse Bay South Of A Line Grand Traverse Light To
Norwood Mi-
1058 Am Edt Sun May 18 2008

...small Craft Advisory Remains In Effect Through This Evening...

.rest Of Today...northwest Wind 10 To 20 Knots With Higher Gusts.
Scattered Showers. Waves 3 To 5 Feet.
.tonight...northwest Wind 5 To 10 Knots. Gusts Up To 20 Knots.
Mostly Cloudy. Waves 3 To 5 Feet Subsiding To 2 To 4 Feet After
Midnight.
.monday...northwest Wind 5 To 10 Knots. Gusts Up To 20 Knots
Until Midday. Partly Sunny. Waves 1 To 2 Feet.
.monday Night...west Wind 5 Knots Until Midnight Becoming
Variable 10 Knots Or Less...then Becoming West 5 Knots Early In
The Morning. Chance Of Showers. Waves 1 To 2 Feet.

See The Open Lakes Forecast For Days 3 Through 5.

$$

[LesterGreen]

Originally Posted by FireBuff40

weather.gov
National Weather Service

Watches, Warnings & Advisories
Local weather forecast by "City, St" or zip code
One product issued by NWS for: Waldorf MD
--------------------------------------------------------------------------------


Hazardous Weather Outlook
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
355 PM EDT SAT MAY 17 2008

ANZ530>537-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
181000-
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-
DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-
CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
355 PM EDT SAT MAY 17 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE
CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN
CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF
COLUMBIA.

.DAY ONE...LATE THIS AFTERNOON AND TONIGHT

A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE TIDAL POTOMAC RIVER
AND MARYLAND CHESAPEAKE BAY.


.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A SMALL CRAFT ADVISORY IS IN EFFECT FOR SUNDAY AND LATE SUNDAY
NIGHT. SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED ON MONDAY AND
POSSIBLY ON THURSDAY.

A COLD FRONT WILL BRING SCATTERED THUNDERSTORMS SUNDAY AFTERNOON
AND EARLY SUNDAY EVENING. A FEW STORMS COULD REACH SEVERE LIMITS...
POTENTIALLY PRODUCING DAMAGING WINDS.

THE COMBINATION OF NEAR FULL MOON AND HIGH ASTRONOMICAL TIDES COULD
CAUSE MINOR COASTAL FLOODING ALONG IMMEDIATE AREAS OF THE POTOMAC
RIVER AND ALONG THE WESTERN SHORE OF THE CHESAPEAKE BAY AT TIMES OF
HIGH TIDE SUNDAY EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.

$$


--------------------------------------------------------------------------------

000
ASUS44 KBMX 181510
RWRAL

ALABAMA REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1000 AM CDT SUN MAY 18 2008

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET
WITH NO SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

THE REMARK "TC" DENOTES TEMPERATURE IN DEGREES CELSIUS.

ALZ001>011-014-016>018-020-181600-
NORTH ALABAMA

CITY SKY/WX TMP DP RH WIND PRES REMARKS
MUSCLE SHOALS CLOUDY 67 56 67 W16G23 29.73F
HUNTSVILLE CLOUDY 66 56 70 SW10 29.73S
DECATUR CLOUDY 67 56 67 SW13 29.74S
HALEYVILLE FAIR 63 55 75 SW12 29.79S
GADSDEN PTSUNNY 70 55 60 SW12G17 29.78S
$$

ALZ012-013-022-023-030>036-040>044-181600-
WEST CENTRAL ALABAMA

CITY SKY/WX TMP DP RH WIND PRES REMARKS
TUSCALOOSA MOSUNNY 72 55 55 SW7 29.81F
$$

ALZ015-024>027-033>036-040>044-181600-
CENTRAL ALABAMA

CITY SKY/WX TMP DP RH WIND PRES REMARKS
BIRMINGHAM PTSUNNY 70 52 52 SW14 29.82S
MONTGOMERY SUNNY 74 55 51 W9 29.82F
SHELBY CO ARPT SUNNY 70 52 52 SW9 29.81S
MAXWELL AFB SUNNY 73 57 56 W8 29.81F
$$

ALZ019-021-028-029-037-038-045>048-181600-
EAST CENTRAL ALABAMA

CITY SKY/WX TMP DP RH WIND PRES REMARKS
ANNISTON MOSUNNY 71 52 50 W16 29.79S
ALEXANDER CITY SUNNY 73 55 53 W12G18 29.81S
AUBURN MOSUNNY 72 54 53 W9G16 29.81F
$$

ALZ051>064-181600-
SOUTHWEST ALABAMA

CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOBILE SUNNY 73 57 57 W9 29.87S
BROOKLEY FIELD MOSUNNY 76 58 53 W9 29.86F
EVERGREEN CLOUDY 73 59 61 SW7 29.85F
$$

ALZ049-050-065>069-181600-
SOUTHEAST ALABAMA

CITY SKY/WX TMP DP RH WIND PRES REMARKS
DOTHAN SUNNY 77 56 48 W10 29.86F
OZARK SUNNY 76 59 55 SW10 29.83F

[wineo]

Can you explain this in English? Will St. Mary's be getting any thunderstorms in the lower half of the county

TY

[Gemmi]

Originally Posted by wineo

Can you explain this in English? Will St. Mary's be getting any thunderstorms in the lower half of the county

TY

Yes. I would like to know also. Supposed to go to a b-day party at 4 which is going to be outside.

[LesterGreen]

Originally Posted by Gemmi

Yes. I would like to know also. Supposed to go to a b-day party at 4 which is going to be outside.

don't go

[Gemmi]

Originally Posted by LesterGreen

don't go