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2 years 9 months ago
No Mesoscale Discussions are in effect as of Sun Nov 13 17:56:01 UTC 2022.
2 years 9 months ago
SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1117 AM CST Sun Nov 13 2022
Valid 141200Z - 151200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTHEAST
TX AND MIDDLE/UPPER TX COAST ACROSS SOUTHERN LA...
...SUMMARY...
Strong thunderstorms may impact parts of the Middle into Upper Texas
and Louisiana coastal plain Monday afternoon through Monday night,
accompanied by at least some risk for severe weather.
...Middle/Upper TX Coast into Southern LA...
A southern-stream shortwave trough is forecast to begin the period
over the southern High Plains before continuing eastward across the
southern Plains during the day and then more northeastward into the
Mid MS Valley late Monday night/early Tuesday morning. Moderate to
strong mid-level flow will accompany this wave, spreading across the
southern Plains early Monday and across much of the lower/middle MS
Valley by Monday night.
Low-level moisture will attempt to return northward across TX ahead
of this shortwave, but moisture scouring resulting from a previous
frontal intrusion and largely continental trajectories will likely
keep 60s dewpoints confined to the western and central Gulf Coasts.
A surface low is expected to develop within the frontal zone in the
vicinity of the Middle TX coast by Monday afternoon. This low should
then move eastward over the immediate coastal areas of the Upper TX
Coast and southern LA.
The strongest large-scale forcing for ascent will be displaced well
north of the Gulf Coast but low-level convergence near the low and
warm front should provide enough lift for storm development. The
kinematic environment supports supercells, with strong low-level
flow beneath moderate to strong southwesterly flow aloft. Given this
kinematic support, the overall severe threat will be largely tied to
thermodynamics. As such, location of the surface low and warm front
will have a large influence on how far inland the warm sector
penetrates and where the greater severe risks exist. Currently, the
highest potential is anticipated along the near coastal areas of the
Upper TX Coast and southern LA. Isolated damaging gusts and a
tornado or two may occur in this areas. A low-probability threat for
hail also exists just north of the warm front where a few stronger
elevated storms are possible.
..Mosier.. 11/13/2022
Read more
2 years 9 months ago
SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1026 AM CST Sun Nov 13 2022
Valid 131630Z - 141200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Isolated thunderstorms are forecast into early/mid afternoon over
central and southern Florida.
...Synopsis...
A mid/upper-level trough currently over the Lower Great Lakes
vicinity will lift northeastward across New England through the
period. A related cold front extends south-southwestward off the
Eastern Seaboard into the central FL Peninsula, where it becomes
increasingly diffuse. Along/ahead of the southward-moving front,
steep midlevel lapse rates atop upper 60s/lower 70s boundary-layer
dewpoints (sampled by the 12Z TBW sounding) will continue to support
isolated thunderstorms across central into southern FL this
afternoon. However, weak/shallow frontal ascent should generally
limit convective coverage and intensity.
Farther west, a closed midlevel low evident in water vapor imagery
will dig southeastward across the southwestern states. As DCVA and
cold midlevel temperatures preceding this feature overspread
northern NM and southwestern CO, an isolated thunderstorm cannot be
ruled out. However, the coverage of this activity appears too
minimal for thunderstorm probabilities given marginal midlevel
moisture/instability across the region.
..Weinman/Thompson.. 11/13/2022
Read more
2 years 9 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0953 AM CST Sun Nov 13 2022
Valid 131700Z - 141200Z
...NO CRITICAL AREAS...
Localized elevated fire weather conditions remain probable this
afternoon from the northeast TX Panhandle into northwest OK and
west/southwest KS. Morning surface observations already show winds
increasing to 15 mph, with further strengthening to 20-25 mph
expected. The probability for widespread RH reductions below 25%
remains low, but some areas may see periods of 20-25% RH with gusty
winds. Elevated conditions are also likely for the Gila region of
southeast AZ/southwest NM. However, latest fuel analyses continue to
show ERC values near or below seasonal normals for both regions,
which will mitigate more robust fire weather concerns. See the
previous discussion below for additional details.
..Moore.. 11/13/2022
.PREV DISCUSSION... /ISSUED 1149 PM CST Sat Nov 12 2022/
...Synopsis...
An upper-level trough will move through the Four Corners today and
reach the southern High Plains by early Monday morning. This will
promote a deepening surface low in eastern Colorado. An increase in
low-level winds is expected across parts of the southern and central
Plains. Recent cooler conditions and precipitation have generally
moistened fuels in the region. Some of the stronger, gustier winds
are probable in western Kansas. This area could see locally elevated
conditions should RH fall low enough during the afternoon.
As the trough moves east, stronger northerly mid-level winds will
overspread southern California during the afternoon. At the same
time, the offshore pressure gradient will increase through Monday
morning. Some locally elevated conditions are also possible where
fuels have remained drier recently, primarily out of the higher
terrain. These areas should be quite limited spatially given the
past weeks rainfall.
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
2 years 9 months ago
No watches are valid as of Sat Nov 12 17:54:02 UTC 2022.
2 years 9 months ago
No Mesoscale Discussions are in effect as of Sat Nov 12 17:54:02 UTC 2022.
2 years 9 months ago
SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1115 AM CST Sat Nov 12 2022
Valid 131200Z - 141200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
The risk for severe thunderstorms appears negligible across the U.S.
Sunday through Sunday night.
...Synopsis...
Several shortwave troughs will be embedded within the broadly
cyclonic flow aloft across CONUS on Sunday. The lead shortwave is
expected to begin the period over the Upper OH Valley, before then
ejecting northeastward across the Upper Great Lakes and Northeast. A
pair of phased shortwaves are expected farther west. The northern
shortwave will extend from southern Saskatchewan through central MT
early Sunday, while the southern shortwave extends from the western
Great Basin through central CA. Expectation is for the northern wave
to move eastward throughout the day, moving through eastern MT and
into the northern Plains. The southern wave is expected to move more
southeastward, progressing across the Four Corners/Southwest into
the southern High Plains.
Cold mid-level temperatures will accompany the southern shortwave,
but scant low to mid-level moisture and generally cold profiles
should limit buoyancy. As a result, despite strong forcing for
ascent, thunderstorm coverage is expected to remain less than 10%.
Surface pressure will lower across the Plains ahead of this wave as
well, with increasing low-level southerly flow across the southern
Plains. Even so, low-level moisture return will be minimal due to
the previous frontal intrusion. Low-level moisture will be in place
over the FL Peninsula ahead of a weakening cold front. However,
convergence along the front will be weak and low/mid-level
temperatures will remain warm, limiting thunderstorm potential.
..Mosier.. 11/12/2022
Read more
2 years 9 months ago
SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1019 AM CST Sat Nov 12 2022
Valid 121630Z - 131200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today.
...Synopsis...
An amplified mid/upper-level trough currently centered over the
Upper/Middle MS Valley will gradually deamplify as it tracks
east-northeastward into the Lower Great Lakes vicinity through the
period. Within the broad downstream cyclonic flow aloft, water vapor
imagery reveals an embedded impulse tracking northeastward across
New England. As the associated lobe of ascent overspreads
weak/elevated instability over eastern ME (per GYX observed 12Z
sounding), isolated lightning flashes will be possible into early
afternoon.
In the low-levels, a cold front extends southwestward along the
Appalachians into the Central Gulf Coast. Ahead of the front,
isolated thunderstorms are possible over southeast LA -- where lower
60s dewpoints reside beneath modest midlevel lapse rates. However
much of this activity may remain confined to the Gulf waters.
Farther east, weakly confluent low-level flow coupled with diurnal
heating of rich low-level moisture should support a few
thunderstorms across the southern FL Peninsula this afternoon. These
storms should generally be focused along the east coast -- where a
very weak sea breeze should favor stronger convergence/mesoscale
ascent. Poor midlevel lapse rates and weak deep-layer flow/shear
(evident in the MFL 12Z observed sounding) should limit convective
intensity/organization.
..Weinman/Thompson.. 11/12/2022
Read more
2 years 9 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0938 AM CST Sat Nov 12 2022
Valid 121700Z - 131200Z
...NO CRITICAL AREAS...
Fire weather concerns remain limited for today for much of the
CONUS. Dry conditions are noted across portions of the
southern/central High Plains and the lower CO River Valley, but weak
winds are expected for these regions. See the previous discussion
below for further details.
..Moore.. 11/12/2022
.PREV DISCUSSION... /ISSUED 1143 PM CST Fri Nov 11 2022/
...Synopsis...
A brief period of shortwave ridging aloft will occur within the
Plains today. Through the day, however, southerly surface winds will
be on the increase as the next shortwave trough moves into the Great
Basin by early Sunday morning. With the strongest winds offset from
afternoon RH minima and fuels generally unperceptive, fire weather
concerns will be low.
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
2 years 9 months ago
WW 0569 Status Updates
STATUS REPORT ON WW 569
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 E ILM TO
35 NNW ILM TO 30 WSW CLT.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1944
..WEINMAN..11/11/22
ATTN...WFO...RAH...MHX...AKQ...ILM...GSP...RNK...LWX...
STATUS REPORT FOR WT 569
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC001-007-013-015-025-029-031-033-037-041-049-051-053-055-057-
061-063-065-067-069-073-077-079-081-083-085-091-093-095-101-103-
105-107-117-119-123-125-127-131-133-135-137-139-143-145-147-151-
153-157-159-163-165-167-169-177-179-181-183-185-187-191-195-
111840-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALAMANCE ANSON BEAUFORT
BERTIE CABARRUS CAMDEN
CARTERET CASWELL CHATHAM
CHOWAN CRAVEN CUMBERLAND
CURRITUCK DARE DAVIDSON
DUPLIN DURHAM EDGECOMBE
FORSYTH FRANKLIN GATES
GRANVILLE GREENE GUILFORD
HALIFAX HARNETT HERTFORD
HOKE HYDE JOHNSTON
JONES LEE LENOIR
MARTIN MECKLENBURG MONTGOMERY
MOORE NASH NORTHAMPTON
ONSLOW ORANGE PAMLICO
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2 years 9 months ago
WW 569 TORNADO NC SC VA CW 111115Z - 112000Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 569
NWS Storm Prediction Center Norman OK
615 AM EST Fri Nov 11 2022
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Central and eastern North Carolina
Northeastern South Carolina
Central and eastern Virginia
Coastal Waters
* Effective this Friday morning and afternoon from 615 AM until
300 PM EST.
* Primary threats include...
A few tornadoes likely
Isolated damaging wind gusts to 70 mph possible
SUMMARY...The tornado threat well northeast of T.D. Nicole's center
is expected to expand considerably northward/inland through
early/mid afternoon, as Nicole accelerates into the western
Carolinas, and its outer convective bands interact with a broadly
destabilizing air mass.
The tornado watch area is approximately along and 105 statute miles
either side of a line from 35 miles south southwest of Florence SC
to 45 miles east northeast of Richmond VA. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU9).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 568...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 12035.
...Edwards
Read more
2 years 9 months ago
SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1121 AM CST Fri Nov 11 2022
Valid 121200Z - 131200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected Saturday through Saturday
night.
...Synopsis/Discussion...
A semi-amplified/progressive upper-flow pattern will exist over the
CONUS on Saturday. A prominent upper trough will shift
east-northeastward over the Midwest/Great Lakes and Ontario.
Isolated thunderstorm potential, associated with a minimally
unstable environment, may linger across coastal New England Saturday
morning prior to the cold front clearing the Eastern Seaboard.
A few thunderstorms could occur along the middle Gulf Coast near the
advancing front Saturday morning, although the greater probability
and coverage of thunderstorms will be over the western/northern Gulf
of Mexico. Across Florida, the glancing cyclonic influence of the
Midwest upper trough, along with some increase in low-level
convergence and a residually moist air mass across the
central/southern Peninsula, will contribute to the potential for
widely scattered thunderstorms on Saturday.
A closed mid-level low with related -25C to -30C 500mb cold core
will spread southeastward from western Oregon toward the Great Basin
through Saturday night. Steepening lapse rates could influence some
convective precipitation into parts of the Great Basin/Nevada,
although marginal thermodynamic characteristics and a limited
potential for charge separation should keep the potential for
thunderstorms low.
..Guyer.. 11/11/2022
Read more
2 years 9 months ago
MD 1944 CONCERNING TORNADO WATCH 569... FOR NORTHEAST NC INTO SOUTHEAST VA
Mesoscale Discussion 1944
NWS Storm Prediction Center Norman OK
1106 AM CST Fri Nov 11 2022
Areas affected...Northeast NC into southeast VA
Concerning...Tornado Watch 569...
Valid 111706Z - 111900Z
The severe weather threat for Tornado Watch 569 continues.
SUMMARY...The supercell tornado threat continues across Tornado
Watch 569, with a locally higher risk across parts of northeast NC
into southeast VA during the next few hours.
DISCUSSION...Latest visible satellite imagery shows pockets of cloud
clearing/thinning amid rich boundary layer moisture (lower/middle
70s dewpoints) across parts of northeast NC into southeast VA. Here,
surface winds are favorably backed beneath deep/strong southerly
winds per RAX/AKQ VWPs. This wind profile is supporting modest
low-level hodograph curvature/streamwise vorticity, characterized by
150-200 m2/s2 0-1 km SRH per aforementioned VWPs.
RAX radar data depicts a broken band of organizing supercell
structures spreading northward into this increasingly favorable
environment, and some modest intensification of this activity will
be possible through the afternoon given increasing boundary-layer
theta-e and strengthening low-level shear. Convection has generally
been tracking northward at around 30 mph, though any
discrete/semi-discrete cells that track more north-northeastward
should pose the greatest tornado threat.
..Weinman.. 11/11/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...AKQ...MHX...RAH...
LAT...LON 36807824 37037817 37277800 37527770 37667744 37707702
37527655 37287619 36967596 36427576 36117576 35827625
35767675 35887733 36037775 36207804 36527823 36807824
Read more
2 years 9 months ago
SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1016 AM CST Fri Nov 11 2022
Valid 111630Z - 121200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
ACROSS NC/VA...AND THROUGH THIS EVENING ACROSS SOUTH TX...
...SUMMARY...
A couple of tornadoes are possible through mid-late afternoon over
parts of the Carolinas and Virginia. Large hail will be the main
severe-weather threat in south Texas this afternoon/evening.
...NC/VA through mid-late afternoon...
The remnants of Nicole will accelerate northeastward and weaken by
tonight over the Mid-Atlantic. In the interim, there will still be
the potential for broken convective bands from NC into VA through
the afternoon as some low-level destabilization occurs in cloud
breaks. Curved low-level hodographs with effective SRH at or above
200 m2/s2 will be maintained northeast of the remnant circulation
center through the afternoon, and a couple of tornadoes will be
possible with supercells in the convective bands.
...Central/south TX through this evening...
Slightly elevated strong-severe storms are ongoing across central TX
on the immediate cool side of a surface cold front. This front will
continue to move southeastward to the coastal plain by this evening,
as an associated midlevel trough progresses eastward over the
southern Plains. The threat for surface-based storms will increase
some this afternoon from roughly San Antonio to Corpus Christi, just
ahead of the front in a zone of ascent with a lead mid-upper speed
max over the Big Bend (as evidenced by the warm sector convection
over Real County as of 16z). Long/relatively straight hodographs,
midlevel lapse rates greater than 7 C/km, and MLCAPE of 1500-2000
J/kg will support the potential for a few supercells capable of
producing isolated very large hail (2 inch diameter or larger) and
damaging gusts from early afternoon until the storms move off the
middle TX coast by late evening.
..Thompson/Weinman.. 11/11/2022
Read more
2 years 9 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1012 AM CST Fri Nov 11 2022
Valid 111700Z - 121200Z
...NO CRITICAL AREAS...
Fire weather concerns will remain minimal across the CONUS in the
wake of a strong cold front across the Plains and due to widespread
precipitation across the East Coast associated with the remnants of
Hurricane Nicole. Locally dry/breezy conditions across the higher
terrain of southern California will wane through the day amid a
weakening pressure gradient.
..Moore.. 11/11/2022
.PREV DISCUSSION... /ISSUED 1143 PM CST Thu Nov 10 2022/
...Synopsis...
Strong surface high pressure will be present across much of the
western and central U.S. today. A combination of cooler temperatures
and recent/expected precipitation will keep fire weather concerns
minimal during the period.
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
2 years 9 months ago
MD 1937 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR PARTS OF NORTHERN MISSOURI INTO EASTERN IOWA AND SOUTHWEST WISCONSIN
Mesoscale Discussion 1937
NWS Storm Prediction Center Norman OK
1147 AM CST Thu Nov 10 2022
Areas affected...parts of northern Missouri into eastern Iowa and
southwest Wisconsin
Concerning...Severe potential...Watch unlikely
Valid 101747Z - 101915Z
Probability of Watch Issuance...20 percent
SUMMARY...A couple of damaging gusts and perhaps a brief tornado are
possible with storms gradually strengthening along a cold front. A
WW issuance appears unlikely given the isolated extent of the severe
threat.
DISCUSSION...A strong surface cold front continues to advance
eastward in tandem with a mid-level jet streak overspreading the
Upper MS Valley. Ahead of the cold front, small cloud breaks, and
diurnal heating is supporting surface temperatures warming into the
70s F, that combined with 60+ F surface dewpoints beneath 6.5 C/km
mid-level lapse rates (per 17Z mesoanalysis) is contributing to 500
J/kg of tall, thin MLCAPE. Coincident with this marginal buoyancy is
a unidirectional speed-shear profile, with elongated, relatively
straight hodographs shown by RAP forecast soundings. Modest, gradual
intensification of a low-topped squall line is underway along the
cold front in central IA and this trend may continue through the
afternoon. Damaging gusts are the main threat, though a brief
tornado cannot be ruled out. The severe threat should remain
isolated though, so a WW issuance is not currently expected.
..Squitieri/Hart.. 11/10/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GRB...MKX...LSX...DVN...ARX...MPX...DMX...EAX...
LAT...LON 40229393 42199297 43319240 44809136 44939060 44858987
44378934 43538922 41899029 40529139 40009166 39489204
38899268 38619328 38719383 38969412 39469425 40229393
Read more
2 years 9 months ago
WW 0566 Status Updates
STATUS FOR WATCH 0566 HAS NOT BEEN ISSUED YET
Read more
2 years 9 months ago
WW 566 TORNADO GA SC CW 101745Z - 110000Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 566
NWS Storm Prediction Center Norman OK
1245 PM EST Thu Nov 10 2022
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Southeast Georgia
Southern South Carolina
Coastal Waters
* Effective this Thursday afternoon and evening from 1245 PM
until 700 PM EST.
* Primary threats include...
A couple tornadoes possible
SUMMARY...Offshore thunderstorms will continue to track inland and
pose a risk of a few brief tornadoes this afternoon.
The tornado watch area is approximately along and 35 statute miles
either side of a line from 35 miles south of Waycross GA to 55 miles
northeast of Savannah GA. For a complete depiction of the watch see
the associated watch outline update (WOUS64 KWNS WOU6).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 565...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 12025.
...Hart
Read more
2 years 9 months ago
SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1130 AM CST Thu Nov 10 2022
Valid 111200Z - 121200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE
CAROLINAS AND VIRGINIA...
...SUMMARY...
Severe thunderstorms capable of brief tornadoes and isolated
damaging winds will be possible Friday across parts of the Carolinas
and the Mid-Atlantic States.
...Carolinas/Mid-Atlantic States...
Per latest guidance from the National Hurricane Center, a gradually
weakening Nicole should be centered over west-central/north-central
Georgia Friday morning, and subsequently continue northeastward
parallel to the Appalachians as it undergoes a post-tropical
transition through Friday afternoon and Friday night.
Even though Nicole is expected to weaken, low/mid-level winds on its
eastern periphery will remain strong including a 45-55 kt low-level
jet. Meanwhile, rich low-level moisture, characterized by at least
upper 60s surface dewpoints, is expected to spread inland ahead of
the surface low from the central Carolinas into southern portions of
the Mid-Atlantic through Friday evening. This moisture along with
the possibility of some cloud breaks in conjunction with enlarged
low-level hodographs (effective SRH of at least 200-300 m2/s2) will
support low-topped supercell potential. Current thinking is the most
supercell/tornado-favorable collocation of ingredients should
materialize across central/eastern North Carolina into southern
Virginia on Friday.
The northward extent of the tornado risk across the Mid-Atlantic
appears increasingly marginal with time Friday evening as
boundary-layer instability becomes quite weak. But, low to mid 60s
surface dewpoints could reach as far north as southern New England
as the surface wave begins to deepen again in its post-tropical
transition.
...Central into Coastal/Deep South Texas...
The region will be influenced by the southern periphery of an upper
trough/polar jet over the Plains. A southeast-moving cold front
should generally be located from the ArkLaTex southwestward toward
the Texas Big Bend Friday morning, with scattered thunderstorms
ongoing along/behind the surface reflection of the front. These
elevated post-frontal storms could produce some hail during the day,
although mid-level lapse rates will not be overly steep and elevated
buoyancy will tend to remain weak (less than 1000 J/kg MUCAPE). As
the boundary layer warms, a few surface-based storms may develop
Friday afternoon near the surface front across Deep South Texas and
the middle Texas Coast. Some of the storms may exhibit supercell
characteristics with isolated large hail and damaging wind potential
before the front clears the coast by Friday mid/late evening.
..Guyer.. 11/10/2022
Read more
2 years 9 months ago
MD 1936 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR PORTIONS OF COASTAL GEORGIA TO THE SOUTH CAROLINA BORDER
Mesoscale Discussion 1936
NWS Storm Prediction Center Norman OK
1131 AM CST Thu Nov 10 2022
Areas affected...portions of Coastal Georgia to the South Carolina
Border
Concerning...Severe potential...Watch possible
Valid 101731Z - 101900Z
Probability of Watch Issuance...40 percent
SUMMARY...An isolated tornado threat may develop along the GA
coastal area, up to the SC border this afternoon as a band of
low-topped, transient supercells continues to shift northward. A WW
issuance is being considered.
DISCUSSION...Tropical Storm Nicole continues to drift northwestward,
with a band of low-topped transient supercells persisting along the
GA/FL border. So far, these storms have produced mainly brief,
transient low-level rotation, with no tornadoes reported or TDSs
detecting on regional radars so far. Relatively more favorable,
buoyant air has struggled to advect appreciably far inland, with
northeasterly surface winds and cloud cover keeping
temperatures/dewpoints down to around 68-70 F just north of the
ongoing convective band. Visible satellite does show some clearing
around the primary northward-moving band of transient supercells,
suggesting that slightly more buoyant air may advect inland later
this afternoon. Some guidance hints at MLCAPE approaching the
500-1000 J/kg range immediately onshore in the next few hours. Given
favorably curved, elongated hodographs recently shown by regional
VADs, this buoyancy could support an isolated tornado threat along
the shoreline.
..Squitieri/Hart.. 11/10/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CHS...JAX...
LAT...LON 31298187 31988154 32288129 32518089 32588055 32498037
32188052 31728090 31528104 31318124 31298187
Read more
Checked
5 years 10 months ago
Storm Prediction Center
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