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1 year 8 months ago
Day 4-8 Outlook
Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0333 AM CST Thu Nov 30 2023
Valid 031200Z - 081200Z
...DISCUSSION...
On Sunday/D4, a large upper-level trough will move from the MS
Valley toward the East Coast, with a front pushing quickly off the
coast. A short period may exist for thunderstorms over parts of the
eastern Carolinas, GA, and FL early Sunday, but instability is not
forecast to be very strong.
From Monday/D5 through Thursday/D8, a rather amplified yet
progressive pattern is expected to persist across the eastern CONUS,
with high pressure maintaining offshore flow and preventing
destabilization for most of the period. Although predictability with
the large-scale pattern does decrease markedly after Wednesday/D7,
the overall pattern does not appear to favor severe weather through
the period.
Read more
1 year 8 months ago
Day 4-8 Outlook
Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0333 AM CST Thu Nov 30 2023
Valid 031200Z - 081200Z
...DISCUSSION...
On Sunday/D4, a large upper-level trough will move from the MS
Valley toward the East Coast, with a front pushing quickly off the
coast. A short period may exist for thunderstorms over parts of the
eastern Carolinas, GA, and FL early Sunday, but instability is not
forecast to be very strong.
From Monday/D5 through Thursday/D8, a rather amplified yet
progressive pattern is expected to persist across the eastern CONUS,
with high pressure maintaining offshore flow and preventing
destabilization for most of the period. Although predictability with
the large-scale pattern does decrease markedly after Wednesday/D7,
the overall pattern does not appear to favor severe weather through
the period.
Read more
1 year 8 months ago
SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0137 AM CST Thu Nov 30 2023
Valid 021200Z - 031200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTHERN
MISSISSIPPI ACROSS PARTS OF ALABAMA...GEORGIA...AND THE FLORIDA
PANHANDLE...
...SUMMARY...
Isolated severe storms will be possible on Saturday over parts of
the Southeast.
...Synopsis and Discussion...
An expansive area of strong southwest flow aloft will persist from
the southern Plains into much of the East, with an amplifying upper
trough over the Plains at 00Z. This wave will eject northeastward
across the OH Valley, as has been the case with the previous several
shortwaves. Minor height rises in a warm advection regime will
occur over the Southeast during the day, but will give way to falls
during the afternoon and especially overnight as the primary speed
max to the north grazes the region.
An effective boundary/surface trough will likely remain situated
from southwest to northeast from southern LA into MS, AL, and GA,
with upper 60s F dewpoints spreading north across AL and into GA.
Substantial ongoing rain and storms are forecast early on Saturday
near the boundary, and this activity should transition eastward
through the period. An area of overlapping instability and low-level
shear near a warm front could yield supercell potential, but the
actual risk will depend on mesoscale factors such as boundary
position. As such, will introduce low severe probabilities for wind
and isolated tornadoes at this time.
..Jewell.. 11/30/2023
Read more
1 year 8 months ago
SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0137 AM CST Thu Nov 30 2023
Valid 021200Z - 031200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTHERN
MISSISSIPPI ACROSS PARTS OF ALABAMA...GEORGIA...AND THE FLORIDA
PANHANDLE...
...SUMMARY...
Isolated severe storms will be possible on Saturday over parts of
the Southeast.
...Synopsis and Discussion...
An expansive area of strong southwest flow aloft will persist from
the southern Plains into much of the East, with an amplifying upper
trough over the Plains at 00Z. This wave will eject northeastward
across the OH Valley, as has been the case with the previous several
shortwaves. Minor height rises in a warm advection regime will
occur over the Southeast during the day, but will give way to falls
during the afternoon and especially overnight as the primary speed
max to the north grazes the region.
An effective boundary/surface trough will likely remain situated
from southwest to northeast from southern LA into MS, AL, and GA,
with upper 60s F dewpoints spreading north across AL and into GA.
Substantial ongoing rain and storms are forecast early on Saturday
near the boundary, and this activity should transition eastward
through the period. An area of overlapping instability and low-level
shear near a warm front could yield supercell potential, but the
actual risk will depend on mesoscale factors such as boundary
position. As such, will introduce low severe probabilities for wind
and isolated tornadoes at this time.
..Jewell.. 11/30/2023
Read more
1 year 8 months ago
SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0137 AM CST Thu Nov 30 2023
Valid 021200Z - 031200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTHERN
MISSISSIPPI ACROSS PARTS OF ALABAMA...GEORGIA...AND THE FLORIDA
PANHANDLE...
...SUMMARY...
Isolated severe storms will be possible on Saturday over parts of
the Southeast.
...Synopsis and Discussion...
An expansive area of strong southwest flow aloft will persist from
the southern Plains into much of the East, with an amplifying upper
trough over the Plains at 00Z. This wave will eject northeastward
across the OH Valley, as has been the case with the previous several
shortwaves. Minor height rises in a warm advection regime will
occur over the Southeast during the day, but will give way to falls
during the afternoon and especially overnight as the primary speed
max to the north grazes the region.
An effective boundary/surface trough will likely remain situated
from southwest to northeast from southern LA into MS, AL, and GA,
with upper 60s F dewpoints spreading north across AL and into GA.
Substantial ongoing rain and storms are forecast early on Saturday
near the boundary, and this activity should transition eastward
through the period. An area of overlapping instability and low-level
shear near a warm front could yield supercell potential, but the
actual risk will depend on mesoscale factors such as boundary
position. As such, will introduce low severe probabilities for wind
and isolated tornadoes at this time.
..Jewell.. 11/30/2023
Read more
1 year 8 months ago
SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0137 AM CST Thu Nov 30 2023
Valid 021200Z - 031200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTHERN
MISSISSIPPI ACROSS PARTS OF ALABAMA...GEORGIA...AND THE FLORIDA
PANHANDLE...
...SUMMARY...
Isolated severe storms will be possible on Saturday over parts of
the Southeast.
...Synopsis and Discussion...
An expansive area of strong southwest flow aloft will persist from
the southern Plains into much of the East, with an amplifying upper
trough over the Plains at 00Z. This wave will eject northeastward
across the OH Valley, as has been the case with the previous several
shortwaves. Minor height rises in a warm advection regime will
occur over the Southeast during the day, but will give way to falls
during the afternoon and especially overnight as the primary speed
max to the north grazes the region.
An effective boundary/surface trough will likely remain situated
from southwest to northeast from southern LA into MS, AL, and GA,
with upper 60s F dewpoints spreading north across AL and into GA.
Substantial ongoing rain and storms are forecast early on Saturday
near the boundary, and this activity should transition eastward
through the period. An area of overlapping instability and low-level
shear near a warm front could yield supercell potential, but the
actual risk will depend on mesoscale factors such as boundary
position. As such, will introduce low severe probabilities for wind
and isolated tornadoes at this time.
..Jewell.. 11/30/2023
Read more
1 year 8 months ago
SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0137 AM CST Thu Nov 30 2023
Valid 021200Z - 031200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTHERN
MISSISSIPPI ACROSS PARTS OF ALABAMA...GEORGIA...AND THE FLORIDA
PANHANDLE...
...SUMMARY...
Isolated severe storms will be possible on Saturday over parts of
the Southeast.
...Synopsis and Discussion...
An expansive area of strong southwest flow aloft will persist from
the southern Plains into much of the East, with an amplifying upper
trough over the Plains at 00Z. This wave will eject northeastward
across the OH Valley, as has been the case with the previous several
shortwaves. Minor height rises in a warm advection regime will
occur over the Southeast during the day, but will give way to falls
during the afternoon and especially overnight as the primary speed
max to the north grazes the region.
An effective boundary/surface trough will likely remain situated
from southwest to northeast from southern LA into MS, AL, and GA,
with upper 60s F dewpoints spreading north across AL and into GA.
Substantial ongoing rain and storms are forecast early on Saturday
near the boundary, and this activity should transition eastward
through the period. An area of overlapping instability and low-level
shear near a warm front could yield supercell potential, but the
actual risk will depend on mesoscale factors such as boundary
position. As such, will introduce low severe probabilities for wind
and isolated tornadoes at this time.
..Jewell.. 11/30/2023
Read more
1 year 8 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1254 AM CST Thu Nov 30 2023
Valid 011200Z - 021200Z
...NO CRITICAL AREAS...
...Synopsis...
A belt of strong west-southwesterly flow aloft will persist across
the southern Rockies, favoring continued breezy downslope flow over
the southern High Plains. Similar to Day 1/Thursday, marginal RH
(25-30 percent) should mitigate most fire-weather concerns here.
Farther west, surface high pressure will build into the Great Basin,
yielding an offshore pressure gradient over southern CA. While
breezy/gusty north-northeasterly surface winds may support locally
elevated fire-weather conditions (primarily over parts of Santa
Barbara, Ventura, and Los Angeles Counties), fairly cool surface
temperatures will limit RH reductions and the overall fire-weather
risk.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1254 AM CST Thu Nov 30 2023
Valid 011200Z - 021200Z
...NO CRITICAL AREAS...
...Synopsis...
A belt of strong west-southwesterly flow aloft will persist across
the southern Rockies, favoring continued breezy downslope flow over
the southern High Plains. Similar to Day 1/Thursday, marginal RH
(25-30 percent) should mitigate most fire-weather concerns here.
Farther west, surface high pressure will build into the Great Basin,
yielding an offshore pressure gradient over southern CA. While
breezy/gusty north-northeasterly surface winds may support locally
elevated fire-weather conditions (primarily over parts of Santa
Barbara, Ventura, and Los Angeles Counties), fairly cool surface
temperatures will limit RH reductions and the overall fire-weather
risk.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1254 AM CST Thu Nov 30 2023
Valid 011200Z - 021200Z
...NO CRITICAL AREAS...
...Synopsis...
A belt of strong west-southwesterly flow aloft will persist across
the southern Rockies, favoring continued breezy downslope flow over
the southern High Plains. Similar to Day 1/Thursday, marginal RH
(25-30 percent) should mitigate most fire-weather concerns here.
Farther west, surface high pressure will build into the Great Basin,
yielding an offshore pressure gradient over southern CA. While
breezy/gusty north-northeasterly surface winds may support locally
elevated fire-weather conditions (primarily over parts of Santa
Barbara, Ventura, and Los Angeles Counties), fairly cool surface
temperatures will limit RH reductions and the overall fire-weather
risk.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1254 AM CST Thu Nov 30 2023
Valid 011200Z - 021200Z
...NO CRITICAL AREAS...
...Synopsis...
A belt of strong west-southwesterly flow aloft will persist across
the southern Rockies, favoring continued breezy downslope flow over
the southern High Plains. Similar to Day 1/Thursday, marginal RH
(25-30 percent) should mitigate most fire-weather concerns here.
Farther west, surface high pressure will build into the Great Basin,
yielding an offshore pressure gradient over southern CA. While
breezy/gusty north-northeasterly surface winds may support locally
elevated fire-weather conditions (primarily over parts of Santa
Barbara, Ventura, and Los Angeles Counties), fairly cool surface
temperatures will limit RH reductions and the overall fire-weather
risk.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1254 AM CST Thu Nov 30 2023
Valid 011200Z - 021200Z
...NO CRITICAL AREAS...
...Synopsis...
A belt of strong west-southwesterly flow aloft will persist across
the southern Rockies, favoring continued breezy downslope flow over
the southern High Plains. Similar to Day 1/Thursday, marginal RH
(25-30 percent) should mitigate most fire-weather concerns here.
Farther west, surface high pressure will build into the Great Basin,
yielding an offshore pressure gradient over southern CA. While
breezy/gusty north-northeasterly surface winds may support locally
elevated fire-weather conditions (primarily over parts of Santa
Barbara, Ventura, and Los Angeles Counties), fairly cool surface
temperatures will limit RH reductions and the overall fire-weather
risk.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1253 AM CST Thu Nov 30 2023
Valid 301200Z - 011200Z
...NO CRITICAL AREAS...
...Synopsis...
A southern-stream midlevel trough accompanied by strong deep-layer
westerly flow will lift northeastward from the southern Rockies into
the Middle MS Valley. At the same time, an attendant surface low
will track east-northeastward from NM across north TX and OK. Along
the southern periphery of the surface low, a tight pressure gradient
and boundary-layer mixing into the strong flow aloft will yield 20+
mph sustained westerly surface winds (with higher gusts) over
portions of southeast NM, the TX Trans-Pecos, and TX South Plains.
While these winds could lead to locally elevated fire-weather
conditions, marginal RH (25-30 percent) and limited fuels should
generally mitigate the threat.
Farther east, breezy/gusty south-southwesterly surface winds are
expected from parts of the Mid-South into the Ohio Valley -- along
the western periphery of an expansive surface high off the Carolinas
coast. While 30-40 percent minimum RH should temper the fire-weather
threat, locally elevated conditions are possible owing to the breezy
winds over receptive fuels.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1253 AM CST Thu Nov 30 2023
Valid 301200Z - 011200Z
...NO CRITICAL AREAS...
...Synopsis...
A southern-stream midlevel trough accompanied by strong deep-layer
westerly flow will lift northeastward from the southern Rockies into
the Middle MS Valley. At the same time, an attendant surface low
will track east-northeastward from NM across north TX and OK. Along
the southern periphery of the surface low, a tight pressure gradient
and boundary-layer mixing into the strong flow aloft will yield 20+
mph sustained westerly surface winds (with higher gusts) over
portions of southeast NM, the TX Trans-Pecos, and TX South Plains.
While these winds could lead to locally elevated fire-weather
conditions, marginal RH (25-30 percent) and limited fuels should
generally mitigate the threat.
Farther east, breezy/gusty south-southwesterly surface winds are
expected from parts of the Mid-South into the Ohio Valley -- along
the western periphery of an expansive surface high off the Carolinas
coast. While 30-40 percent minimum RH should temper the fire-weather
threat, locally elevated conditions are possible owing to the breezy
winds over receptive fuels.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1253 AM CST Thu Nov 30 2023
Valid 301200Z - 011200Z
...NO CRITICAL AREAS...
...Synopsis...
A southern-stream midlevel trough accompanied by strong deep-layer
westerly flow will lift northeastward from the southern Rockies into
the Middle MS Valley. At the same time, an attendant surface low
will track east-northeastward from NM across north TX and OK. Along
the southern periphery of the surface low, a tight pressure gradient
and boundary-layer mixing into the strong flow aloft will yield 20+
mph sustained westerly surface winds (with higher gusts) over
portions of southeast NM, the TX Trans-Pecos, and TX South Plains.
While these winds could lead to locally elevated fire-weather
conditions, marginal RH (25-30 percent) and limited fuels should
generally mitigate the threat.
Farther east, breezy/gusty south-southwesterly surface winds are
expected from parts of the Mid-South into the Ohio Valley -- along
the western periphery of an expansive surface high off the Carolinas
coast. While 30-40 percent minimum RH should temper the fire-weather
threat, locally elevated conditions are possible owing to the breezy
winds over receptive fuels.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1253 AM CST Thu Nov 30 2023
Valid 301200Z - 011200Z
...NO CRITICAL AREAS...
...Synopsis...
A southern-stream midlevel trough accompanied by strong deep-layer
westerly flow will lift northeastward from the southern Rockies into
the Middle MS Valley. At the same time, an attendant surface low
will track east-northeastward from NM across north TX and OK. Along
the southern periphery of the surface low, a tight pressure gradient
and boundary-layer mixing into the strong flow aloft will yield 20+
mph sustained westerly surface winds (with higher gusts) over
portions of southeast NM, the TX Trans-Pecos, and TX South Plains.
While these winds could lead to locally elevated fire-weather
conditions, marginal RH (25-30 percent) and limited fuels should
generally mitigate the threat.
Farther east, breezy/gusty south-southwesterly surface winds are
expected from parts of the Mid-South into the Ohio Valley -- along
the western periphery of an expansive surface high off the Carolinas
coast. While 30-40 percent minimum RH should temper the fire-weather
threat, locally elevated conditions are possible owing to the breezy
winds over receptive fuels.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1253 AM CST Thu Nov 30 2023
Valid 301200Z - 011200Z
...NO CRITICAL AREAS...
...Synopsis...
A southern-stream midlevel trough accompanied by strong deep-layer
westerly flow will lift northeastward from the southern Rockies into
the Middle MS Valley. At the same time, an attendant surface low
will track east-northeastward from NM across north TX and OK. Along
the southern periphery of the surface low, a tight pressure gradient
and boundary-layer mixing into the strong flow aloft will yield 20+
mph sustained westerly surface winds (with higher gusts) over
portions of southeast NM, the TX Trans-Pecos, and TX South Plains.
While these winds could lead to locally elevated fire-weather
conditions, marginal RH (25-30 percent) and limited fuels should
generally mitigate the threat.
Farther east, breezy/gusty south-southwesterly surface winds are
expected from parts of the Mid-South into the Ohio Valley -- along
the western periphery of an expansive surface high off the Carolinas
coast. While 30-40 percent minimum RH should temper the fire-weather
threat, locally elevated conditions are possible owing to the breezy
winds over receptive fuels.
..Weinman.. 11/30/2023
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
1 year 8 months ago
SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1227 AM CST Thu Nov 30 2023
Valid 011200Z - 021200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
LOUISIANA...MISSISSIPPI...ALABAMA...AND FLORIDA PANHANDLE...
...SUMMARY...
Scattered storms, some severe, are possible over parts of the
central Gulf Coast states on Friday, as well as overnight.
...Synopsis and Discussion...
On Friday, a shortwave trough will move quickly from the OH Valley
into the Northeast, while a secondary, low-amplitude wave moves from
the southern High Plains toward the mid MS Valley. South of the
track of these trough, moderate southwest flow aloft will persist,
from TX into the lower MS and TN Valley, with neutral height
tendencies.
At the surface, low pressure will weaken as it moves from MO into IN
during the day, with an boundary extending southwestward across
TN/MS/LA and into the western Gulf of Mexico. The position of this
weak boundary may be correlated with ongoing convection early Friday
morning, roughly from LA into MS, with areas of outflow. Additional
storms are likely to develop ahead of the front though, in a
moistening air mass over AL as a warm front gradually lifts ahead of
the aforementioned boundary to the west.
Overall, large-scale ascent will be weak, but persistent
southwesterly flow around 850 mb and the lifting warm front will aid
destabilization via moisture advection. Scattered storms both with
the early-day activity along the western front, and with isolated
new development across the warm sector over southern MS and AL may
yield damaging gusts or perhaps a brief tornado prior to winds
veering with the passage of the initial wave.
Overnight, as the second shortwave trough approaches,
redevelopment is expected from LA into MS and AL. A southwesterly
low-level jet will strengthen, which will maintain a moist air mass
with 200 m2/s2 effective SRH. Forecast soundings toward 12Z Saturday
depict sufficient instability to support a transient supercell or
two, with brief tornado risk.
..Jewell.. 11/30/2023
Read more
1 year 8 months ago
SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1227 AM CST Thu Nov 30 2023
Valid 011200Z - 021200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
LOUISIANA...MISSISSIPPI...ALABAMA...AND FLORIDA PANHANDLE...
...SUMMARY...
Scattered storms, some severe, are possible over parts of the
central Gulf Coast states on Friday, as well as overnight.
...Synopsis and Discussion...
On Friday, a shortwave trough will move quickly from the OH Valley
into the Northeast, while a secondary, low-amplitude wave moves from
the southern High Plains toward the mid MS Valley. South of the
track of these trough, moderate southwest flow aloft will persist,
from TX into the lower MS and TN Valley, with neutral height
tendencies.
At the surface, low pressure will weaken as it moves from MO into IN
during the day, with an boundary extending southwestward across
TN/MS/LA and into the western Gulf of Mexico. The position of this
weak boundary may be correlated with ongoing convection early Friday
morning, roughly from LA into MS, with areas of outflow. Additional
storms are likely to develop ahead of the front though, in a
moistening air mass over AL as a warm front gradually lifts ahead of
the aforementioned boundary to the west.
Overall, large-scale ascent will be weak, but persistent
southwesterly flow around 850 mb and the lifting warm front will aid
destabilization via moisture advection. Scattered storms both with
the early-day activity along the western front, and with isolated
new development across the warm sector over southern MS and AL may
yield damaging gusts or perhaps a brief tornado prior to winds
veering with the passage of the initial wave.
Overnight, as the second shortwave trough approaches,
redevelopment is expected from LA into MS and AL. A southwesterly
low-level jet will strengthen, which will maintain a moist air mass
with 200 m2/s2 effective SRH. Forecast soundings toward 12Z Saturday
depict sufficient instability to support a transient supercell or
two, with brief tornado risk.
..Jewell.. 11/30/2023
Read more
1 year 8 months ago
SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1227 AM CST Thu Nov 30 2023
Valid 011200Z - 021200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
LOUISIANA...MISSISSIPPI...ALABAMA...AND FLORIDA PANHANDLE...
...SUMMARY...
Scattered storms, some severe, are possible over parts of the
central Gulf Coast states on Friday, as well as overnight.
...Synopsis and Discussion...
On Friday, a shortwave trough will move quickly from the OH Valley
into the Northeast, while a secondary, low-amplitude wave moves from
the southern High Plains toward the mid MS Valley. South of the
track of these trough, moderate southwest flow aloft will persist,
from TX into the lower MS and TN Valley, with neutral height
tendencies.
At the surface, low pressure will weaken as it moves from MO into IN
during the day, with an boundary extending southwestward across
TN/MS/LA and into the western Gulf of Mexico. The position of this
weak boundary may be correlated with ongoing convection early Friday
morning, roughly from LA into MS, with areas of outflow. Additional
storms are likely to develop ahead of the front though, in a
moistening air mass over AL as a warm front gradually lifts ahead of
the aforementioned boundary to the west.
Overall, large-scale ascent will be weak, but persistent
southwesterly flow around 850 mb and the lifting warm front will aid
destabilization via moisture advection. Scattered storms both with
the early-day activity along the western front, and with isolated
new development across the warm sector over southern MS and AL may
yield damaging gusts or perhaps a brief tornado prior to winds
veering with the passage of the initial wave.
Overnight, as the second shortwave trough approaches,
redevelopment is expected from LA into MS and AL. A southwesterly
low-level jet will strengthen, which will maintain a moist air mass
with 200 m2/s2 effective SRH. Forecast soundings toward 12Z Saturday
depict sufficient instability to support a transient supercell or
two, with brief tornado risk.
..Jewell.. 11/30/2023
Read more
Checked
5 years 10 months ago
Storm Prediction Center
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