SPC MD 2277

1 year 8 months ago
MD 2277 CONCERNING TORNADO WATCH 711... FOR PORTIONS OF CENTRAL AND EASTERN LOUISIANA
Mesoscale Discussion 2277 NWS Storm Prediction Center Norman OK 0523 PM CST Mon Nov 20 2023 Areas affected...portions of central and eastern Louisiana Concerning...Tornado Watch 711... Valid 202323Z - 210100Z The severe weather threat for Tornado Watch 711 continues. SUMMARY...Ongoing severe storms will continue to pose a risk for a few tornadoes across WW711 this evening. DISCUSSION...Across parts of central LA, a band of convection has shown slow maturation with a couple of supercells becoming established from the broader convection over the last couple of hour. Ongoing within a moist, and unstable environment, conditions look favorable for these storms to maintain intensity this evening. Strong mid and upper-level shear will continue to favor organized storms including supercells and short line segments. While surface winds have veered slightly this afternoon, low-level hodographs remain long and supportive of strong low-level mesocyclones. Low-level shear should increase to the east beneath a southwesterly low-level jet. As storms mature they should remain capable of a few tornadoes and damaging gusts across central and eastern LA this evening. ..Lyons.. 11/20/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...JAN...LIX...LCH...SHV... LAT...LON 30269317 30289358 30389379 30809361 31389301 31829247 32069165 31999149 31689140 30769158 30599187 30309274 30269317 Read more

SPC Tornado Watch 711 Status Reports

1 year 8 months ago
WW 0711 Status Updates
STATUS REPORT ON WW 711 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 NNE BPT TO 15 N POE TO 25 NNW HEZ. ..SQUITIERI..11/20/23 ATTN...WFO...JAN...SHV...LCH...HGX... STATUS REPORT FOR WT 711 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS LAC001-003-009-011-019-025-029-035-039-053-059-065-079-097-107- 210040- LA . LOUISIANA PARISHES INCLUDED ARE ACADIA ALLEN AVOYELLES BEAUREGARD CALCASIEU CATAHOULA CONCORDIA EAST CARROLL EVANGELINE JEFFERSON DAVIS LA SALLE MADISON RAPIDES ST. LANDRY TENSAS THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

SPC Tornado Watch 711

1 year 8 months ago
WW 711 TORNADO AR LA TX 201845Z - 210100Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 711 NWS Storm Prediction Center Norman OK 1245 PM CST Mon Nov 20 2023 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Southern Arkansas Louisiana East Texas * Effective this Monday afternoon and evening from 1245 PM until 700 PM CST. * Primary threats include... A few tornadoes likely with a couple intense tornadoes possible Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Thunderstorms will continue to intensify this afternoon and evening, while posing a threat for large hail, damaging winds, and tornadoes. There is also a threat for strong tornadoes through this evening with any supercells that can be sustained. The tornado watch area is approximately along and 85 statute miles north and south of a line from 40 miles west of Lufkin TX to 40 miles southeast of Monroe LA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). 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. && AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 350. Mean storm motion vector 25035. ...Gleason Read more

SPC Tornado Watch 711 Status Reports

1 year 8 months ago
WW 0711 Status Updates
STATUS REPORT ON WW 711 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NW BPT TO 40 W POE TO 10 ENE IER TO 35 ESE MLU. ..SQUITIERI..11/20/23 ATTN...WFO...JAN...SHV...LCH...HGX... STATUS REPORT FOR WT 711 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS LAC001-003-009-011-019-021-025-029-035-039-041-043-049-053-059- 065-067-069-073-079-083-097-107-115-123-127-202340- LA . LOUISIANA PARISHES INCLUDED ARE ACADIA ALLEN AVOYELLES BEAUREGARD CALCASIEU CALDWELL CATAHOULA CONCORDIA EAST CARROLL EVANGELINE FRANKLIN GRANT JACKSON JEFFERSON DAVIS LA SALLE MADISON MOREHOUSE NATCHITOCHES OUACHITA RAPIDES RICHLAND ST. LANDRY TENSAS VERNON WEST CARROLL WINN TXC351-361-202340- TX . TEXAS COUNTIES INCLUDED ARE NEWTON ORANGE Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook

1 year 8 months ago
SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0341 PM CST Mon Nov 20 2023 Valid 221200Z - 281200Z Shortwave ridging across the central U.S. will give way to a trough digging into the Southwest towards the end of this week. Thereafter, model guidance suggests broad troughing will develop across much of the CONUS into next weekend. Differences in the upper-level pattern grow large beginning next week. At the surface, a cold front will move into the northern/central Plains late this week. A secondary push of cold air is expected to shove the front farther south by early next week. High pressure will again become more prominent in the West this weekend. ...Southern High Plains... Some dry and windy conditions are possible this Thursday as a weak surface low develops as the synoptic trough advances eastward. With temperatures being cooler due to the earlier passage of a cold front, RH values appear marginally low and winds may not be overly strong. Coupled with fuels generally being unreceptive, fire weather concerns are not likely to be more than locally elevated. ...Southern California... Offshore flow is expected to return to the region this coming weekend into Monday. Pressure gradient forecasts suggest potential for near-critical meteorological conditions. Upper-level wind support appears weak to modest. With dry conditions expected in the interim, it is possible that some fire weather concerns could develop. Fuel moisture trends will continue to be monitored. Confidence in critical fire weather remains too low for highlights this far in advance. ..Wendt.. 11/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Tornado Watch 711 Status Reports

1 year 8 months ago
WW 0711 Status Updates
STATUS REPORT ON WW 711 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 WNW BPT TO 25 NNW IER TO 40 SW GLH. ..SQUITIERI..11/20/23 ATTN...WFO...JAN...SHV...LCH...HGX... STATUS REPORT FOR WT 711 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ARC017-202240- AR . ARKANSAS COUNTIES INCLUDED ARE CHICOT LAC001-003-009-011-019-021-025-029-035-039-041-043-049-053-059- 065-067-069-073-079-083-085-097-107-115-123-127-202240- LA . LOUISIANA PARISHES INCLUDED ARE ACADIA ALLEN AVOYELLES BEAUREGARD CALCASIEU CALDWELL CATAHOULA CONCORDIA EAST CARROLL EVANGELINE FRANKLIN GRANT JACKSON JEFFERSON DAVIS LA SALLE MADISON MOREHOUSE NATCHITOCHES OUACHITA RAPIDES RICHLAND SABINE ST. LANDRY TENSAS VERNON WEST CARROLL WINN Read more

SPC MD 2276

1 year 8 months ago
MD 2276 CONCERNING SEVERE POTENTIAL...WATCH LIKELY FOR CENTRAL/SOUTHWEST MS...SOUTHEAST LA
Mesoscale Discussion 2276 NWS Storm Prediction Center Norman OK 0314 PM CST Mon Nov 20 2023 Areas affected...Central/Southwest MS...Southeast LA Concerning...Severe potential...Watch likely Valid 202114Z - 202315Z Probability of Watch Issuance...80 percent SUMMARY...Threat for severe thunderstorms capable of all severe hazards, including tornadoes, will continue eastward into central and southeast Mississippi and southeast Louisiana later this afternoon and evening. DISCUSSION...Thunderstorms, including several supercells, continue to evolve eastward over southeast TX and LA, ahead of an approaching upper-level trough and associated cold front. Modest destabilization has occurred within the downstream air mass from west-central MS into southeast LA. This region is displaced north and east of the better low-level moisture over southwest LA, but a large area of mid to upper 60s dewpoints exists across south-central and southeast LA. This should continue to advect northeastward ahead of the approaching upper trough, contributing to further destabilization over the next few hours. Low-level flow is also expected to increase ahead of this upper trough, with the resulting combination of buoyancy and shear contributing to a continued threat for severe thunderstorms this evening. Given the strong shear, primary severe risk is tornadoes, a few of which could be strong, with some threat for damaging gusts and/or isolated hail as well. A watch will likely be needed within the next hour or two to address this severe potential. ..Mosier/Gleason.. 11/20/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MOB...JAN...LIX... LAT...LON 31989122 32789080 32969009 32868950 32648917 32308896 32018889 31728901 31068930 30578977 30379056 30429140 30809168 31989122 Read more

SPC MD 2275

1 year 8 months ago
MD 2275 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR SOUTHEAST OKLAHOMA AND FAR NORTHEAST TEXAS.
Mesoscale Discussion 2275 NWS Storm Prediction Center Norman OK 0258 PM CST Mon Nov 20 2023 Areas affected...southeast Oklahoma and far northeast Texas. Concerning...Severe potential...Watch unlikely Valid 202058Z - 202200Z Probability of Watch Issuance...5 percent SUMMARY...Isolated large hail possible this afternoon across southeast Oklahoma and far northeast Texas. DISCUSSION...A pocket of destabilization has occurred near a surface low in southeast Oklahoma where temperatures have warmed into the upper 70s with dewpoints in the mid to upper 50s. Low-level convergence associated with this surface low, combined with cool temperatures aloft and and the aforementioned instability has provided an environment favorable for scattered storm development this afternoon. Very strong mid-upper level flow is supporting rotating updrafts. Therefore, a few of these cells may be capable of isolated large hail for the next few hours. This threat will persist for a few hours and wane after sunset with the loss of daytime heating. ..Bentley/Gleason.. 11/20/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LZK...SHV...TSA...FWD...OUN... LAT...LON 33679530 33869643 34069668 34209674 34659654 35029607 35109531 34849459 33939438 33639446 33599470 33679530 Read more

SPC MD 2274

1 year 8 months ago
MD 2274 CONCERNING TORNADO WATCH 711... FOR SOUTHEAST TX...MUCH OF LA
Mesoscale Discussion 2274 NWS Storm Prediction Center Norman OK 0235 PM CST Mon Nov 20 2023 Areas affected...Southeast TX...Much of LA Concerning...Tornado Watch 711... Valid 202035Z - 202200Z The severe weather threat for Tornado Watch 711 continues. SUMMARY...Threat for supercells capable of all severe hazards, including strong tornadoes, continues. Greatest near-term tornado threat exists from far southeast Texas through west-central and central Louisiana. DISCUSSION...Recent surface analysis reveals a complex pattern with several different boundaries in place across far southeast TX and LA this afternoon. Thunderstorms have been increasing along an axis of pre-frontal convergence that exists just of ahead of the eastward-progressing cold front. This pre-frontal trough exists roughly from the central LA/TX border (about 40 miles southwest of SHV) south-southwestward through Liberty County TX. Environment ahead of this trough continues to destabilize amid low-level moisture advection, with 70 deg F dewpoints in place ahead of this axis across southeast TX and southwest LA. This area of greater low-level moisture is advecting northward, coincident with strengthening low-level flow. This strengthening low-level flow is contributing to longer low-level hodographs and greater storm-relative helicity. As such, an increase in tornadic supercells appears possible over the next hour or two, particularly from Jasper County TX northeastward into west-central/central LA. ..Mosier.. 11/20/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LCH...SHV...HGX... LAT...LON 30059255 29829313 29789387 30049456 30529464 31499420 32119397 32519324 32469247 32279218 31889206 31399201 30509230 30059255 Read more