Severe Storms

No watches are valid as of Sat Sep 2 22:19:01 UTC 2023.

MD 2075 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR CENTRAL AND NORTHERN NEVADA INTO SOUTHWEST IDAHO
Mesoscale Discussion 2075 NWS Storm Prediction Center Norman OK 0516 PM CDT Sat Sep 02 2023 Areas affected...central and northern Nevada into southwest Idaho Concerning...Severe potential...Watch unlikely Valid 022216Z - 030045Z Probability of Watch Issuance...5 percent SUMMARY...Strong to marginally severe storms may persist for a few hours into central and northern Nevada, and possibly into far southwest Idaho this evening. Hail up to 1.25" diameter will be possible, along with sporadic strong gusts. DISCUSSION...Storms are increasing near the cold front/midlevel temperature gradient over west-central NV, beneath 35-40 kt midlevel southerlies. Wind speeds increase further with height, which is elongating hodographs and supporting a conditional hail threat. Visible satellite imagery shows clearing/heating ahead of the front, with low-level theta-e advection present. Given the time of day, a few hours of strong storms are expected within a corridor from Lander County NV toward Owyhee County ID through evening. Relatively cool profiles may preclude much wind threat, unless storms evolve into small bows. Otherwise, isolated hail of 1.00-1.25" appears most likely. ..Jewell/Grams.. 09/02/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BOI...LKN...REV... LAT...LON 39031771 39791750 40471743 41151743 41841750 42201758 42421737 42551667 42471596 42221569 41651560 40811563 40081584 39571601 38951676 38881748 39031771 Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0323 PM CDT Sat Sep 02 2023 Valid 041200Z - 101200Z Fire weather concerns will likely remain focused through the central and southern CONUS through the extended period. Long-range guidance continues to show good agreement in the weakening of the upper ridge over the central U.S. as the West Coast upper wave de-amplifies and migrates east. This will establish a broad southwest flow regime over the middle of the country by early next week that will be conducive for pronounced lee troughing and strengthening low-level winds through the Plains. ...D3/Monday - Southern to central Plains... A strong lee trough (by early September standards) is expected to gradually become established over the next 72 hours along the High Plains. The resulting mass response will yield widespread 15-25 mph winds through the southern to central Plains - a region with antecedent dry fuels and minimal rain chances until late next week. The coverage and severity of the fire weather threat will likely be determined by the degree of diurnal mixing and boundary-layer moisture quality. Currently, a plume of 60+ F dewpoints exists through the eastern Plains and MS River Valley, and should remain in the region through D3/Monday. Areas on the western fringe of this moisture will see a higher probability for sub-20% RH and a corresponding greater chance for critical fire weather conditions. Ensemble guidance hints that areas across NE to MN and northwest TX/western OK - which should be in closer proximity to regional surface lows - will see the highest potential for sustained elevated (and potentially critical) conditions, but more localized/transient elevated conditions may develop through much of KS. ...D4/Tuesday and beyond - southern Plains... Hot conditions are expected to persist across the southern Plains and into the Southwest region through the middle of the work week. The southwesterly flow regime will eventually give way to a re-consolidation of the upper ridge over the southern US by late week. This synoptic pattern is not overly favorable for widespread/critical fire weather conditions. However, several days of 100+ F high temperatures across OK/TX will promote further curing of already dry fuels. While predictability of regional winds remains limited in this regime, localized fire weather concerns could emerge through the end of the work week prior to a slight increase in rain chances. ..Moore.. 09/02/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0259 PM CDT Sat Sep 02 2023 Valid 022000Z - 031200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms are not expected through tonight. ...20Z Update... Thunderstorms are gradually increasing in coverage this afternoon from southeast CA/western AZ into NV. A marginal supercell or two cannot be ruled out later this afternoon across parts of central/northern NV, given the presence of 30-40 kt effective shear to the east of a stationary upper low across northern CA/southern OR, but generally weak midlevel lapse rates and limited buoyancy are expected to limit the potential for severe hail/wind. Other strong storms remain possible into the lower CO Valley region, where weaker shear but stronger instability is in place compared to areas farther north. See the previous discussion below for more information. ..Dean.. 09/02/2023 .PREV DISCUSSION... /ISSUED 1127 AM CDT Sat Sep 02 2023/ ...Lower Colorado Valley region... A very moist environment will remain in place with PW values of 1.75 to 2 inches. Diurnal heating will contribute to moderate/locally strong MLCAPE (1500-2500 J/kg) this afternoon with negligible CINH. Thunderstorms are expected to develop or increase in coverage, aided by diffluent upper-level flow downstream of an upper low over the northwest CA coast, and ascent with a weak mid-level impulse lifting northeast from northern Baja Peninsula. Despite overall weak shear through the cloud-bearing layer, an isolated stronger storm will be capable of strong gusts. ...Central/northern Nevada... Morning cloud cover/precipitation persists across the area, however some heating/destabilization is expected this afternoon in the vicinity of a stationary front where MLCAPE of 400-800 J/kg should develop. Scattered thunderstorms are expected to redevelop in the vicinity of the front, where mid-level flow of 35-45 kts east of the upper low will contribute to a couple more organized cells. Localized strong wind gusts will be possible, but the lack of greater buoyancy casts doubt on the overall magnitude of the severe risk. Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0122 PM CDT Sat Sep 02 2023 Valid 031200Z - 041200Z Confidence in reaching elevated/critical RH criteria across eastern NE into IA remains fairly low, which casts considerable uncertainty onto the overall fire threat for Sunday. Recent RAP and HRRR solutions, which typically exhibit deeper boundary-layer mixing, depict only modest RH reductions into the 25-35% range. This may be attributed to anomalously warm 850-700 mb temperatures at the base of a pronounced EML over the region that is stunting the depth of diurnal mixing, as well as a reservoir of low to mid-60s dewpoints already in place over IA. Regardless, there is a sufficiently consistent signal across guidance (including ensemble guidance) to warrant bifurcating the Elevated risk area, highlighting the regions most likely to experience sustained/widespread fire weather concerns (predominantly western to central KS and southwest WI). Localized elevated conditions may still materialize across NE into IA, but should be transient in nature. ..Moore.. 09/02/2023 .PREV DISCUSSION... /ISSUED 1228 AM CDT Sat Sep 02 2023/ ...Synopsis... The upper-level trough in the West will eject into the Great Basin on Sunday. Eastward into the Plains, some deepening of the surface trough can be expected as the synoptic system approaches. ...Central Plains into the upper Mississippi Valley... Stronger winds are expected within the boundary layer on Sunday as low-level pressure gradients increase in strength. Models continue to show variability in the degree of mixing by the afternoon given differences in moisture return northward. However, it does seem probable that an area of dry and breezy conditions will exist along the western/northern periphery of the surface ridge in the Southeast. RH of 15-20% (locally lower) is most probable in parts of Kansas/Nebraska. RH could fall to similar levels into the upper Midwest, but uncertainty is high. RH of 20-25% becomes more likely into Iowa/Minnesota/Wisconsin. Winds of 15-20 mph (with areas of higher gusts) are expected. Elevated fire weather is possible for a few hours. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

No Mesoscale Discussions are in effect as of Fri Sep 1 22:01:01 UTC 2023.

No watches are valid as of Fri Sep 1 22:01:01 UTC 2023.

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0337 PM CDT Fri Sep 01 2023 Valid 031200Z - 091200Z Fire weather concerns will primarily be focused across the Plains and into the upper Mississippi River Valley through the extended period. Long-range guidance shows reasonably good agreement in the gradual weakening of the upper ridge over the central CONUS through the weekend and into early next week as a West Coast trough migrates east into the northern Rockies. Surface pressure falls in response to this feature will strengthen low-level winds, which should promote an increase in fire weather concerns given several preceding days of warm/dry conditions and antecedent dry fuels. ...D3/Sunday - Central Plains to the Upper MS River Valley... The 850-700 mb thermal ridge currently over the central High Plains is expected to gradually spread northeast over the next several days as a broad southwesterly flow regime becomes established. This will place anomalously warm temperatures (near to above the 90th percentile for early September) across the central Plains and the upper MS River Valley. Concurrently, a gradually deepening surface low over the northern High Plains will establish a broad southerly flow regime at the surface. Ensemble guidance suggests that surface winds will likely reach 15 mph by peak heating with RH values in the 20-25% range. While drier solutions hint that critical conditions are possible, elevated conditions appear more likely across a somewhat large swath of the region. However, considerable spread in the moisture return is noted, which casts uncertainty into the north/northeastern extent of the threat. ...D4/Monday - Southern to Central Plains... Further deepening of the lee surface trough is expected heading into D4/Monday. Nearly all guidance depicts a stronger wind signal across the Plains compared to D3/Sunday as southerly winds increase to 20-25 mph. Fire weather concerns will likely emerge across the Plains, but the quality of moisture return may determine the spatial coverage and severity. Recent GEFS guidance shows the highest probability for sub-20% RH across NE into SD/MN, as well as across parts of northwest TX into southwest OK in the vicinity of a secondary surface low. However, these solutions may be influenced by a noted GFS dry bias. While the potential for critical conditions and/or more widespread elevated conditions is noted, confidence remains too limited to introduce higher probabilities or more extensive risk areas. ...Beyond D4/Monday - Southern Plains... The upper ridge will gradually de-amplify and shift into the southern Plains/Southwest through the upcoming work week. This will maintain hot, dry weather across a region that already has receptive fuels. Consequently, fire weather concerns are most likely to emerge across this region after D4/Monday, though confidence in the evolution of the low-level winds field under the upper ridge is too low to introduce additional risk areas at this time. ..Moore.. 09/01/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0255 PM CDT Fri Sep 01 2023 Valid 012000Z - 021200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTHERN AZ AND SOUTHEASTERN CA INTO SOUTHEAST ID... ...SUMMARY... Isolated severe gusts and hail will remain possible into this evening, from southern Arizona and southeastern California to southern Idaho. ...20Z Update... No changes have been made to the severe probabilities. Thunderstorms capable of producing localized severe gusts and isolated hail will persist through the afternoon across parts of the Desert Southwest, and increase in coverage later this afternoon into parts of the eastern Great Basin. See the previous discussion below for more information, and MCD 2074 for information regarding the short-term threat across parts of southeast CA and the lower CO River Valley vicinity. ..Dean.. 09/01/2023 .PREV DISCUSSION... /ISSUED 1116 AM CDT Fri Sep 01 2023/ ...AZ/Southeastern CA into Eastern Great Basin... Morning satellite and radar imagery shows showers and isolated thunderstorms from southern NV into western UT, within a band of clouds arcing from western AZ through eastern NV/western UT and into WY. This band and associated showers are expected to gradually shift eastward/northeastward throughout the day. Additional thunderstorm development is anticipated later this afternoon to the west of this band, where the airmass is expected to destabilize amid daytime heating and ample low/mid-level moisture. Ascent for this thunderstorm development will be provide by broad low-level convergence between the upper low drifting southwestward towards northern CA and the persistent upper ridging over the central/southern Plains. Moderate mid-level flow will exist between these two features, supporting enough vertical shear for some briefly organized storm structures, and any stronger/more persistent updrafts could produce isolated hail. Cloud bases are not expected to be high by western CONUS standards, but steep low-level lapse rates could still support strong downbursts in areas where clouds clear and some heating is realized. ...Elsewhere... Scattered to numerous thunderstorms are expected across the Southeast, where ample low-level moisture and strong heating will destabilize the airmass in the vicinity of an easterly wave moving across the region. Weak vertical shear will limit storm organization and severity, with an outflow-dominant, multicell mode anticipated. Even so, a damaging gust or two is possible amid strong water loading and forward-propagating storm structures. Ongoing cluster of showers and thunderstorms across SD may persist for the next hour or two, before dissipating as it the low-level jet weakens and the cluster continues northeastward. A few elevated thunderstorms are also possible early tomorrow morning across the Upper Midwest, forced by a strong low-level jet and related warm-air advection (and perhaps weak ascent attendant to a convectively augmented shortwave trough). Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 PM CDT Fri Sep 01 2023 Valid 021200Z - 031200Z An Elevated risk area is introduced for portions of northwest KS into central NE. Ensemble guidance has trended towards higher probability of several hours of sub-20% RH with 15-20 mph winds across this region. Although winds are still expected to be slightly weaker than today, temperatures will be several degrees warmer with corresponding lower afternoon RH. Given antecedent dry fuels (exacerbated by today's dry, windy conditions), fire weather concerns seems probable. Elevated conditions may also materialize across northeast WY within a modest downslope flow regime, but considerable ensemble spread limits confidence in the spatial/temporal extent of the threat. ..Moore.. 09/01/2023 .PREV DISCUSSION... /ISSUED 1237 AM CDT Fri Sep 01 2023/ ...Synopsis... The closed low off the northern California coast will begin a transition to an open wave on Saturday. The upper ridge will remain entrenched in the Plains. A similar surface pattern is expected to Friday across the central U.S., though features (and winds) are likely to be weaker. Locally elevated conditions appear possible in parts of the central Plains again. There is considerable spread within guidance as to how dry conditions will be by the afternoon. Though conditions may tend towards the drier guidance, as they often do with trajectories generally out of the surface high, sustained winds (and gusts) are expected to be lighter on Saturday. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1231 PM CDT Fri Sep 01 2023 Valid 021200Z - 031200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected across the continental United States on Saturday. ...Synopsis and Discussion... An upper low will remain situated near coastal northern CA on Saturday, with an upper high over the central Plains. Between the two features, southerly flow will maintain moisture over the Great basin and parts of the Southwest, with daytime showers and thunderstorms common. Areas of clouds and ongoing precipitation early in the day will inhibit heating in many areas, and as such MLCAPE is likely to be limited to 500 J/kg over much of the region. Activity is likely during the morning from northwest AZ across much of NV, with thunderstorm probabilities maximized during the late afternoon with the aid of heating. Forecast soundings show limited lapse rates relative to Friday, but modest deep-layer shear does exist with around 35 kt. Sporadic strong gusts may occur anywhere within the region, but overall severe probabilities appear low. Straight hodographs and cooler air aloft closer to the upper low from northern NV into southern ID may support small hail. ..Jewell.. 09/01/2023 Read more

No watches are valid as of Thu Aug 31 22:17:01 UTC 2023.

No Mesoscale Discussions are in effect as of Thu Aug 31 22:17:01 UTC 2023.

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0433 PM CDT Thu Aug 31 2023 Valid 021200Z - 081200Z A large upper-level trough will bring cool and wet conditions to much of the West Coast. Portions of the Inter-Mountain West will be breezy through the period, but these breezy conditions are expected where fuels are already moist and where additional monsoon moisture is expected with several days of wet thunderstorms expected to moisten fuels further. Therefore, the primary fire weather concerns will be across the central and northern Plains where several weeks of dry conditions have started to dry out fuels and across Texas where exceptional drought continues with very susceptible fuels. Lee troughing is expected across the Plains for much of the next week as the upper-level trough advances east and several mid-level shortwave troughs traverse the central Rockies. There is still a fair amount of uncertainty which days will have the strongest winds and where those winds will overlap low relative humidity which precludes critical probabilities at this time. However, drying fuels and an extended period of warm/dry conditions should result in critically dry fuels for much of the Plains by next week. Therefore, once the timing and location of dry and breezy conditions becomes more clear in later outlooks, critical probabilities or Day 1/2 Elevated/Critical areas may be needed. ..Bentley.. 08/31/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0248 PM CDT Thu Aug 31 2023 Valid 011200Z - 021200Z Fuels have dried across the plains the past few days amid a dry, continental airmass. Therefore, when dry and breezy conditions develop tomorrow, in response to lee troughing across western South Dakota, large fire concerns will be elevated from southwest Kansas into central Nebraska. Sustained winds could exceed 20 mph for a few hours in the afternoon with relative humidity in the upper teens. Therefore, despite fuels that may only be marginally dry, the strong winds should compensate. Otherwise, no changes were necessary. See previous discussion below. ..Bentley.. 08/31/2023 .PREV DISCUSSION... /ISSUED 1143 PM CDT Wed Aug 30 2023/ ...Synopsis... On Friday, the strongest winds will largely remain in regions where fuels do not support inclusion of highlights. A deepening trough across the West Coast will bring increasing moisture and shower and thunderstorm activity across northern California into the Great Basin. Windy and dry conditions will be possible across central Nevada into Utah, however recent rainfall has left fuels in this region well below seasonal normals which has tempered the fire threat. Lee troughing across the Central and Southern Plains will bring an increase in southerly flow, with potential for relative humidity dropping to around 20 percent. Overall, the strongest winds appear to be across the Oklahoma Panhandle northward into Colorado where fuels are too moist to include highlights at this time. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0243 PM CDT Thu Aug 31 2023 Valid 312000Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON AND EVENING ACROSS PARTS OF SOUTH CENTRAL THROUGH NORTHWESTERN ARIZONA...AND ADJACENT PORTIONS OF SOUTHEASTERN CALIFORNIA...SOUTHERN NEVADA AND SOUTHWESTERN UTAH... ...SUMMARY... Widely scattered thunderstorms with a few strong wind gusts are possible across Arizona and the Lower Colorado River Valley late this afternoon into evening. ...20Z Update... No changes were made to the severe probabilities, but there are some adjustments to the categorical (10 percent probability) thunder line to account for the progression of synoptic features, and current trends concerning destabilization. Particularly east of the Colorado Rockies into the northern Great Plains Red River Valley/Upper Midwest, stronger mid/upper support for convective development has shifted into the eastern Canadian Prairies, downstream of the significant mid-level low/troughing migrating north of the international border vicinity. A plume of rather modest moisture does exist ahead of associated lee surface troughing, extending south-southwestward across the eastern Dakotas toward the Raton Mesa vicinity. However, warm/dry layers in the lower/mid troposphere seem likely to suppress an appreciable risk for sustained thunderstorm development across much of this region. ..Kerr.. 08/31/2023 .PREV DISCUSSION... /ISSUED 1124 AM CDT Thu Aug 31 2023/ ...AZ/lower CO River Valley this afternoon through tonight... A midlevel high over NM this morning will shift east-northeastward toward the southern/central High Plains as an upstream shortwave trough evolves into a closed low over western OR and northern CA. A plume of 1.25-1.50 inch PW will be drawn northward from southwest AZ toward southeast NV and southwest UT through tonight around the northwest periphery of the NM high, as height gradients/flow gradually strengthen between the high and the developing Pacific coast low. This will result in some destabilization (when combined with daytime heating and deep mixing) and the potential for scattered high-based thunderstorms this afternoon into tonight from southern AZ into extreme southeast CA, southeast NV and extreme southwest UT. Thunderstorms are expected to develop over the Mogollon Rim and the higher terrain in southeast AZ, and subsequently spread westward/northwestward on convective outflows. MLCAPE up to 1000 J/kg with deep inverted-V profiles will support strong/isolated severe outflow gusts from later this afternoon into early tonight as thunderstorm clusters spread across AZ toward southeast NV/southwest UT. Read more

MD 2067 CONCERNING TORNADO WATCH 662... FOR PORTIONS OF THE CAROLINA COAST
Mesoscale Discussion 2067 NWS Storm Prediction Center Norman OK 0436 PM CDT Wed Aug 30 2023 Areas affected...portions of the Carolina coast Concerning...Tornado Watch 662... Valid 302136Z - 302230Z The severe weather threat for Tornado Watch 662 continues. SUMMARY...The risk for mini supercells and an attendant risk for a couple of tornadoes will likely continue to move northeast up the Carolina coast through the evening. A tornado watch will be considered to include portions of the Outer Banks to the northeast of the Tornado Watch #662 when the environment becomes more favorable for tornadoes. DISCUSSION...Late afternoon radar imagery from KLTX (Wilmington, NC) shows a cluster of quasi-discrete supercells near the northeast SC coast/Grand Strand vicinity and adjacent continental shelf waters south of Cape Fear. A significant increase in low-level shear has been observed at KLTX during the past 2 hours with 0-1 km SRH (using observed storm motion) in excess of 400 m2/s2. With a nearly saturated profile and mid 70s surface dewpoints, only weak buoyancy is analyzed. However, the strengthening low-level shear profiles and enlarging hodographs will continue to be favorable for low-level mesocyclones over the next few hours as the outer bands of Idalia continue northeastward up the coast. The area of favorable shear/buoyancy will probably overspread portions of the Outer Banks later this evening. ..Smith/Grams.. 08/30/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MHX...RAH...ILM...CHS... LAT...LON 33427996 33767980 35397647 35447595 35287554 34847542 32957915 33147971 33427996 Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0357 PM CDT Wed Aug 30 2023 Valid 011200Z - 071200Z Wetting rain is expected across a large portion of the Northwest and northern California on Day 2/3. As a result, dry fuels will primarily be limited to eastern Montana into North Dakota, and portions of central/east Texas into Louisiana and far western Mississippi. Windy conditions are expected across much of the Great Basin and into the central Rockies Day 3-5, but given current fuel states and an increase in low-level moisture with each day, fire weather concerns should remain minimal during this period. The greatest concern may start to materialize across the central/northern Plains into the Upper Midwest. Fuels are not quite dry at this time, but are trending that direction. Several days of dry and breezy conditions at the end of this week and into the weekend will dry fuels further and eventually they may be dry enough to support large fire spread. Therefore, fuel status will be monitored closely in this region and critical probabilities may eventually be needed. ..Bentley.. 08/30/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

WW 0662 Status Updates
STATUS REPORT ON WW 662 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..KERR..08/30/23 ATTN...WFO...ILM...CHS... STATUS REPORT FOR WT 662 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NCC019-047-129-141-302140- NC . NORTH CAROLINA COUNTIES INCLUDED ARE BRUNSWICK COLUMBUS NEW HANOVER PENDER SCC005-013-015-019-029-035-043-049-051-053-089-302140- SC . SOUTH CAROLINA COUNTIES INCLUDED ARE ALLENDALE BEAUFORT BERKELEY CHARLESTON COLLETON DORCHESTER GEORGETOWN HAMPTON HORRY JASPER WILLIAMSBURG AMZ250-252-254-256-330-350-352-302140- CW . ADJACENT COASTAL WATERS INCLUDED ARE Read more

WW 662 TORNADO NC SC CW 301450Z - 310200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 662 NWS Storm Prediction Center Norman OK 1050 AM EDT Wed Aug 30 2023 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Southern coastal North Carolina Coastal South Carolina Coastal Waters * Effective this Wednesday morning and evening from 1050 AM until 1000 PM EDT. * Primary threats include... A few tornadoes likely Isolated damaging wind gusts to 70 mph possible SUMMARY...Hurricane Idalia will move northeastward today near the southeast Atlantic coast. The potential for tornadoes will increase through this afternoon across coastal South Carolina, and the tornado threat will also increase into southern coastal North Carolina later this afternoon into early tonight. The tornado watch area is approximately along and 30 statute miles either side of a line from 65 miles west southwest of Charleston SC to 15 miles east of Wilmington NC. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). 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 661... 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 550. Mean storm motion vector 18030. ...Thompson Read more