Severe Storms

MD 1756 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR NORTH-CENTRAL KANSAS TOWARD THE NEBRASKA BORDER
Mesoscale Discussion 1756 NWS Storm Prediction Center Norman OK 0435 PM CDT Fri Jul 28 2023 Areas affected...north-central Kansas toward the Nebraska border Concerning...Severe potential...Watch unlikely Valid 282135Z - 290000Z Probability of Watch Issuance...20 percent SUMMARY...A few storms may reach severe levels producing locally damaging gusts or hail. Overall storm coverage is not expected to warrant a watch. DISCUSSION...A very hot air mass has developed over KS and into southern NE, south of a stationary front. Isolated cells have already developed on the nose of the heat plume where convergence is maximized toward the boundary. Visible imagery shows additional towering CU farther south into across KS, and additional cells are expected there. Weak shear and inverted-V type profiles will favor robust but short-lived updrafts, briefly producing hail and then collapsing. Localized wind damage may occur with the stronger cells. ..Jewell/Grams.. 07/28/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OAX...TOP...ICT...GID...DDC...GLD... LAT...LON 39519963 39789901 39989859 40169799 40199762 39909693 39439662 38909683 38789762 38749868 38779970 39029987 39519963 Read more

MD 1755 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR FAR SOUTHEAST WYOMING...FAR SOUTHWEST NEBRASKA PANHANDLE...AND PARTS OF NORTHEAST AND CENTRAL COLORADO.
Mesoscale Discussion 1755 NWS Storm Prediction Center Norman OK 0420 PM CDT Fri Jul 28 2023 Areas affected...Far southeast Wyoming...far southwest Nebraska Panhandle...and parts of northeast and central Colorado. Concerning...Severe potential...Watch unlikely Valid 282120Z - 282245Z Probability of Watch Issuance...20 percent SUMMARY...A few strong to severe storms are expected to continue into the evening. DISCUSSION...Deep but relatively weak (2km deep and less than 10 knots per FTG VWP) upslope flow has been sufficient for storm development along the Front Range from southeast Wyoming into north-central Colorado. These storms have formed on the southern periphery of stronger mid-level flow and thus a small region of favorable conditions exists across north-central Colorado into far southeast Wyoming and vicinity with around 1000 J/kg MLCAPE and effective shear around 30 knots. Multicell clusters with potentially some supercell characteristics will continue across the region with some threat for isolated damaging wind gusts or large hail. This threat should wane by late evening as the boundary layer cools and stabilizes. Due to the marginal intensity and limited duration of the threat, no watch is expected. ..Bentley/Grams.. 07/28/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...PUB...BOU...CYS... LAT...LON 39830512 41060502 41460456 41110323 38750327 38480453 38780519 39830512 Read more

WW 0559 Status Updates
STATUS FOR WATCH 0559 HAS NOT BEEN ISSUED YET Read more

WW 559 SEVERE TSTM MN WI 282105Z - 290300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 559 NWS Storm Prediction Center Norman OK 405 PM CDT Fri Jul 28 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southeast Minnesota West central Wisconsin * Effective this Friday afternoon and evening from 405 PM until 1000 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Thunderstorm development is expected late this afternoon from Minnesota into Wisconsin, where the storm environment favors supercells capable of producing large hail/damaging winds. There will be some potential for cluster development later this evening. The severe thunderstorm watch area is approximately along and 70 statute miles north and south of a line from 25 miles north of Mankato MN to 60 miles east southeast of Eau Claire WI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for 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. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 557...WW 558... AVIATION...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 550. Mean storm motion vector 27035. ...Thompson Read more

MD 1754 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR PARTS OF EASTERN NE INTO IA
Mesoscale Discussion 1754 NWS Storm Prediction Center Norman OK 0355 PM CDT Fri Jul 28 2023 Areas affected...Parts of eastern NE into IA Concerning...Severe potential...Watch possible Valid 282055Z - 282230Z Probability of Watch Issuance...40 percent SUMMARY...The risk of severe storms should increase during the next couple of hours. A watch may eventually be needed for parts of the area. DISCUSSION...Diurnal heating of a very moist air mass (upper 70s to near 80s surface dewpoints) beneath a plume of steep midlevel lapse rates is underway from parts of eastern NE into IA -- along and south of a WSW/ENE-oriented stationary boundary. Over parts of eastern NE, gradually deepening boundary-layer cumulus suggests isolated convective initiation is possible during the next hour or two. Farther east, cumulus development remains shallow -- suggesting lingering inhibition at the base of the EML. Continued heating and eroding inhibition in the vicinity of the stationary boundary should support isolated thunderstorm development in the next couple of hours, and 40-50 kt of effective shear will support discrete/semi-discrete supercells given the extremely unstable surface-based instability. The primary concerns will very large hail and severe gusts. Generally weak large-scale ascent and the lingering inhibition casts uncertainty on storm coverage, though trends are being monitored for a possible watch this afternoon. ..Weinman/Thompson.. 07/28/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DVN...ARX...DMX...FSD...OAX...GID...LBF... LAT...LON 41599899 42159834 43209639 43469416 43339194 42039214 41439624 40649797 40839888 41599899 Read more

WW 0558 Status Updates
STATUS FOR WATCH 0558 HAS NOT BEEN ISSUED YET Read more

WW 558 SEVERE TSTM DC MD VA WV CW 282045Z - 290300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 558 NWS Storm Prediction Center Norman OK 445 PM EDT Fri Jul 28 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of District Of Columbia Maryland Northern Virginia Eastern West Virginia Coastal Waters * Effective this Friday afternoon and evening from 445 PM until 1100 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible SUMMARY...A band of thunderstorms with a history of wind damage will move across the higher terrain through the remainder of the afternoon, with additional storm clusters/downbursts expected farther east toward I-95. The severe thunderstorm watch area is approximately along and 45 statute miles east and west of a line from 10 miles east northeast of Hagerstown MD to 35 miles west of Roanoke VA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for 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. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 557... AVIATION...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 27025. ...Thompson Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0251 PM CDT Fri Jul 28 2023 Valid 282000Z - 291200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS LATER THIS AFTERNOON INTO EARLY TONIGHT FROM NORTHERN IA TO NORTHERN IN AND VICINITY... ...SUMMARY... Severe storms are most probable from Iowa and southern Minnesota eastward to northern Illinois/southern Wisconsin late this afternoon/evening, and continuing into southwest Lower Michigan and northern Indiana tonight. Damaging winds and large hail are the main threats. ...20Z Update... Minor changes were made to the wind probabilities in the upper Midwest and upper Ohio Valley vicinity. The remainder of the outlook is unchanged as the previous forecast reasoning remains valid. ..Wendt.. 07/28/2023 .PREV DISCUSSION... /ISSUED 1120 AM CDT Fri Jul 28 2023/ ...SD/NE to the Upper Midwest through tonight... Within a largely zonal flow regime, embedded speed maxima will move eastward over the central/northern Plains and the upper MS Valley - the most pronounced of which is now over ND. Convection and an outflow/frontal surge with this ND speed max will eventually interact with the north edge of the more moist/unstable air mass from southeast SD/southern MN into northern IA/southern WI later this afternoon/evening. The timing of convective initiation and details of subsequent storm evolution are both somewhat in question, but effective bulk shear near 50 kt and MLCAPE of 2500-4000 J/kg will conditionally favor splitting supercells initially with very large hail. Convection could then grow upscale into an MCS this evening into tonight, with an attendant threat for damaging winds. ...Upper OH Valley into the Mid-Atlantic this afternoon/evening... A remnant MCV over northern IN will move eastward over OH today, and additional convection expected today along the associated outflow boundary/differential heating zone across central/eastern OH. The stronger flow with the MCV will tend to trail the lead outflow, so multicell storms with occasional downburst winds will be the primary threat this afternoon. Farther east, vertical shear will be weak, but surface heating over the higher terrain and weak convergence along a diffuse baroclinic zone will support scattered thunderstorm development this afternoon from the central Appalachians into parts of the Mid-Atlantic. Isolated strong downburst winds for a few hours this afternoon/evening will be the main concern this area. ...Northern ME this evening... A northern stream shortwave trough and associated surface cold front will cross Quebec and northern ME later this afternoon into this evening. Midlevel lapse rates will not be steep, but MLCAPE near 1000 J/kg and relatively long hodographs will support the potential for wind damage with a band of storms along and just ahead of the cold front. ...Southern MT to northeast CO and vicinity through tonight... Subtle speed maxima will move around the northern periphery of the southern Rockies midlevel high, interacting with terrain circulations and a deepening mixed layer later this afternoon. High-based storm development is expected around mid afternoon from southern MT to southeast WY/northeast CO, where storm clusters will move off the high terrain in response to mid-upper westerlies, and inverted-V profiles will favor isolated strong-severe outflow gusts as the main concerns. Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0231 PM CDT Fri Jul 28 2023 Valid 291200Z - 301200Z ...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF NORTHWEST NEVADA...FAR NORTHEAST CALIFORNIA...AND SOUTH-CENTRAL OREGON...... The previous forecast remains largely on track. The elevated area across north-central Oregon and central Washington was expanded slightly southwestward and northward, based on latest guidance and observations. Otherwise, no additional changes were made to the previous forecast. ..Marsh.. 07/28/2023 .PREV DISCUSSION... /ISSUED 1256 AM CDT Fri Jul 28 2023/ ...Synopsis... As a mid-level ridge builds across the western CONUS on Saturday, a shortwave will move along the western periphery of this ridge into the Northwest. This will spread moderate mid-level flow over the region. Downslope flow is likely in the lee of the northern Sierra and southern Cascades during this period. In addition, a hot and deeply mixed airmass will be in place, and some of this stronger flow may be transported to the surface. Have added a Critical delineation where 20 to 25 mph winds are most likely with relative humidity around 7 to 10 percent. Some downslope/gap flow is also possible in north-central Oregon and south-central Washington from the Columbia River Gorge and Cascade gaps. This threat may be later, as the surface pressure gradient tightens near 00Z. ...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 1230 PM CDT Fri Jul 28 2023 Valid 291200Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF SOUTHERN NEW ENGLAND AND THE MID-ATLANTIC...PARTS OF THE CENTRAL HIGH PLAINS... ...SUMMARY... Widely scattered to scattered strong to severe thunderstorms are possible over southern New England into the Mid Atlantic states on Saturday. Damaging gusts are the primary hazard. Widely scattered severe storms are also possible over the north-central Great Plains late Saturday into Saturday night. ...Synopsis... The upper-level ridge centered over the Divide will amplify on Saturday. Some amplification of the cyclonic flow aloft over the Northeast is also expected. At the surface, a frontal boundary will continue to sag southward within the Plains into the Northeast. This front will likely become more diffuse with time, however. Farther west, modest moist upslope flow will occur in the central/northern High Plains behind the boundary. ...Mid-Atlantic into southern New England... Widely scattered to scattered storms are expected to develop by afternoon either along the front or along a surface trough near the Blue Ridge. Despite modest mid-level lapse rates, strong surface heating and a very moist boundary layer will support moderate to strong buoyancy (2000-3000 J/kg MLCAPE). The greatest values will likely occur within central/eastern Virginia into perhaps the Delmarva. Farther north, more limited heating and weaker mid-level lapse rates will limit overall destabilization. With the amplifying upper-level pattern, moderate mid-level winds will exist as far south as the northern Mid-Atlantic and decrease fairly rapidly to the south. That being said, the overlap of the most buoyant air and the greater deep-layer shear will not be spatially broad. Given the degree of buoyancy, damaging downburst winds are the expected primary threat with isolated large hail possible with initial storm development. A complicating factor in the forecast will be the timing and location of an MCV moving out of the Great Lakes region. Depending on where this feature is located, an area of greater mesoscale shear and storm coverage could develop within a zone from central Virginia into the Delmarva. Confidence remains too low for an increase in wind probabilities. ...Black Hills Vicinity... An uncertain forecast is evident for the region. Storms associated with a MCV moving out of Montana could be ongoing early in the period. While these storms would likely be elevated, strong deep-layer shear and adequate elevated buoyancy would promote some risk for large hail and perhaps a strong/severe wind gusts. Outflow from this early activity could also provide the focus for additional convective development farther south into northwest Nebraska. Model spread remains high in terms of the expected evolution. The Slight risk will be maintained this outlook cycle, though confidence in any one eventual scenario is low. ...Mid-Mississippi and Lower Ohio Valleys... Moderate to strong buoyancy is anticipated south of the surface front. Models suggest the MCV moving into the central Plains will likely provide lift for eventual development of a cluster of thunderstorms. Deep-layer shear will not be overly strong, particularly farther south from the boundary, but should be sufficient for modest storm organization. The timing and location of development is uncertain, but intensification could occur within northern/eastern Missouri. Damaging wind gusts would be the primary threat, though isolated large hail could also occur. ...Northern Plains... Storm coverage will likely be limited given the amplification of the ridge aloft. However, enough low-level moisture flowing into the terrain should allow a few storms to develop in the northern Rockies. Guidance also suggests development is possible in southern Alberta with eventual movement into northeast Montana and far western North Dakota. Shear profiles would support supercells capable of large hail and strong/severe wind gusts. ..Wendt.. 07/28/2023 Read more

WW 0555 Status Updates
STATUS REPORT ON WW 555 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..BENTLEY..07/27/23 ATTN...WFO...LWX...PHI...CTP... STATUS REPORT FOR WS 555 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS DEC001-003-272340- DE . DELAWARE COUNTIES INCLUDED ARE KENT NEW CASTLE DCC001-272340- DC . DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE DISTRICT OF COLUMBIA MDC001-003-005-013-015-021-023-025-027-029-031-033-035-043-510- 272340- MD . MARYLAND COUNTIES INCLUDED ARE ALLEGANY ANNE ARUNDEL BALTIMORE CARROLL CECIL FREDERICK GARRETT HARFORD HOWARD KENT MONTGOMERY PRINCE GEORGES Read more

WW 555 SEVERE TSTM DC DE MD NJ PA VA WV CW 271915Z - 280300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 555 NWS Storm Prediction Center Norman OK 315 PM EDT Thu Jul 27 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of District Of Columbia Northern Delaware Northern Maryland New Jersey Southern and Eastern Pennsylvania Northern Virginia Eastern Panhandle of West Virginia Coastal Waters * Effective this Thursday afternoon and evening from 315 PM until 1100 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible SUMMARY...Thunderstorms are expected to become more numerous across the watch area this afternoon, with a few strong to severe storms expected. Locally damaging wind gusts appear to be the main risk. The severe thunderstorm watch area is approximately along and 60 statute miles north and south of a line from 65 miles west of Martinsburg WV to 25 miles north of Lakehurst NJ. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU5). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for 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. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 553...WW 554... AVIATION...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 27025. ...Hart Read more

MD 1743 CONCERNING SEVERE THUNDERSTORM WATCH 553...555... FOR PORTIONS OF THE MID-ATLANTIC INTO NEW ENGLAND
Mesoscale Discussion 1743 NWS Storm Prediction Center Norman OK 0507 PM CDT Thu Jul 27 2023 Areas affected...Portions of the Mid-Atlantic into New England Concerning...Severe Thunderstorm Watch 553...555... Valid 272207Z - 272330Z The severe weather threat for Severe Thunderstorm Watch 553, 555 continues. SUMMARY...The severe weather threat will continue for a few more hours from the Mid-Atlantic to southern New England. DISCUSSION...Storms have congealed into a southward drifting line from eastern Pennsylvania to eastern Massachusetts. The best severe wind gust potential will likely remain across portions of Massachusetts, Rhode Island, and Connecticut where storms are oriented more normal to the deep-layer shear. Farther west along this line, some isolated damaging wind gusts, but less favorable orientation should result in a more sub-severe threat. Once the storms across southern New England move offshore, expect the severe threat to be more marginal and isolated along the trailing line of storms. ..Bentley.. 07/27/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BOX...OKX...ALY...PHI...BGM...CTP... LAT...LON 41207699 41647505 42297265 42747063 42617037 42337053 42137032 42126997 41796984 41536995 41447022 41047140 40787230 40597344 40587392 40667478 40737560 40757604 40767637 40827667 40937690 41007697 41207699 Read more

WW 0556 Status Updates
STATUS FOR WATCH 0556 HAS NOT BEEN ISSUED YET Read more

WW 556 SEVERE TSTM MI WI LM LS 272150Z - 280400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 556 NWS Storm Prediction Center Norman OK 450 PM CDT Thu Jul 27 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western Upper Michigan North-central and northeast Wisconsin Lake Michigan Lake Superior * Effective this Thursday afternoon and evening from 450 PM until 1100 PM CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Congealing clusters should spread east-southeast this evening with a threat for damaging winds and large hail. The severe thunderstorm watch area is approximately along and 80 statute miles east and west of a line from 35 miles north northwest of Marquette MI to 45 miles south southeast of Mosinee WI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU6). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for 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. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 553...WW 554...WW 555... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 29030. ...Grams Read more

MD 1742 CONCERNING SEVERE THUNDERSTORM WATCH 554... FOR PORTIONS OF EASTERN MN INTO NORTHERN/CENTRAL WI AND THE U.P. OF MI
Mesoscale Discussion 1742 NWS Storm Prediction Center Norman OK 0436 PM CDT Thu Jul 27 2023 Areas affected...Portions of eastern MN into northern/central WI and the U.P. of MI Concerning...Severe Thunderstorm Watch 554... Valid 272136Z - 272300Z The severe weather threat for Severe Thunderstorm Watch 554 continues. SUMMARY...The threat for large hail and damaging winds will likely spread eastward over the next couple of hours. Downstream watch issuance will likely be needed. DISCUSSION...Multiple supercells are ongoing this afternoon across parts of northwestern WI and east-central MN. Multiple measured severe hail reports of 1 to 2 inches have occurred with this activity. Recent radar trends show some updraft interactions, and the beginning stages of clustering/upscale growth may continue. Regardless, a continued threat for large to very large hail will persist in the short term, as strong instability (3000-3500+ J/kg of MLCAPE) and 40+ kt of deep-layer shear prove favorable for robust updrafts. A tornado also appears possible in the short term as well, mainly across northwestern WI where low-level shear is maximized in the presence of ongoing supercells. The threat for severe/damaging winds will likely increase this evening as thunderstorm clusters move eastward across northern/central WI and the U.P. of MI. The eastern extent of the severe threat remains somewhat unclear, as less instability is present towards Lake Michigan. Still, downstream Severe Thunderstorm Watch issuance will likely be required for the increasing hail/wind threat. ..Gleason/Grams.. 07/27/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MQT...GRB...DLH...ARX...MPX... LAT...LON 45399286 46119335 46859154 46878924 46508761 46018731 45228747 44478816 44459035 44729160 45399286 Read more

WW 0553 Status Updates
240- STATUS REPORT ON WW 553 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE AVP TO 20 ESE MSV TO 15 NNE POU TO 20 W BDL TO 15 W ORH TO 15 N PSM TO 20 SSW AUG TO 20 NNE AUG. ..BENTLEY..07/27/23 ATTN...WFO...OKX...BOX...ALY...GYX...BGM... STATUS REPORT FOR WS 553 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS CTC001-003-005-007-009-011-013-015-272240- CT . CONNECTICUT COUNTIES INCLUDED ARE FAIRFIELD HARTFORD LITCHFIELD MIDDLESEX NEW HAVEN NEW LONDON TOLLAND WINDHAM MEC001-005-011-013-015-023-027-031-272240- ME . MAINE COUNTIES INCLUDED ARE ANDROSCOGGIN CUMBERLAND KENNEBEC KNOX LINCOLN SAGADAHOC WALDO YORK MAC005-009-013-015-017-021-023-025-027-272240- MA Read more

WW 553 SEVERE TSTM CT MA ME NH NY PA RI VT CW 271645Z - 280000Z
0- URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 553 NWS Storm Prediction Center Norman OK 1245 PM EDT Thu Jul 27 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Connecticut Massachusetts Southern Maine Southern New Hampshire Southeast New York Northeast Pennsylvania Rhode Island Southern Vermont Coastal Waters * Effective this Thursday afternoon and evening from 1245 PM until 800 PM EDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Isolated large hail events to 1 inch in diameter possible A tornado or two possible SUMMARY...Thunderstorms will intensify this afternoon along a cold front and spread eastward across the watch area. Damaging wind gusts will be possible with the strongest cells through the afternoon. A tornado or two cannot be ruled out. The severe thunderstorm watch area is approximately along and 90 statute miles east and west of a line from 5 miles west northwest of Augusta ME to 30 miles south of Poughkeepsie NY. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for 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. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 26030. ...Hart Read more

WW 0554 Status Updates
STATUS REPORT ON WW 554 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 WNW BRD TO 25 E BRD TO 10 S DLH TO 30 ENE BFW. ..BENTLEY..07/27/23 ATTN...WFO...DLH...MPX... STATUS REPORT FOR WS 554 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MNC001-003-009-017-025-035-053-059-065-067-075-093-095-097-115- 123-141-145-153-163-171-272240- MN . MINNESOTA COUNTIES INCLUDED ARE AITKIN ANOKA BENTON CARLTON CHISAGO CROW WING HENNEPIN ISANTI KANABEC KANDIYOHI LAKE MEEKER MILLE LACS MORRISON PINE RAMSEY SHERBURNE STEARNS TODD WASHINGTON WRIGHT WIC003-005-007-013-017-031-033-035-051-093-095-099-107-109-113- 129-272240- WI . WISCONSIN COUNTIES INCLUDED ARE ASHLAND BARRON BAYFIELD BURNETT CHIPPEWA DOUGLAS DUNN EAU CLAIRE IRON PIERCE POLK PRICE Read more

WW 554 SEVERE TSTM MN WI LS 271905Z - 280200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 554 NWS Storm Prediction Center Norman OK 205 PM CDT Thu Jul 27 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and Eastern Minnesota Northwest Wisconsin Lake Superior * Effective this Thursday afternoon and evening from 205 PM until 900 PM CDT. * Primary threats include... Widespread large hail and isolated very large hail events to 3 inches in diameter likely Scattered damaging wind gusts to 70 mph likely A tornado or two possible SUMMARY...Thunderstorms will rapidly develop this afternoon over central Minnesota and track southeastward across the watch area. Very large hail and damaging winds will be possible. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 40 miles northwest of Brainerd MN to 15 miles south southeast of Ironwood MI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU4). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for 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. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 553... AVIATION...A few severe thunderstorms with hail surface and aloft to 3 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29030. ...Hart Read more