Alert archive / North Carolina / Winter Weather Advisories in 2021
Winter Weather Advisory 2, NWS Raleigh, NC
NWS Raleigh, NC issued this winter weather advisory at Jan 27, 2021, 3:18 AM EST for 22 counties in North Carolina. It took effect at Jan 28, 2021, 12:00 AM EST. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Jan 27, 2021, 3:18 AM EST (08:18 UTC)
- In effect from
- Jan 28, 2021, 12:00 AM EST
- Expired
- Jan 28, 2021, 8:00 AM EST
- In force
- 8 hr
- Issued by
- NWS Raleigh, NC
All 22 counties
Alamance County, NC, Chatham County, NC, Davidson County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Johnston County, NC, Lee County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 8.3 hours before the alert went out and 101 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1846 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
940 WWUS42 KRAH 270818 WSWRAH URGENT - WINTER WEATHER MESSAGE National Weather Service Raleigh NC 318 AM EST Wed Jan 27 2021 ...Winter weather advisory in effect tonight... .A storm system crossing the region tonight combined with cold air moving in from the north will result in a changeover from rain to snow tonight across north central North Carolina. NCZ007>011-021>028-038>041-043-272200- /O.NEW.KRAH.WW.Y.0002.210128T0500Z-210128T1300Z/ Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance- Orange-Durham-Franklin-Nash-Edgecombe-Davidson-Randolph-Chatham- Wake-Wilson- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Roanoke Rapids, Enfield, Scotland Neck, Winston-Salem, Greensboro, High Point, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Louisburg, Franklinton, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, Lexington, Thomasville, Asheboro, Archdale, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, Knightdale, and Wilson 318 AM EST Wed Jan 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations of around one inch, with isolated totals near 2 inches possible. * WHERE...Northern portions of central North Carolina, mainly along and north of Highway 64. * WHEN...From midnight tonight to 8 AM EST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ GIH
5 follow-up statements
492 WWUS42 KRAH 271936 WSWRAH URGENT - WINTER WEATHER MESSAGE National Weather Service Raleigh NC 236 PM EST Wed Jan 27 2021 ...Winter weather advisory in effect tonight... .A storm system crossing the region tonight combined with cold air moving in from the north will result in a changeover from rain to snow tonight across north central North Carolina. NCZ042-076>078-281300- /O.EXA.KRAH.WW.Y.0002.210128T0500Z-210128T1300Z/ Johnston-Lee-Harnett-Wayne- Including the cities of Smithfield, Selma, Clayton, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, and Goldsboro 236 PM EST Wed Jan 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations around 1 inch, with isolated higher amounts. Highest amounts in the northern half of the county. * WHERE...Johnston, Lee, Harnett and Wayne Counties. * WHEN...From midnight tonight to 8 AM EST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ007>011-026>028-043-281300- /O.CON.KRAH.WW.Y.0002.210128T0500Z-210128T1300Z/ Person-Granville-Vance-Warren-Halifax-Franklin-Nash-Edgecombe- Wilson- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Roanoke Rapids, Enfield, Scotland Neck, Louisburg, Franklinton, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, and Wilson 236 PM EST Wed Jan 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations of 1 to 3 inches. * WHERE...Northern portions of central North Carolina, mainly along and north of Highway 64. * WHEN...From midnight tonight to 8 AM EST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ021>025-038>041-281300- /O.CON.KRAH.WW.Y.0002.210128T0500Z-210128T1300Z/ Forsyth-Guilford-Alamance-Orange-Durham-Davidson-Randolph-Chatham- Wake- Including the cities of Winston-Salem, Greensboro, High Point, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Lexington, Thomasville, Asheboro, Archdale, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, and Knightdale 236 PM EST Wed Jan 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations of around one inch, with isolated totals near 2 inches possible. * WHERE...Northern portions of central North Carolina, mainly along and north of Highway 64. * WHEN...From midnight tonight to 8 AM EST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ np
130 WWUS42 KRAH 280322 WSWRAH URGENT - WINTER WEATHER MESSAGE National Weather Service Raleigh NC 1022 PM EST Wed Jan 27 2021 ...Winter weather advisory in effect tonight... .A storm system crossing the region tonight combined with cold air moving in from the north will result in a changeover from rain to snow tonight across north central North Carolina. NCZ007>011-026>028-043-281130- /O.CON.KRAH.WW.Y.0002.210128T0500Z-210128T1300Z/ Person-Granville-Vance-Warren-Halifax-Franklin-Nash-Edgecombe- Wilson- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Roanoke Rapids, Enfield, Scotland Neck, Louisburg, Franklinton, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, and Wilson 1022 PM EST Wed Jan 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations of 1 to 3 inches. * WHERE...Northern portions of central North Carolina, mainly along and north of Highway 64. * WHEN...From midnight tonight to 8 AM EST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ021>025-038>041-281130- /O.CON.KRAH.WW.Y.0002.210128T0500Z-210128T1300Z/ Forsyth-Guilford-Alamance-Orange-Durham-Davidson-Randolph-Chatham- Wake- Including the cities of Winston-Salem, Greensboro, High Point, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Lexington, Thomasville, Asheboro, Archdale, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, and Knightdale 1022 PM EST Wed Jan 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations of around one inch, with isolated totals near 2 inches possible. * WHERE...Northern portions of central North Carolina, mainly along and north of Highway 64. * WHEN...From midnight tonight to 8 AM EST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ042-076>078-281130- /O.CON.KRAH.WW.Y.0002.210128T0500Z-210128T1300Z/ Johnston-Lee-Harnett-Wayne- Including the cities of Smithfield, Selma, Clayton, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, and Goldsboro 1022 PM EST Wed Jan 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations around 1 inch, with isolated higher amounts. Highest amounts in the northern half of the county. * WHERE...Johnston, Lee, Harnett and Wayne Counties. * WHEN...From midnight tonight to 8 AM EST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$
085 WWUS42 KRAH 280822 AAA WSWRAH URGENT - WINTER WEATHER MESSAGE...UPDATED National Weather Service Raleigh NC 322 AM EST Thu Jan 28 2021 ...Winter weather advisory in effect tonight... .A storm system crossing the region tonight combined with cold air moving in from the north will result in a changeover from rain to snow tonight across north central North Carolina. NCZ007>011-281300- /O.UPG.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ /O.NEW.KRAH.WS.W.0002.210128T0822Z-210128T1300Z/ Person-Granville-Vance-Warren-Halifax- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Roanoke Rapids, Enfield, and Scotland Neck 322 AM EST Thu Jan 28 2021 ...WINTER STORM WARNING IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Heavy snow. Additional snow accumulations of up to two inches. Total snow accumulations of 3 to 4 inches. * WHERE...Person, Granville, Vance, Warren and Halifax Counties. * WHEN...Until 8 AM EST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ026>028-043-281300- /O.CON.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Franklin-Nash-Edgecombe-Wilson- Including the cities of Louisburg, Franklinton, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, and Wilson 322 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Snow. Additional snow accumulations of one to two inches. * WHERE...Franklin, Edgecombe, Nash and Wilson Counties. * WHEN...Until 8 AM EST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ021>025-038>041-281300- /O.CON.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Forsyth-Guilford-Alamance-Orange-Durham-Davidson-Randolph-Chatham- Wake- Including the cities of Winston-Salem, Greensboro, High Point, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Lexington, Thomasville, Asheboro, Archdale, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, and Knightdale 322 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Portions of central North Carolina. * WHEN...Until 8 AM EST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ042-076>078-281300- /O.CON.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Johnston-Lee-Harnett-Wayne- Including the cities of Smithfield, Selma, Clayton, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, and Goldsboro 322 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Wayne, Lee, Harnett and Johnston Counties. * WHEN...Until 8 AM EST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$
678 WWUS42 KRAH 281128 AAA WSWRAH URGENT - WINTER WEATHER MESSAGE...UPDATED National Weather Service Raleigh NC 628 AM EST Thu Jan 28 2021 ...Winter weather advisory in effect until mid morning for portions of central North Carolina... .Light snow persists over portions of central and eastern North Carolina this morning. NCZ021-022-038-039-281230- /O.CAN.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Forsyth-Guilford-Davidson-Randolph- Including the cities of Winston-Salem, Greensboro, High Point, Lexington, Thomasville, Asheboro, and Archdale 628 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... The snow has tapered off across this area. Some snow accumulation remains on the ground, so motorists should use extra caution this morning. $$ NCZ007>011-281300- /O.CON.KRAH.WS.W.0002.000000T0000Z-210128T1300Z/ Person-Granville-Vance-Warren-Halifax- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Roanoke Rapids, Enfield, and Scotland Neck 628 AM EST Thu Jan 28 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Heavy snow. Additional snow accumulations of up to one inch. * WHERE...Warren, Halifax, Vance, Granville and Person Counties. * WHEN...Until 8 AM EST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ026>028-043-281300- /O.CON.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Franklin-Nash-Edgecombe-Wilson- Including the cities of Louisburg, Franklinton, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, and Wilson 628 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Snow. Additional snow accumulations under one inch. * WHERE...Nash, Franklin, Edgecombe and Wilson Counties. * WHEN...Until 8 AM EST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ023>025-040-041-281300- /O.CON.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Alamance-Orange-Durham-Chatham-Wake- Including the cities of Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, and Knightdale 628 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Snow. Additional snow accumulations under one inch. * WHERE...Durham, Orange, Alamance, Wake and Chatham Counties. * WHEN...Until 8 AM EST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$ NCZ042-076>078-281300- /O.CON.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Johnston-Lee-Harnett-Wayne- Including the cities of Smithfield, Selma, Clayton, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, and Goldsboro 628 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Snow. Additional snow accumulations under one inch. * WHERE...Wayne, Lee, Harnett and Johnston Counties. * WHEN...Until 8 AM EST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for North Carolina can be obtained by visiting DriveNC.gov. && $$
055 WWUS42 KRAH 281304 WSWRAH URGENT - WINTER WEATHER MESSAGE National Weather Service Raleigh NC 804 AM EST Thu Jan 28 2021 ...Wintry Precipitation Ending across Central NC... .The winter storm that produced an area of wintry precipitation across central North Carolina is moving away and the wintry precipitation is ending. NCZ007>011-281415- /O.EXP.KRAH.WS.W.0002.000000T0000Z-210128T1300Z/ Person-Granville-Vance-Warren-Halifax- Including the cities of Roxboro, Oxford, Creedmoor, Henderson, Kittrell, Warrenton, Norlina, Roanoke Rapids, Enfield, and Scotland Neck 804 AM EST Thu Jan 28 2021 ...WINTER STORM WARNING WILL EXPIRE AT 8 AM EST THIS MORNING... Wintry precipitation will end as as few flurries through mid morning. Snow accumulations across the warning area ranged between 2 and 4 inches. Use caution when traveling this morning as roads have snow and slush accumulation. $$ NCZ026>028-043-281415- /O.EXP.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Franklin-Nash-Edgecombe-Wilson- Including the cities of Louisburg, Franklinton, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, and Wilson 804 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 8 AM EST THIS MORNING... Wintry precipitation will end as as few flurries through mid morning. Snow accumulations across the area ranged between 2 and 3 inches. Use caution when traveling this morning as roads have snow and slush accumulations. $$ NCZ023>025-040-041-281415- /O.EXP.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Alamance-Orange-Durham-Chatham-Wake- Including the cities of Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, and Knightdale 804 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 8 AM EST THIS MORNING... Wintry precipitation will end as as few flurries through mid morning. Snow accumulations across the area ranged from a coating up to 2 inches. Use caution when traveling this morning as some roads may be slippery with an accumulation of slush. $$ NCZ042-076>078-281415- /O.EXP.KRAH.WW.Y.0002.000000T0000Z-210128T1300Z/ Johnston-Lee-Harnett-Wayne- Including the cities of Smithfield, Selma, Clayton, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, and Goldsboro 804 AM EST Thu Jan 28 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 8 AM EST THIS MORNING... Wintry precipitation will end as as few flurries through mid morning. Snow accumulations across the area ranged from a coating up to 2 inches. Use caution when traveling this morning as some roads may be slippery with an accumulation of slush. $$
What forecasters said that day
The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Raleigh, NC wrote its last area forecast discussion before this winter weather advisory went out at Jan 27, 3:05 AM EST, 13 minutes earlier.
Area forecast discussion, Jan 27, 3:05 AM EST, 13 minutes before
AREA FORECAST DISCUSSION National Weather Service Raleigh NC 305 AM EST Wed Jan 27 2021 .SYNOPSIS... A weak cold front will settle just to our south, across South Carolina and southeast North Carolina early this morning. Surface low pressure will track along the front today, with a stronger low to follow this evening through tonight, as a strong upper level disturbance crosses the region. This storm system will exit the Carolina coast Thursday morning, followed by cool high pressure building in from the north for Thursday afternoon through Saturday. Another potent storm system will cross the region early Sunday through Monday. && .NEAR TERM /TODAY THROUGH TONIGHT/... As of 300 AM Wednesday... ...Winter weather advisory over north central NC for tonight... Low levels are beginning to dry out from the NNW as slightly lower surface dewpoints and drier air just off the ground advects into north central NC, so any dense fog this morning should be isolated for the next few hours, with an improving trend as the surface cold front continues to settle just to our SE this morning. The expansive cold/dense high centered over SE Manitoba will attempt to build in today but should be initially hindered by the mountains, thus expect above normal low-level thicknesses this morning followed by a gradual fall this afternoon as the cooler air starts to breach the Appalachians. The rain area stretching from central AL across central and northern GA and upstate SC will continue to spread NE this morning, mainly impacting our southern two-thirds, and will have the highest pops (likely to categorical) here, with lower pops across the N (sub-15% near the VA border trending to good chance to likely near Hwy 64) where the lowest 3km will be drier. Stratocu and overcast mid clouds, however, will continue to spread across all of central NC, and this with the precip will hold high temps down in the upper 40s to lower 50s. Pops should drop a bit late in the afternoon, with a brief lull in forcing for ascent ahead of the mid level shortwave trough, so will show a dip in pops between 21z and 01z. The real action will start mid-late evening as the potent shortwave trough crosses the Mid South, on track to shift E across VA/NC overnight. During this time frame is when the cold/dense air mass finally breaks through the central Appalachians and starts to spill down through VA toward NC with a strengthening low level flow from the NNE capped by strengthening SW flow at 850 mb across southern NC. A concentrated surface low will track ENE along the front, crossing the Carolinas this evening through midnight before pushing offshore and intensifying overnight off SC. Forcing for ascent will be maximized in the mid levels with strong DPVA and 150-200 m height falls. While this should be a fairly quick shot of lift, running roughly from late evening through daybreak and peaking 1-3 hours after midnight, it will coincide with a cooling of the column, which in turn will likely be augmented by bursts of heavier precip rates. With minor differences, models remain in fairly good agreement in showing this cooling saturated column below -20C, favoring a trend toward a rain/snow mix then all snow after midnight from NW to SE. As the surface to 850 lows are projected to strengthen quickly late tonight just offshore, the threat for banded precip, likely in the form of snow by that point, increases. Model QPF has been trending a bit higher in recent runs, and factoring in the cooling column through both the low and mid levels, we're now looking at the potential for over an inch over portions of the northern Piedmont of NC, and an increasing chance for at least a dusting to half inch over all but the far southern portion of the CWA. Will issue a winter weather advisory for roughly areas along and N of Hwy 64 from midnight to 8 am for a high potential of 0.5-1.5" snow accumulation. Accumulation will be mostly on grassy surfaces, given soil temps in the 40s, however any quick burst will lead to accumulations on the pavement as well. And given the potential for banded precip, islands of higher totals across the far N Piedmont can't be ruled out. Expect lows tonight from the upper 20s to mid 30s N to S. -GIH && .SHORT TERM /THURSDAY/... As of 258 PM Tuesday... To be updated shortly. && .LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/... As of 305 AM Wednesday... The first 36 hours may be the most quiet weather period in the 7 day forecast. All clouds from tonight/Thursday's system will have departed to the east by sunset, clear skies will continue Thursday night and Friday, and just some high cloud cover will move in late Friday night as high pressure dominates much of the eastern United States. However, northwesterly flow will keep temperatures on the cool side, with a hard freeze expected both Thursday night and Friday night with lows in the 20s and highs in the 40s on Friday. Despite the breezy conditions on Thursday, any leftover precipitation on roadways and sidewalks that does not evaporate during the daytime will certainly freeze Thursday night and Friday night, resulting in potentially hazardous travel overnight and into the morning hours. Cloud cover will increase Saturday although conditions will remain dry. The system that will arrive for the second half of the weekend is just making its way onshore along the Pacific coastline, so it should be better sampled in the next couple of days. The last four runs of the ECMWF have shown low pressure develop in the central Plains Saturday, fade out as it moves into the Ohio Valley, and redevelop along the Carolina coastline with Miller B cyclogenesis. While the 26/00Z run of the GFS showed the Plains low simply moving east-northeast with little change in intensity, the 26/18Z and 27/00Z runs of the GFS are moving in the direction of the ECMWF, although its coastal low is weaker than that of the ECMWF. While the Miller B scenario is still far from certain, it appears more likely now that the models are beginning to come into better agreement. This will allow for most precipitation to fall Sunday and Sunday evening, with wraparound precipitation primarily northeast of Raleigh through Monday night with the coastal low making slow progress up the coast. With the colder antecedent conditions leading up to this event, any wintry precipitation that may fall would be much more likely to stick than with our first storm with colder soil temperatures developing. Temperatures will remain below normal through the extended forecast. && .AVIATION /06Z WEDNESDAY THROUGH SUNDAY/... As of 1255 AM Wednesday... LIFR/VLIFR conditions continue over central NC and will do so for the next few hours, however cigs have broken up at INT/GSO in the last hour, with MVFR vsbys in fog. High resolution models suggest that the very low stratus and fog will improve prior to daybreak, with most locations trending toward MVFR or even VFR after 10z. But sct low clouds will persist in the morning, and could go broken at times. Otherwise, we should see generally VFR conditions after 14z, except at FAY which will see periods of rain and mostly MVFR conditions today. Rain chances will be less, but not zero, at the remaining sites today. After 21z, we expect a short break in the rain chances areawide with winds increasing from the NE near 10 kts gusting to 15-20 kts, lasting through this evening. Rain, with MVFR conditions, will return from the west late in the period. Looking beyond 06z Thu, poor aviation conditions, likely IFR/LIFR, are expected areawide 06z-12z with rain trending to a mix then mostly snow at all but FAY (which should remain as mostly rain). Quick west-to-east improvement to VFR is expected 12z-16z Thu, with surface winds shifting to be from the northwest. VFR will hold through Sat evening, followed by a trend to rainy MVFR late Sat night through Sun with the next storm system. -GIH && .RAH WATCHES/WARNINGS/ADVISORIES... Winter Weather Advisory from midnight tonight to 8 AM EST Thursday for NCZ007>011-021>028-038>041-043. && SYNOPSIS...Hartfield NEAR TERM...Hartfield SHORT TERM... LONG TERM...Green AVIATION...Hartfield
Hazardous weather outlook, Jan 26, 8:30 PM EST, 6 hours 48 minutes before
Hazardous Weather Outlook National Weather Service Raleigh NC 830 PM EST Tue Jan 26 2021 NCZ007>011-021>028-038>041-043-280130- Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance- Orange-Durham-Franklin-Nash-Edgecombe-Davidson-Randolph-Chatham-Wake- Wilson- 830 PM EST Tue Jan 26 2021 This Hazardous Weather Outlook is for central North Carolina. .DAY ONE...Tonight. Areas of dense fog, with visibilities less than 50 yards are possible overnight. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Rain is expected to change to a rain and snow mix, or mostly snow Wednesday night, mainly along and north of Highway 64. A dusting of snow on grassy areas, to as much as one inch of snow accumulation, is possible before the storm exits our area Thursday morning. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. NCZ042-073>078-083>086-088-089-280130- Johnston-Stanly-Montgomery-Moore-Lee-Harnett-Wayne-Anson-Richmond- Scotland-Hoke-Cumberland-Sampson- 830 PM EST Tue Jan 26 2021 This Hazardous Weather Outlook is for central North Carolina. .DAY ONE...Tonight. Areas of dense fog are possible overnight. Some visibilities may fall below 50 yards at times. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Jan 26, 9:19 PM EST, 5 hours 59 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RALEIGH NC 919 PM EST Tue Jan 26 2021 NCZ007>010-021>026-038>042-073>077-083>086-088-089-270430- PERSON-GRANVILLE-VANCE-WARREN-FORSYTH-GUILFORD-ALAMANCE-ORANGE- DURHAM-FRANKLIN-DAVIDSON-RANDOLPH-CHATHAM-WAKE-JOHNSTON-STANLY- MONTGOMERY-MOORE-LEE-HARNETT-ANSON-RICHMOND-SCOTLAND-HOKE- CUMBERLAND-SAMPSON- INCLUDING THE CITIES OF ROXBORO, OXFORD, CREEDMOOR, HENDERSON, KITTRELL, WARRENTON, NORLINA, WINSTON-SALEM, GREENSBORO, HIGH POINT, BURLINGTON, GRAHAM, MEBANE, HILLSBOROUGH, CHAPEL HILL, CARRBORO, DURHAM, ROUGEMONT, LOUISBURG, FRANKLINTON, LEXINGTON, THOMASVILLE, ASHEBORO, ARCHDALE, SILER CITY, PITTSBORO, RALEIGH, CARY, APEX, WAKE FOREST, KNIGHTDALE, SMITHFIELD, SELMA, CLAYTON, ALBEMARLE, TROY, SOUTHERN PINES, PINEHURST, ABERDEEN, CARTHAGE, SANFORD, LILLINGTON, ANGIER, BUIES CREEK, ERWIN, DUNN, WADESBORO, POLKTON, ROCKINGHAM, ELLERBE, LAURINBURG, CAMP MACKALL, WAGRAM, RAEFORD, FAYETTEVILLE, SPRING LAKE, HOPE MILLS, CLINTON, AND ROSEBORO 919 PM EST Tue Jan 26 2021 ...Patchy dense fog is expected through 400 AM... Areas of fog, some locally dense with visibilities less than 50 yards can be expected through 400 AM. There may be some improvements as a weak cold front approaches from the mountains later tonight. Otherwise, motorists should be prepared for locally dense fog to continue to be around through the overnight period.
Nearby
Winter Weather Advisories in North Carolina, 2021Every winter weather advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.