Alert archive / North Carolina / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 225, NWS Raleigh, NC

October 11, 20185 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Oct 11, 2018, 3:56 PM EDT for 5 counties in North Carolina. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 11, 2018, 3:56 PM EDT (19:56 UTC)
Expired: Oct 11, 2018, 5:00 PM EDT
In force: 64 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Alamance County, NC, Chatham County, NC, Guilford County, NC, Orange County, NC, Randolph County, NC

The radar

The Raleigh/Durham radar (KRAX), 93 km from the middle of the area, began a volume at 19:59 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 11, 9:58 AM EDT	Tornado Watch	SPC	13 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.9 hours before the alert went out and 42 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 546 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 300 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Oct 11, 3:55 PM EDT, 1 minute earlier.

Area forecast discussion, Oct 11, 3:55 PM EDT, 1 minute before

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Hazardous weather outlook, Oct 11, 2:47 PM EDT, 1 hour 9 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Raleigh NC
247 PM EDT Thu Oct 11 2018

NCZ038>040-075>077-086-088-121100-
Davidson-Randolph-Chatham-Moore-Lee-Harnett-Hoke-Cumberland-
247 PM EDT Thu Oct 11 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...TROPICAL STORM WARNING IN EFFECT...

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Tropical Storm Warning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tropical Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters are encouraged to report any observations of
flooding, wind gusts over 40 mph, or downed trees or other damage
immediately to the National Weather Service in Raleigh.

NCZ073-074-083>085-121100-
Stanly-Montgomery-Anson-Richmond-Scotland-
247 PM EDT Thu Oct 11 2018

...TROPICAL STORM WARNING IN EFFECT...

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tropical Storm Warning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tropical Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters are encouraged to report any observations of
flooding, wind gusts over 40 mph, or downed trees or other damage
immediately to the National Weather Service in Raleigh.

NCZ007>011-021>028-041>043-078-089-121100-
Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance-
Orange-Durham-Franklin-Nash-Edgecombe-Wake-Johnston-Wilson-Wayne-
Sampson-
247 PM EDT Thu Oct 11 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...TORNADO WATCH 409 IN EFFECT UNTIL 9 PM EDT THIS EVENING...
...TROPICAL STORM WARNING IN EFFECT...

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.
   Flash Flood Watch.
   Tropical Storm Warning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tropical Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters are encouraged to report any observations of
flooding, wind gusts over 40 mph, or downed trees or other damage
immediately to the National Weather Service in Raleigh.

In the hours before

Local storm report, Oct 11, 3:11 PM EDT, 45 minutes before

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Local storm report, Oct 11, 3:20 PM EDT, 36 minutes before

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Local storm report, Oct 11, 3:35 PM EDT, 21 minutes before

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Local storm report, Oct 11, 3:37 PM EDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
337 PM EDT THU OCT 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     TROPICAL STORM   1 E WINSTON-SALEM       36.10N 80.24W
10/11/2018                   FORSYTH            NC   EMERGENCY MNGR

            NUMEROUS TREES DOWN THROUGHOUT FORSYTH
            COUNTY.

&&

JFD

Local storm report, Oct 11, 3:46 PM EDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
346 PM EDT THU OCT 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0338 PM     TROPICAL STORM   4 WNW SMITHFIELD        35.53N 78.41W
10/11/2018                   JOHNSTON           NC   FIRE DEPT/RESCUE

            SMITHFIELD FD RESPONDING TO DOWNED TREE ON
            SWIFT CREEK RD NEAR CLEVELAND RD. LANE
            BLOCKED.

&&

JFD

Local storm report, Oct 11, 3:52 PM EDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
352 PM EDT THU OCT 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0306 PM     TROPICAL STORM   3 ESE BETHEL HILL       36.49N 78.83W
10/11/2018                   PERSON             NC   EMERGENCY MNGR

            ABOUT HALF A DOZEN REPORT OF TREES DOWN
            COUNTYWIDE, INCLUDING AT 861 TATUM RD,
            BOWMANTOWN RD/BUCK ST, 1333 HURDLE MILLS RD,
            AND 1559 SURL MT. TIRZAH RD.

&&

JFD

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 10, 10:31 PM EDT	River Flood Warning	RAH	Anson, Stanly	30 hr
Oct 10, 10:33 PM EDT	River Flood Warning	RAH	Alamance	60 hr
Oct 10, 10:33 PM EDT	River Flood Warning	RAH	Chatham	63 hr
Oct 10, 10:41 PM EDT	River Flood Warning	RAH	Davidson, Davie	70 hr
Oct 11, 9:16 AM EDT	Flash Flood Warning	RAH	Davidson, Forsyth, Guilford, Randolph	21 hr
Oct 11, 9:46 AM EDT	Areal Flood Advisory	RAH	Anson, Hoke, Montgomery, Moore, Richmond, Scotland and 1 more	6 hr
Oct 11, 11:17 AM EDT	Areal Flood Advisory	RAH	Alamance, Chatham, Cumberland, Durham, Harnett, Lee and 2 more	6 hr
Oct 11, 12:00 PM EDT	River Flood Warning	RAH	Chatham, Lee	18 hr
Oct 11, 12:25 PM EDT	Flash Flood Warning	RAH	Alamance, Chatham, Durham, Lee, Orange, Wake	9 hr
Oct 11, 1:21 PM EDT	Flash Flood Warning	RAH	Granville, Person	12 hr
Oct 11, 1:25 PM EDT	Flash Flood Warning	RAH	Cumberland, Harnett, Johnston, Moore	5 hr
Oct 11, 2:12 PM EDT	Areal Flood Advisory	RAH	Franklin, Halifax, Nash, Vance, Warren, Wilson	6 hr
Oct 11, 3:10 PM EDT	Special Weather Statement	RAH	Guilford, Randolph	35 min
Oct 11, 4:16 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Person	59 min
Oct 11, 4:43 PM EDT	Severe Thunderstorm Warning	RAH	Chatham, Franklin, Granville, Vance, Wake	92 min
Oct 11, 4:57 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Harnett, Hoke, Lee, Moore, Richmond and 1 more	93 min
Oct 11, 5:05 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Sampson, Wayne, Wilson	85 min
Oct 11, 5:22 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Franklin, Halifax, Nash, Warren	83 min
Oct 11, 6:14 PM EDT	Special Weather Statement	RAH	Durham, Franklin, Granville, Vance	61 min
Oct 11, 6:30 PM EDT	Special Weather Statement	RAH	Sampson, Wayne, Wilson	60 min
Oct 11, 6:39 PM EDT	Special Weather Statement	RAH	Halifax, Nash, Warren	36 min
Oct 11, 7:29 PM EDT	Flash Flood Warning	RAH	Davidson, Randolph	25 hr
Oct 11, 7:35 PM EDT	Special Weather Statement	RAH	Franklin, Granville, Vance, Warren	55 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2018 Every severe thunderstorm warning in 2018

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; radar from the NEXRAD Level II archive.