Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Raleigh, NC

June 11, 2021Granville County, Vance County, North Carolina

NWS Raleigh, NC issued this special weather statement at Jun 11, 2021, 4:32 PM EDT for Granville County, Vance County, North Carolina. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 11, 2021, 4:32 PM EDT (20:32 UTC)
Expired
Jun 11, 2021, 5:30 PM EDT
In force
58 min
Issued by
NWS Raleigh, NC

Counties Granville County, NC, Vance County, NC

The radar

The Raleigh/Durham radar (KRAX), 70 km from the middle of the area, began a volume at 20:32 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 nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.5 hours before the alert went out and 127 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2021-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 329 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2021-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
329 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
871 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 11, 3:38 PM EDT, 54 minutes earlier.

Area forecast discussion, Jun 11, 3:38 PM EDT, 54 minutes before
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Hazardous weather outlook, Jun 11, 6:11 AM EDT, 10 hours 21 minutes before
Hazardous Weather Outlook
National Weather Service Raleigh NC
611 AM EDT Fri Jun 11 2021

NCZ007>011-026>028-043-121200-
Person-Granville-Vance-Warren-Halifax-Franklin-Nash-Edgecombe-Wilson-
611 AM EDT Fri Jun 11 2021

...FLASH FLOOD WATCH IN EFFECT FROM NOON EDT TODAY THROUGH THIS
EVENING...

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Today 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.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

NCZ021>025-038>042-073>078-083>086-088-089-121200-
Forsyth-Guilford-Alamance-Orange-Durham-Davidson-Randolph-Chatham-
Wake-Johnston-Stanly-Montgomery-Moore-Lee-Harnett-Wayne-Anson-
Richmond-Scotland-Hoke-Cumberland-Sampson-
611 AM EDT Fri Jun 11 2021

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Today and tonight.

Showers and thunderstorms with heavy rain may result in flooding of
urban and poor drainage areas this afternoon and evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jun 11, 1:39 PM EDT, 2 hours 53 minutes before
Special Weather Statement
National Weather Service Raleigh NC
139 PM EDT Fri Jun 11 2021

NCZ021-022-111830-
Guilford NC-Forsyth NC-
139 PM EDT Fri Jun 11 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN FORSYTH AND
NORTHWESTERN GUILFORD COUNTIES UNTIL 230 PM EDT...

At 139 PM EDT, Doppler radar was tracking a line of strong
thunderstorms along a line extending from Walnut Cove to Enon.
Movement was east at 20 mph.

Wind gusts up to 40 mph will be possible with these storms.

Locations impacted include...
Winston-Salem, Lewisville, Stokesdale, Walkertown, Rural Hall,
Pfafftown, Stanleyville, Belews Creek and Belews Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3611 8050 3612 8046 3614 8044 3620 8045
      3626 8031 3625 7986 3605 8036 3609 8052
TIME...MOT...LOC 1739Z 275DEG 19KT 3631 8013 3615 8050

JJT
Special weather statement, Jun 11, 2:03 PM EDT, 2 hours 29 minutes before
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Special weather statement, Jun 11, 3:58 PM EDT, 34 minutes before
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Special weather statement, Jun 11, 4:32 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 8:08 PM EDTSpecial Weather StatementRAHDavidson, Guilford, Randolph67 min
Jun 10, 8:56 PM EDTAreal Flood AdvisoryRAHDavidson, Randolph78 min
Jun 10, 9:11 PM EDTFlash Flood Warning Considerable damage threatRAHDavidson, Randolph3 hr
Jun 10, 9:12 PM EDTSpecial Weather StatementRAHRandolph63 min
Jun 10, 9:49 PM EDTSpecial Weather StatementRAHDuplin26 min
Jun 11, 1:21 PM EDTAreal Flood AdvisoryRAHForsyth, Guilford3 hr
Jun 11, 1:39 PM EDTSpecial Weather StatementRAHForsyth51 min
Jun 11, 2:03 PM EDTSpecial Weather StatementRAHAlamance57 min
Jun 11, 2:50 PM EDTAreal Flood AdvisoryRAHForsyth3 hr
Jun 11, 3:58 PM EDTSpecial Weather StatementRAHJohnston47 min

Nearby

Special Weather Statements in North Carolina, 2021Every special weather statement 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; radar from the NEXRAD Level II archive.