Alert archive / North Carolina / Tornado Warnings in 2011
Tornado Warning 36, NWS Raleigh, NC
NWS Raleigh, NC issued this tornado warning at Apr 27, 2011, 6:17 PM EDT for Forsyth County, North Carolina. It was in force for 43 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
- Apr 27, 2011, 6:17 PM EDT (22:17 UTC)
- Expired
- Apr 27, 2011, 7:00 PM EDT
- In force
- 43 min
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
County Forsyth County, NC
The radar
The Roanoke radar (KFCX), 98 km from the middle of the area, began a volume at 22:18 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 |
|---|---|---|---|
| Apr 27, 1:23 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 27, 6:15 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.3 hours before the alert went out and 37 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
- 446 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 564 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
404
WFUS52 KRAH 272217
TORRAH
NCC067-272300-
/O.NEW.KRAH.TO.W.0036.110427T2217Z-110427T2300Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
ISSUED BY NATIONAL WEATHER SERVICE BLACKSBURG VA
617 PM EDT WED APR 27 2011
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
* TORNADO WARNING FOR...
FORSYTH COUNTY IN CENTRAL NORTH CAROLINA
* UNTIL 700 PM EDT.
* AT 613 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR CLEMMONS...
OR 11 MILES NORTHEAST OF MOCKSVILLE...MOVING NORTHEAST AT 30 MPH.
* LOCATIONS IMPACTED INCLUDE...
CLEMMONS...
WINSTON-SALEM...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
PLEASE RELAY SEVERE WEATHER REPORTS TO THE NATIONAL WEATHER SERVICE
BY CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM EDT THURSDAY MORNING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3626 8029 3626 8019 3622 8005 3606 8027
3600 8042 3604 8047 3604 8050
TIME...MOT...LOC 2217Z 220DEG 26KT 3604 8042
$$
WP3 follow-up statements
685
WWUS52 KRAH 272230
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
ISSUED BY NATIONAL WEATHER SERVICE BLACKSBURG VA
630 PM EDT WED APR 27 2011
NCC067-272300-
/O.CON.KRAH.TO.W.0036.000000T0000Z-110427T2300Z/
FORSYTH NC-
630 PM EDT WED APR 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR FORSYTH
COUNTY...
AT 626 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR LEWISVILLE...OR
NEAR WINSTON-SALEM...MOVING NORTHEAST AT 35 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PFAFFTOWN...STANLEYVILLE...RURAL HALL AND WALKERTOWN.
IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM EDT THURSDAY MORNING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3626 8029 3626 8019 3622 8005 3606 8027
3600 8042 3604 8047 3604 8050
TIME...MOT...LOC 2230Z 224DEG 31KT 3613 8032
$$
WP014
WWUS52 KRAH 272251
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
ISSUED BY NATIONAL WEATHER SERVICE BLACKSBURG VA
651 PM EDT WED APR 27 2011
NCC067-272300-
/O.CON.KRAH.TO.W.0036.000000T0000Z-110427T2300Z/
FORSYTH NC-
651 PM EDT WED APR 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR NORTHERN
FORSYTH COUNTY...
AT 648 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR PFAFFTOWN...OR
NEAR WINSTON-SALEM...MOVING NORTHEAST AT 30 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
STANLEYVILLE...RURAL HALL AND WALKERTOWN.
IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
DESTRUCTIVE STRAIGHT LINE WINDS.
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM EDT THURSDAY MORNING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3609 8028 3611 8037 3612 8040 3614 8040
3626 8029 3626 8019 3622 8005
TIME...MOT...LOC 2251Z 230DEG 27KT 3614 8031
$$
WP541
WWUS52 KRAH 272257
SVSRAH
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
ISSUED BY NATIONAL WEATHER SERVICE BLACKSBURG VA
657 PM EDT WED APR 27 2011
NCC067-272307-
/O.EXP.KRAH.TO.W.0036.000000T0000Z-110427T2300Z/
FORSYTH NC-
657 PM EDT WED APR 27 2011
...THE TORNADO WARNING FOR NORTHERN FORSYTH COUNTY EXPIRES AT 700 PM
EDT...
THE THUNDERSTORM IS EXITING THE COUNTY AND THE WARNING WILL BE
ALLOWED TO EXPIRE.
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM EDT THURSDAY MORNING
FOR CENTRAL NORTH CAROLINA.
LAT...LON 3609 8028 3611 8037 3612 8040 3614 8040
3626 8029 3626 8019 3622 8005
TIME...MOT...LOC 2257Z 230DEG 27KT 3617 8027
$$
WPThe office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 1:29 PM EDT | Special Weather Statement | RAH | Durham, Franklin, Granville, Vance, Wake | 61 min |
| Apr 27, 1:36 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Granville, Person, Vance, Warren | 54 min |
| Apr 27, 1:41 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Franklin, Granville, Vance, Wake, Warren | 64 min |
| Apr 27, 1:48 PM EDT | Severe Thunderstorm Warning | RAH | Davidson, Forsyth, Guilford | 57 min |
| Apr 27, 2:01 PM EDT | Severe Thunderstorm Warning | RAH | Edgecombe, Halifax, Nash | 59 min |
| Apr 27, 2:12 PM EDT | Severe Thunderstorm Warning | RAH | Edgecombe, Halifax, Nash, Wayne, Wilson | 42 min |
| Apr 27, 5:43 PM EDT | Severe Thunderstorm Warning | RAH | Davidson, Forsyth, Guilford, Randolph | 62 min |
| Apr 27, 6:06 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Granville, Orange, Person | 32 min |
| Apr 27, 6:19 PM EDT | Tornado Warning | RAH | Davidson, Forsyth, Guilford | 41 min |
| Apr 27, 7:06 PM EDT | Special Weather Statement | RAH | Guilford | 39 min |
Nearby
Tornado Warnings in North Carolina, 2011Every tornado warning in 2011Tornadoes in 2011
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.