Alert archive / North Carolina / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 784
The Storm Prediction Center issued this severe thunderstorm watch at Jul 31, 2008, 5:02 PM EDT for 18 counties in North Carolina; Darlington County, Dillon County, Marlboro County, South Carolina. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2008, 5:02 PM EDT (21:02 UTC)
- Expired
- Jul 31, 2008, 8:54 PM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 21 counties
Beaufort County, NC, Bladen County, NC, Columbus County, NC, Craven County, NC, Dare County, NC, Duplin County, NC, Greene County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Pitt County, NC, Robeson County, NC, Tyrrell County, NC, Washington County, NC, Darlington County, SC, Dillon County, SC, Marlboro County, SC
The radar
The Morehead City radar (KMHX), 92 km from the middle of the area, began a volume at 21:04 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:25 PM EDT | Severe Thunderstorm Warning | MHX | Tyrrell, Washington | 65 min |
| Jul 31, 5:29 PM EDT | Severe Thunderstorm Warning | MHX | Dare | 31 min |
| Jul 31, 5:58 PM EDT | Severe Thunderstorm Warning | ILM | Darlington, Dillon, Marlboro | 47 min |
| Jul 31, 6:04 PM EDT | Severe Thunderstorm Warning | ILM | Bladen, Robeson | 41 min |
| Jul 31, 6:05 PM EDT | Severe Thunderstorm Warning | MHX | Beaufort, Craven | 55 min |
| Jul 31, 6:22 PM EDT | Severe Thunderstorm Warning | ILM | Bladen | 38 min |
| Jul 31, 6:24 PM EDT | Severe Thunderstorm Warning | MHX | Dare, Hyde | 51 min |
| Jul 31, 6:30 PM EDT | Severe Thunderstorm Warning | MHX | Beaufort, Hyde | 45 min |
| Jul 31, 6:32 PM EDT | Severe Thunderstorm Warning | ILM | Robeson | 28 min |
| Jul 31, 6:45 PM EDT | Severe Thunderstorm Warning | MHX | Duplin | 45 min |
| Jul 31, 6:47 PM EDT | Severe Thunderstorm Warning | ILM | Bladen, Columbus, Robeson | 43 min |
| Jul 31, 7:06 PM EDT | Severe Thunderstorm Warning | MHX | Beaufort, Pamlico | 39 min |
| Jul 31, 7:20 PM EDT | Severe Thunderstorm Warning | MHX | Craven, Duplin, Jones, Onslow, Pamlico | 55 min |
| Jul 31, 7:38 PM EDT | Severe Thunderstorm Warning | ILM | Brunswick, Columbus | 52 min |
| Jul 31, 8:06 PM EDT | Severe Thunderstorm Warning | MHX | Carteret, Craven, Onslow | 39 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Newport, NC (KMHX), launched 12:00Z, 9.0 hours before the alert went out and 91 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
- 1212 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 993 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 312102
SEL4
SPC WW 312102
NCZ000-SCZ000-CWZ000-010200-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 784
NWS STORM PREDICTION CENTER NORMAN OK
505 PM EDT THU JUL 31 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
EASTERN NORTH CAROLINA
EXTREME NORTHEAST SOUTH CAROLINA
COASTAL WATERS
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 505 PM UNTIL
1000 PM EDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45
STATUTE MILES EITHER SIDE OF A LINE FROM 50 MILES SOUTH SOUTHWEST
OF FAYETTEVILLE NORTH CAROLINA TO 40 MILES NORTH OF CAPE HATTERAS
NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
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 782...WW 783...
DISCUSSION...MULTICELL STORM CLUSTERS WILL LIKELY CONTINUE TO SPREAD
EWD ACROSS THE COASTAL PLAIN OF ERN NC AND NE SC. STRONG
INSTABILITY AND STORM MERGERS WILL SUPPORT A THREAT FOR DAMAGING
DOWNBURSTS AND MARGINALLY SEVERE HAIL...WITH THE MORE ORGANIZED
STORMS EXPECTED ACROSS NC IN PROXIMITY TO THE STRONGER MID LEVEL
FLOW.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 27020.
...THOMPSONSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 1:24 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Cabarrus, Caswell, Catawba, Chatham and 19 more | 66 min |
| Jul 31, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Alexander, Anson, Bertie, Buncombe, Burke and 64 more | 5 hr |
| Jul 31, 4:27 PM EDT | Mesoscale Discussion | SPC | Anson, Beaufort, Bertie, Bladen, Camden, Chowan and 41 more | 63 min |
| Jul 31, 7:08 PM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Carteret, Columbus, Craven, Dare and 8 more | 67 min |
Nearby
Severe Thunderstorm Watches in North Carolina, 2008Severe Thunderstorm Watches in South Carolina, 2008Every severe thunderstorm watch in 2008
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.