Alert archive / North Carolina / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 64, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 7, 1999, 4:01 PM EDT for Rockingham County, North Carolina. It was in force for 34 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 7, 1999, 4:01 PM EDT (20:01 UTC)
- Expired
- Jul 7, 1999, 4:35 PM EDT
- In force
- 34 min
- Issued by
- NWS Blacksburg, VA
- Area
- Whole counties
County Rockingham County, NC
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 4:15 PM EDT | Hail 0.75 | Madison, NC | |
| Jul 7, 4:20 PM EDT | Thunderstorm Wind | Madison, NC | |
| Jul 7, 4:25 PM EDT | Hail 0.75 | Mayodan, NC |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.0 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
- 683 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 1339 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Blacksburg, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 7, 2:40 PM EDT, 1 hour 21 minutes earlier.
Area forecast discussion, Jul 7, 2:40 PM EDT, 1 hour 21 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BLACKSBURG VA 240 PM EDT WED JUL 7 1999 LINE OF SCT TSRA FLIRTING WITH YADKIN CO. BUT SEEMS LIKE SRN COUNTIES WL STAY DRY FOR NOW. CDFNT WAS FM PA THRU AR AND WL CONT TO MOV SE. ETA STILL THE SLOWER MODEL AND HAD FNT INTO CWA BY 18Z THEN WASHES IT OUT BY 06Z WITH JUST A TROF LEFT FM CNTRL VA INTO GA THRU THUR. WL MAINTAIN POPS IN OUR SE COUTNTIES BUT WILL NOT LIMIT TO THIS AFTN AS CONVECTION ALONG THE BNDRY HAS BEEN FIRING BY LATE MORNING LAST COUPLE OF DAYS. WL ALSO EXPAND CHC POPS INTO ROA...N OF LYN AND INTO NEW RIVER VALLEY...CLOSER TO WHERE 8H FNT HANGS UP AND WHERE MODELS INDICATED THE BEST UVV. BUT STIL THINK BEST CHC FOR TSRA WL BE THIS AFTN IN OUT SE COUTNIES IN THE RGN OF SFC CONVERGENCE...HIGHEST THETA-E AND MUCH HIGHER PWINS AND SFC DEW POINTS...ESPECIALLY S OF THE FNT. LIKE PAST FEW RUNS...7H AND 8H TEMPS DROP A COUPLE DEGREES BY THUR...SO CAP SHUD NOT BE AS STRONG. SFC WNDS NEVER COME ARND ACRS S CNTRL VA. BUT REST OF FA SHUD SEE DRIER AMS ON THUR. REMAINING TROF SHUD BE JUST FAR ENOUGH AWAY FM CWA TO KEEP POPS OUT OF THE S ON THUR. AREA OF BKN/OVC SC THAT HAS BEEN FORMING EACH DAY ALONG AND AHEAD OF FNT SHUD LEAD TO SLIGHTLY COOLER HIGH TEMPS TDY. LIKE WARMER FWC NUMBERS FOR TDY...FAN LOOKS TOO LOW. EXPECT DAN AND MTV TO HAVE LOW 70S DEW POINTS TDY WHICH GIVES THEM AN AFTN HEAT INDEX FM 102 TO 108. WL ISSUE HEAT ADV ONLY FOR THIS AREA FOR THIS AFTN. NGM IS TOO AGRESSIVE WITH LOWERING DEW POINTS N OF THE FNT TNGT SO WL STAY ABV FWC LOWS. .RNK... VA...NONE NC...NONE. WV...NONE. AMS
In the hours before
Special weather statement, Jul 7, 12:03 PM EDT, 3 hours 58 minutes before
NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059- WVZ042>045-071902- THUNDERSTORM POTENTIAL OUTLOOK NATIONAL WEATHER SERVICE BLACKSBURG VA 1203 PM EDT WED JUL 7 1999 A COLD FRONT WILL SLOWLY SAG SOUTH ACROSS THE REGION THIS AFTERNOON AND TONIGHT. THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE FRONT... STARTING FIRST OVER THE MOUNTAINS...THEN DEVELOPING OVER FLAT TERRAIN. SOME OF THE STORMS MAY PRODUCE VERY HEAVY RAIN... STRONG WIND AND LARGE HAIL. THE STRONGEST THUNDERSTORMS ARE LIKELY SOUTHEAST OF A LINE FROM LYNCHBURG VIRGINIA TO MARION VIRGINIA. HH
Special weather statement, Jul 7, 12:03 PM EDT, 3 hours 58 minutes before
NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059- WVZ042>045-071902- THUNDERSTORM POTENTIAL OUTLOOK NATIONAL WEATHER SERVICE BLACKSBURG VA 1203 PM EDT WED JUL 7 1999 A COLD FRONT WILL SLOWLY SAG SOUTH ACROSS THE REGION THIS AFTERNOON AND TONIGHT. THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE FRONT... STARTING FIRST OVER THE MOUNTAINS...THEN DEVELOPING OVER FLAT TERRAIN. SOME OF THE STORMS MAY PRODUCE VERY HEAVY RAIN... STRONG WIND AND LARGE HAIL. THE STRONGEST THUNDERSTORMS ARE LIKELY SOUTHEAST OF A LINE FROM LYNCHBURG VIRGINIA TO MARION VIRGINIA. HH
The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 1:29 PM EDT | Severe Thunderstorm Warning | RNK | Pittsylvania, City of Danville | 51 min |
| Jul 7, 2:19 PM EDT | Severe Thunderstorm Warning | RNK | Pittsylvania, City of Danville | 51 min |
| Jul 7, 3:10 PM EDT | Severe Thunderstorm Warning | RNK | Franklin | 50 min |
| Jul 7, 3:14 PM EDT | Severe Thunderstorm Warning | RNK | Amherst | 66 min |
| Jul 7, 3:53 PM EDT | Severe Thunderstorm Warning | RNK | Bedford | 62 min |
| Jul 7, 4:05 PM EDT | Severe Thunderstorm Warning | RNK | Campbell, City of Lynchburg | 50 min |
| Jul 7, 4:11 PM EDT | Severe Thunderstorm Warning | RNK | Halifax | 64 min |
| Jul 7, 5:14 PM EDT | Severe Thunderstorm Warning | RNK | Botetourt | 46 min |
| Jul 7, 12:26 PM EDT | Severe Thunderstorm Warning | RNK | Ashe | 34 min |
| Jul 7, 2:30 PM EDT | Severe Thunderstorm Warning | RNK | Rockingham | 45 min |
| Jul 7, 2:36 PM EDT | Severe Thunderstorm Warning | RNK | Surry | 44 min |
| Jul 7, 3:04 PM EDT | Severe Thunderstorm Warning | RNK | Caswell | 51 min |
| Jul 7, 3:24 PM EDT | Severe Thunderstorm Warning | RNK | Yadkin | 51 min |
| Jul 7, 4:22 PM EDT | Flash Flood Warning | RNK | Rockingham | 3 hr |
Nearby
Severe Thunderstorm Warnings in North Carolina, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.