Alert archive / South Carolina / Lake Wind Advisories in 2007
Lake Wind Advisory 20, NWS Columbia, SC
NWS Columbia, SC issued this lake wind advisory at Apr 7, 2007, 4:27 AM EDT for 16 counties in South Carolina; 5 counties in Georgia. It took effect at Apr 7, 2007, 8:00 AM EDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Apr 7, 2007, 4:27 AM EDT (08:27 UTC)
- In effect from
- Apr 7, 2007, 8:00 AM EDT
- Expired
- Apr 7, 2007, 10:00 PM EDT
- In force
- 14 hr
- Issued by
- NWS Columbia, SC
All 21 counties
Burke County, GA, Columbia County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC
The radar
The Columbia radar (KCAE), 28 km from the middle of the area, began a volume at 08:29 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
Charleston AFB, SC (KCHS), launched 00:00Z, 8.5 hours before the alert went out and 162 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1552 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this lake wind advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Columbia, SC wrote its last area forecast discussion before this lake wind advisory went out at Apr 7, 4:16 AM EDT, 11 minutes earlier.
Area forecast discussion, Apr 7, 4:16 AM EDT, 11 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
416 AM EDT SAT APR 7 2007
.SHORT TERM /TODAY THROUGH MONDAY/...
A DRY CLIPPER FRONT JUST MOVED THROUGH THE AREA AND TEMPERATURES
ARE FALLING INTO THE 30S IN SOME AREAS. CAE PRESENTLY 42 BUT WITH
GOOD COLD AIR ADVECTION AND MORE THAN 3 HOURS OF DARKNESS STILL...
THINK 32 IS POSSIBLE. SO WILL LEAVE FREEZE WARNING FOR THIS
MORNING INTACT. AFTER FEW MORNING MID LEVEL CLOUDS CLEAR THE AREA
SHORTLY AFTER SUNRISE...IT SHOULD BE A SUNNY BRISK DAY WITH CHILLY
HIGH PRESSURE IN CONTROL. WITH GOOD MIXING IN LOWER LAYERS AS WE
GET SOLAR INSULATION...STRONGER WINDS 20-30 KT SHOULD MIX DOWN
ENOUGH TO HAVE NW WINDS 15-25 KT. SO HAVE DECIDED TO ISSUE LAKE
WIND ADVISORY 8AM-4PM TODAY. COLD AIR ADVECTION IS NOT AS STRONG
THIS AFTERNOON...SO MIXING SHOULD BE LESS OF AN ISSUE. IN ADDITION
...WILL CONTINUE THE RED FLAG WARNING WITH THE HIGHER WINDS AND
LOW RELATIVE HUMIDITIES. COLD HIGH PRESSURE WILL SETTLE OVER THE
AREA TONIGHT AND EXPECT GOOD RADIATIVE COOLING CONDITIONS WITH
MOSTLY CLEAR SKIES AND LIGHT WINDS. RADIATIVE COOLING LOW
TEMPERATURE SCHEME GIVES CAE 25 AND WILL GO WITH 25. IF CAE HITS
25 SUNDAY MORNING...THAT WILL BE THE COLDEST LOW TEMPERATURE
RECORDED FOR THE MONTH OF APRIL SINCE RECORDS WERE KEPT BEGINNING
WAY BACK IN 1887. HIGH PRESSURE AND CHILLY AIR SUNDAY AND MONDAY.
HIGH TEMPERATURES MID TO UPPER 50S SUNDAY AND UPPER 50S TO LOWER
60S MONDAY. COLD AGAIN SUNDAY NIGHT WITH LOWS IN THE UPPER 20S AS
ANOTHER RE-ENFORCING DRY CLIPPER FRONT MOVES THROUGH.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
NO SIGNIFICANT CHANGES. MORE ZONAL FLOW MONDAY NIGHT AND TUESDAY.
STILL CHILLY WITH HIGHS NEAR 60 AND LOWS NEAR 30. BUT A STRONGER
SHORT WAVE APPROACHES TUESDAY NIGHT AND MOVES THROUGH WEDNESDAY
AND WEDNESDAY NIGHT WITH A CHANCE OF SHOWERS AND THUNDERSTORMS.
WARMER BY THAT TIME WITH LOWS IN THE 40S AND HIGHS NEAR 70.
FINALLY...AN UPPER RIDGE BUILDS IN FOR THURSDAY AND FRIDAY WITH
HIGHS IN THE 70S AND LOWS IN THE 40S.
&&
.AVIATION /06Z-06Z/...
WIND AND DRY AIR TO MAINTAIN VFR CONDITIONS. EXPECT BREEZY
CONDITIONS THROUGH THIS AFTERNOON...WITH DIMINISHING SPEEDS THIS
EVENING.
&&
.CAE WATCHES/WARNINGS/ADVISORIES...
SC...LAKE WIND ADVISORY FROM 8 AM THIS MORNING TO 4 PM EDT THIS
AFTERNOON FOR SCZ015-016-018-020>022-025>031-035>038-041.
FREEZE WARNING UNTIL 9 AM EDT THIS MORNING FOR SCZ015-016-018-
020>022-025>031-035>038-041.
FREEZE WARNING FROM MIDNIGHT TONIGHT TO 9 AM EDT SUNDAY FOR
SCZ015-016-018-020>022-025>031-035>038-041.
RED FLAG WARNING FROM 10 AM THIS MORNING TO 8 PM EDT THIS
EVENING FOR SCZ015-016-018-020>022-025>031-035>038-041.
GA...LAKE WIND ADVISORY FROM 8 AM THIS MORNING TO 4 PM EDT THIS
AFTERNOON FOR GAZ040-063>065-077.
FREEZE WARNING UNTIL 9 AM EDT THIS MORNING FOR GAZ040-063>065-
077.
FREEZE WARNING FROM MIDNIGHT TONIGHT TO 9 AM EDT SUNDAY FOR
GAZ040-063>065-077.
RED FLAG WARNING FROM 10 AM THIS MORNING TO 8 PM EDT THIS
EVENING FOR GAZ040-063>065-077.
&&
SHORT TERM...07
LONG TERM...07
AVIATION...31Hazardous weather outlook, Apr 6, 7:50 PM EDT, 8 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE COLUMBIA SC 750 PM EDT FRI APR 6 2007 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041- 071200- LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD- MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON- RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON- BAMBERG- 750 PM EDT FRI APR 6 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MIDLANDS OF SOUTH CAROLINA AND THE CENTRAL SAVANNAH RIVER AREA.. .DAY ONE...TONIGHT .FREEZE...FREEZE WARNING IN EFFECT LATE TONIGHT AND EARLY SATURDAY MORNING. REFER TO FREEZE WARNING (PRODUCT ID CAENPWCAE) ISSUED BY THIS OFFICE AT 316 PM. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY .FREEZE...FREEZE WATCH IN EFFECT LATE SATURDAY NIGHT AND EARLY SUNDAY MORNING. REFER TO FREEZE WARNING (PRODUCT ID CAENPWCAE) ISSUED BY THIS OFFICE AT 316 PM. .FIRE WEATHER...RED FLAG WARNING FROM 12 PM TO 8 PM EDT SATURDAY. REFER TO FIRE WEATHER WATCH (PRODUCT ID CAERFWCAE) ISSUED BY THIS OFFICE AT 316 PM .SPOTTER INFORMATION STATEMENT...
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 4:27 AM EDT | Freeze Warning | CAE | Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more | 29 hr |
| Apr 7, 3:13 PM EDT | Freeze Watch | CAE | Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more | 13 hr |
Nearby
Lake Wind Advisories in South Carolina, 2007Lake Wind Advisories in Georgia, 2007Every lake wind advisory in 2007
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.