Alert archive / Georgia / Special Weather Statements in 2017
Special Weather Statement, NWS Charleston, SC
NWS Charleston, SC issued this special weather statement at Aug 9, 2017, 1:22 PM EDT for Candler County, Georgia. It was in force for 38 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
- Aug 9, 2017, 1:22 PM EDT (17:22 UTC)
- Expired
- Aug 9, 2017, 2:00 PM EDT
- In force
- 38 min
- Issued by
- NWS Charleston, SC
County Candler County, GA
The radar
The Charleston,SC radar (KCLX), 94 km from the middle of the area, began a volume at 17:25 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 12:00Z, 5.4 hours before the alert went out and 195 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
- 662 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 627 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>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 Charleston, SC wrote its last area forecast discussion before this special weather statement went out at Aug 8, 3:59 PM EDT, 21 hours 23 minutes earlier.
Area forecast discussion, Aug 8, 3:59 PM EDT, 21 hours 23 minutes before
Area Forecast Discussion National Weather Service Charleston SC 359 PM EDT Tue Aug 8 2017 .SYNOPSIS... A front will linger nearby through Thursday before lifting back north. High pressure will rebuild Friday through early next week. A cold front could approach the area next Monday or Tuesday. && .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/... Remainder of the afternoon: The combination of weak upper forcing, deep moisture and a web of mesoscale boundary interactions will keep numerous showers and tstms going over our SC zones. Rain will be heavy at times with localized flooding expected will training convection and in association with strongest storms. The latest HRRR model runs suggest the brunt of the heavier rains will slide offshore between around 22Z or 23Z at the latest. Much of this rain was falling during the low tide cycle along the coast, but rainfall rates were still impressive and will need to be monitored. Tonight: High resolution models continue to show scattered convection over southeast GA early this evening, likely decreasing after 01Z with the loss of diurnal heating. Across SC, showers and storms are expected to be mostly offshore at dusk to the north of the Savannah River, leaving areas of lighter rains with a few pockets of convective rains still possible. A weak cold front should drift over the forecast area tonight while deep moisture remains intact. A late night short wave in the mid levels may keep some scattered rains/showers around late in the night. We maintained chance POPs many areas after midnight which maintained good persistence with the previous forecast. Low temps will be in the lower to mid 70s and with the frontal zone in the vicinity, there could be patches of low clouds and patchy fog over inland areas, mainly north of I-16. && .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/... A relatively wet pattern is expected. A weak mid-level trough will remain over our region while several shortwaves traverse the trough. The shortwaves on Wednesday and Thursday might be stronger and more noticeable to our weather. At the surface, a stationary front will linger nearby through Thursday, then transition into a warm front and rapidly move northward Thursday night into Friday. Deep moisture is in place with PWATs above 2.0", perhaps getting up to 2.3" at times. Lift should be decent due to the vicinity of the front, enhanced by cold pool boundaries. Numerous showers are expected, with the greatest potential being in the afternoon and evening. Instability is moderate for this time of year and models show it increasing into Friday, especially during peak heating. The overall risk of severe weather is low. Heavy rain appears to be the main threat, especially due to weak steering flow. Local flooding is not out of the question, especially in storms that train. Cloud cover and shower coverage should keep highs several degrees below normal. Lows will be in the lower to mid 70s. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... Weak upper ridging over the weekend will result in a slight increase in temperatures and a more typical summertime convection pattern favoring afternoon and evening hours. && .AVIATION /20Z TUESDAY THROUGH SUNDAY/... Through sunset, the coastal corridor will see showers and storms scattered to numerous at times, especially north of the Savannah River. Thunderstorms will produce heavy rains at times, lowering vsbys briefly below 2 miles at times. This evening, models differ on convective patterns but we carried prevailing showers at KCHS and vicinity showers at KSAV in the TAFs. Thunder is certainly still possible into the evening hours. We will also need to watch for MVFR/IFR cigs as a light surface wind shift to north is possible. While some of the numerical guidance hints at lower cigs, since most of the forecast soundings did not show tighter low level inversions we opted to wait on any introductions for now. Extended Aviation Outlook: Showers and tstms may occasionally affect the terminals, with temporary visibility restrictions the primary concern. && .MARINE... Tonight: Synoptic winds have decreased today and mainly light winds are expected tonight, becoming variable late as a weak front drops in. The main hazards tonight will be scattered to numerous showers and storms producing frequent cloud to water lightning strikes and heavy rains with low visibilities. Wednesday through Sunday: A front will linger nearby through Thursday before lifting back north. Atlantic high pressure will become the more dominant feature Friday through the weekend. A weak pressure gradient will result in winds at or below 10 kt with weak afternoon sea breezes close to the coast. Conditions may be favorable for waterspouts Wednesday morning with light and variable winds and deep moist vertical profiles. Atlantic high pressure will remain the dominant marine feature Wednesday through Sunday, resulting in south to southwest winds at or below 10 kt and weak afternoon sea breezes along the coast. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. MARINE...None. && NEAR TERM... SHORT TERM...MS LONG TERM...MS AVIATION...MS MARINE...MS
Hazardous weather outlook, Aug 8, 4:06 PM EDT, 21 hours 16 minutes before
Hazardous Weather Outlook National Weather Service Charleston SC 406 PM EDT Tue Aug 8 2017 GAZ087-088-099>101-116>119-SCZ040-042>045-047>052-092015- Jenkins-Screven-Candler-Bulloch-Effingham-Inland Bryan-Coastal Bryan- Inland Chatham-Coastal Chatham-Allendale-Hampton-Inland Colleton- Dorchester-Inland Berkeley-Inland Jasper-Beaufort-Coastal Colleton- Charleston-Coastal Jasper-Tidal Berkeley- 406 PM EDT Tue Aug 8 2017 This Hazardous Weather Outlook is for southeast Georgia and southeast South Carolina. .DAY ONE...Tonight. Heavy Rainfall: A front will move into the area this afternoon and numerous to widespread showers and thunderstorms are expected to continue through the early evening hours. Locally heavy rain will be possible and could cause minor flooding of low lying and poor drainage areas across southeast South Carolina and southeast Georgia. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. AMZ330-350-352-354-374-GAZ114-115-137>141-092015- Charleston Harbor- Waters from South Santee River to Edisto Beach SC out 20 nm- Waters from Edisto Beach SC to Savannah GA out 20 nm- Waters from Savannah GA to Altamaha Sound GA out 20 nm...including Grays Reef National Marine Sanctuary- Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 nm-Tattnall-Evans-Long-Inland Liberty-Coastal Liberty- Inland McIntosh-Coastal McIntosh- 406 PM EDT Tue Aug 8 2017 This Hazardous Weather Outlook is for Atlantic coastal waters and southeast Georgia. .DAY ONE...Tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time.
Nearby
Special Weather Statements in Georgia, 2017Every special weather statement in 2017
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.