Alert archive / Georgia / Mesoscale Discussions in 2017

Mesoscale Discussion 119

January 22, 201714 counties in Georgia; 11 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 22, 2017, 4:02 PM EST for 14 counties in Georgia; 11 counties in South Carolina. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Jan 22, 2017, 4:02 PM EST (21:02 UTC)
Expired
Jan 22, 2017, 5:30 PM EST
In force
88 min
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 25 counties

Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Jenkins County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Screven County, GA, Tattnall County, GA, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Jasper County, SC, Orangeburg County, SC

The radar

The Charleston,SC radar (KCLX), 8 km from the middle of the area, began a volume at 21:01 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.0 hours before the alert went out and 103 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.

Skew-T log-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 2017-01-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2017-01-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 253 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
762 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
253 m²/s²
0-3 km storm-relative helicity
438 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 21, 7:51 PM ESTTornado Watch PDSSPCBaker, Ben Hill, Calhoun, Clay, Colquitt, Decatur and 15 more8 hr
Jan 21, 9:30 PM ESTMesoscale DiscussionSPCClay, Early, Quitman, Seminole90 min
Jan 21, 10:57 PM ESTMesoscale DiscussionSPCBaker, Calhoun, Chattahoochee, Clay, Decatur, Dougherty and 10 more93 min
Jan 22, 12:06 AM ESTMesoscale DiscussionSPCAppling, Bacon, Ben Hill, Bibb, Bleckley, Brantley and 34 more54 min
Jan 22, 12:49 AM ESTMesoscale DiscussionSPCBaker, Calhoun, Chattahoochee, Clay, Decatur, Dougherty and 10 more116 min
Jan 22, 2:55 AM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 47 more65 min
Jan 22, 3:20 AM ESTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 56 more9 hr
Jan 22, 3:46 AM ESTMesoscale DiscussionSPCBaldwin, Barrow, Bibb, Butts, Carroll, Chattahoochee and 38 more119 min
Jan 22, 6:34 AM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 57 more86 min
Jan 22, 7:11 AM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 49 more2 hr
Jan 22, 9:11 AM ESTMesoscale DiscussionSPCBrantley, Brooks, Camden, Charlton, Clinch, Decatur and 7 more64 min
Jan 22, 10:16 AM ESTMesoscale DiscussionSPCBrooks, Camden, Charlton, Clinch, Decatur, Echols and 5 more59 min
Jan 22, 10:41 AM ESTMesoscale DiscussionSPCBaldwin, Bibb, Bleckley, Butts, Crawford, Dodge and 27 more94 min
Jan 22, 11:25 AM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 31 more95 min
Jan 22, 12:02 PM ESTMesoscale DiscussionSPCDecatur, Seminole58 min
Jan 22, 12:47 PM ESTTornado Watch PDSSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 100 more7 hr
Jan 22, 1:31 PM ESTMesoscale DiscussionSPCChattahoochee, Harris, Meriwether, Muscogee, Troup59 min
Jan 22, 1:36 PM ESTMesoscale DiscussionSPCDecatur, Grady, Miller, Seminole, Thomas54 min
Jan 22, 3:02 PM ESTMesoscale DiscussionSPCBaker, Ben Hill, Berrien, Brooks, Calhoun, Colquitt and 15 more58 min
Jan 22, 3:28 PM ESTMesoscale DiscussionSPCCarroll, Chattahoochee, Clayton, Coweta, Douglas, Fayette and 10 more92 min
Jan 22, 4:19 PM ESTMesoscale DiscussionSPCAtkinson, Bacon, Ben Hill, Berrien, Charlton, Clinch and 12 more86 min
Jan 22, 4:25 PM ESTTornado Watch PDSSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 10 more3 hr
Jan 22, 6:58 PM ESTMesoscale DiscussionSPCBrantley, Bryan, Bulloch, Burke, Candler, Chatham and 11 more92 min

Nearby

Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in South Carolina, 2017Every mesoscale discussion 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.