Alert archive / Florida / Mesoscale Discussions in 2017

Mesoscale Discussion 115

January 22, 201711 counties in Florida; 5 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 22, 2017, 12:36 PM CST for 11 counties in Florida; 5 counties in Georgia. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Jan 22, 2017, 12:36 PM CST (18:36 UTC)
Expired
Jan 22, 2017, 1:30 PM CST
In force
54 min
Issued by
the Storm Prediction Center

Counties Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL, Washington County, FL, Decatur County, GA, Grady County, GA, Miller County, GA, Seminole County, GA, Thomas County, GA

The radar

The Tallahassee radar (KTLH), 63 km from the middle of the area, began a volume at 18:40 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.6 hours before the alert went out and 66 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, Tallahassee Rgnl, FL at 12:00Z on 2017-01-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1298 joules per kilogram.LCLLFCEL10008507005003002001001 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, Tallahassee Rgnl, FL at 12:00Z on 2017-01-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 296 square meters per square second.1939587897117Sfc1 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
1298 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
635 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
296 m²/s²
0-3 km storm-relative helicity
441 m²/s²
Significant tornado parameter
2.9
Supercell composite
15.6

Open this sounding in Storm Lab

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>

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 21, 6:51 PM CSTTornado Watch PDSSPCEscambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton and 1 more8 hr
Jan 21, 8:30 PM CSTMesoscale DiscussionSPCHolmes, Jackson, Santa Rosa90 min
Jan 21, 9:57 PM CSTMesoscale DiscussionSPCHolmes, Jackson, Washington93 min
Jan 21, 11:49 PM CSTMesoscale DiscussionSPCHolmes, Jackson, Santa Rosa116 min
Jan 22, 1:55 AM CSTMesoscale DiscussionSPCCalhoun, Gadsden, Hamilton, Jackson, Jefferson, Leon and 1 more65 min
Jan 22, 2:20 AM CSTTornado WatchSPCBaker, Columbia, Gadsden, Hamilton, Jackson, Jefferson and 4 more9 hr
Jan 22, 5:34 AM CSTMesoscale DiscussionSPCAlachua, Baker, Bay, Bradford, Calhoun, Clay and 24 more86 min
Jan 22, 6:11 AM CSTMesoscale DiscussionSPCBaker, Calhoun, Gadsden, Hamilton, Jackson, Jefferson and 4 more2 hr
Jan 22, 7:43 AM CSTMesoscale DiscussionSPCBay, Calhoun, Escambia, Holmes, Jackson, Okaloosa and 3 more2 hr
Jan 22, 8:06 AM CSTTornado WatchSPCBay, Calhoun, Escambia, Franklin, Gulf, Holmes and 6 more5 hr
Jan 22, 8:11 AM CSTMesoscale DiscussionSPCBaker, Columbia, Duval, Gadsden, Hamilton, Jefferson and 4 more64 min
Jan 22, 9:16 AM CSTMesoscale DiscussionSPCCalhoun, Escambia, Gadsden, Holmes, Jackson, Jefferson and 7 more59 min
Jan 22, 10:25 AM CSTMesoscale DiscussionSPCAlachua, Baker, Bay, Bradford, Calhoun, Clay and 20 more95 min
Jan 22, 11:02 AM CSTMesoscale DiscussionSPCBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 4 more58 min
Jan 22, 11:47 AM CSTTornado Watch PDSSPCAlachua, Baker, Bay, Bradford, Calhoun, Clay and 27 more7 hr
Jan 22, 12:56 PM CSTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 7 more94 min
Jan 22, 2:02 PM CSTMesoscale DiscussionSPCGadsden, Jefferson, Lafayette, Leon, Madison, Taylor and 1 more58 min
Jan 22, 3:12 PM CSTMesoscale DiscussionSPCDeSoto, Hardee, Highlands, Hillsborough, Lake, Manatee and 6 more63 min
Jan 22, 3:19 PM CSTMesoscale DiscussionSPCAlachua, Baker, Columbia, Dixie, Gilchrist, Hamilton and 5 more86 min
Jan 22, 3:35 PM CSTTornado Watch PDSSPCBrevard, Citrus, DeSoto, Hardee, Hernando, Highlands and 12 more5 hr
Jan 21, 11:06 PM CSTMesoscale DiscussionSPCAppling, Bacon, Ben Hill, Bibb, Bleckley, Brantley and 34 more54 min
Jan 22, 2:46 AM CSTMesoscale DiscussionSPCBaldwin, Barrow, Bibb, Butts, Carroll, Chattahoochee and 38 more119 min
Jan 22, 9:41 AM CSTMesoscale DiscussionSPCBaldwin, Bibb, Bleckley, Butts, Crawford, Dodge and 27 more94 min
Jan 22, 12:31 PM CSTMesoscale DiscussionSPCChattahoochee, Harris, Meriwether, Muscogee, Troup59 min
Jan 22, 2:28 PM CSTMesoscale DiscussionSPCCarroll, Chattahoochee, Clayton, Coweta, Douglas, Fayette and 10 more92 min
Jan 22, 3:02 PM CSTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Effingham and 8 more88 min
Jan 22, 3:25 PM CSTTornado Watch PDSSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 10 more3 hr
Jan 22, 5:58 PM CSTMesoscale DiscussionSPCBrantley, Bryan, Bulloch, Burke, Candler, Chatham and 11 more92 min

Nearby

Mesoscale Discussions in Florida, 2017Mesoscale Discussions in Georgia, 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.