Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 217, NWS Jacksonville, FL

July 11, 2015Alachua County, Bradford County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 11, 2015, 5:00 PM EDT for Alachua County, Bradford County, Florida. It was in force for 19 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 11, 2015, 5:00 PM EDT (21:00 UTC)
Expired
Jul 11, 2015, 5:19 PM EDT
In force
19 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Alachua County, FL, Bradford County, FL

The radar

The Jacksonville radar (KJAX), 92 km from the middle of the area, began a volume at 21:00 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, 9.0 hours before the alert went out and 207 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 2015-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 465 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 2015-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 square meters per square second.1939Sfc1 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
465 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
1400 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
-13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 3:06 PM EDT, 1 hour 54 minutes earlier.

Area forecast discussion, Jul 11, 3:06 PM EDT, 1 hour 54 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
306 PM EDT SAT JUL 11 2015

...CONTINUED HOT WITH HEAT INDICES NEAR 105F...

.NEAR TERM...UPPER-LEVEL HIGH PRESSURE CONTINUES TO RETROGRADE
WESTWARD TO THE SOUTHERN PLAINS BY SUNDAY...WITH OUR FORECAST AREA
IN NW TO N UPPER FLOW PATTERN EAST OF THE HIGH. WIDELY SCATTERED
MID-AFTERNOON T-STORMS WITH SEA BREEZES WILL INCREASE IN COVERAGE
TOWARD 00Z AS THEY CONVERGE W OF HWY 301. IN ADDITION...ACTIVITY
THAT DEVELOPS WITH CTRL GA SURFACE TROF WILL MOVE SOUTHWARD ACROSS
OUR SRN GA COUNTIES DURING THE EVENING HOURS. ACTIVITY SHOULD
GRADUALLY DIMINISH TOWARD MIDNIGHT. LOWS TONIGHT SHOULD BE IN THE
LOW-MID 70S.

FOR SUNDAY...ANTICIPATING WIDELY SCATTERED T-STORMS AHEAD OF SRN GA
SURFACE TROUGH...WITH GREATER COVERAGE ACROSS NE FL WITH SEA BREEZES...
WITH HIGHEST POPS...50 PCT... IN OUR SRN COUNTIES. MODEL GUIDANCE
SHOWS HOT TEMPS...ALTHOUGH CONSENSUS GUIDANCE IS SLIGHTLY COOLER
THAN MOS GUIDANCE. WILL GO WITH HIGH TEMPS CLOSER TO MET GUIDANCE
WHICH APPEARS TO BE IN LINE WITH OVERALL CONSENSUS TEMP GUIDANCE
FOR SUNDAY.

MONDAY AND TUESDAY...UPPER TROUGH WILL AMPLIFY ALONG THE EAST
COAST AS RIDGE SHIFTS TO THE CENTRAL PLAINS. SCATTERED TO
NUMEROUS STORMS EXPECTED TO FORM OVER THE AREA WITH ADDITIONAL
CONVECTION POSSIBLE ADVECTING IN FROM UPSTREAM SHORT WAVE ENERGY
IN NW FLOW ALOFT. TEMPERATURES WILL CONTINUE ABOVE AVERAGE DUE TO
OFFSHORE WINDS.

.LONG TERM...WEDNESDAY THROUGH SATURDAY...UPPER TROUGH ALONG THE
EAST COAST WILL SHIFT EAST THROUGH THE PERIOD WITH HIGH PRESSURE
BUILDING BACK IN FROM THE WEST. AT THE SURFACE HIGH PRESSURE WILL
PERSIST TO THE SOUTH WITH TROUGH TO THE NORTH. A WESTERLY STEERING
FLOW WILL RESULT IN LATE DAY SEABREEZE MERGERS NEAR THE EAST COAST.
TEMPERATURES AND POPS WILL BE AT OR ABOVE AVERAGE THROUGH THE PERIOD.

&&

.AVIATION...VFR CONDITIONS ARE EXPECTED OUTSIDE OF WIDELY SCATTERED
AFTERNOON AND EVENING TSRA TODAY AND AGAIN SUNDAY. TSRA WILL BE
CAPABLE OF WET MICROBURSTS BOTH DAYS.

&&

.MARINE...SOUTHWEST WINDS WILL PREVAIL THROUGH THE PERIOD WITH
SURFACE RIDGE SOUTH AND TROUGHING NORTH. MAINLY LATE DAY AND
EVENING THUNDERSTORMS POSSIBLE EACH DAY AS STEERING WINDS BECOME
WESTERLY.

RIP CURRENTS: LOW RISK DUE TO OFFSHORE WINDS.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  74  98  73  97 /  30  20  20  40
SSI  77  91  77  88 /  20  20  10  40
JAX  75  96  75  95 /  20  30  10  50
SGJ  75  93  76  90 /  10  40  10  40
GNV  73  96  74  93 /  40  50  20  50
OCF  74  96  73  92 /  40  50  20  40

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GA...NONE.
AM...NONE.
&&

WOLF/ZIBURA/
Hazardous weather outlook, Jul 11, 4:34 AM EDT, 12 hours 26 minutes before
<!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>

In the hours before

Special weather statement, Jul 11, 4:25 PM EDT, 35 minutes before
<!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>
Local storm report, Jul 11, 4:30 PM EDT, 30 minutes before
<!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>
Special weather statement, Jul 11, 4:41 PM EDT, 19 minutes before
<!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>
Local storm report, Jul 11, 4:49 PM EDT, 11 minutes before
<!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>
Special weather statement, Jul 11, 4:51 PM EDT, 9 minutes before
<!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>
Local storm report, Jul 11, 4:53 PM EDT, 7 minutes before
<!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>

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 8:21 PM EDTSpecial Weather StatementJAXPutnam24 min
Jul 10, 8:36 PM EDTSpecial Weather StatementJAXBaker24 min
Jul 10, 9:03 PM EDTSpecial Weather StatementJAXBradford27 min
Jul 10, 9:18 PM EDTAreal Flood AdvisoryJAXBaker, Duval57 min
Jul 10, 10:31 PM EDTSpecial Weather StatementJAXAlachua29 min
Jul 11, 2:08 PM EDTSpecial Weather StatementJAXMarion37 min
Jul 11, 2:19 PM EDTSpecial Weather StatementJAXPutnam26 min
Jul 11, 2:37 PM EDTSevere Thunderstorm WarningJAXMarion38 min
Jul 11, 2:42 PM EDTSpecial Weather StatementJAXDuval48 min
Jul 11, 2:56 PM EDTSpecial Weather StatementJAXSaint Johns19 min
Jul 11, 3:03 PM EDTSevere Thunderstorm WarningJAXDuval, Saint Johns27 min
Jul 11, 3:10 PM EDTSpecial Weather StatementJAXPutnam35 min
Jul 11, 3:24 PM EDTSpecial Weather StatementJAXFlagler51 min
Jul 11, 3:38 PM EDTSpecial Weather StatementJAXDuval37 min
Jul 11, 3:41 PM EDTSevere Thunderstorm WarningJAXPutnam34 min
Jul 11, 3:53 PM EDTSevere Thunderstorm WarningJAXDuval37 min
Jul 11, 4:07 PM EDTSpecial Weather StatementJAXSaint Johns38 min
Jul 11, 4:15 PM EDTSpecial Weather StatementJAXPutnam45 min
Jul 11, 4:25 PM EDTSpecial Weather StatementJAXNassau50 min
Jul 11, 4:28 PM EDTSevere Thunderstorm WarningJAXDuval32 min
Jul 11, 4:41 PM EDTSpecial Weather StatementJAXBaker49 min
Jul 11, 4:51 PM EDTSpecial Weather StatementJAXBradford24 min
Jul 11, 5:04 PM EDTSpecial Weather StatementJAXBaker41 min
Jul 11, 5:16 PM EDTSpecial Weather StatementJAXNassau29 min
Jul 11, 5:33 PM EDTSevere Thunderstorm WarningJAXNassau42 min
Jul 11, 5:40 PM EDTSpecial Weather StatementJAXUnion50 min
Jul 11, 5:48 PM EDTSevere Thunderstorm WarningJAXNassau27 min
Jul 11, 5:56 PM EDTSpecial Weather StatementJAXGilchrist34 min
Jul 11, 6:00 PM EDTAreal Flood AdvisoryJAXNassau2 hr
Jul 11, 6:47 PM EDTSpecial Weather StatementJAXColumbia43 min
Jul 11, 7:23 PM EDTSpecial Weather StatementJAXColumbia37 min
Jul 10, 8:00 PM EDTSpecial Weather StatementJAXBrantley30 min
Jul 11, 5:27 PM EDTSpecial Weather StatementJAXCharlton48 min
Jul 11, 6:07 PM EDTSpecial Weather StatementJAXCharlton38 min
Jul 11, 6:18 PM EDTSpecial Weather StatementJAXCharlton42 min
Jul 11, 6:22 PM EDTSpecial Weather StatementJAXJeff Davis23 min
Jul 11, 6:32 PM EDTSpecial Weather StatementJAXCamden43 min
Jul 11, 6:58 PM EDTSpecial Weather StatementJAXCharlton47 min
Jul 11, 7:08 PM EDTAreal Flood AdvisoryJAXCamden2 hr
Jul 11, 7:57 PM EDTSpecial Weather StatementJAXBrantley33 min

Nearby

Severe Thunderstorm Warnings in Florida, 2015Every severe thunderstorm warning in 2015

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.