Alert archive / Florida / Special Weather Statements in 2017

Special Weather Statement, NWS Tallahassee, FL

July 21, 2017Bay County, Florida

NWS Tallahassee, FL issued this special weather statement at Jul 21, 2017, 12:20 PM CDT for Bay County, Florida. It was in force for 40 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: Jul 21, 2017, 12:20 PM CDT (17:20 UTC)
Expired: Jul 21, 2017, 1:00 PM CDT
In force: 40 min
Issued by: NWS Tallahassee, FL

County Bay County, FL

The radar

The Eglin Afb radar (KEVX), 63 km from the middle of the area, began a volume at 17:21 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, 5.3 hours before the alert went out and 115 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1395 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: -4 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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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 Tallahassee, FL wrote its last area forecast discussion before this special weather statement went out at Jul 21, 10:17 AM CDT, 2 hours 3 minutes earlier.

Area forecast discussion, Jul 21, 10:17 AM CDT, 2 hours 3 minutes before

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</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.
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        Please try again in a few minutes.
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In the hours before

Special weather statement, Jul 21, 12:20 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
120 PM EDT FRI JUL 21 2017

FLZ012-014-112-211800-
Coastal Bay FL-Inland Bay FL-Inland Gulf FL-
120 PM EDT FRI JUL 21 2017

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL BAY AND NORTHWESTERN
GULF COUNTIES UNTIL 200 PM EDT/100 PM CDT/...

At 120 PM EDT/1220 PM CDT/, National Weather Service doppler radar
indicated a a strong thunderstorm 8 miles east of Callaway. This
storm was drifting south.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

This storm will remain over mainly rural areas of east central Bay
and northwestern Gulf Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3021 8553 3020 8536 3007 8536 3009 8553
TIME...MOT...LOC 1720Z 337DEG 2KT 3015 8543

38-GODSEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 6:23 AM CDT	Special Marine Warning	TAE		52 min
Jul 21, 10:52 AM CDT	Special Marine Warning	TAE		83 min
Jul 21, 12:55 PM CDT	Special Weather Statement	TAE	Walton	50 min
Jul 21, 12:57 PM CDT	Special Weather Statement	TAE	Washington	48 min
Jul 21, 1:09 PM CDT	Severe Thunderstorm Warning	TAE	Bay, Walton, Washington	36 min
Jul 21, 1:23 PM CDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Washington	37 min
Jul 21, 1:28 PM CDT	Special Weather Statement	TAE	Liberty	47 min
Jul 21, 1:40 PM CDT	Severe Thunderstorm Warning	TAE	Gadsden	35 min
Jul 21, 1:50 PM CDT	Special Weather Statement	TAE	Liberty	40 min
Jul 21, 1:57 PM CDT	Severe Thunderstorm Warning	TAE	Calhoun, Liberty	33 min
Jul 21, 2:03 PM CDT	Special Weather Statement	TAE	Leon	42 min
Jul 21, 2:10 PM CDT	Severe Thunderstorm Warning	TAE	Gadsden, Leon	35 min
Jul 21, 2:31 PM CDT	Severe Thunderstorm Warning	TAE	Leon	44 min
Jul 21, 2:50 PM CDT	Severe Thunderstorm Warning	TAE	Gadsden, Leon	25 min
Jul 21, 2:54 PM CDT	Special Weather Statement	TAE	Jackson	51 min
Jul 21, 4:29 PM CDT	Special Weather Statement	TAE	Madison	46 min
Jul 21, 1:15 PM CDT	Special Weather Statement	TAE	Grady	45 min
Jul 21, 3:50 PM CDT	Special Weather Statement	TAE	Brooks	40 min
Jul 21, 4:12 PM CDT	Severe Thunderstorm Warning	TAE	Brooks, Lowndes	48 min
Jul 21, 3:44 PM CDT	Severe Thunderstorm Warning	TAE	Houston	46 min
Jul 21, 6:00 PM CDT	Special Weather Statement	TAE	Coffee	45 min

Nearby

Special Weather Statements in Florida, 2017 Every 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.