Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 173, NWS Tampa Bay, FL

November 14, 1997Polk County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Nov 14, 1997, 7:47 AM EST for Polk County, Florida. It was in force for 43 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: Nov 14, 1997, 7:47 AM EST (12:47 UTC)
Expired: Nov 14, 1997, 8:30 AM EST
In force: 43 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Polk County, FL

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 0.8 hours before the alert went out and 275 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: 667 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 948 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Tampa Bay, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Nov 14, 2:45 AM EST, 5 hours 2 minutes earlier.

Area forecast discussion, Nov 14, 2:45 AM EST, 5 hours 2 minutes before

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In the hours before

Special weather statement, Nov 14, 5:15 AM EST, 2 hours 32 minutes before

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Special weather statement, Nov 14, 5:20 AM EST, 2 hours 27 minutes before

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<head>
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  <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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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 13, 7:10 PM EST	Flash Flood Warning	TBW	Hardee	5 hr
Nov 13, 9:00 PM EST	Flash Flood Warning	TBW	Manatee, Sarasota	3 hr

Nearby

Severe Thunderstorm Warnings in Florida, 1997 Every severe thunderstorm warning in 1997

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.