Alert archive / Florida / Flash Flood Warnings in 2023

Flash Flood Warning 42, NWS Tallahassee, FL

July 14, 2023Walton County, Florida

NWS Tallahassee, FL issued this flash flood warning at Jul 14, 2023, 9:02 AM CDT for Walton County, Florida. It was in force for 3 hr. 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 14, 2023, 9:02 AM CDT (14:02 UTC)
Expired: Jul 14, 2023, 12:00 PM CDT
In force: 3 hr
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 25 km from the middle of the area, began a volume at 14:01 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 2.0 hours before the alert went out and 291 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: 581 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 631 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 44 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 flash flood warning 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 flash flood warning went out at Jul 14, 8:23 AM CDT, 39 minutes earlier.

Area forecast discussion, Jul 14, 8:23 AM CDT, 39 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

Local storm report, Jul 14, 7:20 AM CDT, 1 hour 42 minutes before

Preliminary Local Storm Report
National Weather Service Tallahassee FL
820 AM EDT Fri Jul 14 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0819 AM     Rain             1 N Inlet Beach         30.29N 86.01W
07/14/2023  M6.04 inch       Walton             FL   Mesonet

            Ambient weather station daily rainfall
            exceeded 6 inches.

&&

PC

Special weather statement, Jul 14, 7:23 AM CDT, 1 hour 39 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
723 AM CDT Fri Jul 14 2023

FLZ008-108-141330-
Central Walton FL-South Walton FL-
723 AM CDT Fri Jul 14 2023

...Strong thunderstorms will impact portions of southwestern Walton
County through 830 AM CDT...

At 723 AM CDT, Doppler radar was tracking strong thunderstorms
capable of producing waterspouts along a line extending from near
Eglin Air Force Base to near Santa Rosa Beach.
Movement was southeast at 5 mph.

HAZARD...Waterspouts and wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Waterspouts can easily overturn boats and create locally
         hazardous waters. Gusty winds could knock down tree limbs
         and blow around unsecured objects.

Locations impacted include...
Santa Rosa Beach, Eglin Air Force Base, Freeport, Inlet Beach,
Portland, Villa Tasso, Port Washington, Blue Mountain Beach, Seaside,
Miramar Beach, Gulf Pines, New Home, Bunker, Grayton Beach, Seagrove
Beach, Sandestin and Four Mile Village.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3038 8633 3042 8631 3039 8626 3040 8623
      3042 8627 3038 8611 3039 8611 3044 8616
      3047 8613 3046 8619 3050 8620 3048 8622
      3046 8639 3068 8639 3071 8620 3043 8599
      3029 8600 3022 8596 3032 8640 3040 8640
TIME...MOT...LOC 1223Z 320DEG 6KT 3067 8630 3032 8621

WATERSPOUT...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

11-MM

Local storm report, Jul 14, 7:45 AM CDT, 1 hour 17 minutes before

Preliminary Local Storm Report
National Weather Service Tallahassee FL
845 AM EDT Fri Jul 14 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0824 AM     Flood            1 WNW Inlet Beach       30.28N 86.03W
07/14/2023                   Walton             FL   NWS Employee

            Off-duty NWS meteorologist reported several
            inches of water across streets in Alys
            Beach.

&&

PC

Local storm report, Jul 14, 8:05 AM CDT, 57 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 14, 8:29 AM CDT, 33 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 14, 8:51 AM CDT, 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>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 1:54 AM CDT	Areal Flood Advisory	TAE	Holmes, Jackson, Washington	2 hr
Jul 14, 2:46 AM CDT	Flash Flood Warning	TAE	Holmes, Jackson	2 hr
Jul 14, 3:56 AM CDT	Special Weather Statement	TAE	Walton	34 min
Jul 14, 4:10 AM CDT	Special Marine Warning	TAE		65 min
Jul 14, 5:19 AM CDT	Flash Flood Warning	TAE	Holmes, Jackson	3 hr
Jul 14, 6:01 AM CDT	Areal Flood Advisory	TAE	Calhoun, Gadsden, Jackson, Liberty	3 hr
Jul 14, 6:33 AM CDT	Flood Watch	TAE	Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 5 more	36 hr
Jul 14, 6:39 AM CDT	Areal Flood Advisory	TAE	Bay, Walton	3 hr
Jul 14, 6:53 AM CDT	Flash Flood Warning	TAE	Bay, Walton	5 hr
Jul 14, 7:01 AM CDT	Special Weather Statement	TAE	Walton	44 min
Jul 14, 7:20 AM CDT	Special Weather Statement	TAE	Washington	55 min
Jul 14, 7:21 AM CDT	Special Marine Warning	TAE		114 min
Jul 14, 7:23 AM CDT	Special Weather Statement	TAE	Walton	67 min
Jul 14, 7:39 AM CDT	Areal Flood Advisory	TAE	Bay, Holmes, Walton, Washington	4 hr
Jul 14, 7:39 AM CDT	Areal Flood Advisory	TAE	Walton	3 hr
Jul 14, 7:45 AM CDT	Flash Flood Warning	TAE	Walton	3 hr
Jul 14, 7:58 AM CDT	Areal Flood Advisory	TAE	Walton	4 hr
Jul 14, 8:29 AM CDT	Areal Flood Advisory	TAE	Bay	3 hr
Jul 14, 8:45 AM CDT	Areal Flood Advisory	TAE	Calhoun, Holmes, Jackson, Washington	3 hr
Jul 14, 9:15 AM CDT	Special Marine Warning	TAE		60 min
Jul 14, 9:34 AM CDT	Flash Flood Warning Considerable damage threat	TAE	Walton	3 hr
Jul 14, 10:16 AM CDT	Special Marine Warning	TAE		89 min
Jul 14, 10:38 AM CDT	Rip Current Statement	TAE	Bay, Walton	14 hr
Jul 14, 11:25 AM CDT	Special Marine Warning	TAE		108 min
Jul 14, 12:01 PM CDT	Areal Flood Warning	TAE	Walton	3 hr
Jul 14, 12:42 PM CDT	Areal Flood Warning	TAE	Bay, Walton	6 hr
Jul 14, 4:48 AM CDT	Areal Flood Advisory	TAE	Coffee, Geneva	3 hr

Nearby

Flash Flood Warnings in Florida, 2023 Every flash flood warning in 2023

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.