Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Tallahassee, FL

May 11, 2021Washington County, Florida

NWS Tallahassee, FL issued this special weather statement at May 11, 2021, 4:06 PM CDT for Washington County, Florida. It was in force for 39 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: May 11, 2021, 4:06 PM CDT (21:06 UTC)
Expired: May 11, 2021, 4:45 PM CDT
In force: 39 min
Issued by: NWS Tallahassee, FL

County Washington County, FL

The radar

The Eglin Afb radar (KEVX), 39 km from the middle of the area, began a volume at 21:09 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, 9.1 hours before the alert went out and 123 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: 799 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 866 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.1

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>

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 May 11, 4:00 PM CDT, 6 minutes earlier.

Area forecast discussion, May 11, 4:00 PM CDT, 6 minutes before

Area Forecast Discussion
National Weather Service Tallahassee FL
500 PM EDT Tue May 11 2021

.NEAR TERM [Through Wednesday]...

The seabreeze is helping to kickoff scattered convection over the
Florida Big Bend this afternoon, with plenty of outflow collisions
helping to fire off new updrafts. However, with rather weak shear in
place, these storms are remaining fairly well behaved. Farther to
the west, more organized convection is being driven by an
approaching shortwave in the zonal 500mb flow. Effective shear is a
bit stronger in this area (30-40kt), which may support some isolated
severe wind gusts as the MCS approaches and move across the area
this evening. Most guidance eventually weakens this feature as it
moves into southern Georgia later in the evening. However, sunrise
Wednesday, an additional round of thunderstorms may approach the
western counties.

This next round of thunderstorms will move across the area during
the morning into the afternoon hours, with a low end risk of some
isolated damaging wind gusts.

Otherwise, temperatures will begin to cool on Wednesday as the
frontal boundary finally begins to push southward. Expect highs to
range from the upper 70s in the northern counties, to the upper 80s
in the far southeastern Big Bend.

.SHORT TERM [Wednesday Night Through Thursday Night]...

As the cold front continues to push southward Wednesday night into
Thursday we can expect shower and thunderstorm activity to begin
winding down as we transition into N-NE flow overnight. The cold
front is anticipated to be out of the area by Thursday afternoon
with cloudy conditions remaining in place through Friday morning.
Expect overnight lows to generally be in the mid to upper 50s with
daytime highs generally in the mid 60s in our northernmost counties
in SE AL and SE GA and generally in the mid 70s near the Gulf
Coast.

.LONG TERM [Friday Through Tuesday]...

Upper-level troughing will transition into ridging behind the cold
front. Surface high pressure pushes southeast bringing with it
relatively cooler and drier air for the weekend. This surface high
pressure then shifts eastward throughout the weekend and places us
back under southerly flow ahead of our next chance for precip early
next week. A frontal system moving towards NE CONUS is expected to
elongate and leave behind a stationary boundary across our area
early next week, leading to another round of unsettled weather
through the end of the long term. Expect a warming trend through
the long term with overnight lows generally in the mid 50s on
Friday increasing to the mid 60s by Tuesday. Expect daytime highs
generally in the mid 70s on Friday increasing to the upper 80s by
Tuesday.

&&

.AVIATION...
[Through 18Z Wednesday]

Scattered storms will impact KTLH and KVLD early this afternoon
before shifting to the western terminals later in the afternoon
into the evening. Activity should diminish overnight. However, IFR
cigs are expected at all terminals. Additional showers and a few
thunderstorms are expected again on Wednesday spreading from west
to east beginning in the morning hours.

&&

.MARINE...

Outside of possible showers and thunderstorms, winds and seas will
remain below headline levels through the middle of the week, as a
front remains stalled near the waters. The front will sag southward
by Thursday, with high pressure building in from the north. This may
allow for offshore winds to approach exercise caution levels from
Thursday through Sunday.

&&

.FIRE WEATHER...

Rain chances will remain elevated into Thursday, with no fire
weather concerns.

&&

.HYDROLOGY...

Cold front will sag into the area today and Wednesday then off the
Gulf coast Wednesday night. Good chances of rain will occur through
Thursday then end from west to east Thursday afternoon. Generally 1-
2 inches of rainfall will occur; the heavier side of those amounts
will fall through SE AL and SW GA. Some isolated higher amounts
could also occur if training of storms set up near the front. Beyond
Thursday, a dry forecast is in store into the weekend.

&&

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested. However, spotters are always
encouraged to safely report significant weather conditions when they
occur (while following all local, state, and CDC guidelines) by
calling the office or tweeting us @NWSTallahassee.

&&

.PRELIMINARY POINT TEMPS/POPS...

Tallahassee   68  85  60  71  55 /  40  60  40  40  10
Panama City   69  82  62  74  57 /  20  40  50  40  10
Dothan        65  77  56  66  52 /  70  80  50  40  10
Albany        67  80  55  64  53 /  50  70  50  50  10
Valdosta      66  85  58  68  54 /  40  80  40  40  10
Cross City    68  88  65  77  58 /   0  10  20  30  10
Apalachicola  69  82  64  74  57 /  10  20  40  40  10

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
FL...None.
GA...None.
AL...None.
GM...None.
&&

NEAR TERM...Camp
SHORT TERM...Oliver
LONG TERM...Oliver
AVIATION...Camp
MARINE...Oliver
FIRE WEATHER...Camp
HYDROLOGY...Oliver

In the hours before

Special weather statement, May 11, 3:18 PM CDT, 48 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
318 PM CDT Tue May 11 2021

FLZ008>010-108-112100-
Central Walton FL-Holmes FL-South Walton FL-Washington FL-
318 PM CDT Tue May 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WALTON...
SOUTHWESTERN HOLMES AND WESTERN WASHINGTON COUNTIES UNTIL 400 PM
CDT...

At 318 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles south of De Funiak Springs to 14 miles
northwest of Vernon. Movement was southeast at 15 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Vernon, De Funiak Springs, Eglin Air Force Base, Live Oak, Freeport,
Ponce De Leon, Westville, Ebro, Hinsons Crossroads, Red Bay, Douglass
Crossroad, Rock Hill, Bruce, Red Head, Eucheeanna, Holmes Valley,
Millers Ferry, Knox Hill and Bunker.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3071 8613 3071 8604 3074 8604 3080 8589
      3055 8565 3039 8600 3038 8612 3039 8610
      3040 8612 3042 8612 3042 8614 3043 8612
      3043 8615 3045 8616 3047 8613 3048 8614
      3047 8615 3067 8622
TIME...MOT...LOC 2018Z 332DEG 15KT 3063 8610 3070 8592

42-DVD

Special weather statement, May 11, 3:53 PM CDT, 13 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
353 PM CDT Tue May 11 2021

FLZ007>010-108-112200-
Central Walton FL-Holmes FL-South Walton FL-North Walton FL-
Washington FL-
353 PM CDT Tue May 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR WALTON...HOLMES AND CENTRAL
WASHINGTON COUNTIES UNTIL 500 PM CDT...

At 353 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Laurel Hill to Lake Lorraine. Movement was
east at 25 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Vernon, Santa Rosa Beach, De Funiak Springs, Bonifay, Eglin Air Force
Base, Union, Liberty, Live Oak, Freeport, Paxton, Ponce De Leon,
Caryville, Esto, Westville, Ebro, Noma, Oakwood Hills, Cluster
Springs, Whitehead Crossroads and Villa Tasso.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 8616 3039 8611 3044 8616
      3047 8613 3046 8619 3050 8620 3046 8639
      3099 8639 3099 8558 3044 8571 3044 8586
      3037 8600 3036 8639 3040 8639
TIME...MOT...LOC 2053Z 265DEG 23KT 3097 8640 3043 8656

42-DVD

Special weather statement, May 11, 4:01 PM CDT, 5 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
401 PM CDT Tue May 11 2021

ALZ065-068-112145-
Coffee AL-Geneva AL-
401 PM CDT Tue May 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR COFFEE AND WESTERN GENEVA
COUNTIES UNTIL 445 PM CDT...

At 401 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles northwest of Opp to near Florala.
Movement was east at 30 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Elba, Geneva, Enterprise, Fort Rucker, Samson, New Brockton, Kinston,
Coffee Springs, Mixons Crossroads, Curtis, Carl Folsom A/p, Central
City, Logan Field Municipal A/P, Camp Humming Hills, Clintonville,
Camp Alaflo Bsa, Enterprise Municipal A/P, Earlytown, Spears and
Pera.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3146 8620 3152 8579 3120 8579 3114 8578
      3099 8577 3099 8619
TIME...MOT...LOC 2101Z 268DEG 26KT 3137 8633 3098 8632

42-DVD

Special weather statement, May 11, 4:06 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
406 PM CDT Tue May 11 2021

FLZ010-112145-
Washington FL-
406 PM CDT Tue May 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WASHINGTON COUNTY
UNTIL 445 PM CDT...

At 406 PM CDT, Doppler radar was tracking a strong thunderstorm near
Vernon, moving northeast at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Vernon, Chipley, Bradford, Wausau, Gilberts Mill, Brock Crossroad,
Chipley Municipal Airport, Orange Hill, Smyrna, Spring Hollow, Sunny
Hills and Sylvania.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm 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 3069 8569 3081 8548 3078 8548 3079 8543
      3070 8543 3057 8544 3053 8569
TIME...MOT...LOC 2106Z 246DEG 10KT 3062 8562

42-DVD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 3:18 PM CDT	Special Weather Statement	TAE	Walton	42 min
May 11, 3:53 PM CDT	Special Weather Statement	TAE	Holmes, Walton	67 min
May 11, 4:15 PM CDT	Special Weather Statement	TAE	Washington	45 min
May 11, 4:18 PM CDT	Special Marine Warning	TAE		117 min
May 11, 4:46 PM CDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Jackson, Washington	61 min
May 11, 5:34 PM CDT	Areal Flood Advisory	TAE	Jackson	116 min
May 11, 5:55 PM CDT	Special Weather Statement	TAE	Seminole	50 min
May 11, 6:19 PM CDT	Areal Flood Advisory	TAE	Decatur	3 hr
May 11, 6:43 PM CDT	Special Weather Statement	TAE	Decatur, Grady	32 min
May 11, 6:45 PM CDT	Flash Flood Warning	TAE	Decatur	3 hr
May 11, 4:01 PM CDT	Special Weather Statement	TAE	Coffee, Geneva	44 min
May 11, 4:59 PM CDT	Special Weather Statement	TAE	Henry	46 min

Nearby

Special Weather Statements in Florida, 2021 Every special weather statement in 2021

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.