Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Tampa Bay, FL

August 28, 2018Pinellas County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 28, 2018, 5:19 PM EDT for Pinellas County, Florida. It was in force for 17 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
Aug 28, 2018, 5:19 PM EDT (21:19 UTC)
Expired
Aug 28, 2018, 5:36 PM EDT
In force
17 min
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Pinellas County, FL

The radar

The Tampa radar (KTBW), 26 km from the middle of the area, began a volume at 21:22 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

Tampa Bay, FL (KTBW), launched 12:00Z, 9.3 hours before the alert went out and 26 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, Tampa Bay, FL at 12:00Z on 2018-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1166 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, Tampa Bay, FL at 12:00Z on 2018-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
1166 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
967 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
10 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

170 
WUUS52 KTBW 282119
SVRTBW
FLC103-282200-
/O.NEW.KTBW.SV.W.0021.180828T2119Z-180828T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tampa Bay Area Ruskin FL
519 PM EDT TUE AUG 28 2018

The National Weather Service in Ruskin has issued a

* Severe Thunderstorm Warning for...
  Southeastern Pinellas County in west central Florida...

* Until 600 PM EDT.

* At 519 PM EDT, a severe thunderstorm was located over Downtown
  Saint Petersburg, moving west at 10 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Saint Petersburg, Downtown Saint Petersburg, St. Petersburg, St.
  Pete Beach, West And East Lealman, Gulfport, Kenneth City, South
  Pasadena, Albert Whitted Airport, Tropicana Field, Lealman, Vinoy
  Park, Lake Maggiore, Boyd Hill Nature Preserve, Crescent Lake and
  Pinellas Point.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2783 8270 2777 8256 2773 8257 2767 8265
      2774 8274
TIME...MOT...LOC 2119Z 109DEG 8KT 2775 8263 

HAIL...<.75IN
WIND...60MPH
 
$$

TBW
2 follow-up statements
860 
WWUS52 KTBW 282129
SVSTBW

Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
529 PM EDT TUE AUG 28 2018

FLC103-282200-
/O.CON.KTBW.SV.W.0021.000000T0000Z-180828T2200Z/
Pinellas FL-
529 PM EDT TUE AUG 28 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTH CENTRAL PINELLAS COUNTY...

At 528 PM EDT, a severe thunderstorm was located over Saint
Petersburg, moving west at 10 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Saint Petersburg, St. Petersburg, Gulfport, Kenneth City, South
Pasadena and Tropicana Field.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2781 8271 2778 8265 2776 8265 2773 8267
      2774 8274
TIME...MOT...LOC 2128Z 109DEG 8KT 2776 8265 

HAIL...<.75IN
WIND...60MPH
 
$$

TBW
928 
WWUS52 KTBW 282136
SVSTBW

Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
536 PM EDT TUE AUG 28 2018

FLC103-282146-
/O.CAN.KTBW.SV.W.0021.000000T0000Z-180828T2200Z/
Pinellas FL-
536 PM EDT TUE AUG 28 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL PINELLAS COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.

LAT...LON 2781 8271 2778 8265 2776 8265 2773 8267
      2774 8274
TIME...MOT...LOC 2134Z 109DEG 8KT 2777 8267 

$$

TBW

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 3:40 PM EDTSpecial Weather StatementTBWHernando35 min
Aug 28, 3:57 PM EDTSpecial Marine WarningTBW33 min
Aug 28, 4:38 PM EDTSpecial Marine WarningTBW97 min
Aug 28, 4:42 PM EDTSpecial Weather StatementTBWHillsborough, Manatee, Pasco, Pinellas, Sarasota63 min
Aug 28, 5:37 PM EDTSevere Thunderstorm WarningTBWPinellas23 min
Aug 28, 5:42 PM EDTAreal Flood AdvisoryTBWPinellas93 min
Aug 28, 6:11 PM EDTSpecial Marine WarningTBW64 min

Nearby

Severe Thunderstorm Warnings in Florida, 2018Every severe thunderstorm warning in 2018

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.