Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 44, NWS Miami, FL

October 28, 2017Palm Beach County, Florida

NWS Miami, FL issued this tornado warning at Oct 28, 2017, 5:39 PM EDT for Palm Beach County, Florida. It was in force for 21 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Oct 28, 2017, 5:39 PM EDT (21:39 UTC)
Expired
Oct 28, 2017, 6:00 PM EDT
In force
21 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 117 km from the middle of the area, began a volume at 21:41 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.

What was reported inside it

TimeReportWhereRemark
Oct 28, 5:42 PM EDTTORNADO2 Nw Boynton Beach, FLDAMAGE TO MULTIPLE MOBILE HOMES AT A TRAILER PARK NEAR INTERSECTION OF NW 22ND AVE AND LAWRENCE RD IN BOYNTON BEACH. LIKELY TORNADO. TIME ESTIMATED VIA RADAR.
Oct 28, 6:08 PM EDTTSTM WND GST 752 Ne Palm Springs, FLSOUTH FLORIDA WATER MANAGEMENT DISTRICT MESONET SITE FHCHS NEAR INTERSECTION OF FOREST HILL BLVD AND INTERSTATE 95 MEASURED A WIND GUST TO 75 MPH. LIKELY ASSOCIATED WITH A TORNADO. TIME ESTIMATED BY RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 9.7 hours before the alert went out and 92 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, Miami, FL at 12:00Z on 2017-10-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2017-10-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.193958Sfc1 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
31 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
897 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

047 
WFUS52 KMFL 282139
TORMFL
FLC099-282200-
/O.NEW.KMFL.TO.W.0044.171028T2139Z-171028T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Miami FL
539 PM EDT SAT OCT 28 2017

The National Weather Service in Miami has issued a

* Tornado Warning for...
  East central Palm Beach County in southeastern Florida...

* Until 600 PM EDT
    
* At 539 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Boynton Beach, moving north at 25 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Lantana around 545 PM EDT. 
  Palm Beach and Atlantis around 550 PM EDT. 
  Lake Worth, Greenacres and Palm Springs around 555 PM EDT. 
  Wellington, Royal Palm Beach, Haverhill, Cloud Lake, Lake 
  Belvedere Estates, Royal Palm Estates, Gun Club Estates, Golden 
  Lakes, Schall Circle and Palm Beach International Airport around 
  600 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Lakeside Green, Aberdeen, Glen Ridge, Plantation Mobile Home Park,
Lake Worth Corridor, Aberdeen Golf Course, Lake Clarke Shores, Stacey
Street, Florida Gardens and Century Village.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 2665 8003 2650 8007 2650 8018 2673 8026
      2674 8003
TIME...MOT...LOC 2139Z 177DEG 20KT 2655 8014 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$
1 follow-up statement
118 
WWUS52 KMFL 282156
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
556 PM EDT SAT OCT 28 2017

FLC099-282206-
/O.EXP.KMFL.TO.W.0044.000000T0000Z-171028T2200Z/
Palm Beach FL-
556 PM EDT SAT OCT 28 2017

...THE TORNADO WARNING FOR EAST CENTRAL PALM BEACH COUNTY WILL EXPIRE
AT 600 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire.

LAT...LON 2665 8003 2650 8007 2650 8018 2673 8026
      2674 8003
TIME...MOT...LOC 2156Z 177DEG 20KT 2664 8015 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 28, 12:29 AM EDTSmall Craft AdvisoryMFL5 hr
Oct 28, 12:29 AM EDTTropical Storm WarningMFL32 hr
Oct 28, 4:59 AM EDTSmall Craft AdvisoryMFL47 hr
Oct 28, 10:18 AM EDTFlood WatchMFLBroward, Collier, Miami-Dade, Monroe, Palm Beach19 hr
Oct 28, 11:17 AM EDTTropical Storm WatchMFLMiami-Dade18 hr
Oct 28, 11:40 AM EDTRip Current StatementMFLBroward, Palm Beach17 hr
Oct 28, 1:18 PM EDTTornado WarningMFLMiami-Dade27 min
Oct 28, 2:24 PM EDTSpecial Marine WarningMFL36 min
Oct 28, 4:32 PM EDTSpecial Marine WarningMFL43 min
Oct 28, 6:10 PM EDTTornado WarningMFLPalm Beach20 min
Oct 28, 6:14 PM EDTSpecial Marine WarningMFL31 min
Oct 28, 6:26 PM EDTTornado WarningMFLPalm Beach22 min
Oct 28, 6:58 PM EDTSpecial Marine WarningMFL32 min
Oct 28, 7:04 PM EDTAreal Flood AdvisoryMFLPalm Beach3 hr
Oct 28, 7:14 PM EDTAreal Flood AdvisoryMFLPalm Beach3 hr
Oct 28, 7:27 PM EDTSpecial Marine WarningMFL33 min

Nearby

Tornado Warnings in Florida, 2017Every tornado warning in 2017Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.