Alert archive / Florida / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 3, NWS Miami, FL

January 17, 2016Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jan 17, 2016, 7:11 AM EST for Palm Beach County, Florida. It was in force for 34 min. 5 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
Jan 17, 2016, 7:11 AM EST (12:11 UTC)
Expired
Jan 17, 2016, 7:45 AM EST
In force
34 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 125 km from the middle of the area, began a volume at 12:14 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
Jan 17, 7:15 AM ESTTSTM WND DMG1 Ene The Acreage, FLLARGE TREE DOWN. TIME ESTIMATED FROM TDWR PBI RADAR. PICTURE FROM SOCIAL MEDIA.
Jan 17, 7:20 AM ESTTSTM WND DMG2 W Juno Beach, FLA TRAINED WEATHER SPOTTER REPORTED SEVERAL 2 INCH BRANCHES DOWN OFF OF THE TOP OF TREES. THESE BRANCHES WERE SNAPPED AND THEY ARE IN THE ROAD.
Jan 17, 7:25 AM ESTTSTM WND GST 492 N Florida Gardens, FLMEASURED AT WEATHERBUG SITE AT OKEEHEELEE GOLF COURSE
Jan 17, 7:31 AM ESTTSTM WND GST 472 Ese Haverhill, FLMEASURED AT PALM BEACH INTERNATIONAL AIRPORT - KPBI
Jan 17, 7:39 AM ESTTSTM WND DMG3 Ssw Boca West, FLSEVERAL TREES DOWN IN SANDALFOOT COVE NEIGHBORHOOD. PICTURE FROM SOCIAL MEDIA. TIME ESTIMATED BY RADAR.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jan 17, 12:47 AM ESTTornado WatchSPC8 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 0.2 hours before the alert went out and 100 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 2016-01-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 760 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, Miami, FL at 12:00Z on 2016-01-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 511 square meters per square second.1939587897117Sfc1 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
760 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
723 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
511 m²/s²
0-3 km storm-relative helicity
486 m²/s²
Significant tornado parameter
2.4
Supercell composite
9.2

Open this sounding in Storm Lab

The text

As transmitted.

749 
WUUS52 KMFL 171211
SVRMFL
FLC099-171245-
/O.NEW.KMFL.SV.W.0003.160117T1211Z-160117T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
711 AM EST SUN JAN 17 2016

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN PALM BEACH COUNTY IN SOUTHEASTERN FLORIDA...

* UNTIL 745 AM EST

* AT 711 AM EST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 6 MILES NORTHEAST OF NORTH COUNTY AIRPORT TO 10
  MILES NORTHWEST OF CORAL SPRINGS...MOVING EAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  WEST PALM BEACH...BOCA RATON...DEERFIELD BEACH...BOYNTON BEACH AND
  DELRAY BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 AM EST FOR SOUTHEASTERN
FLORIDA.

LAT...LON 2660 8005 2659 8005 2662 8004 2632 8008
      2633 8048 2696 8022 2697 8009 2680 8004
      2683 8004 2680 8003 2678 8003 2680 8005
      2670 8005 2677 8004 2672 8003
TIME...MOT...LOC 1211Z 268DEG 38KT 2693 8017 2637 8040 

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

PS
1 follow-up statement
254 
WWUS52 KMFL 171244
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
744 AM EST SUN JAN 17 2016

FLC099-171254-
/O.EXP.KMFL.SV.W.0003.000000T0000Z-160117T1245Z/
PALM BEACH FL-
744 AM EST SUN JAN 17 2016

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN PALM BEACH COUNTY WILL
EXPIRE AT 745 AM EST...
    
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND EXITED THE WARNED AREA. THEREFORE THE WARNING WILL BE
ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 AM EST FOR SOUTHEASTERN
FLORIDA.

LAT...LON 2660 8005 2659 8005 2662 8004 2632 8008
      2633 8048 2696 8022 2697 8009 2680 8004
      2683 8004 2680 8003 2678 8003 2680 8005
      2670 8005 2677 8004 2672 8003
TIME...MOT...LOC 1241Z 268DEG 38KT 2693 8017 2637 8040 

$$

PS

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 17, 1:36 AM ESTSpecial Marine WarningMFL39 min
Jan 17, 1:48 AM ESTSpecial Marine WarningMFL42 min
Jan 17, 3:28 AM ESTSpecial Marine WarningMFL62 min
Jan 17, 3:52 AM ESTSpecial Marine WarningMFL83 min
Jan 17, 5:00 AM ESTSpecial Weather StatementMFLCollier, Hendry60 min
Jan 17, 5:08 AM ESTSpecial Weather StatementMFLGlades82 min
Jan 17, 5:17 AM ESTTornado WarningMFLCollier28 min
Jan 17, 5:31 AM ESTSpecial Marine WarningMFL59 min
Jan 17, 5:46 AM ESTSpecial Weather StatementMFLBroward, Collier, Hendry, Monroe, Palm Beach59 min
Jan 17, 5:47 AM ESTSpecial Marine WarningMFL58 min
Jan 17, 6:12 AM ESTTornado WarningMFLGlades, Hendry, Palm Beach33 min
Jan 17, 6:45 AM ESTSpecial Weather StatementMFLPalm Beach60 min
Jan 17, 6:57 AM ESTSpecial Marine WarningMFL48 min
Jan 17, 7:03 AM ESTSpecial Weather StatementMFLBroward, Miami-Dade, Monroe57 min
Jan 17, 7:07 AM ESTSpecial Marine WarningMFL113 min
Jan 17, 7:31 AM ESTSpecial Marine WarningMFL119 min
Jan 17, 7:49 AM ESTSpecial Weather StatementMFLPalm Beach11 min
Jan 17, 8:48 AM ESTSpecial Marine WarningMFL117 min
Jan 17, 8:55 AM ESTSpecial Marine WarningMFL35 min

Nearby

Severe Thunderstorm Warnings in Florida, 2016Every severe thunderstorm warning in 2016

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.