Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 16, NWS Miami, FL

July 31, 2017Palm Beach County, Florida

NWS Miami, FL issued this tornado warning at Jul 31, 2017, 9:59 PM EDT for Palm Beach County, Florida. It was in force for 31 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
Jul 31, 2017, 9:59 PM EDT (01:59 UTC)
Expired
Jul 31, 2017, 10:30 PM EDT
In force
31 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), 128 km from the middle of the area, began a volume at 02:02 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

Miami, FL (KMFL), launched 00:00Z, 2.0 hours before the alert went out and 107 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 00:00Z on 2017-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 579 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 00:00Z on 2017-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
579 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
817 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

311 
WFUS52 KMFL 010159
TORMFL
FLC099-010230-
/O.NEW.KMFL.TO.W.0016.170801T0159Z-170801T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Miami FL
959 PM EDT MON JUL 31 2017

The National Weather Service in Miami has issued a

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

* Until 1030 PM EDT
    
* At 959 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Belle Glade, moving northeast 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. 

* Locations impacted include...
  Belle Glade.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 2669 8039 2656 8063 2672 8065 2696 8052
      2696 8038
TIME...MOT...LOC 0159Z 226DEG 23KT 2671 8061 

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

$$

KScharf
2 follow-up statements
684 
WWUS52 KMFL 010211
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
1011 PM EDT MON JUL 31 2017

FLC099-010230-
/O.CON.KMFL.TO.W.0016.000000T0000Z-170801T0230Z/
Palm Beach FL-
1011 PM EDT MON JUL 31 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT FOR NORTH
CENTRAL PALM BEACH COUNTY...
    
At 1010 PM EDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Fremd Village-Padgett Island, or 7
miles southeast of Pahokee, moving northeast 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 tornadic thunderstorm will remain over mainly rural areas of
north central Palm Beach County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not take shelter under highway overpasses. If you
cannot safely drive away from the tornado, as a last resort, either
park your vehicle and stay put, or abandon your vehicle and lie down
in a low lying area and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 2660 8055 2680 8061 2696 8052 2696 8038
      2669 8039
TIME...MOT...LOC 0210Z 226DEG 23KT 2676 8055 

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

$$

KScharf
404 
WWUS52 KMFL 010228
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
1028 PM EDT MON JUL 31 2017

FLC099-010238-
/O.EXP.KMFL.TO.W.0016.000000T0000Z-170801T0230Z/
Palm Beach FL-
1028 PM EDT MON JUL 31 2017

...THE TORNADO WARNING FOR NORTH CENTRAL PALM BEACH COUNTY WILL
EXPIRE AT 1030 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 2660 8055 2680 8061 2696 8052 2696 8038
      2669 8039
TIME...MOT...LOC 0228Z 226DEG 23KT 2684 8046 

$$

KScharf

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 8:11 PM EDTSpecial Weather StatementMFLPalm Beach64 min
Jul 31, 8:41 PM EDTSpecial Marine WarningMFL64 min
Jul 31, 9:03 PM EDTSpecial Marine WarningMFL57 min
Jul 31, 9:09 PM EDTSpecial Weather StatementMFLPalm Beach66 min
Jul 31, 10:16 PM EDTSpecial Weather StatementMFLBroward, Palm Beach59 min
Aug 1, 12:09 AM EDTAreal Flood AdvisoryMFLCollier3 hr
Aug 1, 12:18 AM EDTSpecial Weather StatementMFLCollier42 min
Aug 1, 12:30 AM EDTSpecial Marine WarningMFL60 min
Aug 1, 1:02 PM EDTSpecial Marine WarningMFL43 min
Aug 1, 1:58 PM EDTSpecial Marine WarningMFL62 min
Aug 1, 2:14 PM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
Aug 1, 3:06 PM EDTSpecial Marine WarningMFL24 min
Aug 1, 3:27 PM EDTSpecial Marine WarningMFL63 min
Aug 1, 3:47 PM EDTFlash Flood WarningMFLMiami-Dade118 min
Aug 1, 3:59 PM EDTSpecial Weather StatementMFLMiami-Dade61 min
Aug 1, 4:19 PM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
Aug 1, 4:48 PM EDTAreal Flood AdvisoryMFLMiami-Dade57 min
Aug 1, 5:46 PM EDTAreal Flood WarningMFLMiami-Dade4 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.