Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 49, NWS Miami, FL

June 17, 2011Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 17, 2011, 4:33 PM EDT for Palm Beach County, Florida. It was in force for 42 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: Jun 17, 2011, 4:33 PM EDT (20:33 UTC)
Expired: Jun 17, 2011, 5:15 PM EDT
In force: 42 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 106 km from the middle of the area, began a volume at 20:34 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 12:00Z, 8.6 hours before the alert went out and 90 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: 2398 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: -56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

639 
WUUS52 KMFL 172033
SVRMFL
FLC099-172115-
/O.NEW.KMFL.SV.W.0049.110617T2033Z-110617T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
433 PM EDT FRI JUN 17 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN PALM BEACH COUNTY IN SOUTH FLORIDA.

* UNTIL 515 PM EDT

* AT 430 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED 4 MILES SOUTHWEST OF HOLEY LAND WILDLIFE MANAGEMENT AREA...
  AND MOVING NORTH AT 15 MPH.

* THE STORM WILL AFFECT...
  ROTENBERGER WILDLIFE MANAGEMENT AREA...
  HOLEY LAND WILDLIFE MANAGEMENT AREA...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 60
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 60
MPH...HAIL UP TO GOLF BALL SIZE...DEADLY LIGHTNING...AND VERY HEAVY
RAINFALL. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 2665 8066 2633 8065 2633 8086 2643 8088
      2666 8089
TIME...MOT...LOC 2033Z 173DEG 13KT 2639 8076

$$

GREGORIA

1 follow-up statement

131 
WWUS52 KMFL 172051
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
451 PM EDT FRI JUN 17 2011

FLC099-172115-
/O.CON.KMFL.SV.W.0049.000000T0000Z-110617T2115Z/
PALM BEACH FL-
451 PM EDT FRI JUN 17 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHWESTERN PALM BEACH COUNTY...

AT 447 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS OF 60 TO 70 MPH. THIS STORM WAS
LOCATED NEAR ROTENBERGER WILDLIFE MANAGEMENT AREA...MOVING NORTH AT
15 MPH. THIS STORM WILL CONTINUE TO AFFECT SOUTHWESTERN RURAL PALM 
BEACH COUNTY.

LAT...LON 2665 8066 2633 8065 2633 8086 2643 8088
      2666 8089
TIME...MOT...LOC 2050Z 173DEG 13KT 2643 8079

$$

GREGORIA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 8:10 PM EDT	Special Weather Statement	MFL	Collier	50 min
Jun 17, 3:36 PM EDT	Special Weather Statement	MFL	Palm Beach	39 min
Jun 17, 3:43 PM EDT	Special Weather Statement	MFL	Collier	47 min
Jun 17, 4:23 PM EDT	Special Weather Statement	MFL	Hendry	37 min
Jun 17, 4:30 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	37 min
Jun 17, 4:57 PM EDT	Special Marine Warning	MFL		2 hr
Jun 17, 5:06 PM EDT	Special Weather Statement	MFL	Palm Beach	24 min
Jun 17, 5:12 PM EDT	Severe Thunderstorm Warning	MFL	Glades, Hendry, Palm Beach	38 min
Jun 17, 5:34 PM EDT	Special Weather Statement	MFL	Glades	26 min
Jun 17, 5:57 PM EDT	Special Weather Statement	MFL	Glades	48 min
Jun 17, 6:01 PM EDT	Severe Thunderstorm Warning	MFL	Glades, Hendry	59 min
Jun 17, 6:30 PM EDT	Areal Flood Advisory	MFL	Glades, Hendry	109 min
Jun 17, 7:01 PM EDT	Special Weather Statement	MFL	Hendry	29 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

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.