Alert archive / Florida / Tornado Warnings in 2009

Tornado Warning 1, NWS Miami, FL

March 31, 2009Palm Beach County, Florida

NWS Miami, FL issued this tornado warning at Mar 31, 2009, 3:12 PM EDT for Palm Beach County, Florida. It was in force for 33 min. 1 report 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: Mar 31, 2009, 3:12 PM EDT (19:12 UTC)
Expired: Mar 31, 2009, 3:45 PM EDT
In force: 33 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 136 km from the middle of the area, began a volume at 19:13 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

Time	Report	Where	Remark
Mar 31, 3:30 PM EDT	TORNADO 0	Palm Beach Gardens, FL	PICTURES SENT TO NWS BY MEDIA SHOW EVIDENCE OF SMALL TORNADO NEAR THE TIME THE CIRCULATION WAS EVIDENT IN TPBI TDWR IN THE VICINITY OF PALM BEACH GARDENS. THIS COINCIDE ALSO WITH REAL TIME REPORTS RECEIVED BY TRAINED SPOTTERS OF A POSSIBLE TORNADO TOUCHDOWN BE

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, 7.2 hours before the alert went out and 111 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: 1332 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WFUS52 KMFL 311912
TORMFL
FLC099-311945-
/O.NEW.KMFL.TO.W.0001.090331T1912Z-090331T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
312 PM EDT TUE MAR 31 2009

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN PALM BEACH COUNTY IN SOUTH FLORIDA.

* UNTIL 345 PM EDT

* AT 310 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR PALM BEACH
  GARDENS...DRIFTING SOUTHEAST.

  THIS STORM IS ALSO CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
  60 MPH.

* THE TORNADO WILL BE NEAR...
  PALM BEACH GARDENS...
  NORTH PALM BEACH...
  RIVIERA BEACH...
  PORT OF PALM BEACH...
  AND SURROUNDING COMMUNITIES.

SOUTH FLORIDA TORNADOES MAY AT TIMES BE SMALL AND NARROW BUT THEY ARE
STILL DANGEROUS. THEY CAN EASILY FLIP A VEHICLE OR TRAILER OR CAUSE
LARGE TREES TO FALL. TAKE COVER INSIDE A STURDY BUILDING IMMEDIATELY.

LAT...LON 2677 8004 2678 8005 2676 8005 2672 8008
      2683 8019 2689 8013 2683 8004 2683 8003
      2683 8004 2681 8002 2679 8002
TIME...MOT...LOC 1911Z 321DEG 7KT 2683 8010

$$

GR

1 follow-up statement

273 
WWUS52 KMFL 311925
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
325 PM EDT TUE MAR 31 2009

FLC099-311945-
/O.CON.KMFL.TO.W.0001.000000T0000Z-090331T1945Z/
PALM BEACH FL-
325 PM EDT TUE MAR 31 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR
NORTHEASTERN PALM BEACH COUNTY...

AT 323 PM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION CAPABLE OF PRODUCING A
TORNADO. DAMAGING WINDS IN EXCESS OF 60 MPH ARE ALSO POSSIBLE. THIS
STORM WAS LOCATED JUST NORTHWEST OF RIVIERA BEACH...MOVING SOUTHEAST 
AT 10 MPH.

SOUTH FLORIDA TORNADOES MAY AT TIMES BE SMALL AND NARROW BUT THEY ARE
STILL DANGEROUS. THEY CAN EASILY FLIP A VEHICLE OR TRAILER OR CAUSE
LARGE TREES TO FALL. TAKE COVER INSIDE A STURDY BUILDING IMMEDIATELY.

LAT...LON 2677 8004 2678 8005 2676 8005 2672 8008
      2683 8019 2689 8013 2683 8004 2683 8003
      2683 8004 2681 8002 2679 8002
TIME...MOT...LOC 1924Z 321DEG 7KT 2681 8008

$$

GR

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 2:01 PM EDT	Special Weather Statement	MFL	Martin	89 min
Mar 31, 2:05 PM EDT	Areal Flood Advisory	MFL	Palm Beach	115 min
Mar 31, 2:23 PM EDT	Special Weather Statement	MFL	Martin	37 min
Mar 31, 2:33 PM EDT	Areal Flood Advisory	MFL	Palm Beach	87 min
Mar 31, 2:44 PM EDT	Areal Flood Advisory	MFL	Palm Beach	2 hr
Mar 31, 2:57 PM EDT	Special Marine Warning	MFL		93 min
Mar 31, 3:09 PM EDT	Special Weather Statement	MFL	Broward	51 min
Mar 31, 3:44 PM EDT	Tornado Warning	MFL	Palm Beach	40 min
Mar 31, 3:49 PM EDT	Special Weather Statement	MFL	Broward	56 min
Mar 31, 3:51 PM EDT	Special Marine Warning	MFL		54 min
Mar 31, 4:17 PM EDT	Areal Flood Advisory	MFL	Palm Beach	69 min
Mar 31, 4:18 PM EDT	Special Weather Statement	MFL	Miami-Dade	27 min
Mar 31, 4:29 PM EDT	Special Weather Statement	MFL	Palm Beach	31 min
Mar 31, 4:46 PM EDT	Areal Flood Warning	MFL	Palm Beach	3 hr
Mar 31, 4:53 PM EDT	Special Marine Warning	MFL		38 min
Mar 31, 4:57 PM EDT	Special Weather Statement	MFL	Miami-Dade	63 min
Mar 31, 5:56 PM EDT	Areal Flood Advisory	MFL	Palm Beach	21 min

Nearby

Tornado Warnings in Florida, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.