Alert archive / Florida / Tornado Warnings in 2007

Tornado Warning 16, NWS Miami, FL

July 21, 2007Palm Beach County, Florida

NWS Miami, FL issued this tornado warning at Jul 21, 2007, 3:27 PM EDT for Palm Beach County, Florida. It was in force for 15 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: Jul 21, 2007, 3:27 PM EDT (19:27 UTC)
Expired: Jul 21, 2007, 3:42 PM EDT
In force: 15 min
Issued by: NWS Miami, FL
Area: Counties, with a storm outline in the text

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 97 km from the middle of the area, began a volume at 19:30 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
Jul 21, 3:35 PM EDT	FUNNEL CLOUD	Boca Raton, FL	SHERIFFS OFFICE REPORTED A FUNNEL CLOUD AT PALMETTO PARK AND POWERLINE ROAD. NO TOUCHDOWN.

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.

Issued	Product	Office	Lasted
Jul 21, 11:22 AM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 7.5 hours before the alert went out and 71 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: 1339 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: -2 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.

000 
WFUS52 KMFL 211928
TORMFL
FLC099-212030-
/O.NEW.KMFL.TO.W.0016.070721T1927Z-070721T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
327 PM EDT SAT JUL 21 2007

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 430 PM EDT

* AT 326 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES WEST 
  OF DELRAY BEACH...MOVING EAST AT 1O T 15 MPH.

  THIS STORM IS ALSO CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE TORNADO WILL BE NEAR...

  DELRAY BEACH...

AND SURROUNDING COMMUNITIES.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR COULD POSSIBLY DEVELOP ANYTIME. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
SATURDAY EVENING FOR SOUTHERN FLORIDA.

LAT...LON 2649 8022 2645 8024 2622 7989 2647 7979

$$

BAXTER

1 follow-up statement

000
WWUS52 KMFL 211942
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
338 PM EDT SAT JUL 21 2007

FLC099-211948-
/O.CAN.KMFL.TO.W.0016.000000T0000Z-070721T2030Z/
PALM BEACH FL-
338 PM EDT SAT JUL 21 2007

...THE TORNADO WARNING FOR SOUTHEASTERN PALM BEACH COUNTY IS
CANCELLED...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE TORNADO HAS
DISSIPATED. THUS THE TORNADO WARNING HAS BEEN CANCELLED. HOWEVER...A 
SEVERE THUNDERSTORM WARNING IS STILL IN EFFECT FOR THIS AREA UNTIL
415 PM EDT. FREQUENT LIGHTNING STRIKES...GUSTY WINDS TO
60 MPH...VERY HEAVY RAINFALL AND HAIL UP TO QUARTER SIZE ARE STILL
POSSIBLE WITH THIS STORM. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL
MEDIA FOR THE LATEST UPDATES.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
SATURDAY EVENING FOR SOUTHERN FLORIDA.

LAT...LON 2649 8022 2645 8024 2622 7989 2647 7979

$$

BAXTER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 8:02 PM EDT	Marine Weather Statement	MFL		58 min
Jul 20, 8:50 PM EDT	Special Marine Warning	MFL		25 min
Jul 20, 9:39 PM EDT	Marine Weather Statement	MFL		66 min
Jul 21, 10:32 AM EDT	Marine Weather Statement	MFL		58 min
Jul 21, 1:22 PM EDT	Severe Thunderstorm Warning	MFL	Hendry	53 min
Jul 21, 1:38 PM EDT	Severe Thunderstorm Warning	MFL	Glades	58 min
Jul 21, 1:42 PM EDT	Special Marine Warning	MFL		2 hr
Jul 21, 2:17 PM EDT	Severe Thunderstorm Warning	MFL	Hendry, Palm Beach	50 min
Jul 21, 2:27 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	63 min
Jul 21, 2:35 PM EDT	Areal Flood Advisory	MFL	Palm Beach	3 hr
Jul 21, 3:04 PM EDT	Severe Thunderstorm Warning	MFL	Broward	56 min
Jul 21, 3:13 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	37 min
Jul 21, 3:14 PM EDT	Tornado Warning	MFL	Miami-Dade	34 min
Jul 21, 3:20 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	55 min
Jul 21, 3:59 PM EDT	Severe Thunderstorm Warning	MFL	Broward	61 min
Jul 21, 7:31 PM EDT	Marine Weather Statement	MFL		59 min

Nearby

Tornado Warnings in Florida, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.