Alert archive / Florida / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 13, NWS Miami, FL

April 4, 2013Broward County, Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 4, 2013, 4:42 PM EDT for Broward County, Palm Beach County, Florida. It was in force for 33 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: Apr 4, 2013, 4:42 PM EDT (20:42 UTC)
Expired: Apr 4, 2013, 5:15 PM EDT
In force: 33 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

Counties Broward County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 85 km from the middle of the area, began a volume at 20:42 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 4, 12:14 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 8.7 hours before the alert went out and 69 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: 124 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

018 
WUUS52 KMFL 042042
SVRMFL
FLC011-099-042115-
/O.NEW.KMFL.SV.W.0013.130404T2042Z-130404T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
442 PM EDT THU APR 4 2013

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BROWARD COUNTY IN SOUTH FLORIDA.
  SOUTH CENTRAL PALM BEACH COUNTY IN SOUTH FLORIDA.

* UNTIL 515 PM EDT

* AT 436 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER
  WEST CENTRAL BROWARD COUNTY...AND MOVING EAST AT 15 MPH.

* THE STORM WILL AFFECT...
  RURAL NORTHWESTERN BROWARD COUNTY
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH AND
OR LARGE HAIL. FREQUENT TO EXCESSIVE LIGHTNING AND HEAVY RAINFALL IS
ALSO POSSIBLE. IF THE STORM APPROACHES YOUR LOCATION, SEEK SHELTER IN
AN ENCLOSED BUILDING ON THE LOWEST FLOOR AND STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING
FOR SOUTHERN FLORIDA.

&&

LAT...LON 2651 8055 2622 8053 2617 8087 2629 8087
TIME...MOT...LOC 2043Z 255DEG 13KT 2625 8079

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 2:25 PM EDT	Special Weather Statement	MFL	Glades	35 min
Apr 4, 2:34 PM EDT	Special Marine Warning	MFL		56 min
Apr 4, 2:38 PM EDT	Special Marine Warning	MFL		52 min
Apr 4, 2:55 PM EDT	Special Weather Statement	MFL	Martin	35 min
Apr 4, 3:13 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	32 min
Apr 4, 3:16 PM EDT	Special Weather Statement	MFL	Broward	44 min
Apr 4, 3:26 PM EDT	Special Marine Warning	MFL		64 min
Apr 4, 3:31 PM EDT	Special Weather Statement	MFL	Hendry	29 min
Apr 4, 3:37 PM EDT	Special Marine Warning	MFL		68 min
Apr 4, 3:45 PM EDT	Special Weather Statement	MFL	Martin	30 min
Apr 4, 3:51 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	24 min
Apr 4, 3:52 PM EDT	Special Weather Statement	MFL	Broward	38 min
Apr 4, 3:53 PM EDT	Special Marine Warning	MFL		37 min
Apr 4, 4:07 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	38 min
Apr 4, 4:13 PM EDT	Special Weather Statement	MFL	Palm Beach	32 min
Apr 4, 4:20 PM EDT	Special Weather Statement	MFL	Palm Beach	25 min
Apr 4, 4:29 PM EDT	Special Marine Warning	MFL		46 min
Apr 4, 4:29 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	31 min
Apr 4, 4:32 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	58 min
Apr 4, 4:34 PM EDT	Special Marine Warning	MFL		41 min
Apr 4, 4:38 PM EDT	Special Weather Statement	MFL	Broward, Palm Beach	52 min
Apr 4, 4:39 PM EDT	Severe Thunderstorm Warning	MFL	Broward	36 min
Apr 4, 4:54 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	36 min
Apr 4, 4:59 PM EDT	Special Marine Warning	MFL		61 min
Apr 4, 5:11 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	49 min
Apr 4, 5:13 PM EDT	Small Craft Advisory	MFL		36 hr
Apr 4, 5:14 PM EDT	Special Marine Warning	MFL		61 min
Apr 4, 5:29 PM EDT	Special Weather Statement	MFL	Broward	61 min
Apr 4, 5:31 PM EDT	Special Marine Warning	MFL		59 min
Apr 4, 5:48 PM EDT	Severe Thunderstorm Warning	MFL	Broward	27 min
Apr 4, 5:53 PM EDT	Special Weather Statement	MFL	Broward	52 min
Apr 4, 6:11 PM EDT	Special Marine Warning	MFL		64 min
Apr 4, 6:34 PM EDT	Special Marine Warning	MFL		56 min
Apr 4, 6:45 PM EDT	Special Weather Statement	MFL	Monroe	45 min
Apr 4, 7:21 PM EDT	Special Marine Warning	MFL		54 min

Nearby

Severe Thunderstorm Warnings in Florida, 2013 Every severe thunderstorm warning in 2013

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.