Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 48, NWS Miami, FL

May 27, 2012Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 27, 2012, 4:49 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 41 min. 5 reports 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: May 27, 2012, 4:49 PM EDT (20:49 UTC)
Expired: May 27, 2012, 5:30 PM EDT
In force: 41 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

Counties Broward County, FL, Miami-Dade County, FL

The radar

The Miami radar (KAMX), 49 km from the middle of the area, began a volume at 20:51 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
May 27, 4:49 PM EDT	HAIL 0.25	2 W Miramar, FL	A TRAINED SPOTTER REPORTED PEA-SIZED HAIL ALONG DYKES ROAD NEAR INTERSTATE 75.
May 27, 4:50 PM EDT	HAIL 0.75	2 W Miramar, FL	A TRAINED SPOTTER REPORTED PENNY-SIZED HAIL NEAR THE INTERSECTION OF INTERSTATE 75 AND MIRAMAR PARKWAY. SPOTTER ALSO ESTIMATED WIND GUSTS TO 50 MPH.
May 27, 4:53 PM EDT	HAIL 0.5	2 Nw Pembroke Pines, FL	A TRAINED SPOTTER REPORTED DIME-SIZED HAIL NEAR THE INTERSECTION OF SHERIDAN STREET AND INTERSTATE 75.
May 27, 5:05 PM EDT	TSTM WND GST 47	Davie, FL	BROADCAST MEDIA REPORTED A MESONET WIND GUST OF 41 KTS...OR 47 MPH...AT BECON/ITV IN DAVIE ON THE NORTH SIDE OF THE BROWARD COLLEGE CENTRAL CAMPUS.
May 27, 5:08 PM EDT	TSTM WND GST 60	2 S Plantation, FL	A TRAINED SPOTTER REPORTED ESTIMATED WIND SPEEDS OF 50 TO 60 MPH NEAR THE INTERSECTION OF SOUTHWEST 55TH AVENUE AND SOUTHWEST 19TH STREET. SPOTTER ALSO REPORTED FLYING DEBRIS.

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, 8.8 hours before the alert went out and 23 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: 563 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 15 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.

576 
WUUS52 KMFL 272049
SVRMFL
FLC011-086-272130-
/O.NEW.KMFL.SV.W.0048.120527T2049Z-120527T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
449 PM EDT SUN MAY 27 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BROWARD COUNTY IN SOUTH FLORIDA.
  NORTHEASTERN MIAMI-DADE COUNTY IN SOUTH FLORIDA.

* UNTIL 530 PM EDT

* AT 446 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
A   SEVERE THUNDERSTORM PRODUCING ONE INCH HAIL...AND DAMAGING WINDS 
IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR MIRAMAR...AND 
MOVING NORTHEAST AT 30 MPH.

* THE STORM WILL AFFECT...
  MIRAMAR...
  PEMBROKE PINES...
  PINES BLVD AND UNIVERSITY DRIVE...
  COOPER CITY...
  NOVA SOUTHEASTERN UNIVERSITY...
  PLANTATION...
  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.

FREQUENT LIGHTNING IS OCCURRING WITH THIS THUNDERSTORM. IF
OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES AND
AVOID WATER. MOVE INDOORS OR INSIDE A VEHICLE IF POSSIBLE. AVOID
USING THE TELEPHONE UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG
UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.

&&

LAT...LON 2615 8010 2613 8009 2600 8011 2591 8011
      2590 8010 2588 8012 2587 8015 2588 8015
      2587 8016 2582 8042 2601 8051 2616 8031
      2623 8009
TIME...MOT...LOC 2047Z 228DEG 25KT 2596 8036

$$

JE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 9:04 PM EDT	Special Weather Statement	MFL	Monroe	56 min
May 27, 4:36 AM EDT	Rip Current Statement	MFL	Palm Beach	25 hr
May 27, 3:05 PM EDT	Special Weather Statement	MFL	Broward	55 min
May 27, 3:29 PM EDT	Special Weather Statement	MFL	Palm Beach	61 min
May 27, 3:49 PM EDT	Special Weather Statement	MFL	Miami-Dade	56 min
May 27, 4:29 PM EDT	Special Weather Statement	MFL	Broward	61 min
May 27, 4:42 PM EDT	Special Marine Warning	MFL		63 min
May 27, 4:47 PM EDT	Special Weather Statement	MFL	Palm Beach	28 min
May 27, 4:59 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	61 min
May 27, 5:08 PM EDT	Special Marine Warning	MFL		82 min
May 27, 5:24 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	51 min
May 27, 5:47 PM EDT	Special Marine Warning	MFL		58 min
May 27, 6:00 PM EDT	Special Weather Statement	MFL	Glades	60 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Every severe thunderstorm warning in 2012

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.