Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 21, NWS Miami, FL

April 6, 2008Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 6, 2008, 9:42 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 48 min. 4 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: Apr 6, 2008, 9:42 PM EDT (01:42 UTC)
Expired: Apr 6, 2008, 10:30 PM EDT
In force: 48 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

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

The radar

The Miami radar (KAMX), 22 km from the middle of the area, began a volume at 01:42 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.

What was reported inside it

Time	Report	Where	Remark
Apr 6, 9:44 PM EDT	TSTM WND GST 64	Kendall, FL
Apr 6, 9:48 PM EDT	TSTM WND GST 0	Kendall, FL	WIND GUSTS TO 63 MPH AT MIAMI DADE COLLEGE
Apr 6, 9:48 PM EDT	TSTM WND GST 63	Kendall, FL	WIND GUSTS TO 63 MPH AT MIAMI DADE COLLEGE
Apr 6, 10:00 PM EDT	TSTM WND GST 58	7 Sw Miami, FL	58 MPH

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 00:00Z, 1.7 hours before the alert went out and 5 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: 1985 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 711 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KMFL 070142
SVRMFL
FLC011-086-070230-
/O.NEW.KMFL.SV.W.0021.080407T0142Z-080407T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
942 PM EDT SUN APR 6 2008

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 1030 PM EDT

* AT 937 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM MICCOSUKEE RESORT TO PINECREST...AND MOVING NORTH AT 38 MPH.

* THE LINE OF STORMS WILL AFFECT...

  WESTCHESTER...
  SWEETWATER...
  DORAL...
  EL PORTAL...
  INTERSECTION KROME AND U.S. 27...
  CAROL CITY...

AND SURROUNDING COMMUNITIES.

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. OR YOU CAN
ALSO CALL THE NATIONAL WEATHER SERVICE IN MIAMI DIRECTLY AT
305.229.4528 TO REPORT SEVERE WEATHER.

LAT...LON 2573 8023 2572 8024 2562 8028 2562 8029
      2567 8053 2610 8040 2600 8011
TIME...MOT...LOC 0142Z 194DEG 33KT 2581 8052 2573 8028

$$

TINGLER

2 follow-up statements

000
WWUS52 KMFL 070206
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1006 PM EDT SUN APR 6 2008

FLC011-086-070230-
/O.CON.KMFL.SV.W.0021.000000T0000Z-080407T0230Z/
BROWARD FL-MIAMI-DADE FL-
1006 PM EDT SUN APR 6 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR NORTHEASTERN MIAMI-DADE AND SOUTHEASTERN BROWARD COUNTIES...

AT 1003 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS PRODUCING NICKEL SIZE HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 7 MILES WEST OF MIRAMAR TO SAINT THOMAS
UNIVERSITY...MOVING NORTH AT 38 MPH.

LAT...LON 2573 8023 2571 8025 2577 8046 2610 8040
      2600 8011
TIME...MOT...LOC 0206Z 194DEG 33KT 2602 8046 2594 8022

$$

TINGLER

000
WWUS52 KMFL 070217
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1016 PM EDT SUN APR 6 2008

FLC011-086-070230-
/O.CON.KMFL.SV.W.0021.000000T0000Z-080407T0230Z/
BROWARD FL-MIAMI-DADE FL-
1016 PM EDT SUN APR 6 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR NORTHEASTERN MIAMI-DADE AND SOUTHEASTERN BROWARD COUNTIES...

AT 1013 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS PRODUCING THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTHWEST OF NORTH PERRY
AIRPORT TO AVENTURA...MOVING NORTH AT 38 MPH.

TRAINED SPOTTERS REPORTED PENNY SIZED HAIL ALONG WITH MESONET REPORTS 
OF 63 MPH WIND GUSTS.

LAT...LON 2579 8020 2580 8031 2607 8031 2600 8011
TIME...MOT...LOC 0216Z 194DEG 33KT 2607 8033 2597 8013

$$

TINGLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 8:27 PM EDT	Special Marine Warning	MFL		63 min
Apr 6, 8:28 PM EDT	Special Weather Statement	MFL	Palm Beach	32 min
Apr 6, 9:01 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	44 min
Apr 6, 9:05 PM EDT	Special Marine Warning	MFL		55 min
Apr 6, 9:11 PM EDT	Special Weather Statement	MFL	Collier	49 min
Apr 6, 9:16 PM EDT	Special Weather Statement	MFL	Broward	44 min
Apr 6, 9:19 PM EDT	Special Weather Statement	MFL	Glades	26 min
Apr 6, 9:46 PM EDT	Special Marine Warning	MFL		59 min
Apr 6, 9:58 PM EDT	Special Marine Warning	MFL		62 min
Apr 6, 10:05 PM EDT	Special Weather Statement	MFL	Glades, Hendry	40 min
Apr 6, 10:22 PM EDT	Severe Thunderstorm Warning	MFL	Broward	30 min
Apr 6, 10:25 PM EDT	Areal Flood Advisory	MFL	Glades	3 hr
Apr 6, 10:39 PM EDT	Special Marine Warning	MFL		96 min
Apr 6, 10:39 PM EDT	Special Weather Statement	MFL	Collier	51 min
Apr 6, 10:45 PM EDT	Special Marine Warning	MFL		60 min
Apr 6, 10:49 PM EDT	Special Weather Statement	MFL	Collier, Hendry	41 min
Apr 6, 11:03 PM EDT	Areal Flood Advisory	MFL	Palm Beach	3 hr
Apr 6, 11:24 PM EDT	Special Weather Statement	MFL	Palm Beach	51 min
Apr 6, 11:34 PM EDT	Special Marine Warning	MFL		41 min
Apr 6, 11:43 PM EDT	Special Marine Warning	MFL		62 min
Apr 6, 11:43 PM EDT	Special Weather Statement	MFL	Hendry	47 min
Apr 7, 12:16 AM EDT	Special Marine Warning	MFL		89 min
Apr 7, 12:18 AM EDT	Special Weather Statement	MFL	Broward, Palm Beach	57 min
Apr 7, 1:13 AM EDT	Special Weather Statement	MFL	Miami-Dade, Monroe	77 min
Apr 7, 1:38 AM EDT	Special Marine Warning	MFL		52 min
Apr 7, 2:32 AM EDT	Special Weather Statement	MFL	Miami-Dade	28 min
Apr 7, 3:20 AM EDT	Special Marine Warning	MFL		55 min
Apr 7, 3:29 AM EDT	Special Marine Warning	MFL		91 min
Apr 7, 3:32 AM EDT	Areal Flood Advisory	MFL	Miami-Dade	118 min
Apr 7, 4:12 AM EDT	Special Marine Warning	MFL		48 min
Apr 7, 4:59 AM EDT	Special Marine Warning	MFL		61 min
Apr 7, 6:02 AM EDT	Special Marine Warning	MFL		58 min
Apr 7, 5:22 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	113 min

Nearby

Severe Thunderstorm Warnings in Florida, 2008 Every severe thunderstorm warning in 2008

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.