Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 2, NWS Miami, FL

January 25, 2011Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jan 25, 2011, 11:00 PM EST for Broward County, Miami-Dade County, Florida. It was in force for 45 min. 2 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
Jan 25, 2011, 11:00 PM EST (04:00 UTC)
Expired
Jan 25, 2011, 11:45 PM EST
In force
45 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

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

The radar

The Miami radar (KAMX), 37 km from the middle of the area, began a volume at 04:02 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

TimeReportWhereRemark
Jan 25, 11:10 PM ESTTSTM WND GST 55Opa-Locka, FLA THUNDERSTORM PRODUCED A WIND GUST OF 55 MPH AT MIAMI DADE FIRE RESCUE IN OPA LOCKA AS WELL AS OPA LOCKA AIRPORT.
Jan 25, 11:20 PM ESTTSTM WND GST 52Miami Beach, FLA THUNDERSTORM PRODUCED A WIND GUST OF 52 MPH IN MIAMI BEACH.

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.

IssuedProductOfficeLasted
Jan 25, 8:03 PM ESTTornado WatchSPC4 hr

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 4.0 hours before the alert went out and 11 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-pSkew-T log-p diagram, Miami, FL at 00:00Z on 2011-01-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1046 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 00:00Z on 2011-01-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 201 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1046 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
201 m²/s²
0-3 km storm-relative helicity
276 m²/s²
Significant tornado parameter
1.3
Supercell composite
8.2

Open this sounding in Storm Lab

The text

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

764 
WUUS52 KMFL 260400
SVRMFL
FLC011-086-260445-
/O.NEW.KMFL.SV.W.0002.110126T0400Z-110126T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1100 PM EST TUE JAN 25 2011

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 1145 PM EST

* AT 1057 PM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM SOUTHWEST RANCHES TO 5 MILES SOUTHWEST
  OF PENNSUCO...AND MOVING EAST AT 30 MPH.

* THE LINE OF STORMS WILL AFFECT...
  MIRAMAR...
  DORAL...
  CAROL CITY...
  HOLLYWOOD...
  AVENTURA...
  EL PORTAL...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 70
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 2580 8012 2580 8014 2584 8014 2586 8015
      2587 8013 2590 8014 2586 8017 2580 8018
      2584 8058 2608 8037 2605 8011
TIME...MOT...LOC 0400Z 273DEG 27KT 2602 8029 2586 8042

$$

KOB
2 follow-up statements
730 
WWUS52 KMFL 260434
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1134 PM EST TUE JAN 25 2011

FLC011-086-260445-
/O.CON.KMFL.SV.W.0002.000000T0000Z-110126T0445Z/
BROWARD FL-MIAMI-DADE FL-
1134 PM EST TUE JAN 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EST
FOR NORTHEASTERN MIAMI-DADE AND SOUTHEASTERN BROWARD COUNTIES...

AT 1130 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM HOLLYWOOD DOWNTOWN TO LITTLE HAITI...MOVING EAST AT 25
MPH.

THESE STORMS WILL AFFECT NORTH MIAMI-BEACH AND AVENTURA.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EST WEDNESDAY
MORNING FOR SOUTHERN FLORIDA.

LAT...LON 2582 8018 2580 8018 2584 8028 2605 8022
      2605 8011 2580 8012 2580 8014 2584 8014
      2586 8015 2587 8013 2590 8014 2586 8017
      2584 8017
TIME...MOT...LOC 0434Z 273DEG 21KT 2603 8007 2585 8019

$$

BAXTER
765 
WWUS52 KMFL 260446
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1146 PM EST TUE JAN 25 2011

FLC011-086-260456-
/O.EXP.KMFL.SV.W.0002.000000T0000Z-110126T0445Z/
BROWARD FL-MIAMI-DADE FL-
1146 PM EST TUE JAN 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIAMI-DADE AND
SOUTHEASTERN BROWARD COUNTIES HAS EXPIRED...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORMS HAVE
MOVED OUT OF THE WARNED AREA AND INTO THE ATLANTIC WATERS.
THUS THE THUNDERSTORM WARNING HAS EXPIRED.

LAT...LON 2582 8018 2580 8018 2584 8028 2605 8022
      2605 8011 2580 8012 2580 8014 2584 8014
      2586 8015 2587 8013 2590 8014 2586 8017
      2584 8017
TIME...MOT...LOC 0434Z 273DEG 21KT 2603 8007 2585 8019

$$

BAXTER

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 25, 8:32 PM ESTSpecial Marine WarningMFL58 min
Jan 25, 8:55 PM ESTSpecial Weather StatementMFLHendry35 min
Jan 25, 9:12 PM ESTSpecial Weather StatementMFLPalm Beach48 min
Jan 25, 9:39 PM ESTSpecial Weather StatementMFLBroward36 min
Jan 25, 9:58 PM ESTSpecial Weather StatementMFLPalm Beach47 min
Jan 25, 10:23 PM ESTSevere Thunderstorm WarningMFLBroward, Palm Beach37 min
Jan 25, 10:28 PM ESTSpecial Marine WarningMFL92 min
Jan 25, 10:34 PM ESTSpecial Weather StatementMFLBroward26 min
Jan 25, 11:12 PM ESTSpecial Marine WarningMFL93 min
Jan 25, 11:22 PM ESTSpecial Weather StatementMFLMiami-Dade23 min
Jan 25, 11:59 PM ESTSpecial Marine WarningMFL46 min
Jan 26, 12:49 AM ESTSpecial Marine WarningMFL41 min
Jan 26, 1:25 AM ESTSpecial Marine WarningMFL50 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011Every severe thunderstorm warning in 2011

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.