Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 137, NWS Miami, FL

August 25, 2012Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Aug 25, 2012, 8:01 AM EDT for Miami-Dade County, Florida. It was in force for 29 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
Aug 25, 2012, 8:01 AM EDT (12:01 UTC)
Expired
Aug 25, 2012, 8:30 AM EDT
In force
29 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 11 km from the middle of the area, began a volume at 12:03 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 nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 0.0 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-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2012-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1801 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 12:00Z on 2012-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
1801 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
648 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
152 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.

833 
WUUS52 KMFL 251201
SVRMFL
FLC086-251230-
/O.NEW.KMFL.SV.W.0137.120825T1201Z-120825T1230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
801 AM EDT SAT AUG 25 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL MIAMI-DADE COUNTY IN SOUTH FLORIDA.

* UNTIL 830 AM EDT

* AT 759 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR PERRINE...AND MOVING
  WEST AT 30 MPH.

* THE STORM WILL AFFECT...
  CUTLER BAY...
  WEST PERRINE...
  GOULDS...
  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.

&&

LAT...LON 2565 8026 2562 8028 2561 8028 2561 8030
      2559 8031 2557 8030 2554 8031 2552 8045
      2572 8039 2568 8025
TIME...MOT...LOC 1201Z 096DEG 25KT 2558 8031

$$

85-GIBBS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 8:38 PM EDTSpecial Marine WarningMFL67 min
Aug 24, 9:16 PM EDTSpecial Weather StatementMFLPalm Beach29 min
Aug 24, 9:19 PM EDTSpecial Marine WarningMFL56 min
Aug 24, 10:10 PM EDTSpecial Weather StatementMFLPalm Beach50 min
Aug 24, 10:29 PM EDTSpecial Weather StatementMFLBroward, Miami-Dade, Monroe61 min
Aug 24, 10:33 PM EDTSpecial Marine WarningMFL117 min
Aug 24, 10:41 PM EDTSpecial Weather StatementMFLPalm Beach64 min
Aug 24, 11:32 PM EDTHurricane WatchMFLCollier, Miami-Dade, Monroe36 hr
Aug 24, 11:32 PM EDTTropical Storm WarningMFLBroward, Collier, Glades, Hendry, Miami-Dade, Monroe and 1 more60 hr
Aug 25, 5:10 AM EDTHurricane WarningMFLCollier, Miami-Dade, Monroe36 hr
Aug 25, 5:29 AM EDTSpecial Weather StatementMFLBroward76 min
Aug 25, 5:45 AM EDTSpecial Marine WarningMFL27 min
Aug 25, 7:03 AM EDTSpecial Marine WarningMFL57 min
Aug 25, 7:27 AM EDTSpecial Marine WarningMFL63 min
Aug 25, 2:02 PM EDTSpecial Marine WarningMFL58 min
Aug 25, 2:41 PM EDTSpecial Marine WarningMFL28 min
Aug 25, 5:58 PM EDTSpecial Weather StatementMFLBroward32 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.