Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 70, NWS Miami, FL

June 8, 2012Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 8, 2012, 1:14 PM EDT for Palm Beach County, Florida. It was in force for 31 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
Jun 8, 2012, 1:14 PM EDT (17:14 UTC)
Expired
Jun 8, 2012, 1:45 PM EDT
In force
31 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 130 km from the middle of the area, began a volume at 17:14 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, 5.2 hours before the alert went out and 111 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 2012-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1799 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 2012-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
1799 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
908 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.8

Open this sounding in Storm Lab

The text

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

571 
WUUS52 KMFL 081714
SVRMFL
FLC099-081745-
/O.NEW.KMFL.SV.W.0070.120608T1714Z-120608T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
114 PM EDT FRI JUN 8 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 145 PM EDT

* AT 113 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES NORTHWEST OF BELLE
  GLADE...AND MOVING EAST AT 20 MPH.

* THE STORM WILL AFFECT...
  SOUTH BAY...
  BELLE GLADE...
  PAHOKEE...
  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 2685 8058 2661 8060 2664 8083 2672 8083
      2671 8081 2671 8078 2669 8074 2672 8073
      2677 8075 2678 8073 2675 8071 2676 8069
      2681 8070 2683 8068
TIME...MOT...LOC 1715Z 268DEG 15KT 2673 8072

$$

GARCIA
1 follow-up statement
667 
WWUS52 KMFL 081736
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
136 PM EDT FRI JUN 8 2012

FLC099-081746-
/O.EXP.KMFL.SV.W.0070.000000T0000Z-120608T1745Z/
PALM BEACH FL-
136 PM EDT FRI JUN 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL PALM BEACH COUNTY
WILL EXPIRE AT 145 PM EDT...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORM HAS
WEAKENED. THUS THE THUNDERSTORM WARNING WILL EXPIRE AT 145 PM EDT.

LAT...LON 2685 8058 2661 8060 2664 8083 2672 8083
      2671 8081 2671 8078 2669 8074 2672 8073
      2677 8075 2678 8073 2675 8071 2676 8069
      2681 8070 2683 8068
TIME...MOT...LOC 1736Z 268DEG 15KT 2673 8062

$$

GARCIA

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 11:33 AM EDTSpecial Weather StatementMFLGlades, Hendry42 min
Jun 8, 12:20 PM EDTSpecial Weather StatementMFLGlades, Hendry55 min
Jun 8, 12:27 PM EDTSpecial Marine WarningMFL63 min
Jun 8, 12:51 PM EDTSpecial Weather StatementMFLPalm Beach24 min
Jun 8, 12:54 PM EDTSpecial Marine WarningMFL66 min
Jun 8, 1:17 PM EDTSpecial Weather StatementMFLPalm Beach43 min
Jun 8, 1:31 PM EDTSpecial Weather StatementMFLPalm Beach29 min
Jun 8, 2:02 PM EDTSpecial Marine WarningMFL58 min
Jun 8, 2:05 PM EDTSpecial Weather StatementMFLPalm Beach25 min
Jun 8, 2:32 PM EDTSpecial Weather StatementMFLBroward28 min
Jun 8, 2:50 PM EDTAreal Flood AdvisoryMFLPalm Beach115 min
Jun 8, 2:55 PM EDTSpecial Marine WarningMFL65 min
Jun 8, 3:17 PM EDTSpecial Weather StatementMFLBroward28 min
Jun 8, 3:25 PM EDTSevere Thunderstorm WarningMFLMiami-Dade18 min
Jun 8, 3:49 PM EDTSpecial Weather StatementMFLBroward26 min
Jun 8, 4:02 PM EDTSpecial Marine WarningMFL58 min
Jun 8, 4:23 PM EDTSpecial Weather StatementMFLMiami-Dade37 min
Jun 8, 4:40 PM EDTSpecial Marine WarningMFL65 min
Jun 8, 4:58 PM EDTSpecial Marine WarningMFL62 min
Jun 8, 5:27 PM EDTAreal Flood AdvisoryMFLMiami-Dade108 min
Jun 8, 6:35 PM EDTSpecial Weather StatementMFLBroward25 min
Jun 8, 7:11 PM EDTSpecial Weather StatementMFLBroward34 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.