Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 23, NWS Miami, FL

May 15, 2012Glades County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 15, 2012, 3:09 PM EDT for Glades County, Florida. It was in force for 36 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
May 15, 2012, 3:09 PM EDT (19:09 UTC)
Expired
May 15, 2012, 3:45 PM EDT
In force
36 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Glades County, FL

The radar

The Tampa radar (KTBW), 131 km from the middle of the area, began a volume at 19:12 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

Tampa Bay, FL (KTBW), launched 12:00Z, 7.2 hours before the alert went out and 131 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, Tampa Bay, FL at 12:00Z on 2012-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 354 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2012-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
354 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
1264 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

557 
WUUS52 KMFL 151909
SVRMFL
FLC043-151945-
/O.NEW.KMFL.SV.W.0023.120515T1909Z-120515T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
309 PM EDT TUE MAY 15 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 345 PM EDT

* AT 304 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES
  NORTHEAST OF MUSE...AND MOVING EAST AT 5 MPH.

* THE STORM WILL AFFECT...
  RURAL WESTERN GLADES COUNTY
  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 2682 8154 2696 8156 2701 8131 2680 8132
TIME...MOT...LOC 1909Z 257DEG 6KT 2690 8146

$$

MJB
2 follow-up statements
509 
WWUS52 KMFL 151924
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
324 PM EDT TUE MAY 15 2012

FLC043-151945-
/O.CON.KMFL.SV.W.0023.000000T0000Z-120515T1945Z/
GLADES FL-
324 PM EDT TUE MAY 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR WEST CENTRAL GLADES COUNTY...

AT 319 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 
MILES NORTHEAST OF MUSE...MOVING EAST AT 5 MPH.

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 58
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 2683 8153 2696 8154 2701 8131 2680 8132
TIME...MOT...LOC 1924Z 257DEG 6KT 2691 8143

$$

MJB
033 
WWUS52 KMFL 151943
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
343 PM EDT TUE MAY 15 2012

FLC043-151952-
/O.EXP.KMFL.SV.W.0023.000000T0000Z-120515T1945Z/
GLADES FL-
343 PM EDT TUE MAY 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL GLADES COUNTY
WILL EXPIRE AT 345 PM EDT...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORM HAS
DISSIPATED. THUS THE THUNDERSTORM WARNING WILL EXPIRE AT 345 PM EDT.

HOWEVER, GUSTY WINDS OF 40 TO 50 MPH AND NICKEL SIZE HAIL MAY STILL
OCCUR WITH THIS STORM.

LAT...LON 2683 8153 2696 8154 2701 8131 2680 8132
TIME...MOT...LOC 1942Z 257DEG 6KT 2692 8140

$$

MJB

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 2:56 PM EDTSpecial Weather StatementMFLMartin34 min
May 15, 3:05 PM EDTSevere Thunderstorm WarningMFLPalm Beach40 min
May 15, 3:06 PM EDTSpecial Weather StatementMFLGlades24 min
May 15, 3:30 PM EDTSpecial Weather StatementMFLHendry30 min
May 15, 3:38 PM EDTSpecial Weather StatementMFLHendry52 min
May 15, 3:44 PM EDTSpecial Weather StatementMFLMartin46 min
May 15, 3:53 PM EDTSpecial Weather StatementMFLMonroe37 min
May 15, 4:19 PM EDTSpecial Weather StatementMFLHendry26 min
May 15, 4:24 PM EDTSpecial Weather StatementMFLPalm Beach36 min
May 15, 4:37 PM EDTSpecial Weather StatementMFLHendry23 min
May 15, 4:45 PM EDTSpecial Weather StatementMFLHendry30 min
May 15, 4:54 PM EDTSpecial Weather StatementMFLPalm Beach51 min
May 15, 4:58 PM EDTSpecial Weather StatementMFLBroward47 min
May 15, 5:03 PM EDTSpecial Weather StatementMFLBroward42 min
May 15, 5:06 PM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach24 min
May 15, 5:15 PM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach43 min
May 15, 5:33 PM EDTSevere Thunderstorm WarningMFLPalm Beach42 min
May 15, 5:53 PM EDTSevere Thunderstorm WarningMFLPalm Beach24 min
May 15, 6:00 PM EDTSpecial Marine WarningMFL45 min
May 15, 6:05 PM EDTAreal Flood AdvisoryMFLPalm Beach115 min
May 15, 6:38 PM EDTSpecial Marine WarningMFL52 min
May 15, 7:30 PM EDTSpecial Marine WarningMFL60 min
May 15, 7:30 PM EDTSpecial Marine WarningMFL60 min
May 15, 7:53 PM EDTSpecial Weather StatementMFLBroward52 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.