Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 19, NWS Melbourne, FL

May 8, 2012Martin County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 8, 2012, 3:35 PM EDT for Martin County, Saint Lucie County, Florida. It was in force for 21 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 8, 2012, 3:35 PM EDT (19:35 UTC)
Expired
May 8, 2012, 3:56 PM EDT
In force
21 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

Counties Martin County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 94 km from the middle of the area, began a volume at 19:35 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 7.6 hours before the alert went out and 128 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, Cape Canaveral, FL at 12:00Z on 2012-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 544 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, Cape Canaveral, FL at 12:00Z on 2012-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 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
544 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
912 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
91 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.

188 
WUUS52 KMLB 081935
SVRMLB
FLC085-111-082030-
/O.NEW.KMLB.SV.W.0019.120508T1935Z-120508T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
335 PM EDT TUE MAY 8 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN MARTIN COUNTY IN FLORIDA
  SOUTHEASTERN ST. LUCIE COUNTY IN FLORIDA

* UNTIL 430 PM EDT.

* AT 330 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 NEAR
  PORT SAINT LUCIE RIVER PARK...OR NEAR PORT SAINT LUCIE...AND MOVING
  EAST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  INDIAN RIVER ESTATES...SAINT LUCIE NUCLEAR PLANT...NORTH RIVER
  SHORES...WALTON...NETTLES ISLAND AND JENSEN BEACH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR AND OR LARGE DESTRUCTIVE HAIL. FREQUENT TO EXCESSIVE LIGHTNING
AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE. IF THE STORM APPROACHES
YOU...SEEK SHELTER IN AN ENCLOSED BUILDING ON THE LOWEST FLOOR. KEEP
AWAY FROM WINDOWS.

NATIONAL WEATHER SERVICE METEOROLOGISTS ALSO DETECTED SOME WEAK
ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO
MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A SMALL INTERIOR
ROOM.

&&

LAT...LON 2725 8046 2742 8044 2744 8031 2735 8027
      2739 8027 2743 8030 2744 8030 2745 8027
      2729 8020 2728 8019 2727 8019 2724 8017
      2719 8016
TIME...MOT...LOC 1935Z 281DEG 9KT 2731 8035

$$


MOSES
1 follow-up statement
960 
WWUS52 KMLB 081956
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
356 PM EDT TUE MAY 8 2012

FLC085-111-082006-
/O.CAN.KMLB.SV.W.0019.000000T0000Z-120508T2030Z/
ST. LUCIE-MARTIN-
356 PM EDT TUE MAY 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MARTIN AND
SOUTHEASTERN ST. LUCIE COUNTIES IS CANCELLED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO 
LONGER CAPABLE OF PRODUCING LARGE HAIL OR DAMAGING WINDS. AS A 
RESULT...THE WARNING HAS BEEN CANCELLED. HOWEVER...TORRENTIAL 
RAINFALL...DANGEROUS LIGHTNING STRIKES AND WIND GUSTS WILL CONTINUE 
TO BE POSSIBLE.

LAT...LON 2725 8046 2742 8044 2744 8031 2735 8027
      2739 8027 2743 8030 2744 8030 2745 8027
      2729 8020 2728 8019 2727 8019 2724 8017
      2719 8016
TIME...MOT...LOC 1956Z 266DEG 12KT 2730 8028

$$


MOSES

The office that day

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

IssuedProductOfficeCountiesLasted
May 8, 2:30 PM EDTSpecial Weather StatementMLBMartin45 min
May 8, 2:45 PM EDTSpecial Marine WarningMLB2 hr
May 8, 3:09 PM EDTSpecial Weather StatementMLBSaint Lucie66 min
May 8, 4:47 PM EDTSpecial Weather StatementMLBMartin58 min
May 8, 4:53 PM EDTSevere Thunderstorm WarningMLBMartin38 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.