Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 36, NWS Melbourne, FL

May 19, 2012Indian River County, Okeechobee County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 19, 2012, 2:10 PM EDT for Indian River County, Okeechobee County, Saint Lucie County, Florida. It was in force for 50 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 19, 2012, 2:10 PM EDT (18:10 UTC)
Expired: May 19, 2012, 3:00 PM EDT
In force: 50 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Indian River County, FL, Okeechobee County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 60 km from the middle of the area, began a volume at 18:10 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, 6.2 hours before the alert went out and 101 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 563 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 981 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 97 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.

296 
WUUS52 KMLB 191810
SVRMLB
FLC061-093-111-191900-
/O.NEW.KMLB.SV.W.0036.120519T1810Z-120519T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
210 PM EDT SAT MAY 19 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL INDIAN RIVER COUNTY IN FLORIDA
  NORTHEASTERN OKEECHOBEE COUNTY IN FLORIDA
  NORTHWESTERN ST. LUCIE COUNTY IN FLORIDA

* UNTIL 300 PM EDT.

* AT 205 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 OVER
  THE FLORIDA TURNPIKE IN NORTHEAST OKEECHOBEE AND NORTHWESTERN ST.
  LUCIE COUNTIES ABOUT 8 MILES EAST OF FORT DRUM...MOVING NORTHEAST
  AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTIES.

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.

&&

LAT...LON 2766 8080 2764 8052 2744 8061 2749 8080
TIME...MOT...LOC 1809Z 196DEG 8KT 2756 8068

$$



CRISTALDI

3 follow-up statements

561 
WWUS52 KMLB 191831
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
231 PM EDT SAT MAY 19 2012

FLC061-093-111-191900-
/O.CON.KMLB.SV.W.0036.000000T0000Z-120519T1900Z/
ST. LUCIE-INDIAN RIVER-OKEECHOBEE-
231 PM EDT SAT MAY 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTHEASTERN OKEECHOBEE...SOUTH CENTRAL INDIAN RIVER AND
NORTHWESTERN ST. LUCIE COUNTIES...

AT 231 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED
TO DETECT A LARGE SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
NEAR THE FLORIDA TURNPIKE IN SOUTHWEST INDIAN RIVER COUNTY...NEAR
THE OKEECHOBEE AND SAINT LUCIE COUNTY BORDERS...OR ABOUT 7 MILES 
NORTHEAST OF FORT DRUM. THE STORM WAS MOVING NORTH AT 10 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTIES.

LAT...LON 2766 8080 2764 8052 2744 8061 2749 8080
TIME...MOT...LOC 1829Z 184DEG 7KT 2760 8070

$$



CRISTALDI

823 
WWUS52 KMLB 191840
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
240 PM EDT SAT MAY 19 2012

FLC093-111-191849-
/O.CAN.KMLB.SV.W.0036.000000T0000Z-120519T1900Z/
ST. LUCIE-OKEECHOBEE-
240 PM EDT SAT MAY 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OKEECHOBEE AND
NORTHWESTERN ST. LUCIE COUNTIES IS CANCELLED...

THE STORM HAS MOVED OUT OF THESE TWO COUNTIES.

LAT...LON 2756 8057 2756 8077 2756 8078 2758 8078
      2764 8078 2764 8079 2766 8079 2764 8052
TIME...MOT...LOC 1839Z 184DEG 7KT 2763 8069

$$

FLC061-191900-
/O.CON.KMLB.SV.W.0036.000000T0000Z-120519T1900Z/
INDIAN RIVER-
240 PM EDT SAT MAY 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTH CENTRAL INDIAN RIVER COUNTY...

AT 240 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL 
AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS OVER SOUTH 
CENTRAL INDIAN RIVER COUNTY...ABOUT 9 MILES NORTHEAST OF FORT 
DRUM...MOVING NORTH AT 10 MPH.

THE SEVERE THUNDERSTORM WILL CROSS STATE ROAD 60 BETWEEN 8 AND 10 
MILES WEST OF INTERSTATE 95...AND REMAIN OVER RURAL SOUTH CENTRAL
INDIAN RIVER COUNTY.


LAT...LON 2756 8057 2756 8077 2756 8078 2758 8078
      2764 8078 2764 8079 2766 8079 2764 8052
TIME...MOT...LOC 1839Z 184DEG 7KT 2763 8069

$$



CRISTALDI

965 
WWUS52 KMLB 191900
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
300 PM EDT SAT MAY 19 2012

FLC061-191909-
/O.EXP.KMLB.SV.W.0036.000000T0000Z-120519T1900Z/
INDIAN RIVER-
300 PM EDT SAT MAY 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL INDIAN RIVER 
COUNTY EXPIRED AT 300 PM EDT...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED...THUS THE 
WARNING HAS BEEN ALLOWED TO EXPIRE.

HEAVY RAINFALL...SMALL HAIL...AND FREQUENT LIGHTNING WILL STILL 
ACCOMPANY THE STORM AS IT MOVES NORTH AT 10 MPH NEAR COUNTY ROAD 512.

LAT...LON 2756 8057 2756 8077 2756 8078 2758 8078
      2764 8078 2764 8079 2766 8079 2764 8052
TIME...MOT...LOC 1859Z 184DEG 7KT 2767 8069

$$



CRISTALDI

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 2:03 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee	57 min
May 19, 2:52 PM EDT	Severe Thunderstorm Warning	MLB	Martin	38 min
May 19, 3:22 PM EDT	Special Weather Statement	MLB	Okeechobee	38 min
May 19, 3:26 PM EDT	Special Marine Warning	MLB		49 min
May 19, 3:31 PM EDT	Severe Thunderstorm Warning	MLB	Martin	44 min
May 19, 3:32 PM EDT	Tornado Warning	MLB	Martin, Okeechobee, Saint Lucie	43 min
May 19, 4:15 PM EDT	Special Marine Warning	MLB		104 min
May 19, 4:17 PM EDT	Special Weather Statement	MLB	Martin	43 min
May 19, 4:24 PM EDT	Special Weather Statement	MLB	Martin	36 min
May 19, 4:39 PM EDT	Special Weather Statement	MLB	Osceola	51 min
May 19, 5:29 PM EDT	Special Weather Statement	MLB	Osceola	46 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Every 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.