Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 31, NWS Melbourne, FL

May 17, 2012Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 17, 2012, 7:39 PM EDT for Brevard County, Florida. It was in force for 51 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 17, 2012, 7:39 PM EDT (23:39 UTC)
Expired: May 17, 2012, 8:30 PM EDT
In force: 51 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 34 km from the middle of the area, began a volume at 23:39 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.

What was reported inside it

Time	Report	Where	Remark
May 17, 7:43 PM EDT	HAIL 1.25	Merritt Island, FL	QUARTER TO HALF-DOLLAR SIZED HAIL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 11.7 hours before the alert went out and 12 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: 74 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 866 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 65 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.

618 
WUUS52 KMLB 172339
SVRMLB
FLC009-180030-
/O.NEW.KMLB.SV.W.0031.120517T2339Z-120518T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
739 PM EDT THU MAY 17 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BREVARD COUNTY IN FLORIDA

* UNTIL 830 PM EDT.

* AT 734 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
  MERRITT ISLAND...AND MOVING SOUTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  CAPE CANAVERAL...PORT CANAVERAL AND COCOA 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.

&&

LAT...LON 2843 8057 2840 8059 2827 8060 2831 8065
      2830 8067 2832 8073 2852 8074 2850 8063
      2841 8065 2843 8061 2850 8061 2849 8053
      2848 8053 2847 8052 2845 8052
TIME...MOT...LOC 2339Z 304DEG 19KT 2840 8067

$$


WEITLICH

2 follow-up statements

918 
WWUS52 KMLB 172348
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
748 PM EDT THU MAY 17 2012

FLC009-180030-
/O.CON.KMLB.SV.W.0031.000000T0000Z-120518T0030Z/
BREVARD-
748 PM EDT THU MAY 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR CENTRAL BREVARD COUNTY...

AT 744 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.  QUARTER SIZE HAIL 
WAS REPORTED BY THE PUBLIC NEAR COCOA. THIS STORM WAS LOCATED NEAR 
CAPE CANAVERAL...MOVING SOUTHEAST AT 20 MPH.  

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JETTY
PARK...PORT CANAVERAL AND COCOA BEACH

LAT...LON 2843 8057 2840 8059 2827 8060 2831 8065
      2830 8067 2832 8073 2852 8074 2850 8063
      2841 8065 2843 8061 2850 8061 2849 8053
      2848 8053 2847 8052 2845 8052
TIME...MOT...LOC 2347Z 304DEG 20KT 2837 8063

$$


WEITLICH

562 
WWUS52 KMLB 180030
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
830 PM EDT THU MAY 17 2012

FLC009-180039-
/O.EXP.KMLB.SV.W.0031.000000T0000Z-120518T0030Z/
BREVARD-
830 PM EDT THU MAY 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BREVARD COUNTY WILL
EXPIRE AT 830 PM EDT...

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

LAT...LON 2843 8057 2840 8059 2827 8060 2831 8065
      2830 8067 2832 8073 2852 8074 2850 8063
      2841 8065 2843 8061 2850 8061 2849 8053
      2848 8053 2847 8052 2845 8052
TIME...MOT...LOC 0029Z 304DEG 20KT 2824 8041

$$


WEITLICH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 1:45 AM EDT	Tornado Warning	MLB	Martin, Saint Lucie	27 min
May 17, 2:34 AM EDT	Tornado Warning	MLB	Martin	41 min
May 17, 2:47 AM EDT	Special Marine Warning	MLB		58 min
May 17, 4:27 PM EDT	Special Marine Warning	MLB		63 min
May 17, 4:27 PM EDT	Special Weather Statement	MLB	Indian River	48 min
May 17, 5:37 PM EDT	Special Weather Statement	MLB	Indian River	38 min
May 17, 5:53 PM EDT	Special Weather Statement	MLB	Seminole	52 min
May 17, 5:55 PM EDT	Special Weather Statement	MLB	Martin	50 min
May 17, 5:59 PM EDT	Special Weather Statement	MLB	Volusia	46 min
May 17, 6:14 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Volusia	61 min
May 17, 6:27 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	63 min
May 17, 6:30 PM EDT	Special Marine Warning	MLB		2 hr
May 17, 6:47 PM EDT	Special Weather Statement	MLB	Volusia	43 min
May 17, 6:53 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Volusia	37 min
May 17, 7:14 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	61 min
May 17, 7:32 PM EDT	Special Weather Statement	MLB	Brevard	43 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.