Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 27, NWS Melbourne, FL

May 17, 2012Lake County, Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 17, 2012, 6:14 PM EDT for Lake County, Volusia County, Florida. It was in force for 61 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, 6:14 PM EDT (22:14 UTC)
Expired: May 17, 2012, 7:15 PM EDT
In force: 61 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Lake County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 128 km from the middle of the area, began a volume at 22:15 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, 7:08 PM EDT	HAIL 0.75	3 Se Deland, FL

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, 10.2 hours before the alert went out and 107 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.

861 
WUUS52 KMLB 172214
SVRMLB
FLC069-127-172315-
/O.NEW.KMLB.SV.W.0027.120517T2214Z-120517T2315Z/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN LAKE COUNTY IN FLORIDA
  WESTERN VOLUSIA COUNTY IN FLORIDA

* UNTIL 715 PM EDT.

* AT 610 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
  DELEON SPRINGS...AND MOVING EAST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... 
  DE LEON SPRINGS...DELAND AND LAKE HELEN.

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 2920 8114 2894 8118 2901 8160 2921 8151
TIME...MOT...LOC 2214Z 278DEG 9KT 2911 8141

$$


KELLY

1 follow-up statement

133 
WWUS52 KMLB 172243
SVSMLB

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

FLC069-127-172315-
/O.CON.KMLB.SV.W.0027.000000T0000Z-120517T2315Z/
LAKE-VOLUSIA-
643 PM EDT THU MAY 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT 
FOR WESTERN VOLUSIA AND NORTHEAST LAKE COUNTIES...

AT 638 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 
LOCATED NEAR DELAND...MOVING SOUTHEAST AT 10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HONTOON
ISLAND STATE PARK...FATIO...DELAND...LAKE HELEN...DAYTONA HIGHRIDGE 
ESTATES AND CASSADAGA.

OTHER STRONG STORMS WERE DEVELOPING OVER NORTHWEST VOLUSIA COUNTY 
AND MOVING OUT OF MARION COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF ON OR NEAR LAKE GEORGE...GET OUT OF THE WATER AND MOVE INDOORS OR 
INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 15 MILES 
FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU ARE 
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW. 
DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM!

&&

LAT...LON 2920 8114 2894 8118 2901 8160 2921 8151
TIME...MOT...LOC 2241Z 296DEG 10KT 2906 8133

$$


KELLY

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, 6:27 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
May 17, 7:39 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	51 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.