Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 13, NWS Melbourne, FL

March 31, 2011Brevard County, Indian River County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 31, 2011, 8:30 AM EDT for Brevard County, Indian River County, Osceola County, Florida. It was in force for 27 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: Mar 31, 2011, 8:30 AM EDT (12:30 UTC)
Expired: Mar 31, 2011, 8:57 AM EDT
In force: 27 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Brevard County, FL, Indian River County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 4 km from the middle of the area, began a volume at 12:31 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
Mar 31, 8:44 AM EDT	TSTM WND GST 0	Cape Canaveral, FL	ASOS KXMR OBSERVATION REMARKS PK WND 31036/1244

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 31, 6:00 AM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 0.5 hours before the alert went out and 39 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: 81 J/kg
Mixed-layer CIN: -219 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 228 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.

155 
WUUS52 KMLB 311230
SVRMLB
FLC009-061-097-311345-
/O.NEW.KMLB.SV.W.0013.110331T1230Z-110331T1345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
830 AM EDT THU MAR 31 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BREVARD COUNTY IN FLORIDA
  NORTHWESTERN INDIAN RIVER COUNTY IN FLORIDA
  EASTERN OSCEOLA COUNTY IN FLORIDA

* UNTIL 945 AM EDT.

* AT 827 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE          
   EXTENDING FROM SHARPES TO SAINT CLOUD...  AND MOVING SOUTHEAST AT 
  30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  ROCKLEDGE...CAPE CANAVERAL...COCOA BEACH...VIERA...SUNTREE...      
  PATRICK AIRFORCE BASE...SATELLITE BEACH...CAMP HOLLY FISH          
  CAMP...KENANSVILLE...INDIAN HARBOUR BEACH...WEST MELBOURNE...      
  MELBOURNE...INDIALANTIC...MELBOURNE BEACH...PALM BAY...MALABAR...  
  YEEHAW JUNCTION...SEBASTIAN                                        
  INLET...MICCO...GRANT...FELLSMERE...BLUE CYPRESS LAKE AND          
  BAREFOOT BAY

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EDT THURSDAY AFTERNOON
FOR EAST CENTRAL FLORIDA.

&&

LAT...LON 2781 8044 2786 8046 2794 8052 2780 8046
      2764 8108 2833 8111 2834 8088 2836 8087
      2838 8073 2834 8072 2838 8072 2839 8066
      2827 8066 2823 8063 2828 8061 2839 8063
      2840 8059 2820 8059 2811 8057 2781 8042
TIME...MOT...LOC 1229Z 306DEG 27KT 2844 8077 2821 8121

$$


MOSES

1 follow-up statement

888 
WWUS52 KMLB 311257
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
857 AM EDT THU MAR 31 2011

FLC009-061-097-311307-
/O.CAN.KMLB.SV.W.0013.000000T0000Z-110331T1345Z/
OSCEOLA-INDIAN RIVER-BREVARD-
857 AM EDT THU MAR 31 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BREVARD...
NORTHWESTERN INDIAN RIVER AND EASTERN OSCEOLA 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...GUSTY WINDS UP TO 
40 MPH...HEAVY RAIN AND DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO 
BE POSSIBLE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EDT THURSDAY AFTERNOON
FOR EAST CENTRAL FLORIDA.

LAT...LON 2781 8044 2786 8046 2794 8052 2780 8046
      2764 8108 2833 8111 2834 8088 2836 8087
      2838 8073 2834 8072 2838 8072 2839 8066
      2827 8066 2823 8063 2828 8061 2839 8063
      2840 8059 2820 8059 2811 8057 2781 8042
TIME...MOT...LOC 1257Z 306DEG 27KT 2832 8058 2809 8102

$$


MOSES

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 12:38 AM EDT	Special Marine Warning	MLB		82 min
Mar 31, 3:42 AM EDT	Small Craft Advisory for Winds	MLB		24 hr
Mar 31, 6:16 AM EDT	Special Weather Statement	MLB	Lake	59 min
Mar 31, 6:58 AM EDT	Special Weather Statement	MLB	Brevard, Lake, Orange, Osceola, Seminole, Volusia	62 min
Mar 31, 7:04 AM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Seminole, Volusia	56 min
Mar 31, 7:27 AM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Osceola	63 min
Mar 31, 7:33 AM EDT	Special Marine Warning	MLB		117 min
Mar 31, 7:43 AM EDT	Tornado Warning	MLB	Brevard, Seminole, Volusia	42 min
Mar 31, 8:13 AM EDT	Severe Thunderstorm Warning	MLB	Brevard, Orange, Volusia	47 min
Mar 31, 9:01 AM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Osceola	59 min
Mar 31, 10:16 AM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Seminole	59 min
Mar 31, 10:37 AM EDT	Tornado Warning	MLB	Lake, Orange, Seminole, Volusia	53 min
Mar 31, 10:38 AM EDT	Special Marine Warning	MLB		2 hr
Mar 31, 11:31 AM EDT	Special Weather Statement	MLB	Lake, Orange, Seminole, Volusia	44 min
Mar 31, 11:51 AM EDT	Tornado Warning	MLB	Brevard, Seminole, Volusia	24 min
Mar 31, 12:15 PM EDT	Tornado Warning	MLB	Brevard	19 min
Mar 31, 12:31 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Osceola	59 min
Mar 31, 12:32 PM EDT	Tornado Warning	MLB	Osceola	43 min
Mar 31, 12:47 PM EDT	Special Marine Warning	MLB		88 min
Mar 31, 1:05 PM EDT	Tornado Warning	MLB	Brevard, Osceola	23 min
Mar 31, 1:59 PM EDT	Special Marine Warning	MLB		2 hr
Mar 31, 2:15 PM EDT	Special Weather Statement	MLB	Lake, Volusia	45 min
Mar 31, 2:21 PM EDT	Special Marine Warning	MLB		54 min
Mar 31, 3:58 PM EDT	Special Weather Statement	MLB	Orange	62 min
Mar 31, 5:52 PM EDT	Special Weather Statement	MLB	Indian River	53 min
Mar 31, 5:53 PM EDT	Special Marine Warning	MLB		112 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

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.