Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 3, NWS Melbourne, FL

January 25, 2011Indian River County, Okeechobee County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jan 25, 2011, 8:04 PM EST for Indian River County, Okeechobee County, Saint Lucie County, Florida. It was in force for 56 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: Jan 25, 2011, 8:04 PM EST (01:04 UTC)
Expired: Jan 25, 2011, 9:00 PM EST
In force: 56 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), 55 km from the middle of the area, began a volume at 01:06 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
Jan 25, 8:29 PM EST	TSTM WND GST 39	Vero Beach, FL	VERO BEACH AIRPORT ASOS KVRB SPECI 260129Z 29020G34KT, ALSO IN REMARKS PK WND 30034/0124

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
Jan 25, 2:07 PM EST	Tornado Watch	SPC	7 hr
Jan 25, 8:03 PM EST	Tornado Watch	SPC	4 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 1.1 hours before the alert went out and 97 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: 455 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 529 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

145 
WUUS52 KMLB 260104
SVRMLB
FLC061-093-111-260200-
/O.NEW.KMLB.SV.W.0003.110126T0104Z-110126T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
804 PM EST TUE JAN 25 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 900 PM EST.

* AT 757 PM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
A  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS 
IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED FROM NEAR BASINGER 
TO BLUE CYPRESS LAKE TO NEAR SEBASTIAN...AND MOVING NORTHEAST AT 40 
MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  OKEECHOBEE...FOUR SEASONS ESTATES...FORT DRUM...BLUE CYPRESS
  LAKE...SEBASTIAN...WINTER BEACH...WABASSO...VERO LAKE ESTATES...
  VERO BEACH SOUTH...VERO BEACH HIGHLANDS...VERO BEACH...ROSELAND...
  LAKEWOOD PARK...GIFFORD AND FELLSMERE

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 MIDNIGHT EST WEDNESDAY 
MORNING FOR PORTIONS OF EAST CENTRAL FLORIDA.

&&

LAT...LON 2725 8100 2736 8104 2742 8114 2764 8092
      2764 8087 2770 8087 2781 8076 2782 8051
      2785 8049 2782 8044 2786 8045 2780 8043
      2781 8046 2778 8041 2755 8035 2717 8089
TIME...MOT...LOC 0102Z 233DEG 32KT 2738 8101

$$


15

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 25, 7:04 PM EST	Special Weather Statement	MLB	Osceola	41 min
Jan 25, 7:22 PM EST	Tornado Warning	MLB	Brevard, Indian River, Osceola	53 min
Jan 25, 7:40 PM EST	Special Weather Statement	MLB	Indian River, Okeechobee, Saint Lucie	50 min
Jan 25, 8:12 PM EST	Tornado Warning	MLB	Indian River, Okeechobee, Saint Lucie	63 min
Jan 25, 8:17 PM EST	Special Marine Warning	MLB		118 min
Jan 25, 8:36 PM EST	Tornado Warning	MLB	Martin, Okeechobee, Saint Lucie	54 min
Jan 25, 9:31 PM EST	Special Weather Statement	MLB	Martin	44 min
Jan 26, 4:12 AM EST	Lake Wind Advisory	MLB	Lake, Orange, Osceola, Seminole, Volusia	14 hr

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.