Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 2, NWS Melbourne, FL

January 25, 20115 counties in Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jan 25, 2011, 5:30 PM EST for 5 counties in Florida. It was in force for 60 min. 12 reports 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, 5:30 PM EST (22:30 UTC)
Expired
Jan 25, 2011, 6:30 PM EST
In force
60 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

Counties Lake County, FL, Orange County, FL, Osceola County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 103 km from the middle of the area, began a volume at 22:33 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

TimeReportWhereRemark
Jan 25, 5:40 PM ESTTSTM WND DMGApopka, FLTREES DOWN LINDEN DRIVE. EAST OF SR436 AND NORTH OF SR408.
Jan 25, 5:45 PM ESTTSTM WND DMG1 Ssw Ferndale, FLSEVERAL LARGE TREES TOPPLED, ONE ONTO A MOBILE HOME. WINDS ESTIMATED AT 50 TO 60 MPH. TIME ESTIMATED BY RADAR.
Jan 25, 6:07 PM ESTTSTM WND DMGLake Mary, FLPOWER LINES DOWN AT WESLEY LAKE AND MEADOW BAY COURT
Jan 25, 6:09 PM ESTTSTM WND DMGSanford, FLPOWER LINES DOWN LAUREL ROAD AND PINE CREST ROAD
Jan 25, 6:11 PM ESTTSTM WND DMGAzalea Park, FLTREES DOWN LAKEVIEW DRIVE/N.BRION RD. ALSO US441/BOY SCOUT RD.
Jan 25, 6:13 PM ESTTSTM WND DMGWinter Springs, FLSANFORD PD REPORTED POWER LINES DOWN AT HAYES ROAD AND EAST BAHAMA ROAD. THIS IS A CORRECTION TO PREVIOUS REPORT WHICH INADVERTENTLY LISTED THE EVENT AS DENSE FOG.
Jan 25, 6:14 PM ESTTSTM WND GST 63Sanford, FLSANFORD/ORLANDO AIRPORT ASOS PEAK WIND 27055/2314
Jan 25, 6:15 PM ESTTSTM WND GST 39Kissimmee, FLKISM METAR 2315Z 29022G35KT
Jan 25, 6:16 PM ESTTSTM WND GST 44Orlando International A, FLKMCO ASOS REMARK PK WND 28038/2316
Jan 25, 6:20 PM ESTTSTM WND GST 605 N Kissimmee, FLHUNTERS CREEK ESTIMATED WIND 60 MPH, SMALL TREE LIMBS DOWN, HEAVY RAIN 1.75-1.99 INCHES IN 40 MINUTES.
Jan 25, 6:23 PM ESTTSTM WND DMGGeneva, FLSANFORD PD REPORTED POWER LINES DOWN AT OSCEOLA ROAD AND OSCEOLA BLUFF LANE
Jan 25, 6:31 PM ESTTSTM WND GST 60Port Orange, FL

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.

IssuedProductOfficeLasted
Jan 25, 2:07 PM ESTTornado WatchSPC7 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.5 hours before the alert went out and 99 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-pSkew-T log-p diagram, Cape Canaveral, FL at 12:00Z on 2011-01-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 12:00Z on 2011-01-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 158 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1132 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
158 m²/s²
0-3 km storm-relative helicity
288 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.

917 
WUUS52 KMLB 252230
SVRMLB
FLC069-095-097-117-127-252330-
/O.NEW.KMLB.SV.W.0002.110125T2230Z-110125T2330Z/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LAKE COUNTY IN FLORIDA
  ORANGE COUNTY IN FLORIDA
  NORTHWESTERN OSCEOLA COUNTY IN FLORIDA
  SEMINOLE COUNTY IN FLORIDA
  VOLUSIA COUNTY IN FLORIDA

* UNTIL 630 PM EST.

* AT 526 PM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
  A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM LAKE GEORGE TO GROVELAND TO
  25 MILES SOUTHWEST OF MASCOTTE...OR ALONG A LINE EXTENDING FROM
  8 MILES WEST OF PIERSON TO 6 MILES NORTHEAST OF LISBON TO
  GROVELAND TO 15 MILES NORTH OF WINSTON...AND MOVING EAST AT
  35 MPH.

*  THIS LINE OF STORMS WILL PUSH THROUGH MOST AREAS IN THE WARNED
   COUNTIES...WITH THE POTENTIAL FOR WIND DAMAGE ACROSS A WIDE AREA.
   EMBEDDED CIRCULATIONS WITHIN THIS LARGE SQUALL LINE COULD PRODUCE
   TORNADOES AT ANY TIME.

   RESIDENTS SHOULD BE PREPARED IF A TORNADO WARNING IS ISSUED!!!!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A SMALL INTERIOR ROOM.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EST TUESDAY EVENING
FOR EAST CENTRAL FLORIDA.

&&

LAT...LON 2845 8196 2896 8181 2897 8166 2933 8168
      2940 8142 2927 8140 2927 8116 2941 8116
      2943 8109 2915 8095 2861 8110 2807 8135
      2806 8143 2799 8138 2800 8141 2813 8146
      2825 8157 2826 8166 2834 8167 2834 8195
TIME...MOT...LOC 2227Z 260DEG 31KT 2928 8158 2894 8171
          2850 8182 2825 8207

$$



CRISTALDI

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 25, 4:03 AM ESTLake Wind AdvisoryMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia14 hr
Jan 25, 4:24 PM ESTSpecial Weather StatementMLBLake36 min
Jan 25, 4:32 PM ESTSevere Thunderstorm WarningMLBLake, Orange, Seminole, Volusia58 min
Jan 25, 5:28 PM ESTTornado WarningMLBLake, Orange, Volusia37 min
Jan 25, 5:55 PM ESTTornado WarningMLBLake, Orange, Seminole, Volusia36 min
Jan 25, 6:08 PM ESTTornado WarningMLBOkeechobee, Osceola52 min
Jan 25, 6:20 PM ESTSpecial Marine WarningMLB115 min
Jan 25, 6:21 PM ESTTornado WarningMLBBrevard, Orange, Seminole, Volusia54 min
Jan 25, 6:29 PM ESTTornado WarningMLBBrevard, Orange, Osceola61 min
Jan 25, 6:55 PM ESTSpecial Marine WarningMLB110 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011Every 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.