Alert archive / Florida / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 4, NWS Melbourne, FL

January 22, 20174 counties in Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jan 22, 2017, 7:00 PM EST for 4 counties in Florida. It was in force for 60 min. 6 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 22, 2017, 7:00 PM EST (00:00 UTC)
Expired
Jan 22, 2017, 8:00 PM EST
In force
60 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

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

The radar

The Melbourne radar (KMLB), 98 km from the middle of the area, began a volume at 00:00 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 22, 7:11 PM ESTTSTM WND GST 61Sanford Airport, FLASOS MEASURED A GUST OF 53 KT/61 MPH FROM THE SSW.
Jan 22, 7:12 PM ESTTSTM WND DMG3 Nw Lake Jessup, FLPICTURE ON TWITTER OF A TREE DOWN IN THE MAGNOLIA PARK AREA OF SANFORD. TIME AND LOCATION ESTIMATED.
Jan 22, 7:15 PM ESTTSTM WND DMGMaitland, FLTWITTER PICTURE OF TREE DOWN IN MAITLAND. LOCATION APPROXIMATE.
Jan 22, 7:24 PM ESTTSTM WND GST 54Orlando Executive Airpo, FLMEASURED WIND GUST OF 54 MPH/47 KT FROM THE SSW.
Jan 22, 7:51 PM ESTTSTM WND GST 51Orlando International A, FLMEASURED WIND GUST OF 50 MPH/44 KT FROM THE SSW
Jan 22, 7:51 PM ESTTSTM WND GST 51Orlando International A, FLMEASURED WIND GUST OF 51 MPH/44 KT FROM THE SSW

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 22, 4:35 PM ESTTornado Watch PDSSPC5 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 0.0 hours before the alert went out and 102 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 00:00Z on 2017-01-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 838 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2017-01-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 235 square meters per square second.1939587897Sfc1 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
838 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1078 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
235 m²/s²
0-3 km storm-relative helicity
265 m²/s²
Significant tornado parameter
1.2
Supercell composite
6.3

Open this sounding in Storm Lab

The text

As transmitted.

983 
WUUS52 KMLB 230000
SVRMLB
FLC069-095-097-117-230100-
/O.NEW.KMLB.SV.W.0004.170123T0000Z-170123T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
700 PM EST SUN JAN 22 2017

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  Orange County in east central Florida...
  Southwestern Lake County in east central Florida...
  Seminole County in east central Florida...
  Northwestern Osceola County in east central Florida...

* Until 800 PM EST

* At 658 PM EST, severe thunderstorms were located over Bay Hill,
  near Bay Lake, and near Maitland, moving east at 55 mph.

  HAZARD...70 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings. 

* Locations impacted include...
  Orlando, Kissimmee, Sanford, Apopka and Altamonte Springs. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

&&

A tornado watch remains in effect until 1000 PM EST for east central
Florida.

LAT...LON 2852 8195 2880 8120 2880 8118 2878 8118
      2879 8114 2883 8112 2835 8091 2826 8165
      2835 8166 2835 8179 2836 8179 2836 8186
      2835 8186 2835 8196
TIME...MOT...LOC 2358Z 249DEG 47KT 2843 8154 

HAIL...1.00IN
WIND...70MPH
 
$$

dws

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 22, 7:12 PM ESTSpecial Marine WarningMLB63 min
Jan 22, 7:19 PM ESTTornado WarningMLBOrange, Seminole, Volusia41 min
Jan 22, 7:26 PM ESTSevere Thunderstorm WarningMLBLake, Orange, Volusia64 min
Jan 22, 7:29 PM ESTTornado WarningMLBVolusia31 min
Jan 22, 7:51 PM ESTTornado WarningMLBBrevard, Orange, Seminole, Volusia39 min
Jan 22, 7:53 PM ESTSevere Thunderstorm WarningMLBLake, Orange, Seminole, Volusia37 min
Jan 22, 8:15 PM ESTSpecial Marine WarningMLB2 hr
Jan 22, 8:29 PM ESTSevere Thunderstorm WarningMLBBrevard, Orange, Seminole, Volusia61 min
Jan 22, 8:36 PM ESTSpecial Weather StatementMLBOrange54 min
Jan 22, 8:59 PM ESTSpecial Weather StatementMLBBrevard, Osceola46 min
Jan 22, 9:10 PM ESTSevere Thunderstorm WarningMLBBrevard, Osceola50 min
Jan 22, 9:28 PM ESTTornado WarningMLBBrevard32 min
Jan 22, 9:58 PM ESTSevere Thunderstorm WarningMLBBrevard, Osceola47 min
Jan 22, 9:59 PM ESTSpecial Weather StatementMLBBrevard, Indian River, Osceola91 min
Jan 22, 10:07 PM ESTTornado WarningMLBBrevard23 min
Jan 22, 10:14 PM ESTSpecial Marine WarningMLB3 hr
Jan 23, 12:21 AM ESTSpecial Weather StatementMLBIndian River, Saint Lucie24 min
Jan 23, 12:40 AM ESTSpecial Weather StatementMLBMartin35 min
Jan 23, 1:14 AM ESTSpecial Marine WarningMLB2 hr
Jan 23, 3:15 AM ESTWind AdvisoryMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia15 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2017Every severe thunderstorm warning in 2017

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.