Alert archive / Florida / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 29, NWS Melbourne, FL

May 24, 20175 counties in Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 24, 2017, 3:48 PM EDT for 5 counties in Florida. It was in force for 42 min. 3 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: May 24, 2017, 3:48 PM EDT (19:48 UTC)
Expired: May 24, 2017, 4:30 PM EDT
In force: 42 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Melbourne radar (KMLB), 72 km from the middle of the area, began a volume at 19:49 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 24, 3:51 PM EDT	TSTM WND GST 47	Kissimmee, FL
May 24, 4:06 PM EDT	TSTM WND GST 46	4 Nnw Lake Jessup, FL	ASOS AT SANFORD AIRPORT MEASURED PEAK WIND GUST OF 40 KT FROM SOUTHWEST.
May 24, 4:06 PM EDT	TSTM WND GST 46	Sanford Airport, 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.

Issued	Product	Office	Lasted
May 24, 2:49 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 7.8 hours before the alert went out and 60 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: 608 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1065 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

As transmitted.

486 
WUUS52 KMLB 241948
SVRMLB
FLC069-095-097-117-127-242030-
/O.NEW.KMLB.SV.W.0029.170524T1948Z-170524T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
348 PM EDT WED MAY 24 2017

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  Seminole County in east central Florida...
  East central Lake County in east central Florida...
  Orange County in east central Florida...
  South central Volusia County in east central Florida...
  North central Osceola County in east central Florida...

* Until 430 PM EDT

* At 347 PM EDT, severe thunderstorms were located along a line
  extending from near Lake Apopka to near Oak Ridge to near West Lake
  Toho, moving northeast at 45 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Orlando, Deltona, Kissimmee, Sanford and Apopka. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to 
flash flooding. Do not drive your vehicle through flooded roadways.

To report severe weather, contact your nearest law enforcement 
agency. They will send your report to the National Weather Service 
office in Melbourne.

&&

LAT...LON 2903 8119 2880 8095 2879 8095 2879 8097
      2861 8097 2860 8095 2859 8094 2858 8095
      2856 8093 2853 8094 2852 8091 2850 8090
      2819 8142 2843 8151 2870 8173
TIME...MOT...LOC 1947Z 232DEG 41KT 2868 8165 2850 8143 2825 8139 

HAIL...<.75IN
WIND...60MPH
 
$$

Cristaldi

2 follow-up statements

680 
WWUS52 KMLB 242012
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
412 PM EDT WED MAY 24 2017

FLC069-242020-
/O.CAN.KMLB.SV.W.0029.000000T0000Z-170524T2030Z/
Lake FL-
412 PM EDT WED MAY 24 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LAKE COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area and weakened. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 1100 PM EDT for
east central Florida.

LAT...LON 2879 8153 2878 8142 2883 8142 2887 8137
      2891 8136 2903 8119 2880 8095 2879 8097
      2861 8097 2859 8094 2853 8094 2850 8090
      2819 8142 2840 8150 2856 8143 2875 8158
TIME...MOT...LOC 2010Z 232DEG 41KT 2884 8143 2865 8121 2840 8117 

$$

FLC095-097-117-127-242030-
/O.CON.KMLB.SV.W.0029.000000T0000Z-170524T2030Z/
Seminole FL-Orange FL-Volusia FL-Osceola FL-
412 PM EDT WED MAY 24 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SEMINOLE...ORANGE...SOUTH CENTRAL VOLUSIA AND NORTH CENTRAL
OSCEOLA COUNTIES...

At 410 PM EDT, severe thunderstorms were located along a line
extending from near Cassia to Oviedo to near Lake Hart, moving 
northeast at 45 mph. Other strong to severe storms were moving into 
Saint Cloud and southern Orange County near Orlando International 
Airport.


HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Orlando, Deltona, Saint Cloud and Sanford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Melbourne.

If on or near any lakes in the warning area, get away from 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!  Do not be caught on the water in a thunderstorm.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2879 8153 2878 8142 2883 8142 2887 8137
      2891 8136 2903 8119 2880 8095 2879 8097
      2861 8097 2859 8094 2853 8094 2850 8090
      2819 8142 2840 8150 2856 8143 2875 8158
TIME...MOT...LOC 2010Z 232DEG 41KT 2884 8143 2865 8121 2840 8117 

HAIL...<.75IN
WIND...60MPH
 
$$

Cristaldi

375 
WWUS52 KMLB 242038
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
438 PM EDT WED MAY 24 2017

FLC095-097-117-127-242048-
/O.EXP.KMLB.SV.W.0029.000000T0000Z-170524T2030Z/
Seminole FL-Orange FL-Volusia FL-Osceola FL-
438 PM EDT WED MAY 24 2017

...THE SEVERE THUNDERSTORM WARNING FOR SEMINOLE...ORANGE...SOUTH
CENTRAL VOLUSIA AND NORTH CENTRAL OSCEOLA COUNTIES HAS EXPIRED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been allowed to expire.

A severe thunderstorm watch remains in effect until 1100 PM EDT for
east central Florida.

LAT...LON 2879 8153 2878 8142 2883 8142 2887 8137
      2891 8136 2903 8119 2880 8095 2879 8097
      2861 8097 2859 8094 2853 8094 2850 8090
      2819 8142 2840 8150 2856 8143 2875 8158
TIME...MOT...LOC 2038Z 232DEG 41KT 2902 8116 2883 8094 2858 8090 

$$

Cristaldi

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 4:18 AM EDT	Lake Wind Advisory	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	16 hr
May 24, 4:26 AM EDT	Small Craft Advisory	MLB		34 hr
May 24, 4:26 AM EDT	Small Craft Advisory for Winds	MLB		34 hr
May 24, 12:42 PM EDT	Special Weather Statement	MLB	Volusia	48 min
May 24, 1:36 PM EDT	Special Weather Statement	MLB	Lake, Seminole, Volusia	84 min
May 24, 1:40 PM EDT	Special Marine Warning	MLB		3 hr
May 24, 1:55 PM EDT	Special Weather Statement	MLB	Brevard, Orange, Osceola	65 min
May 24, 2:58 PM EDT	Special Weather Statement	MLB	Lake, Orange, Seminole, Volusia	92 min
May 24, 3:07 PM EDT	Special Marine Warning	MLB		113 min
May 24, 3:21 PM EDT	Special Weather Statement	MLB	Indian River	39 min
May 24, 3:28 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola, Seminole	32 min
May 24, 4:21 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Seminole, Volusia	24 min
May 24, 4:29 PM EDT	Special Weather Statement	MLB	Brevard, Indian River, Okeechobee, Osceola	91 min
May 24, 4:44 PM EDT	Special Marine Warning	MLB		3 hr
May 24, 4:55 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Orange, Osceola	48 min
May 24, 5:58 PM EDT	Special Weather Statement	MLB	Indian River, Martin, Okeechobee, Saint Lucie	62 min
May 24, 6:55 PM EDT	Special Weather Statement	MLB	Martin, Saint Lucie	50 min

Nearby

Severe Thunderstorm Warnings in Florida, 2017 Every 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.