Alert archive / Florida / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 34, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at May 18, 2012, 4:57 PM EDT for Orange County, Osceola County, Florida. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 18, 2012, 4:57 PM EDT (20:57 UTC)
- Expired
- May 18, 2012, 5:32 PM EDT
- In force
- 35 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
Counties Orange County, FL, Osceola County, FL
The radar
The Melbourne radar (KMLB), 37 km from the middle of the area, began a volume at 20:57 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.
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 9.0 hours before the alert went out and 44 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.
- Mixed-layer CAPE
- 309 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1062 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
290
WUUS52 KMLB 182057
SVRMLB
FLC095-097-182200-
/O.NEW.KMLB.SV.W.0034.120518T2057Z-120518T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
457 PM EDT FRI MAY 18 2012
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN ORANGE COUNTY IN FLORIDA
NORTHEASTERN OSCEOLA COUNTY IN FLORIDA
* UNTIL 600 PM EDT.
* AT 450 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER
SOUTHEASTERN ORANGE COUNTY...OR 9 MILES WEST OF LONE CABBAGE FISH
CAMP...AND MOVING SOUTHEAST AT 15 MPH.
* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
AREAS OF THE INDICATED COUNTIES.
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.
&&
LAT...LON 2823 8087 2831 8109 2843 8103 2842 8089
2841 8088 2839 8089 2837 8088
TIME...MOT...LOC 2057Z 300DEG 13KT 2836 8099
$$
KELLY2 follow-up statements
048 WWUS52 KMLB 182113 SVSMLB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 513 PM EDT FRI MAY 18 2012 FLC095-182122- /O.CAN.KMLB.SV.W.0034.000000T0000Z-120518T2200Z/ ORANGE- 513 PM EDT FRI MAY 18 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ORANGE COUNTY IS CANCELLED... LAT...LON 2834 8098 2835 8088 2823 8087 2828 8102 TIME...MOT...LOC 2112Z 300DEG 13KT 2829 8093 $$ FLC097-182200- /O.CON.KMLB.SV.W.0034.000000T0000Z-120518T2200Z/ OSCEOLA- 513 PM EDT FRI MAY 18 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT FOR NORTHEASTERN OSCEOLA COUNTY... AT 507 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER NORTHEASTERN OSCEOLA COUNTY...OR 7 MILES SOUTHWEST OF LONE CABBAGE FISH CAMP...MOVING SOUTHEAST AT 15 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY BUT CROSS NOVA ROAD. LAT...LON 2834 8098 2835 8088 2823 8087 2828 8102 TIME...MOT...LOC 2112Z 300DEG 13KT 2829 8093 $$ KELLY
341 WWUS52 KMLB 182132 SVSMLB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 532 PM EDT FRI MAY 18 2012 FLC097-182141- /O.CAN.KMLB.SV.W.0034.000000T0000Z-120518T2200Z/ OSCEOLA- 532 PM EDT FRI MAY 18 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OSCEOLA COUNTY IS CANCELLED... THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER CAPABLE OF PRODUCING LARGE HAIL OR DAMAGING WINDS. AS A RESULT...THE WARNING HAS BEEN CANCELLED. HOWEVER...HEAVY RAIN AND DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE. LAT...LON 2834 8098 2835 8088 2823 8087 2828 8102 TIME...MOT...LOC 2131Z 300DEG 13KT 2826 8086 $$
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 8:00 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Seminole, Volusia | 60 min |
| May 17, 8:13 PM EDT | Special Marine Warning | MLB | 2 hr | |
| May 17, 8:16 PM EDT | Special Weather Statement | MLB | Orange, Seminole | 44 min |
| May 17, 8:58 PM EDT | Special Weather Statement | MLB | Seminole | 47 min |
| May 17, 9:29 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Orange | 51 min |
| May 17, 9:43 PM EDT | Special Marine Warning | MLB | 76 min | |
| May 18, 4:50 PM EDT | Special Weather Statement | MLB | Brevard | 40 min |
| May 18, 5:44 PM EDT | Special Weather Statement | MLB | Brevard | 46 min |
| May 18, 6:03 PM EDT | Special Weather Statement | MLB | Okeechobee | 42 min |
| May 18, 6:34 PM EDT | Severe Thunderstorm Warning | MLB | Okeechobee, Saint Lucie | 42 min |
| May 18, 6:54 PM EDT | Special Weather Statement | MLB | Martin | 66 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2012Every severe thunderstorm warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.