Alert archive / Florida / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 35, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at May 18, 2012, 6:34 PM EDT for Okeechobee County, Saint Lucie County, Florida. It was in force for 42 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, 6:34 PM EDT (22:34 UTC)
- Expired
- May 18, 2012, 7:16 PM EDT
- In force
- 42 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
Counties Okeechobee County, FL, Saint Lucie County, FL
The radar
The Melbourne radar (KMLB), 98 km from the middle of the area, began a volume at 22:36 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, 10.6 hours before the alert went out and 139 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.
417
WUUS52 KMLB 182234
SVRMLB
FLC093-111-182330-
/O.NEW.KMLB.SV.W.0035.120518T2234Z-120518T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
634 PM EDT FRI MAY 18 2012
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN OKEECHOBEE COUNTY IN FLORIDA
SOUTHWESTERN ST. LUCIE COUNTY IN FLORIDA
* UNTIL 730 PM EDT.
* AT 631 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER
SOUTHEASTERN OKEECHOBEE COUNTY...OR 8 MILES EAST OF OKEECHOBEE...
AND MOVING NORTHEAST AT 15 MPH.
* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
AREAS OF SOUTHEAST OKEECHOBEE AND SOUTHWEST SAINT LUCIE 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 2718 8069 2726 8077 2738 8062 2726 8053
2720 8065 2720 8067 2719 8068
TIME...MOT...LOC 2233Z 235DEG 12KT 2723 8070
$$
PB2 follow-up statements
637
WWUS52 KMLB 182255
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
655 PM EDT FRI MAY 18 2012
FLC093-182304-
/O.CAN.KMLB.SV.W.0035.000000T0000Z-120518T2330Z/
OKEECHOBEE-
655 PM EDT FRI MAY 18 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OKEECHOBEE COUNTY
IS CANCELLED...
LAT...LON 2732 8068 2738 8062 2730 8056 2726 8053
2720 8065 2720 8067 2721 8068
TIME...MOT...LOC 2254Z 235DEG 12KT 2728 8063
$$
FLC111-182330-
/O.CON.KMLB.SV.W.0035.000000T0000Z-120518T2330Z/
ST. LUCIE-
655 PM EDT FRI MAY 18 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHWESTERN ST. LUCIE COUNTY...
AT 651 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED OVER SOUTHWESTERN ST. LUCIE COUNTY...OR
12 MILES EAST OF OKEECHOBEE...MOVING NORTHEAST AT 15 MPH.
THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF SAINT LUCIE COUNTY ALONG AND JUST SOUTH OF ROUTE 70.
LAT...LON 2732 8068 2738 8062 2730 8056 2726 8053
2720 8065 2720 8067 2721 8068
TIME...MOT...LOC 2254Z 235DEG 12KT 2728 8063
$$
PB053
WWUS52 KMLB 182316
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
716 PM EDT FRI MAY 18 2012
FLC111-182326-
/O.CAN.KMLB.SV.W.0035.000000T0000Z-120518T2330Z/
ST. LUCIE-
716 PM EDT FRI MAY 18 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ST. LUCIE COUNTY
IS CANCELLED...
THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO
LONGER CAPABLE OF PRODUCING LARGE HAIL OR DAMAGING WINDS. AS A
RESULT...THE WARNING HAS BEEN CANCELLED. HOWEVER...HEAVY RAIN AND
DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE.
LAT...LON 2732 8068 2738 8062 2730 8056 2726 8053
2720 8065 2720 8067 2721 8068
TIME...MOT...LOC 2316Z 235DEG 12KT 2732 8056
$$
PBThe 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, 4:57 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Osceola | 35 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, 6:54 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.