Alert archive / Florida / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 17, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Apr 22, 2012, 2:49 AM EDT for Orange County, Osceola County, Florida. It was in force for 26 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
- Apr 22, 2012, 2:49 AM EDT (06:49 UTC)
- Expired
- Apr 22, 2012, 3:15 AM EDT
- In force
- 26 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
Counties Orange County, FL, Osceola County, FL
The radar
The Melbourne radar (KMLB), 46 km from the middle of the area, began a volume at 06:51 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 21, 11:08 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 00:00Z, 6.8 hours before the alert went out and 151 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
- 12 J/kg
- Mixed-layer CIN
- -208 J/kg
- Mixed-layer LCL
- 622 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 228 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
811
WUUS52 KMLB 220649
SVRMLB
FLC095-097-220715-
/O.NEW.KMLB.SV.W.0017.120422T0649Z-120422T0715Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
249 AM EDT SUN APR 22 2012
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN OSCEOLA COUNTY IN FLORIDA
SOUTHEASTERN ORANGE COUNTY IN FLORIDA
* UNTIL 315 AM EDT.
* AT 247 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR SAINT CLOUD...AND MOVING
EAST-NORTHEAST AT 40 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
EAST LAKE TOHO...NARCOOSSEE...HARMONY...LAKE MARY JANE AND HOLOPAW
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.
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM EDT SUNDAY MORNING FOR
EASTERN FLORIDA.
&&
LAT...LON 2831 8143 2845 8090 2845 8089 2843 8090
2841 8088 2839 8089 2836 8087 2813 8086
2814 8138
TIME...MOT...LOC 0649Z 256DEG 37KT 2825 8130
$$1 follow-up statement
056
WWUS52 KMLB 220717
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
317 AM EDT SUN APR 22 2012
FLC095-097-220727-
/O.EXP.KMLB.SV.W.0017.000000T0000Z-120422T0715Z/
ORANGE-OSCEOLA-
317 AM EDT SUN APR 22 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN OSCEOLA AND
SOUTHEASTERN ORANGE COUNTIES EXPIRED AT 315 AM...
THE LINE OF SEVERE STORMS THAT PROMPTED THE WARNING HAD WEAKENED
SLIGHTLY...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.
HOWEVERE WIND GUSTS OF 45 TO 50 MPH OR SO ARE STILL LIKELY OCCURRING
WITH THIS LINE. A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM EDT
SUNDAY MORNING FOR EASTERN FLORIDA.
LAT...LON 2831 8143 2845 8090 2845 8089 2843 8090
2841 8088 2839 8089 2836 8087 2813 8086
2814 8138
TIME...MOT...LOC 0649Z 256DEG 37KT 2825 8130
$$The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 1:15 AM EDT | Special Weather Statement | MLB | Lake | 60 min |
| Apr 22, 1:16 AM EDT | Special Weather Statement | MLB | Lake | 59 min |
| Apr 22, 2:15 AM EDT | Special Weather Statement | MLB | Lake, Orange | 75 min |
| Apr 22, 3:01 AM EDT | Special Weather Statement | MLB | Martin, Okeechobee, Saint Lucie | 59 min |
| Apr 22, 3:02 AM EDT | Special Weather Statement | MLB | Brevard, Orange, Seminole, Volusia | 58 min |
| Apr 22, 3:11 AM EDT | Special Marine Warning | MLB | 2 hr | |
| Apr 22, 3:40 AM EDT | Lake Wind Advisory | MLB | Lake, Okeechobee, Orange, Osceola, Seminole, Volusia | 16 hr |
| Apr 22, 3:20 PM EDT | Fire Weather Watch | MLB | Lake, Okeechobee, Orange, Osceola, Seminole, Volusia | 12 hr |
| Apr 22, 4:11 PM EDT | Small Craft Advisory | MLB | 42 hr |
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.