Alert archive / Florida / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 13, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at May 21, 2009, 1:34 AM EDT for Palm Beach County, Florida. It was in force for 41 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 21, 2009, 1:34 AM EDT (05:34 UTC)
- Expired
- May 21, 2009, 2:15 AM EDT
- In force
- 41 min
- Issued by
- NWS Miami, FL
- Area
- Storm-based polygon
County Palm Beach County, FL
The radar
The Miami radar (KAMX), 112 km from the middle of the area, began a volume at 05:37 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
Miami, FL (KMFL), launched 00:00Z, 5.6 hours before the alert went out and 87 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
- 7 J/kg
- Mixed-layer CIN
- -154 J/kg
- Mixed-layer LCL
- 1797 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS52 KMFL 210534
SVRMFL
FLC099-210615-
/O.NEW.KMFL.SV.W.0013.090521T0534Z-090521T0615Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
134 AM EDT THU MAY 21 2009
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL PALM BEACH COUNTY IN SOUTH FLORIDA.
* UNTIL 215 AM EDT
* AT 133 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
OCEAN RIDGE...AND MOVING NORTHWEST AT 15 MPH.
* THE STORM WILL AFFECT...
OCEAN RIDGE...
BOYNTON BEACH...
LAKE WORTH...
GREENACRES CITY...
AND SURROUNDING COMMUNITIES.
SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 60
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
FREQUENT LIGHTNING IS OCCURRING WITH THIS THUNDERSTORM. IF
OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES AND
AVOID WATER. MOVE INDOORS OR INSIDE A VEHICLE IF POSSIBLE. AVOID
USING THE TELEPHONE UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG
UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.
LAT...LON 2655 8004 2651 8004 2648 8005 2648 8006
2664 8037 2681 8017 2665 8003 2655 8003
TIME...MOT...LOC 0534Z 137DEG 12KT 2653 8006
$$
DG2 follow-up statements
193
WWUS52 KMFL 210558
SVSMFL
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
158 AM EDT THU MAY 21 2009
FLC099-210615-
/O.CON.KMFL.SV.W.0013.000000T0000Z-090521T0615Z/
PALM BEACH FL-
158 AM EDT THU MAY 21 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 AM EDT
FOR EAST CENTRAL PALM BEACH COUNTY...
AT 157 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR ATLANTIS...MOVING NORTHWEST AT 15 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
ATLANTIS...
PALM SPRINGS...
GREENACRES CITY...
FLORIDA GARDENS...
AND SURROUNDING COMMUNITIES.
SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 60
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI. OR YOU CAN
ALSO CALL THE NATIONAL WEATHER SERVICE IN MIAMI DIRECTLY AT
305.229.4528 TO REPORT SEVERE WEATHER.
LAT...LON 2656 8005 2654 8006 2652 8007 2652 8009
2664 8037 2681 8017 2665 8003
TIME...MOT...LOC 0558Z 137DEG 12KT 2659 8012
$$
DG693
WWUS52 KMFL 210611
SVSMFL
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
211 AM EDT THU MAY 21 2009
FLC099-210621-
/O.EXP.KMFL.SV.W.0013.000000T0000Z-090521T0615Z/
PALM BEACH FL-
211 AM EDT THU MAY 21 2009
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PALM BEACH COUNTY
WILL EXPIRE AT 215 AM EDT...
NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORM HAS
WEAKENED. THUS...THE SEVERE THUNDERSTORM WARNING WILL EXPIRE AT
215 AM EDT.
HOWEVER...THUNDERSTORMS REMAIN IN THE AREA. FREQUENT
LIGHTNING...GUSTY WINDS TO 40 MPH...VERY HEAVY RAINFALL AND SMALL
HAIL ARE STILL POSSIBLE. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL
MEDIA FOR THE LATEST UPDATES.
LAT...LON 2656 8005 2654 8006 2652 8007 2652 8009
2664 8037 2681 8017 2665 8003
TIME...MOT...LOC 0611Z 137DEG 12KT 2662 8015
$$
DGThe office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 8:27 PM EDT | Special Marine Warning | MFL | 63 min | |
| May 20, 8:34 PM EDT | Special Marine Warning | MFL | 56 min | |
| May 21, 12:11 AM EDT | Special Marine Warning | MFL | 64 min | |
| May 21, 12:33 AM EDT | Special Weather Statement | MFL | Martin | 27 min |
| May 21, 12:59 AM EDT | Special Weather Statement | MFL | Martin | 31 min |
| May 21, 1:08 AM EDT | Special Marine Warning | MFL | 37 min | |
| May 21, 1:12 AM EDT | Special Marine Warning | MFL | 63 min | |
| May 21, 1:27 AM EDT | Special Weather Statement | MFL | Palm Beach | 33 min |
| May 21, 1:31 AM EDT | Special Marine Warning | MFL | 119 min | |
| May 21, 1:37 AM EDT | Special Weather Statement | MFL | Martin | 38 min |
| May 21, 2:09 AM EDT | Special Marine Warning | MFL | 2 hr | |
| May 21, 2:25 AM EDT | Special Weather Statement | MFL | Broward | 50 min |
| May 21, 2:40 AM EDT | Special Weather Statement | MFL | Broward | 35 min |
| May 21, 2:47 AM EDT | Special Marine Warning | MFL | 118 min | |
| May 21, 3:03 AM EDT | Special Weather Statement | MFL | Palm Beach | 57 min |
| May 21, 6:43 AM EDT | Special Marine Warning | MFL | 62 min | |
| May 21, 9:22 AM EDT | Coastal Flood Statement | MFL | Broward, Miami-Dade, Palm Beach | 11 hr |
| May 21, 10:10 AM EDT | Special Weather Statement | MFL | Broward | 65 min |
| May 21, 10:12 AM EDT | Special Weather Statement | MFL | Broward | 63 min |
| May 21, 10:43 AM EDT | Areal Flood Advisory | MFL | Broward, Palm Beach | 107 min |
| May 21, 2:09 PM EDT | Special Weather Statement | MFL | Broward | 66 min |
| May 21, 6:23 PM EDT | Special Weather Statement | MFL | Hendry | 52 min |
| May 21, 7:12 PM EDT | Special Weather Statement | MFL | Hendry | 63 min |
| May 21, 7:31 PM EDT | Special Marine Warning | MFL | 59 min | |
| May 21, 7:58 PM EDT | Special Weather Statement | MFL | Palm Beach | 62 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2009Every severe thunderstorm warning in 2009
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.