Alert archive / Florida / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 22, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at May 12, 2011, 3:49 PM EDT for Miami-Dade County, Monroe County, Florida. It was in force for 28 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 12, 2011, 3:49 PM EDT (19:49 UTC)
- Expired
- May 12, 2011, 4:17 PM EDT
- In force
- 28 min
- Issued by
- NWS Miami, FL
- Area
- Storm-based polygon
Counties Miami-Dade County, FL, Monroe County, FL
The radar
The Miami radar (KAMX), 28 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.
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 7.8 hours before the alert went out and 47 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
- 1881 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
320 WUUS52 KMFL 121949 SVRMFL FLC086-087-122030- /O.NEW.KMFL.SV.W.0022.110512T1949Z-110512T2030Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 349 PM EDT THU MAY 12 2011 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN MIAMI-DADE COUNTY IN SOUTH FLORIDA. EAST CENTRAL MONROE COUNTY IN SOUTH FLORIDA. * UNTIL 430 PM EDT * AT 344 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 5 MILES NORTHEAST OF SHARK VALLEY OBS TOWER...AND MOVING SOUTH AT 15 MPH. * THE STORM WILL AFFECT... SHARK VALLEY OBS TOWER... AND SURROUNDING COMMUNITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && LAT...LON 2536 8062 2539 8095 2594 8073 2591 8053 TIME...MOT...LOC 1949Z 009DEG 13KT 2570 8071 $$ TINGLER
1 follow-up statement
014 WWUS52 KMFL 122017 SVSMFL SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 417 PM EDT THU MAY 12 2011 FLC086-087-122024- /O.CAN.KMFL.SV.W.0022.000000T0000Z-110512T2030Z/ MONROE FL-MIAMI-DADE FL- 417 PM EDT THU MAY 12 2011 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MIAMI-DADE AND EAST CENTRAL MAINLAND MONROE COUNTIES IS CANCELLED... THE THUNDERSTORMS HAVE WEAKENED BUT WILL STILL MOVE SOUTHWARD AT 15 MPH. RADAR ESTIMATES OF VERY HEAVY RAIN OVER 2 INCHES HAS FALLEN ACROSS THE TAMIAMI TRAIL AND NEAR THE MICCOSUKEE RESORT. THUNDERSTORMS REMAIN IN THE AREA. FREQUENT LIGHTNING...GUSTY WINDS TO 40 MPH...VERY HEAVY RAINFALL AND SMALL HAIL ARE STILL POSSIBLE. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA FOR THE LATEST UPDATES. LAT...LON 2536 8062 2539 8095 2594 8073 2591 8053 TIME...MOT...LOC 2014Z 009DEG 13KT 2561 8073 $$ JR
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 3:01 AM EDT | Red Flag Warning | MFL | Broward | 17 hr |
| May 12, 10:18 AM EDT | Small Craft Advisory for Hazardous Seas | MFL | 42 hr | |
| May 12, 1:40 PM EDT | Special Weather Statement | MFL | Miami-Dade | 50 min |
| May 12, 2:15 PM EDT | Special Weather Statement | MFL | Miami-Dade | 45 min |
| May 12, 2:27 PM EDT | Severe Thunderstorm Warning | MFL | Miami-Dade | 33 min |
| May 12, 2:46 PM EDT | Special Weather Statement | MFL | Collier | 44 min |
| May 12, 3:02 PM EDT | Special Weather Statement | MFL | Miami-Dade | 58 min |
| May 12, 3:24 PM EDT | Special Weather Statement | MFL | Collier | 66 min |
| May 12, 3:47 PM EDT | Special Weather Statement | MFL | Monroe | 58 min |
| May 12, 6:51 PM EDT | Special Weather Statement | MFL | Collier | 24 min |
| May 12, 7:33 PM EDT | Special Weather Statement | MFL | Collier | 27 min |
| May 12, 7:47 PM EDT | Special Marine Warning | MFL | 28 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2011Every severe thunderstorm warning in 2011
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.