Alert archive / Florida / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 1, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Apr 6, 2012, 9:53 AM EDT for Collier County, Hendry County, Florida. It was in force for 37 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 6, 2012, 9:53 AM EDT (13:53 UTC)
- Expired
- Apr 6, 2012, 10:30 AM EDT
- In force
- 37 min
- Issued by
- NWS Miami, FL
- Area
- Storm-based polygon
Counties Collier County, FL, Hendry County, FL
The radar
The Miami radar (KAMX), 122 km from the middle of the area, began a volume at 13:56 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 6, 9:55 AM EDT | HAIL 1 | 6 N Golden Gate, FL | REPORTED NEAR COLLIER BOULEVARD 1 MILE SOUTH OF IMMOKALEE ROAD. |
| Apr 6, 9:58 AM EDT | TSTM WND GST 46 | 2 Nne North Blocks Gold, FL | MEASURED AT SABAL PALM ELEMENTARY SCHOOL. TIME ESTIMATED BASED ON RADAR AND NEARBY OBSERVATIONS. |
| Apr 6, 10:00 AM EDT | HAIL 1 | East Naples, FL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 1.9 hours before the alert went out and 121 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
- 2930 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 478 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 257 m²/s²
- Significant tornado parameter
- 3.7
- Supercell composite
- 16.2
The text
As transmitted, in the capitals the NWS used until 2016.
375 WUUS52 KMFL 061353 SVRMFL FLC021-051-061430- /O.NEW.KMFL.SV.W.0001.120406T1353Z-120406T1430Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 953 AM EDT FRI APR 6 2012 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL HENDRY COUNTY IN SOUTH FLORIDA. CENTRAL COLLIER COUNTY IN SOUTH FLORIDA. * UNTIL 1030 AM EDT * AT 951 AM 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 NEAR WEST TOLL GATE ON ALLIGATOR ALLEY...AND MOVING EAST AT 45 MPH. STORM SPOTTERS REPORTED PENNY SIZED TO QUARTER SIZE HAIL WITH THIS STORM * THE STORM WILL AFFECT... GOLDEN GATE ESTATES... AVE MARIA... INTERSECTION ALLIGATOR ALLEY AND SR 29... HENDRY CORRECTIONAL I/A/P... AND SURROUNDING COMMUNITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && LAT...LON 2643 8119 2607 8109 2602 8175 2628 8181 TIME...MOT...LOC 1353Z 264DEG 37KT 2616 8160 $$ AK
2 follow-up statements
387 WWUS52 KMFL 061404 SVSMFL SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 1004 AM EDT FRI APR 6 2012 FLC021-051-061430- /O.CON.KMFL.SV.W.0001.000000T0000Z-120406T1430Z/ HENDRY FL-COLLIER FL- 1004 AM EDT FRI APR 6 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT FOR CENTRAL COLLIER AND SOUTH CENTRAL HENDRY COUNTIES... AT 1000 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM PRODUCING LARGE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR INTERSECTION I-75 AND EVERGLADES BLVD...MOVING EAST AT 45 MPH. TRAINED SPOTTERS REPORTED QUARTER SIZED HAIL IN THE GOLDEN GATE AREA. SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 2630 8165 2643 8119 2607 8109 2603 8159 TIME...MOT...LOC 1402Z 264DEG 37KT 2617 8150 $$ AK
279 WWUS52 KMFL 061422 SVSMFL SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 1022 AM EDT FRI APR 6 2012 FLC021-051-061432- /O.EXP.KMFL.SV.W.0001.000000T0000Z-120406T1430Z/ HENDRY FL-COLLIER FL- 1022 AM EDT FRI APR 6 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL COLLIER AND SOUTH CENTRAL HENDRY COUNTIES WILL EXPIRE AT 1030 AM EDT... NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORM HAS WEAKENED. THUS THE THUNDERSTORM WARNING WILL EXPIRE AT 1030 AM EDT. LAT...LON 2630 8165 2643 8119 2607 8109 2603 8159 TIME...MOT...LOC 1422Z 264DEG 37KT 2619 8127 $$ AK
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 9:09 AM EDT | Special Marine Warning | MFL | 51 min | |
| Apr 6, 9:29 AM EDT | Special Marine Warning | MFL | 46 min | |
| Apr 6, 9:48 AM EDT | Special Weather Statement | MFL | Collier | 42 min |
| Apr 6, 10:12 AM EDT | Special Marine Warning | MFL | 33 min | |
| Apr 6, 10:13 AM EDT | Special Weather Statement | MFL | Collier | 32 min |
| Apr 6, 10:50 AM EDT | Special Marine Warning | MFL | 55 min | |
| Apr 6, 11:18 AM EDT | Special Marine Warning | MFL | 57 min | |
| Apr 6, 11:21 AM EDT | Special Weather Statement | MFL | Collier | 24 min |
| Apr 6, 11:39 AM EDT | Special Weather Statement | MFL | Broward | 36 min |
| Apr 6, 11:46 AM EDT | Severe Thunderstorm Warning | MFL | Broward, Palm Beach | 12 min |
| Apr 6, 11:51 AM EDT | Special Marine Warning | MFL | 43 min | |
| Apr 6, 1:00 PM EDT | Special Weather Statement | MFL | Broward | 30 min |
| Apr 6, 1:29 PM EDT | Special Weather Statement | MFL | Broward | 31 min |
| Apr 6, 1:39 PM EDT | Severe Thunderstorm Warning | MFL | Broward, Miami-Dade | 17 min |
| Apr 6, 1:42 PM EDT | Special Marine Warning | MFL | 33 min | |
| Apr 6, 1:58 PM EDT | Special Marine Warning | MFL | 62 min | |
| Apr 6, 2:56 PM EDT | Special Marine Warning | MFL | 64 min | |
| Apr 6, 3:36 PM EDT | Special Marine Warning | MFL | 39 min | |
| Apr 6, 4:00 PM EDT | Special Marine Warning | MFL | 45 min | |
| Apr 6, 4:13 PM EDT | Small Craft Advisory | MFL | 48 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.