Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Miami, FL

October 9, 2021Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at Oct 9, 2021, 4:11 PM EDT for Miami-Dade County, Florida. It was in force for 34 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: Oct 9, 2021, 4:11 PM EDT (20:11 UTC)
Expired: Oct 9, 2021, 4:45 PM EDT
In force: 34 min
Issued by: NWS Miami, FL
Hail: 0.00 in
Wind: 40

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 39 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 16 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 103 J/kg
Mixed-layer CIN: -279 J/kg
Mixed-layer LCL: 1522 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

324 
WWUS82 KMFL 092011
SPSMFL

Special Weather Statement
National Weather Service Miami FL
411 PM EDT Sat Oct 9 2021
 
FLZ074-173-092045-
Metropolitan Miami Dade FL-Coastal Miami Dade County FL-
411 PM EDT Sat Oct 9 2021

...A strong thunderstorm will impact portions of northern Miami-Dade
County through 445 PM EDT...

At 411 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over
Surfside, moving northeast at 25 mph.

HAZARD...Funnel clouds and winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Funnel clouds occasionally touch down and produce tornadoes 
         or waterspouts. Gusty winds could knock down tree limbs and 
         blow around unsecured objects.

Locations impacted include...
Miami, Miami Beach, Surfside, Miami Gardens, North Miami, North Miami
Beach, Aventura, Sunny Isles Beach, Miami Shores, North Bay Village,
El Portal, Golden Glades, Ojus, Bay Harbor Islands, Biscayne Park,
Bal Harbour and Fiu North Campus.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 2582 8019 2595 8020 2594 8007 2581 8007
TIME...MOT...LOC 2011Z 241DEG 20KT 2587 8014 

FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Hadi

The office that day

Everything else NWS Miami, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 8, 8:11 PM EDT	Special Weather Statement	MFL	Palm Beach	34 min
Oct 8, 8:28 PM EDT	Special Weather Statement	MFL	Palm Beach	47 min
Oct 8, 9:05 PM EDT	Special Weather Statement	MFL	Palm Beach	40 min
Oct 8, 9:24 PM EDT	Areal Flood Advisory	MFL	Palm Beach	2 hr
Oct 8, 9:39 PM EDT	Special Weather Statement	MFL	Palm Beach	51 min
Oct 8, 9:59 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	46 min
Oct 8, 10:15 PM EDT	Special Weather Statement	MFL	Broward	30 min
Oct 8, 10:39 PM EDT	Special Weather Statement	MFL	Broward	36 min
Oct 9, 12:28 AM EDT	Special Weather Statement	MFL	Miami-Dade	32 min
Oct 9, 12:55 AM EDT	Special Weather Statement	MFL	Miami-Dade	35 min
Oct 9, 1:04 AM EDT	Areal Flood Advisory	MFL	Broward, Miami-Dade	116 min
Oct 9, 1:32 AM EDT	Special Weather Statement	MFL	Miami-Dade, Monroe	28 min
Oct 9, 1:39 AM EDT	Areal Flood Advisory	MFL	Miami-Dade	2 hr
Oct 9, 8:22 AM EDT	Coastal Flood Statement	MFL	Broward, Miami-Dade, Palm Beach	30 hr
Oct 9, 12:22 PM EDT	Special Weather Statement	MFL	Glades	53 min
Oct 9, 12:43 PM EDT	Special Marine Warning	MFL		62 min
Oct 9, 12:53 PM EDT	Special Marine Warning	MFL		67 min
Oct 9, 12:58 PM EDT	Special Weather Statement	MFL	Glades	32 min
Oct 9, 1:05 PM EDT	Special Weather Statement	MFL	Hendry	40 min
Oct 9, 1:34 PM EDT	Special Weather Statement	MFL	Hendry	41 min
Oct 9, 1:40 PM EDT	Special Marine Warning	MFL		65 min
Oct 9, 1:45 PM EDT	Special Weather Statement	MFL	Broward	45 min
Oct 9, 1:48 PM EDT	Special Marine Warning	MFL		27 min
Oct 9, 2:09 PM EDT	Special Weather Statement	MFL	Palm Beach	51 min
Oct 9, 2:13 PM EDT	Special Marine Warning	MFL		2 hr
Oct 9, 2:34 PM EDT	Special Weather Statement	MFL	Broward	41 min
Oct 9, 2:36 PM EDT	Special Marine Warning	MFL		84 min
Oct 9, 2:40 PM EDT	Special Weather Statement	MFL	Martin	65 min
Oct 9, 2:48 PM EDT	Areal Flood Advisory	MFL	Palm Beach	3 hr
Oct 9, 2:48 PM EDT	Areal Flood Advisory	MFL	Palm Beach	3 hr
Oct 9, 3:12 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	33 min
Oct 9, 3:14 PM EDT	Special Weather Statement	MFL	Broward	31 min
Oct 9, 3:29 PM EDT	Special Weather Statement	MFL	Monroe	31 min
Oct 9, 3:44 PM EDT	Special Weather Statement	MFL	Martin	31 min
Oct 9, 4:06 PM EDT	Special Marine Warning	MFL		54 min
Oct 9, 4:30 PM EDT	Special Weather Statement	MFL	Monroe	30 min
Oct 9, 6:20 PM EDT	Special Weather Statement	MFL	Collier	55 min

Nearby

Special Weather Statements in Florida, 2021 Every special weather statement in 2021

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.