Alert archive / Florida / Flood Watches in 2021
Flood Watch 2, NWS Key West, FL
NWS Key West, FL issued this flood watch at Aug 13, 2021, 4:43 AM EDT for Monroe County, Florida. It took effect at Aug 13, 2021, 6:00 PM EDT. It was in force for 33 hr.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2021, 4:43 AM EDT (08:43 UTC)
- In effect from
- Aug 13, 2021, 6:00 PM EDT
- Expired
- Aug 15, 2021, 2:45 AM EDT
- In force
- 33 hr
- Issued by
- NWS Key West, FL
- Flood severity
- None
County Monroe County, FL
The radar
The Miami radar (KAMX), 51 km from the middle of the area, began a volume at 08:45 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, 8.7 hours before the alert went out and 69 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
- 725 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1160 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
387 WGUS62 KKEY 130843 FFAKEY URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Key West FL 443 AM EDT Fri Aug 13 2021 .Tropical Depression Fred will move west-northwest from the Straits of Florida, across the Florida Keys, and into the southeastern Gulf of Mexico Friday night through Saturday. As Fred moves across the area, deep tropical moisture will surge across the area. This will result in heavy rainfall across much of the Florida Keys. The potential for heavy rain will continue into Saturday night due to trailing bands of heavy rain. FLZ076>078-132230- /O.NEW.KKEY.FA.A.0002.210813T2200Z-210815T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the cities of Key West, Marathon, and Key Largo 443 AM EDT Fri Aug 13 2021 ...FLOOD WATCH IN EFFECT FROM THIS EVENING THROUGH LATE SATURDAY NIGHT... The National Weather Service in Key West has issued a * Flood Watch for A portion of Florida, including the following areas, Middle Keys in Monroe County, Upper Keys in Monroe County and Lower Keys in Monroe County. * From this evening through late Saturday night. * Rainfall totals of 3 to 6 inches, with localized maximum totals of 8 inches. Potential flooding from heavy rainfall will be aggravated during the times of high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ LIW
5 follow-up statements
422 WGUS62 KKEY 132132 FFAKEY Flood Watch National Weather Service Key West FL 532 PM EDT Fri Aug 13 2021 .Tropical Depression Fred will gradually turn northwestward moving off Cuba's northern coast early Saturday morning into our western Florida Straits. As Fred moves across the area, deep tropical moisture will surge across much of the Florida Keys, resulting in rounds of heavy rainfall. This potential for heavy rain will continue into Saturday night due to trailing bands of heavy rain. FLZ076>078-140545- /O.CON.KKEY.FA.A.0002.210813T2200Z-210815T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the cities of Key West, Marathon, and Key Largo 532 PM EDT Fri Aug 13 2021 ...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SATURDAY NIGHT... The Flood Watch continues for * A portion of Florida, including the following areas, Middle Keys in Monroe County, Upper Keys in Monroe County and Lower Keys in Monroe County. * Through late Saturday night. * Additional rainfall of 3 to 6 inches, with locally higher amounts. Potential flooding from heavy rainfall enhanced during high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ SD
278 WGUS62 KKEY 140525 FFAKEY Flood Watch National Weather Service Key West FL 125 AM EDT Sat Aug 14 2021 .Tropical Depression Fred will gradually turn northwestward moving off Cuba's northern coast early this morning into our western Florida Straits. As Fred moves across the area, deep tropical moisture will surge across much of the Florida Keys, resulting in rounds of heavy rainfall. This potential for heavy rain will continue into tonight due to trailing bands of heavy rain. FLZ076>078-141745- /O.CON.KKEY.FA.A.0002.000000T0000Z-210815T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the cities of Key West, Marathon, and Key Largo 125 AM EDT Sat Aug 14 2021 ...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY MORNING... The Flood Watch continues for * A portion of Florida, including the following areas, Middle Keys in Monroe County, Upper Keys in Monroe County and Lower Keys in Monroe County. * Through late tonight. * Between 0.5 and 1.5 inches have already fallen across the Florida Keys in the past 24 hours and an additional 3 to 5 inches, with locally higher amounts possible. Potential flooding from heavy rainfall enhanced during high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ LIW
458 WGUS62 KKEY 141540 FFAKEY Flood Watch National Weather Service Key West FL 1140 AM EDT Sat Aug 14 2021 .The remnants of Fred will continue to move northwestward through our western waters this afternoon and out into the Gulf of Mexico this evening. Deep tropical moisture will continue to produce occasional squalls across much of the Florid Keys through this afternoon and evening. FLZ076>078-142345- /O.CON.KKEY.FA.A.0002.000000T0000Z-210815T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the cities of Key West, Marathon, and Key Largo 1140 AM EDT Sat Aug 14 2021 ...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flood Watch continues for * A portion of Florida, including the following areas, Middle Keys in Monroe County, Upper Keys in Monroe County and Lower Keys in Monroe County. * Through late tonight. * Over the past couple of days between one and two inches of rainfall has accumulated across the Florida Keys. An additional 2 to 4 inches will be possible in isolated locations along the Florida Keys. Potential flooding may be enhanced during local high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ SD
593 WGUS62 KKEY 150328 FFAKEY Flood Watch National Weather Service Key West FL 1128 PM EDT Sat Aug 14 2021 .The remnants of Fred will continue to move northwestward through our western waters overnight and out into the Gulf of Mexico early tomorrow morning. Deep tropical moisture will continue to produce occasional squalls across the Lower Keys through through the early morning hours. FLZ076-077-150430- /O.CAN.KKEY.FA.A.0002.000000T0000Z-210815T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe Upper Keys-Monroe Middle Keys- Including the cities of Marathon and Key Largo 1128 PM EDT Sat Aug 14 2021 ...FLOOD WATCH IS CANCELLED... The Flood Watch for A portion of Florida, including the following areas, Middle Keys in Monroe County and Upper Keys in Monroe County has been cancelled. The Flood Watch is cancelled. $$ FLZ078-151000- /O.CON.KKEY.FA.A.0002.000000T0000Z-210815T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe Lower Keys- Including the cities of Key West 1128 PM EDT Sat Aug 14 2021 ...FLOOD WATCH REMAINS IN EFFECT UNTIL LATE TONIGHT... The Flood Watch continues for * A portion of Florida, including the following area, Lower Keys in Monroe County. * Until 6 AM EDT Sunday. * Over the past couple of days between one and three inches of rainfall has accumulated across the Florida Keys. An additional 1 to 2 inches will be possible in isolated locations along the Florida Keys. Potential flooding may be enhanced during local high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ NB
692 WGUS62 KKEY 150645 FFAKEY Flood Watch National Weather Service Key West FL 245 AM EDT Sun Aug 15 2021 FLZ078-150745- /O.CAN.KKEY.FA.A.0002.000000T0000Z-210815T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe Lower Keys- Including the cities of Key West 245 AM EDT Sun Aug 15 2021 ...FLOOD WATCH IS CANCELLED... The Flood Watch for the Lower Keys in Monroe County has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. $$ NB
The office that day
Everything else NWS Key West, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 8:16 PM EDT | Special Marine Warning | KEY | 29 min | |
| Aug 12, 8:50 PM EDT | Special Marine Warning | KEY | 55 min | |
| Aug 12, 9:00 PM EDT | Special Marine Warning | KEY | 45 min | |
| Aug 13, 12:49 AM EDT | Areal Flood Advisory | KEY | Monroe | 3 hr |
| Aug 13, 4:55 AM EDT | Tropical Storm Warning | KEY | Monroe | 30 hr |
Nearby
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.