Alert archive / Alabama / Flash Flood Watches in 2017
Flash Flood Watch 13, NWS Mobile, AL
NWS Mobile, AL issued this flash flood watch at May 20, 2017, 8:56 PM CDT for Baldwin County, Escambia County, Mobile County, Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- May 20, 2017, 8:56 PM CDT (01:56 UTC)
- Expired
- May 21, 2017, 3:47 AM CDT
- In force
- 7 hr
- Issued by
- NWS Mobile, AL
- Flood severity
- None
Counties Baldwin County, AL, Escambia County, AL, Mobile County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL
The radar
The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 01:58 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 1.9 hours before the alert went out and 232 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
- 3071 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 745 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
158 WGUS64 KMOB 210156 FFAMOB URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mobile AL 856 PM CDT Sat May 20 2017 ...FLASH FLOOD WATCH FOR LOWER PARTS OF SOUTHWEST ALABAMA AND ALL AREAS OF NORTHWEST FLORIDA UNTIL 7 AM CDT SUNDAY... .Heavy rainfall expected over the coastal counties of Alabama and all areas in Northwest Florida through tonight. Rainfall rates of 2 inches or slightly better per hour are expected with the heavier thunderstorms through tonight. The best chance for flash flooding with be generally along and south of a line stretching from north Mobile County to Brewton in Alabama, including all areas in Northwest Florida. ALZ059-261>266-FLZ201>206-211000- /O.NEW.KMOB.FF.A.0013.170521T0156Z-170521T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Escambia-Mobile Inland-Baldwin Inland-Mobile Central- Baldwin Central-Mobile Coastal-Baldwin Coastal-Escambia Inland- Escambia Coastal-Santa Rosa Inland-Santa Rosa Coastal- Okaloosa Inland-Okaloosa Coastal- Including the cities of Atmore, Brewton, Flomaton, Citronelle, Saraland, Stockton, Mobile, Prichard, Theodore, Bay Minette, Daphne, Fairhope, Foley, Spanish Fort, Bayou La Batre, Dauphin Island, Grand Bay, Fort Morgan, Gulf Shores, Orange Beach, Century, Molino, Walnut Hill, Beulah, Ensley, Fort Pickens, Pensacola, Pensacola Beach, Perdido Bay, Jay, Milton, Bagdad, Gulf Breeze, Navarre, Crestview, Destin, Eglin AFB, Fort Walton Beach, Niceville, Seminole, Valparaiso, and Wright 856 PM CDT Sat May 20 2017 ...FLASH FLOOD WATCH IN EFFECT UNTIL 7 AM CDT SUNDAY... The National Weather Service in Mobile has issued a * Flash Flood Watch for portions of Alabama and northwest Florida, including the following areas, in Alabama, Baldwin Central, Baldwin Coastal, Baldwin Inland, Escambia, Mobile Central, Mobile Coastal, and Mobile Inland. In northwest Florida, Escambia Coastal, Escambia Inland, Okaloosa Coastal, Okaloosa Inland, Santa Rosa Coastal, and Santa Rosa Inland. * Until 7 AM CDT Sunday * Heavy rain has occurred for several hours over western sections of the watch area and will continue through most of tonight also spreading eastward over Northwest Florida late tonight and early Sunday morning. * Additional rainfall totals of 2 to 4 inches will be likely in the watch area through tonight with locally higher amounts also possible. * PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a VERY DANGEROUS SITUATION. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
1 follow-up statement
454 WGUS64 KMOB 210847 FFAMOB Flood Watch National Weather Service Mobile AL 347 AM CDT Sun May 21 2017 ...The Flash Flood Watch Has Been Cancelled... .The Flash Flood Watch in effect for Coastal Alabama and the Western Florida Panhandle has been cancelled. ALZ059-261>266-FLZ201>206-211000- /O.CAN.KMOB.FF.A.0013.000000T0000Z-170521T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Escambia-Mobile Inland-Baldwin Inland-Mobile Central- Baldwin Central-Mobile Coastal-Baldwin Coastal-Escambia Inland- Escambia Coastal-Santa Rosa Inland-Santa Rosa Coastal- Okaloosa Inland-Okaloosa Coastal- Including the cities of Atmore, Brewton, Flomaton, Citronelle, Saraland, Stockton, Mobile, Prichard, Theodore, Bay Minette, Daphne, Fairhope, Foley, Spanish Fort, Bayou La Batre, Dauphin Island, Grand Bay, Fort Morgan, Gulf Shores, Orange Beach, Century, Molino, Walnut Hill, Beulah, Ensley, Fort Pickens, Pensacola, Pensacola Beach, Perdido Bay, Jay, Milton, Bagdad, Gulf Breeze, Navarre, Crestview, Destin, Eglin AFB, Fort Walton Beach, Niceville, Seminole, Valparaiso, and Wright 347 AM CDT Sun May 21 2017 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of Alabama and northwest Florida has been cancelled. The the heavy rains have subsided over the watch area, with significant heavy rain not expected through tonight. $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 7:06 PM CDT | Areal Flood Advisory | MOB | Mobile | 3 hr |
| May 20, 7:19 PM CDT | Special Weather Statement | MOB | Mobile | 41 min |
| May 20, 7:38 PM CDT | Flash Flood Warning | MOB | Mobile | 6 hr |
| May 20, 7:46 PM CDT | Special Weather Statement | MOB | Mobile | 44 min |
| May 20, 8:09 PM CDT | Special Weather Statement | MOB | Baldwin, Mobile | 51 min |
| May 20, 8:12 PM CDT | Special Weather Statement | MOB | Baldwin | 48 min |
| May 20, 8:17 PM CDT | Special Marine Warning | MOB | 88 min | |
| May 20, 8:21 PM CDT | Severe Thunderstorm Warning | MOB | Mobile | 39 min |
| May 20, 8:25 PM CDT | Flash Flood Warning | MOB | Mobile | 6 hr |
| May 20, 9:02 PM CDT | Flash Flood Warning | MOB | Baldwin, Escambia | 6 hr |
| May 20, 9:07 PM CDT | Special Weather Statement | MOB | Baldwin, Escambia | 53 min |
| May 20, 9:23 PM CDT | Special Marine Warning | MOB | 52 min | |
| May 20, 9:26 PM CDT | Special Marine Warning | MOB | 2 hr | |
| May 20, 10:21 PM CDT | Areal Flood Advisory | MOB | Baldwin, Conecuh, Covington, Escambia | 3 hr |
| May 20, 10:25 PM CDT | Special Weather Statement | MOB | Covington | 65 min |
| May 20, 10:34 PM CDT | Special Marine Warning | MOB | 116 min | |
| May 20, 10:58 PM CDT | Severe Thunderstorm Warning | MOB | Covington | 47 min |
| May 20, 11:14 PM CDT | Areal Flood Advisory | MOB | Covington, Crenshaw | 3 hr |
| May 20, 11:40 PM CDT | Special Marine Warning | MOB | 2 hr | |
| May 20, 11:59 PM CDT | Areal Flood Warning | MOB | Baldwin, Clarke, Mobile, Washington | 12 hr |
| May 21, 12:18 AM CDT | Special Marine Warning | MOB | 57 min | |
| May 21, 1:30 AM CDT | Areal Flood Warning | MOB | Mobile | 12 hr |
| May 21, 1:55 AM CDT | Special Marine Warning | MOB | 95 min | |
| May 21, 3:21 PM CDT | Flash Flood Watch | MOB | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more | 47 hr |
| May 20, 10:17 PM CDT | Severe Thunderstorm Warning | MOB | Okaloosa | 43 min |
| May 20, 11:30 PM CDT | Flash Flood Warning | MOB | Okaloosa, Santa Rosa | 6 hr |
Nearby
Flash Flood Watches in Alabama, 2017Flash Flood Watches in Florida, 2017Every flash flood watch in 2017
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.