Alert archive / Alabama / Flash Flood Warnings in 2017
Flash Flood Warning 15, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at May 20, 2017, 8:25 PM CDT for Mobile County, Alabama. It was in force for 6 hr. 1 report 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
- May 20, 2017, 8:25 PM CDT (01:25 UTC)
- Expired
- May 21, 2017, 2:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Mobile County, AL
The radar
The Mobile radar (KMOB), 16 km from the middle of the area, began a volume at 01:26 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 |
|---|---|---|---|
| May 20, 8:50 PM CDT | FLASH FLOOD | Nnw Airport And Univers, AL | STREET FLOODING ON AIRPORT BLVD EASTBOUND NEAR AIRPORT AND UNIVERSITY BLVD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 1.4 hours before the alert went out and 142 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.
394 WGUS54 KMOB 210125 FFWMOB ALC097-210730- /O.NEW.KMOB.FF.W.0015.170521T0125Z-170521T0730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Mobile AL 825 PM CDT SAT MAY 20 2017 The National Weather Service in Mobile has issued a * Flash Flood Warning for... Southwestern Mobile County in southwestern Alabama... * Until 230 AM CDT Sunday * At 824 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to two inches of rain have already fallen and additional heavy rainfall may lead to flash flooding over the warned area. * Some locations that will experience flooding include... Midtown Mobile, Downtown Mobile, Tillmans Corner, Theodore, Grand Bay, Mobile Regional Airport and I10 And I65. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 3042 8840 3071 8841 3070 8800 3045 8806 $$
1 follow-up statement
304 WGUS74 KMOB 210257 FFSMOB Flash Flood Statement National Weather Service Mobile AL 957 PM CDT SAT MAY 20 2017 ALC097-210730- /O.CON.KMOB.FF.W.0015.000000T0000Z-170521T0730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Mobile AL- 957 PM CDT SAT MAY 20 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM CDT FOR SOUTHWESTERN MOBILE COUNTY... At 850 PM CDT, flooding was reported on the eastbound lane of Airport Boulevard near the intersection with University Boulevard. At 946 PM CDT, Doppler radar indicated that heavier rains were moving south and east of the warned area. However, radar estimates that 2 to 4 inches of rain with locally higher amounts have fallen in the warned area this evening, and flash flooding will continue to impact some locations. Some locations that will continue to experience flooding include... Midtown Mobile, Downtown Mobile, Tillmans Corner, Theodore, Grand Bay, Mobile Regional Airport and I10 And I65. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 3042 8840 3071 8841 3070 8800 3045 8806 $$
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, 8:56 PM CDT | Flash Flood Watch | MOB | Baldwin, Escambia, Mobile | 7 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 |
Nearby
Flash Flood Warnings in Alabama, 2017Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.