Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 19, NWS Mobile, AL

June 9, 2012Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Jun 9, 2012, 2:15 PM CDT for Mobile County, Alabama. It was in force for 4 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: Jun 9, 2012, 2:15 PM CDT (19:15 UTC)
Expired: Jun 9, 2012, 6:00 PM CDT
In force: 4 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Mobile County, AL

The radar

The Mobile radar (KMOB), 31 km from the middle of the area, began a volume at 19:19 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
Jun 9, 3:31 PM CDT	HEAVY RAIN 15.62	5 S Mobile Airport, AL	NWS EMPLOYEE HAS MEASURED A 2 DAY STORM TOTAL OF 15.62 INCHES AS OF 3 PM.

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 12:00Z, 7.3 hours before the alert went out and 144 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: 1279 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 503 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

169 
WGUS54 KMOB 091915
FFWMOB
ALC097-092315-
/O.NEW.KMOB.FF.W.0019.120609T1915Z-120609T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
215 PM CDT SAT JUN 9 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 615 PM CDT

* AT 215 PM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH
  FLOODING OVER THE WARNED AREA AND RADAR ESTIMATES SHOWING
  WIDESPREAD TOTAL RAINFALL 4 TO 8 INCHES HAD FALLEN ACROSS THE
  MOBILE METRO AREA WITH LOCALIZED RAINFALL AMOUNTS OF UP TO 18
  INCHES CENTERED JUST NORTH OF I-10 BETWEEN DAWES AND ST ELMO.

* LOCAL LAW ENFORCEMENT AND FIRST RESPONDERS ARE CONDUCTING NUMEROUS
  WATER RESCUES ACROSS PORTIONS OF THE WARNED AREA...ESPECIALLY
  DOWNSTREAM OF A FAILED DAM OF A 14 ACRE PRIVATE LAKE NEAR DAWES
  LAKE ROAD AND NUGGET DRIVE...STRANDING PEOPLE IN THEIR HOMES.

* LOCATIONS IMPACTED INCLUDE...
  EASTERN DAUPHIN ISLAND...                  
  CENTRAL DAUPHIN ISLAND...                   DOWNTOWN MOBILE...
  MIDTOWN MOBILE...     WEST MOBILE...        CODEN...
  TILLMANS CORNER...    THEODORE...           TANNER WILLIAMS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A VERY DANGEROUS AND LIFE THREATENING FLOODING SITUATION. YOU
SHOULD NOT ATTEMPT TO TRAVEL. STAY HOME UNLESS YOU ARE FORCED TO
EVACUATE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR OCCURRING. SEEK
HIGHER GROUND IMMEDIATELY. DO NOT DRIVE OR WALK INTO AREAS WHERE
WATER CROSSES A ROAD. TURN AROUND - DON'T DROWN!

RESIDENTS LIVING AND CAMPERS RECREATING ALONG SMALL CREEKS CAN EXPECT
RAPID RISES AND SUBSEQUENT FLOODING. SEEK HIGHER GROUND IMMEDIATELY.

NEVER TRY TO CROSS OR PLAY IN AN URBAN SPILLWAY OR FLOWING CREEK...
EVEN A SMALL ONE. URBAN FLASH FLOODING IS A MAJOR KILLER.

&&

LAT...LON 3030 8820 3032 8820 3032 8823 3032 8820
      3035 8820 3037 8825 3036 8825 3038 8829
      3036 8832 3039 8833 3038 8839 3066 8842
      3079 8800 3051 8809 3037 8810 3031 8813
      3029 8812 3032 8816 3031 8820 3023 8827

$$

PURDY

1 follow-up statement

978 
WGUS74 KMOB 092300
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
600 PM CDT SAT JUN 9 2012

ALC097-092307-
/O.CAN.KMOB.FF.W.0019.000000T0000Z-120609T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOBILE AL-
600 PM CDT SAT JUN 9 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN MOBILE
COUNTY...

AT 553 PM CDT...THE HEAVY RAINFALL THAT PROMPTED THE WARNING FOR
SOUTHERN MOBILE COUNTY HAS ENDED...THUS THE FLASH FLOOD WARNING HAS 
BEEN CANCELLED. WHILE THE THREAT OF RAPIDLY RISING WATER HAS     
DECREASED SINCE THE HEAVY RAIN HAS TEMPORARILY ENDED...FLOODING OF 
ROADS...LOW LYING AND POOR DRAINAGE AREAS WILL CONTINUE AS LOCAL 
CREEKS AND STREAMS CONTINUE TO RISE OR CREST. THEREFORE...AN AREAL 
FLOOD WARNING HAS BEEN ISSUED UNTIL 545 AM. THE THREAT FOR FLASH 
FLOODING WILL INCREASE AGAIN LATE TONIGHT INTO SUNDAY MORNING AS 
ADDITIONAL HEAVY RAINFALL MOVES INTO THE AREA. FLASH FLOOD WARNINGS 
WILL BE ISSUED AS NECESSARY FOR EXPECTED RAPID WATER RISES. 

LAT...LON 3030 8820 3032 8820 3032 8823 3032 8820
      3035 8820 3037 8825 3036 8825 3038 8829
      3036 8832 3039 8833 3038 8839 3066 8842
      3079 8800 3051 8809 3037 8810 3031 8813
      3029 8812 3032 8816 3031 8820 3023 8827

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 8, 7:56 PM CDT	Rip Current Statement	MOB		23 hr
Jun 8, 11:51 PM CDT	Areal Flood Advisory	MOB	Mobile	114 min
Jun 9, 7:28 AM CDT	Areal Flood Advisory	MOB	Mobile	3 hr
Jun 9, 8:31 AM CDT	Flash Flood Warning Emergency	MOB	Mobile	6 hr
Jun 9, 12:11 PM CDT	Special Marine Warning	MOB		34 min
Jun 9, 12:15 PM CDT	Areal Flood Advisory	MOB	Baldwin	2 hr
Jun 9, 1:01 PM CDT	Special Marine Warning	MOB		44 min
Jun 9, 1:16 PM CDT	Flash Flood Warning	MOB	Baldwin	4 hr
Jun 9, 3:09 PM CDT	Flash Flood Watch	MOB		37 hr
Jun 9, 4:33 PM CDT	Areal Flood Advisory	MOB	Conecuh, Covington, Escambia	117 min
Jun 9, 5:04 PM CDT	Areal Flood Warning	MOB	Baldwin	12 hr
Jun 9, 5:56 PM CDT	Areal Flood Warning	MOB	Mobile	12 hr

Nearby

Flash Flood Warnings in Alabama, 2012 Every flash flood 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.