Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 2, NWS Huntsville, AL

January 11, 2012Madison County, Marshall County, Morgan County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jan 11, 2012, 9:47 AM CST for Madison County, Marshall County, Morgan County, Alabama. It was in force for 3 hr. 9 reports 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: Jan 11, 2012, 9:47 AM CST (15:47 UTC)
Expired: Jan 11, 2012, 1:00 PM CST
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

Counties Madison County, AL, Marshall County, AL, Morgan County, AL

What was reported inside it

Time	Report	Where	Remark
Jan 11, 9:51 AM CST	HEAVY RAIN 0	4 W Huntsville, AL	TWO TO THREE INCHES OF WATER REPORTED COVERING THE ROAD WEST OF CLIFF MANOR ON GOVERNORS DRIVE.
Jan 11, 9:56 AM CST	FLASH FLOOD	2 Ne Huntsville, AL	SIX TO SEVEN INCHES OF STANDING WATER REPORTED AT THE FIVE POINTS AREA.
Jan 11, 10:20 AM CST	FLASH FLOOD	1 Sse Huntsville, AL	WATER WAS MOVING INTO HOMES ALONG BOB WALLACE AVENUE AND POINCIANA STREET.
Jan 11, 10:20 AM CST	FLASH FLOOD	2 Ese Huntsville, AL	WATER ENTERING A BASEMENT AT 1906 FAIRMONT RD SE.
Jan 11, 10:20 AM CST	FLASH FLOOD	2 S Huntsville, AL	DRAKE AVENUE AND DUPREE DRIVE SW ROAD BEING BLOCKED OFF DUE TO HIGH WATER.
Jan 11, 10:38 AM CST	FLASH FLOOD	2 Ne Huntsville, AL	OAKWOOD AVENUE AND GILES DRIVE NE CLOSED
Jan 11, 10:38 AM CST	FLASH FLOOD	2 Ne Huntsville, AL	OAKWOOOD AVENUE AND MAYSVILLE ROAD CLOSED.
Jan 11, 10:49 AM CST	FLASH FLOOD	2 Sse Huntsville, AL	FOUR FEET OF WATER REPORTED IN A HOME ON SOUTH HALL DRIVE BY FIRE DEPARTMENT.
Jan 11, 10:49 AM CST	FLASH FLOOD	4 Sse Moores Mill, AL	AUTOMOBILE STRANDED IN WATER ON KIMBERLY LOU BLVD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 3.8 hours before the alert went out and 157 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: 66 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 468 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

494 
WGUS54 KHUN 111547
FFWHUN
ALC089-095-103-111900-
/O.NEW.KHUN.FF.W.0002.120111T1547Z-120111T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
947 AM CST WED JAN 11 2012

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN MORGAN COUNTY IN NORTH CENTRAL ALABAMA...
  MADISON COUNTY IN NORTH CENTRAL ALABAMA...
  WEST CENTRAL MARSHALL COUNTY IN NORTHEAST ALABAMA...

* UNTIL 100 PM CST

* AT 947 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. RAINFALL RATES OF 1 TO 3 INCHES PER HOUR WILL FALL ON 
  ALREADY SATURATED GROUND PRODUCING FLASH FLOODING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  HUNTSVILLE...MADISON...MERIDIANVILLE...MOORES MILL...REDSTONE
  ARSENAL...ALABAMA A AND M UNIVERSITY...GURLEY...HARVEST...HAZEL
  GREEN...MORGAN CITY...NEW HOPE...NEW MARKET...OWENS CROSSROADS...
  RYLAND...TRIANA AND UNIVERSITY OF ALABAMA IN HUNTSVILLE.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3490 8633 3487 8635 3485 8633 3482 8634
      3475 8634 3474 8636 3452 8636 3431 8655
      3431 8682 3455 8680 3458 8679 3499 8678
      3498 8632

$$

KULA

1 follow-up statement

866 
WGUS74 KHUN 111725
FFSHUN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1125 AM CST WED JAN 11 2012

ALC089-095-103-111900-
/O.CON.KHUN.FF.W.0002.000000T0000Z-120111T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON AL-MARSHALL AL-MORGAN AL-
1125 AM CST WED JAN 11 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN MORGAN...WEST
CENTRAL MARSHALL AND MADISON COUNTIES UNTIL 100 PM CST...

AT 1117 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN 
AREA OF HEAVY RAINFALL ACROSS EASTERN MORGAN...CENTRAL MARSHALL... 
AND MADISON COUNTIES. ADDITIONAL RAINFALL AMOUNTS UP TO 1 INCH ARE 
LIKELY.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO 
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING 
INCLUDE...HUNTSVILLE...MADISON...MERIDIANVILLE...MOORES 
MILL...REDSTONE ARSENAL...ALABAMA A AND M UNIVERSITY... 
GURLEY...HARVEST...HAZEL GREEN...MORGAN CITY...NEW HOPE...NEW 
MARKET...OWENS CROSSROADS...TRIANA AND UNIVERSITY OF ALABAMA IN 
HUNTSVILLE.

EMERGENCY MANAGEMENT OFFICIALS HAVE REPORTED FLASH FLOODING IN  
DOWNTOWN HUNTSVILLE WHERE WATER WAS COVERING ROADWAYS...ESPECIALLY 
NEAR THE INTERSECTION OF DRAKE AVENUE AND DUPREE DRIVE.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY.

EXCESSIVE RUNOFF FROM THIS AREA OF RAINFALL WILL CAUSE FLOODING OF 
SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. 
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF 
CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE ALSO SUBJECT TO 
FLOODING.

&&

LAT...LON 3490 8633 3487 8635 3485 8633 3482 8634
      3475 8634 3474 8636 3452 8636 3431 8655
      3431 8682 3455 8680 3458 8679 3499 8678
      3498 8632

$$

SL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 11, 2:38 AM CST	Special Weather Statement	HUN	Marshall	37 min
Jan 11, 4:35 AM CST	Flash Flood Warning	HUN	Madison	3 hr
Jan 11, 4:46 AM CST	Special Weather Statement	HUN	Limestone	44 min
Jan 11, 5:09 AM CST	Special Weather Statement	HUN	Marshall	51 min
Jan 11, 7:22 AM CST	Special Weather Statement	HUN	Cullman	38 min
Jan 11, 7:29 AM CST	Special Weather Statement	HUN	Jackson	46 min
Jan 11, 7:30 AM CST	Areal Flood Warning	HUN	Madison	3 hr
Jan 11, 8:05 AM CST	Special Weather Statement	HUN	Madison	40 min
Jan 11, 8:24 AM CST	Special Weather Statement	HUN	Morgan	51 min
Jan 11, 8:25 AM CST	Special Weather Statement	HUN	Morgan	50 min
Jan 11, 8:27 AM CST	Special Weather Statement	HUN	Morgan	48 min
Jan 11, 8:49 AM CST	Special Weather Statement	HUN	Madison	41 min
Jan 11, 9:14 AM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison	37 min
Jan 11, 9:27 AM CST	Special Weather Statement	HUN	Madison	48 min
Jan 11, 9:28 AM CST	Special Weather Statement	HUN	Marshall	47 min
Jan 11, 9:54 AM CST	Special Weather Statement	HUN	Madison	51 min
Jan 11, 9:58 AM CST	Flash Flood Warning	HUN	Lawrence, Limestone, Madison, Morgan	3 hr
Jan 11, 10:11 AM CST	Special Weather Statement	HUN	Jackson	49 min
Jan 11, 10:42 AM CST	River Flood Warning	HUN	Madison	42 hr
Jan 11, 1:04 PM CST	Areal Flood Warning	HUN	Lawrence, Limestone, Madison, Marshall, Morgan	4 hr
Jan 11, 5:07 PM CST	Areal Flood Warning	HUN	Madison	9 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.