FLASH FLOOD warning for Bay and Saginaw Counties, Flash Flood Watch for Tri-Cities and Thumb - Severe Thunderstorm Warnings continue elsewhere

A very stormy afternoon continues with an ominous flash flood watch just issued moments ago for the Tri-Cities and thumb, which indicates continuing thunderstorm activity will cause the potential for flash flooding conditions throughout the evening:

Text of the watch is as follows:

...THUNDERSTORMS WILL CONTINUE TO PRODUCE TORRENTIAL RAINFALL
THROUGH TONIGHT...

MIZ047>049-053>055-060>063-069-070-040800-
/O.NEW.KDTX.FF.A.0003.150903T2037Z-150904T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-
LAPEER-ST. CLAIR-OAKLAND-MACOMB-
INCLUDING THE CITIES OF...MIDLAND...BAY CITY...BAD AXE...
SAGINAW...CARO...SANDUSKY...OWOSSO...FLINT...LAPEER...
PORT HURON...PONTIAC...WARREN
437 PM EDT THU SEP 3 2015

...FLASH FLOOD WATCH IN EFFECT UNTIL 4 AM EDT FRIDAY...

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* FLASH FLOOD WATCH FOR A PORTION OF SOUTHEAST MICHIGAN...
  INCLUDING THE FOLLOWING AREAS...BAY...GENESEE...HURON...
  LAPEER...MACOMB...MIDLAND...OAKLAND...SAGINAW...SANILAC...
  SHIAWASSEE...ST. CLAIR AND TUSCOLA.

* UNTIL 4 AM EDT FRIDAY

* ADDITIONAL ROUNDS OF HEAVY RAINFALL ARE EXPECTED TO DEVELOP
  TONIGHT AS AN UPPER LEVEL DISTURBANCE ALOFT STALLS OUT OVER THE
  REGION. RADAR ESTIMATES SUGGEST THAT RAINFALL AMOUNTS OF 2 TO 4
  INCHES HAS ALREADY FALLEN TODAY OVER PORTIONS OF THE TRI CITES
  REGION. LINGERING INSTABILITY AND A STALLED OUT FRONTAL AXIS
  WILL SUPPORT THUNDERSTORM DEVELPOMENT. ANY THUNDERSTORM ACTIVITY
  TONIGHT WILL BE CAPABLE OF PRODUCING TORRENTIAL RAINFALL...WITH
  RAINFALL RATES OF 1 TO 2 INCHES PER HOUR POSSIBLE.

* URBAN FLOODING...ESPECIALLY IN THE TRI CITIES AREA...WILL BE
  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.