Alert archive / Michigan / Flash Flood Warnings in 2011
Flash Flood Warning 3, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this flash flood warning at May 11, 2011, 10:49 PM EDT for Mason County, Michigan. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 11, 2011, 10:49 PM EDT (02:49 UTC)
- Expired
- May 12, 2011, 5:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Flood severity
- None
County Mason County, MI
The radar
The Grand Rapids radar (KGRR), 143 km from the middle of the area, began a volume at 02:50 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.8 hours before the alert went out and 148 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
- 4 J/kg
- Mixed-layer CIN
- -277 J/kg
- Mixed-layer LCL
- 759 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.5
The text
As transmitted, in the capitals the NWS used until 2016.
910
WGUS53 KGRR 120249
FFWGRR
MIC105-120900-
/O.NEW.KGRR.FF.W.0003.110512T0249Z-110512T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1049 PM EDT WED MAY 11 2011
THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
MASON COUNTY IN WEST CENTRAL MICHIGAN...
* UNTIL 500 AM EDT THURSDAY
* AT 1046 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RAINFALL ESTIMATES OF OVER AN INCH AND HALF HAS
OCCURRED WITHIN THE PAST HOUR JUST NORTH OF LUDINGTON.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LUDINGTON...FREESOIL...MILLERTON...TALLMAN AND WILEY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
&&
LAT...LON 4417 8604 4382 8604 4382 8643 4389 8645
4397 8646 4404 8652 4406 8652 4408 8650
4412 8643 4418 8639 4418 8637
$$
JK2 follow-up statements
822
WGUS73 KGRR 120507
FFSGRR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
107 AM EDT THU MAY 12 2011
MIC105-120900-
/O.CON.KGRR.FF.W.0003.000000T0000Z-110512T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MASON MI-
107 AM EDT THU MAY 12 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR MASON COUNTY UNTIL 500
AM EDT...
AT 1253 AM EDT...THE HEAVY RAINFALL HAD ENDED ON ONLY LIGHT RAIN
CONTINUED TO FALL. GIVEN RADAR ESTIMATED RAINFALL FROM THIS
EVENING'S THUNDERSTORM RAINFALL EXCEEDED 5 INCHES OVER THE NORTHEAST
SECTIONS OF THE COUNTY AND IT CURRENTLY NIGHTTIME...MEANING IT IS
HARD TO GET REPORTS OF FLOOD DAMAGE FROM REMOTE AREA... THE WARNING
WILL CONTINUE UNTIL 5 AM.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LUDINGTON...FREESOIL...MILLERTON...TALLMAN AND WILEY.
LOCAL LAW ENFORCEMENT OFFICIALS REPORTED AROUND 1030 PM THIS EVENING
EAST OF SCOTTVILLE WATER WAS REPORTED TO BE OVER THE ROAD. ALSO
AROUND THE SAME TIME THERE WATER WAS REPORTED OVER SOME ROADS IN
DOWN TOWN LUDINGTON. THIS RAINFALL WAS FROM HEAVY RAINFALL DUE TO
THUNDERSTORMS THIS EVENING. RAINFALL REPORT OF AROUND ONE AND A HALF
INCHES WERE RECEIVED FROM LUDINGTON. THE RADAR ESTIMATED RAINFALL
AMOUNTS OF OVER 5 INCHES IN EXTREME NORTHEAST SECTIONS OF THE
COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 4417 8604 4382 8604 4382 8643 4389 8645
4397 8646 4404 8652 4406 8652 4408 8650
4412 8643 4418 8639 4418 8637
$$
WDM728
WGUS73 KGRR 120855
FFSGRR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
455 AM EDT THU MAY 12 2011
MIC105-120906-
/O.EXP.KGRR.FF.W.0003.000000T0000Z-110512T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MASON MI-
455 AM EDT THU MAY 12 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR MASON COUNTY WILL
BE ALLOWED TO EXPIRE AT 500 AM EDT...
EXCESS RUNOFF FROM HEAVY RAIN CONTINUES BUT NO SIGNIFICANT ISSUES
WERE REPORTED. THE WARNING IS BEING DOWNGRADED TO AN ADVISORY. NO
ADDITIONAL HEAVY RAINFALL IS FORECASTED FOR THIS MORNING.
ADDITIONAL STORMS WITH SOME HEAVY RAIN WILL BE POSSIBLE LATER TODAY
AND TONIGHT.
IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW
ENFORCEMENT AGENCY.
LAT...LON 4417 8604 4382 8604 4382 8643 4389 8645
4397 8646 4404 8652 4406 8652 4408 8650
4412 8643 4418 8639 4418 8637
$$
MJSThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 8:14 PM EDT | Special Weather Statement | GRR | Lake, Mason, Osceola | 61 min |
| May 11, 8:46 PM EDT | Special Weather Statement | GRR | Van Buren | 44 min |
| May 11, 9:01 PM EDT | Areal Flood Advisory | GRR | Lake, Mason, Osceola | 14 hr |
| May 11, 9:21 PM EDT | Special Weather Statement | GRR | Clare, Osceola | 84 min |
| May 11, 9:30 PM EDT | Special Weather Statement | GRR | Allegan, Barry, Calhoun, Kalamazoo, Kent, Lake and 5 more | 90 min |
| May 11, 9:44 PM EDT | Special Marine Warning | GRR | 91 min | |
| May 11, 10:08 PM EDT | Special Marine Warning | GRR | 52 min | |
| May 11, 10:08 PM EDT | Severe Thunderstorm Warning | GRR | Ottawa | 47 min |
| May 11, 10:30 PM EDT | Severe Thunderstorm Warning | GRR | Allegan | 39 min |
| May 11, 10:34 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Kent | 57 min |
| May 11, 10:48 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Calhoun, Kalamazoo | 71 min |
| May 11, 11:13 PM EDT | Special Weather Statement | GRR | Barry, Calhoun, Clare, Clinton, Eaton, Gratiot and 9 more | 92 min |
| May 11, 11:14 PM EDT | Special Marine Warning | GRR | 57 min | |
| May 12, 12:23 AM EDT | Special Weather Statement | GRR | Ingham, Jackson | 67 min |
| May 12, 3:59 PM EDT | Special Weather Statement | GRR | Kent | 61 min |
| May 12, 4:01 PM EDT | Special Weather Statement | GRR | Barry | 59 min |
| May 12, 4:39 PM EDT | Severe Thunderstorm Warning | GRR | Barry | 45 min |
| May 12, 5:09 PM EDT | Special Weather Statement | GRR | Kent | 66 min |
| May 12, 5:33 PM EDT | Special Weather Statement | GRR | Kent | 57 min |
| May 12, 5:41 PM EDT | Severe Thunderstorm Warning | GRR | Allegan | 33 min |
| May 12, 6:13 PM EDT | Special Weather Statement | GRR | Kent | 62 min |
| May 12, 6:16 PM EDT | Special Weather Statement | GRR | Barry | 59 min |
| May 12, 6:25 PM EDT | Areal Flood Advisory | GRR | Allegan, Barry | 3 hr |
| May 12, 7:27 PM EDT | Special Weather Statement | GRR | Barry, Eaton | 63 min |
| May 12, 7:54 PM EDT | Special Weather Statement | GRR | Eaton | 51 min |
Nearby
Flash Flood Warnings in Michigan, 2011Every flash flood warning in 2011
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.