Alert archive / Michigan / Flash Flood Warnings in 2012
Flash Flood Warning 6, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this flash flood warning at Jul 25, 2012, 9:49 PM EDT for Mason County, Michigan. It was in force for 11 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
- Jul 25, 2012, 9:49 PM EDT (01:49 UTC)
- Expired
- Jul 26, 2012, 9:03 AM EDT
- In force
- 11 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), 142 km from the middle of the area, began a volume at 01:52 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 |
|---|---|---|---|
| Jul 26, 8:58 AM EDT | HEAVY RAIN 2.5 | Ludington State Park, MI | OVERNIGHT TOTAL RAINFALL REPORTED FROM THE LUDINGTON STATE PARK. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.8 hours before the alert went out and 146 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
- 2643 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 1451 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 16.9
The text
As transmitted, in the capitals the NWS used until 2016.
358
WGUS53 KGRR 260149
FFWGRR
MIC105-261330-
/O.NEW.KGRR.FF.W.0006.120726T0149Z-120726T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
949 PM EDT WED JUL 25 2012
THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
MASON COUNTY IN WEST CENTRAL MICHIGAN...
* UNTIL 930 AM EDT THURSDAY
* AT 940 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL EXTENDING FROM
BIG SABLE POINT TO EAST OF FOUNTAIN. ADDITIONAL THUNDERSTORMS WITH
VERY HEAVY RAIN WILL SPREAD EAST ACROSS LAKE MICHIGAN INTO MASON
COUNTY BY 1030 PM EDT. FLASH FLOODING IS EXPECTED TO BEGIN BEFORE
MIDNIGHT ACROSS MUCH OF MASON COUNTY AS HEAVY RAIN CONTINUES.
* RUNOFF FROM 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 4409 8650 4412 8644 4418 8639 4417 8604
4382 8604 4382 8643 4382 8644 4397 8647
4403 8652 4406 8652
$$
TJT2 follow-up statements
962
WGUS73 KGRR 260350
FFSGRR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1150 PM EDT WED JUL 25 2012
MIC105-261330-
/O.CON.KGRR.FF.W.0006.000000T0000Z-120726T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MASON MI-
1150 PM EDT WED JUL 25 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR MASON COUNTY UNTIL 930
AM EDT THURSDAY...
AT 1137 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
ADDITIONAL THUNDERSTORMS MOVING EAST ACROSS LAKE MICHIGAN TOWARDS
MASON COUNTY. RADAR ESTIMATED PRECIPITATION AMOUNTS APPROACHING 3
INCHES HAD OCCURRED NEAR BIG SABLE POINT. TO THE NORTHEAST OF THIS
AREA...A SWATH OF ONE TO TWO INCHES EXTENDED NORTHEAST THROUGH
FREESOIL.
WITH CURRENT RAINFALL TOTALS THERE IS A LIMITED THREAT FOR FLASH
FLOODING...HOWEVER ADDITIONAL RAIN MOVING INTO MASON COUNTY FROM
LAKE MICHIGAN WILL INCREASE THE FLASH FLOOD THREAT ACROSS MASON
COUNTY THROUGH 1 AM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS.
&&
LAT...LON 4409 8650 4412 8644 4418 8639 4417 8604
4382 8604 4382 8643 4382 8644 4397 8647
4403 8652 4406 8652
$$
TJT064
WGUS73 KGRR 261303
FFSGRR
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
903 AM EDT THU JUL 26 2012
MIC105-261315-
/O.CAN.KGRR.FF.W.0006.000000T0000Z-120726T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MASON MI-
903 AM EDT THU JUL 26 2012
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR MASON COUNTY IS
CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA.
LUDINGTON STATE PARK RECEIVED 2.50 INCHES OF RAIN FROM STORMS LAST
NIGHT...BUT FLOODING IS NO LONGER BEING REPORTED ACROSS MASON
COUNTY. STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE
BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN
OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 4409 8650 4412 8644 4418 8639 4417 8604
4382 8604 4382 8643 4382 8644 4397 8647
4403 8652 4406 8652
$$
DUKEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 8:12 PM EDT | Special Weather Statement | GRR | Clare, Lake, Mason, Osceola | 63 min |
| Jul 25, 8:19 PM EDT | Special Marine Warning | GRR | 41 min | |
| Jul 25, 9:34 PM EDT | Severe Thunderstorm Warning | GRR | Clare, Osceola | 56 min |
| Jul 25, 9:40 PM EDT | Special Marine Warning | GRR | 95 min | |
| Jul 25, 9:44 PM EDT | Tornado Warning | GRR | Clare | 24 min |
| Jul 25, 9:50 PM EDT | Severe Thunderstorm Warning | GRR | Mason, Oceana | 70 min |
| Jul 25, 10:44 PM EDT | Severe Thunderstorm Warning | GRR | Clare, Osceola | 61 min |
| Jul 25, 10:56 PM EDT | Flash Flood Warning | GRR | Clare | 10 hr |
| Jul 25, 11:23 PM EDT | Special Weather Statement | GRR | Isabella, Montcalm | 67 min |
| Jul 25, 11:40 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella, Mecosta, Montcalm | 80 min |
| Jul 26, 12:30 AM EDT | Special Marine Warning | GRR | 2 hr | |
| Jul 26, 3:20 AM EDT | Special Marine Warning | GRR | 100 min | |
| Jul 26, 4:14 AM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Ottawa | 37 min |
Nearby
Flash Flood Warnings in Michigan, 2012Every 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.