Alert archive / Michigan / Flash Flood Warnings in 2011
Flash Flood Warning 8, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this flash flood warning at Jun 21, 2011, 7:03 PM EDT for Kent County, Michigan. It was in force for 3 hr. 3 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
- Jun 21, 2011, 7:03 PM EDT (23:03 UTC)
- Expired
- Jun 21, 2011, 10:06 PM EDT
- In force
- 3 hr
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Flood severity
- None
County Kent County, MI
The radar
The Grand Rapids radar (KGRR), 21 km from the middle of the area, began a volume at 23:05 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 21, 7:03 PM EDT | FLASH FLOOD | 1 Ene Grand Rapids, MI | 1 TO 2 FEET OF STANDING WATER AT THE INTERSECTION OF DIAMOND AVE AND MICHIGAN ST. ALSO AT INTERSECTION OF HOUSEMAN AND MICHIGAN. |
| Jun 21, 7:27 PM EDT | FLOOD | 2 Wsw Caledonia, MI | FIELDS ARE FLOODED NEAR 100TH STREET AND PATTERSON INTERSECTION. NEARBY STREAMS ARE OUT OF THEIR BANKS. |
| Jun 21, 8:00 PM EDT | FLOOD | Ese Lowell, MI | WATER OVER THE ROAD NEAR M-21 AND HUDSON. DEPTH OF WATER UNKNOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 11.1 hours before the alert went out and 173 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
- 874 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 504 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
934 WGUS53 KGRR 212303 FFWGRR MIC081-220500- /O.NEW.KGRR.FF.W.0008.110621T2303Z-110622T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE GRAND RAPIDS MI 703 PM EDT TUE JUN 21 2011 THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A * FLASH FLOOD WARNING FOR... KENT COUNTY IN SOUTHWEST MICHIGAN... * UNTIL 100 AM EDT WEDNESDAY * AT 658 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL MOVING ACROSS KENT COUNTY. RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE ESTIMATED TO HAVE FALLEN ALREADY BY RADAR. THE HEAVIEST RAIN AT 658 PM WAS MOVING ACROSS THE GRAND RAPIDS METRO AREA. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...GRAND RAPIDS...CEDAR SPRINGS...LOWELL...ROCKFORD...SPARTA...BOWNE CENTER...ELMDALE...GERALD R FORD ARPT...HARVARD...PARNELL AND STANDALE. 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. 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. && LAT...LON 4329 8531 4277 8531 4277 8578 4329 8579 $$ DUKE
1 follow-up statement
320 WGUS73 KGRR 220206 FFSGRR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1006 PM EDT TUE JUN 21 2011 MIC081-220217- /O.CAN.KGRR.FF.W.0008.000000T0000Z-110622T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KENT MI- 1006 PM EDT TUE JUN 21 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR KENT COUNTY IS CANCELLED... AT 955 PM EDT...KENT COUNTY LAW ENFORCEMENT INDICATED THAT THE SIGNIFICANT FLOODING THAT PROMPTED THE FLASH FLOODING WARNING EARLIER HAS IMPROVED SIGNIFICANTLY. MANY STORM DRAINS THAT WERE PLUGGED EARLIER AND CAUSED THE FLOODING HAVE BEEN UNPLUGGED. A URBAN AND SMALL STREAM FLOOD ADVISORY THAT WAS ISSUED EARLIER REMAINS IN EFFECT FOR KENT COUNTY. RIVER AND STREAM LEVELS ARE STILL RISING...AND SOME STANDING WATER REMAINS ON SOME OPEN FIELDS. EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. LAT...LON 4329 8531 4277 8531 4277 8578 4329 8579 $$ NJJ
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 5:39 AM EDT | Special Weather Statement | GRR | Newaygo | 81 min |
| Jun 21, 4:20 PM EDT | Special Weather Statement | GRR | Ottawa | 40 min |
| Jun 21, 4:31 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Ottawa | 59 min |
| Jun 21, 5:29 PM EDT | Areal Flood Advisory | GRR | Muskegon, Ottawa | 18 hr |
| Jun 21, 5:29 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Muskegon, Ottawa | 61 min |
| Jun 21, 5:39 PM EDT | Special Marine Warning | GRR | 2 hr | |
| Jun 21, 5:41 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Newaygo, Oceana | 64 min |
| Jun 21, 5:59 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Kent, Ottawa | 61 min |
| Jun 21, 6:03 PM EDT | Severe Thunderstorm Warning | GRR | Van Buren | 43 min |
| Jun 21, 6:14 PM EDT | Areal Flood Advisory | GRR | Allegan, Van Buren | 6 hr |
| Jun 21, 6:20 PM EDT | Flash Flood Warning | GRR | Ottawa | 17 hr |
| Jun 21, 6:25 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 50 min |
| Jun 21, 6:26 PM EDT | Tornado Warning | GRR | Allegan | 34 min |
| Jun 21, 6:28 PM EDT | Areal Flood Advisory | GRR | Kent | 17 hr |
| Jun 21, 6:37 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Kalamazoo | 83 min |
| Jun 21, 6:39 PM EDT | Areal Flood Advisory | GRR | Newaygo, Oceana | 17 hr |
| Jun 21, 6:44 PM EDT | Severe Thunderstorm Warning | GRR | Mecosta, Newaygo | 76 min |
| Jun 21, 6:59 PM EDT | Severe Thunderstorm Warning | GRR | Allegan | 46 min |
| Jun 21, 7:00 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 45 min |
| Jun 21, 7:21 PM EDT | Areal Flood Advisory | GRR | Calhoun | 4 hr |
| Jun 21, 7:25 PM EDT | Severe Thunderstorm Warning | GRR | Ionia, Montcalm | 65 min |
| Jun 21, 7:59 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella, Montcalm | 91 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.