Alert archive / Michigan / Flash Flood Warnings in 2011
Flash Flood Warning 2, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this flash flood warning at May 11, 2011, 2:58 PM EDT for Osceola County, Michigan. It was in force for 3 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, 2:58 PM EDT (18:58 UTC)
- Expired
- May 11, 2011, 5:32 PM EDT
- In force
- 3 hr
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Flood severity
- None
County Osceola County, MI
The radar
The NCL Michigan radar (KAPX), 100 km from the middle of the area, began a volume at 19:00 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
Detroit, MI (KDTX), launched 12:00Z, 7.0 hours before the alert went out and 213 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1340 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
657 WGUS53 KGRR 111858 FFWGRR MIC133-120100- /O.NEW.KGRR.FF.W.0002.110511T1858Z-110512T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE GRAND RAPIDS MI 258 PM EDT WED MAY 11 2011 THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN OSCEOLA COUNTY IN CENTRAL MICHIGAN... * UNTIL 900 PM EDT * AT 255 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATES THAT 3 TO 4 INCHES OF RAIN HAS FALLEN ACROSS THE NORTHERN PORTION OF OSCEOLA COUNTY. ADDITIONAL STORMS OVER THE AREA WILL PRODUCE RAINFALL RATES OF 1 TO 2 INCHES PER HOUR OVER THE NEXT HOUR OR SO. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... TUSTIN...INA...PARK LAKE AND PISGAH HEIGHTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. && LAT...LON 4416 8508 4399 8509 4399 8556 4417 8556 $$ NJJ
1 follow-up statement
038 WGUS73 KGRR 112132 FFSGRR FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 532 PM EDT WED MAY 11 2011 MIC133-112145- /O.CAN.KGRR.FF.W.0002.000000T0000Z-110512T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ OSCEOLA MI- 532 PM EDT WED MAY 11 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN OSCEOLA COUNTY IS CANCELLED... COUNTY LAW ENFORCEMENT INDICATES THAT NO FLOODING HAS BEEN REPORTED...THUS THE FLASH FLOOD WARNING HAS BEEN CANCELLED. LAT...LON 4416 8508 4399 8509 4399 8556 4417 8556 $$ NJJ
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 9:04 AM EDT | Special Marine Warning | GRR | 74 min | |
| May 11, 9:22 AM EDT | Severe Thunderstorm Warning | GRR | Mason | 38 min |
| May 11, 9:52 AM EDT | Severe Thunderstorm Warning | GRR | Lake, Mason, Newaygo, Oceana | 38 min |
| May 11, 10:02 AM EDT | Special Marine Warning | GRR | 53 min | |
| May 11, 10:22 AM EDT | Areal Flood Advisory | GRR | Lake, Mason, Oceana | 6 hr |
| May 11, 11:06 AM EDT | Flash Flood Warning | GRR | Lake | 5 hr |
| May 11, 12:09 PM EDT | Severe Thunderstorm Warning | GRR | Lake, Mason | 51 min |
| May 11, 2:53 PM EDT | Severe Thunderstorm Warning | GRR | Clare, Osceola | 51 min |
| May 11, 7:14 PM EDT | Special Weather Statement | GRR | Lake, Mason | 61 min |
| May 11, 7:52 PM EDT | Special Marine Warning | GRR | 113 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.