Alert archive / Michigan / Flash Flood Warnings in 2010

Flash Flood Warning 1, NWS Marquette, MI

May 25, 2010Ontonagon County, Michigan

NWS Marquette, MI issued this flash flood warning at May 25, 2010, 5:12 PM EDT for Ontonagon 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 counties it named.

The facts

Issued: May 25, 2010, 5:12 PM EDT (21:12 UTC)
Expired: May 25, 2010, 8:00 PM EDT
In force: 3 hr
Issued by: NWS Marquette, MI
Area: Storm-based polygon
Flood severity: None

County Ontonagon County, MI

The radar

The Marquette radar (KMQT), 137 km from the middle of the area, began a volume at 21:14 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

Minneapolis, MN (KMPX), launched 12:00Z, 9.2 hours before the alert went out and 396 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2163 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -80 m²/s²
0-3 km storm-relative helicity: -93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Marquette, MI wrote its last area forecast discussion before this flash flood warning went out at May 25, 4:50 PM EDT, 22 minutes earlier.

Area forecast discussion, May 25, 4:50 PM EDT, 22 minutes before

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Hazardous weather outlook, May 25, 4:43 PM EDT, 29 minutes before

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In the hours before

Special weather statement, May 25, 2:40 PM EDT, 2 hours 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MARQUETTE MI
240 PM EDT TUE MAY 25 2010

MIZ002-251915-
ONTONAGON-
240 PM EDT TUE MAY 25 2010

...SIGNIFICANT WEATHER ALERT FOR ONTONAGON COUNTY UNTIL 315 PM EDT...

AT 238 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 15 MILES SOUTHWEST
OF REDRIDGE TO 7 MILES NORTHEAST OF ONTONAGON TO 9 MILES EAST OF
BERGLAND. THESE STORMS WERE MOVING NORTHWEST AT 20 MPH.

PEA SIZE HAIL...WINDS UP TO 40 MPH...AND HEAVY DOWNPOURS ARE EXPECTED
WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  NORWICH...
  ONTONAGON...
  SILVER CITY...

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

SRF

The office that day

Everything else NWS Marquette, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 3:13 PM EDT	Special Marine Warning	MQT		47 min
May 25, 3:20 PM EDT	Severe Thunderstorm Warning	MQT	Ontonagon	55 min
May 25, 3:40 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	52 min
May 25, 4:00 PM EDT	Special Marine Warning	MQT		60 min
May 25, 4:15 PM EDT	Special Marine Warning	MQT		60 min
May 25, 4:25 PM EDT	Severe Thunderstorm Warning	MQT	Gogebic, Ontonagon	35 min
May 25, 4:59 PM EDT	Severe Thunderstorm Warning	MQT	Ontonagon	46 min
May 25, 5:00 PM EDT	Special Marine Warning	MQT		90 min

Nearby

Flash Flood Warnings in Michigan, 2010 Every flash flood warning in 2010

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.