Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 21, NWS Detroit, MI

May 29, 2011Monroe County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at May 29, 2011, 5:18 PM EDT for Monroe County, Michigan. It was in force for 87 min. 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: May 29, 2011, 5:18 PM EDT (21:18 UTC)
Expired: May 29, 2011, 6:45 PM EDT
In force: 87 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 70.0 mph

County Monroe County, MI

The radar

The Detroit radar (KDTX), 87 km from the middle of the area, began a volume at 21:21 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
May 29, 5:41 PM EDT	TSTM WND DMG	Temperance, MI	MULTIPLE 3 INCH BRANCHES DOWN, HEAVY RAIN.
May 29, 5:46 PM EDT	TSTM WND GST 60	Ida, MI	MULTIPLE LARGE LIMBS DOWN.
May 29, 5:57 PM EDT	TSTM WND DMG	4 Wnw Samaria, MI	8 TO 12 INCH DIAMETER TREES DOWN, ROAD CLOSED

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 29, 1:29 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.3 hours before the alert went out and 89 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: 12 J/kg
Mixed-layer CIN: -294 J/kg
Mixed-layer LCL: 499 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 298 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

672 
WUUS53 KDTX 292118
SVRDTX
MIC115-292245-
/O.NEW.KDTX.SV.W.0021.110529T2118Z-110529T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
518 PM EDT SUN MAY 29 2011

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MONROE COUNTY IN SOUTHEAST MICHIGAN...

* UNTIL 645 PM EDT

* AT 517 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS
  LOCATED 6 MILES NORTHEAST OF MORENCI...AND MOVING EAST AT 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OTTAWA LAKE AROUND 535 PM EDT.
  PETERSBURG AND LAMBERTVILLE AROUND 540 PM EDT.
  SAMARIA AND IDA AROUND 545 PM EDT.
  LA SALLE AND TOLEDO BEACH AROUND 550 PM EDT.
  BOLLES HARBOR AND MONROE AROUND 555 PM EDT.
  STONY POINT AND NEWPORT AROUND 600 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  TEMPERANCE...         PETERSBURG...         OTTAWA LAKE...
  MONROE...             MAYBEE...             LUNA PIER...
  LAMBERTVILLE...       IDA...                DUNDEE...
  CARLETON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4208 8376 4210 8333 4207 8325 4204 8321
      4203 8316 4199 8319 4196 8325 4191 8327
      4193 8331 4188 8333 4185 8339 4180 8340
      4179 8344 4175 8342 4173 8345 4172 8376
TIME...MOT...LOC 2118Z 256DEG 54KT 4177 8409
WIND...HAIL 70MPH 1.50IN

$$

SF/AD

1 follow-up statement

534 
WWUS53 KDTX 292130
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
530 PM EDT SUN MAY 29 2011

MIC115-292245-
/O.CON.KDTX.SV.W.0021.000000T0000Z-110529T2245Z/
MONROE MI-
530 PM EDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MONROE COUNTY
UNTIL 645 PM EDT...

AT 529 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL...
AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED
NEAR BLISSFIELD...MOVING EAST AT 65 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  OTTAWA LAKE AND PETERSBURG AROUND 535 PM EDT.
  LAMBERTVILLE AROUND 540 PM EDT.
  SAMARIA AND ERIE AROUND 545 PM EDT.
  TOLEDO BEACH AND LUNA PIER AROUND 550 PM EDT.
  BOLLES HARBOR AND MONROE AROUND 555 PM EDT.
  STONY POINT AROUND 600 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  TEMPERANCE...         PETERSBURG...         OTTAWA LAKE...
  MONROE...             MAYBEE...             LUNA PIER...
  LAMBERTVILLE...       IDA...                DUNDEE...
  CARLETON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4208 8376 4210 8333 4207 8325 4204 8321
      4203 8316 4199 8319 4196 8325 4191 8327
      4193 8331 4188 8333 4185 8339 4180 8340
      4179 8344 4175 8342 4173 8345 4172 8376
TIME...MOT...LOC 2130Z 263DEG 55KT 4180 8384
WIND...HAIL 70MPH 1.50IN

$$

SF/AD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 11:26 AM EDT	Flood Watch	DTX	Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe and 5 more	8 hr
May 29, 4:41 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	69 min
May 29, 4:55 PM EDT	Tornado Warning	DTX	Lenawee	56 min
May 29, 5:02 PM EDT	Tornado Warning	DTX	Livingston, Washtenaw	53 min
May 29, 5:04 PM EDT	Special Marine Warning	DTX		71 min
May 29, 5:22 PM EDT	Tornado Warning	DTX	Genesee, Shiawassee	83 min
May 29, 5:28 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	77 min
May 29, 5:30 PM EDT	Special Marine Warning	DTX		75 min
May 29, 5:36 PM EDT	Tornado Warning	DTX	Monroe	45 min
May 29, 5:46 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	34 min
May 29, 5:47 PM EDT	Tornado Warning	DTX	Oakland	42 min
May 29, 5:55 PM EDT	Flash Flood Warning	DTX	Shiawassee	2 hr
May 29, 5:57 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	78 min
May 29, 6:13 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	36 min
May 29, 6:16 PM EDT	Special Marine Warning	DTX		66 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2011 Every severe thunderstorm 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.