Alert archive / Michigan / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 5, NWS Gaylord, MI

April 10, 2011Benzie County, Leelanau County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Apr 10, 2011, 6:24 PM EDT for Benzie County, Leelanau County, Michigan. It was in force for 44 min. 6 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: Apr 10, 2011, 6:24 PM EDT (22:24 UTC)
Expired: Apr 10, 2011, 7:08 PM EDT
In force: 44 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Benzie County, MI, Leelanau County, MI

The radar

The NCL Michigan radar (KAPX), 96 km from the middle of the area, began a volume at 22:28 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
Apr 10, 6:35 PM EDT	HAIL 0.88	2 W Maple City, MI
Apr 10, 6:37 PM EDT	HAIL 1	Empire, MI
Apr 10, 6:45 PM EDT	HAIL 0.7	10 Wnw Maple City, MI
Apr 10, 6:45 PM EDT	HAIL 0.7	1 N Maple City, MI
Apr 10, 6:45 PM EDT	HAIL 1	Maple City, MI
Apr 10, 6:47 PM EDT	HAIL 1	Maple City, MI

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
Apr 10, 6:20 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.4 hours before the alert went out and 177 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: 56 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 799 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

998 
WUUS53 KAPX 102224
SVRAPX
MIC019-089-102330-
/O.NEW.KAPX.SV.W.0005.110410T2224Z-110410T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
624 PM EDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BENZIE COUNTY IN NORTHERN LOWER MICHIGAN...
  LEELANAU COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 730 PM EDT

* AT 622 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  NORTHEAST OF FRANKFORT...AND MOVING NORTHEAST AT 80 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EMPIRE...LELAND...PLATTE TOWNSHIP...GLEN HAVEN...GLEN ARBOR...
  BURDICKVILLE...LAKE ANN...MAPLE CITY...CEDAR...FOUCH...BINGHAM...
  LAKE LEELANAU...SUTTONS BAY...NORTHPORT AND GOOD HARBOR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM EDT MONDAY MORNING FOR
NORTHERN LOWER MICHIGAN.

LAT...LON 4475 8610 4490 8608 4492 8603 4491 8600
      4498 8592 4495 8587 4496 8582 4506 8576
      4514 8561 4478 8565 4477 8581 4473 8581
      4463 8618 4471 8625
TIME...MOT...LOC 2224Z 240DEG 69KT 4475 8613
WIND...HAIL 60MPH 1.00IN

$$

3 follow-up statements

097 
WWUS34 KAPX 102245
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
645 PM EDT SUN APR 10 2011

MIC019-089-102330-
/O.CON.KAPX.SV.W.0005.000000T0000Z-110410T2330Z/
BENZIE MI-LEELANAU MI-
645 PM EDT SUN APR 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR LEELANAU AND
NORTHERN BENZIE COUNTIES UNTIL 730 PM EDT...

AT 634 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE 
THUNDERSTORM PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED 
NEAR BURDICKVILLE...OR NEAR EMPIRE...MOVING NORTHEAST AT 75 MPH.

THIS STORM IS ALSO CAPABLE OF PRODUCING WINDS IN EXCESS OF 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  LELAND...LAKE LEELANAU...SUTTONS BAY AND NORTHPORT.

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.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4475 8610 4490 8608 4492 8603 4491 8600
      4498 8592 4495 8587 4496 8582 4506 8576
      4514 8561 4478 8565 4477 8581 4473 8581
      4463 8618 4471 8625
TIME...MOT...LOC 2245Z 242DEG 65KT 4489 8572
WIND...HAIL 60MPH 1.00IN

$$

LAWRENCE

742 
WWUS34 KAPX 102256
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
656 PM EDT SUN APR 10 2011

MIC019-102306-
/O.CAN.KAPX.SV.W.0005.000000T0000Z-110410T2330Z/
BENZIE MI-
656 PM EDT SUN APR 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BENZIE COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4490 8608 4492 8603 4491 8600 4498 8592
      4495 8587 4496 8582 4506 8576 4514 8561
      4478 8565 4477 8581 4477 8609
TIME...MOT...LOC 2256Z 242DEG 65KT 4497 8546
WIND...HAIL <50MPH <.50IN

$$

MIC089-102330-
/O.CON.KAPX.SV.W.0005.000000T0000Z-110410T2330Z/
LEELANAU MI-
656 PM EDT SUN APR 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR LEELANAU
COUNTY UNTIL 730 PM EDT...

AT 651 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR MAPLETON...OR 9 MILES
WEST OF ELK RAPIDS...MOVING NORTHEAST AT 75 MPH.

LOCATIONS IMPACTED INCLUDE...

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.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4490 8608 4492 8603 4491 8600 4498 8592
      4495 8587 4496 8582 4506 8576 4514 8561
      4478 8565 4477 8581 4477 8609
TIME...MOT...LOC 2256Z 242DEG 65KT 4497 8546
WIND...HAIL 60MPH 1.00IN

$$

320 
WWUS34 KAPX 102308
SVSAPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
708 PM EDT SUN APR 10 2011

MIC089-102317-
/O.CAN.KAPX.SV.W.0005.000000T0000Z-110410T2330Z/
LEELANAU MI-
708 PM EDT SUN APR 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR LEELANAU COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE LATER THIS 
EVENING...AND A TORNADO WATCH REMAINS IN EFFECT UNTIL 2 AM EDT.

LAT...LON 4490 8608 4492 8603 4491 8600 4498 8592
      4495 8587 4496 8582 4506 8576 4514 8561
      4478 8565 4477 8581 4477 8609
TIME...MOT...LOC 2307Z 242DEG 65KT 4505 8520
WIND...HAIL <50MPH <.50IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 4:23 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Leelanau, Manistee, Wexford	22 min
Apr 10, 4:45 AM EDT	Severe Thunderstorm Warning	APX	Benzie, Grand Traverse, Kalkaska, Manistee, Wexford	32 min
Apr 10, 5:01 AM EDT	Special Marine Warning	APX		44 min
Apr 10, 5:56 AM EDT	Severe Thunderstorm Warning	APX	Antrim, Benzie, Grand Traverse, Kalkaska, Manistee, Wexford	49 min
Apr 10, 6:20 AM EDT	Severe Thunderstorm Warning	APX	Crawford, Kalkaska, Missaukee, Roscommon, Wexford	55 min
Apr 10, 7:34 AM EDT	Special Marine Warning	APX		86 min
Apr 10, 3:55 PM EDT	Gale Watch	APX		11 hr
Apr 10, 5:34 PM EDT	Special Marine Warning	APX		56 min
Apr 10, 6:51 PM EDT	Special Marine Warning	APX		24 min
Apr 10, 6:55 PM EDT	Severe Thunderstorm Warning	APX	Antrim, Charlevoix, Grand Traverse, Leelanau	22 min
Apr 10, 7:15 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Alpena, Montmorency	60 min
Apr 10, 7:27 PM EDT	Severe Thunderstorm Warning	APX	Crawford, Montmorency, Oscoda, Otsego	36 min
Apr 10, 7:54 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Oscoda	66 min
Apr 10, 7:56 PM EDT	Special Marine Warning	APX		109 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.