Alert archive / Michigan / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 7, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Apr 10, 2011, 7:15 PM EDT for Alcona County, Alpena County, Montmorency County, Michigan. It was in force for 60 min. 1 report 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, 7:15 PM EDT (23:15 UTC)
- Expired
- Apr 10, 2011, 8:15 PM EDT
- In force
- 60 min
- Issued by
- NWS Gaylord, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Alcona County, MI, Alpena County, MI, Montmorency County, MI
The radar
The NCL Michigan radar (KAPX), 104 km from the middle of the area, began a volume at 23:14 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 10, 7:43 PM EDT | TSTM WND GST 50 | 4 W Atlanta, 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
Alpena, MI (KAPX), launched 12:00Z, 11.3 hours before the alert went out and 80 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
- 755 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 213 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
856
WUUS53 KAPX 102315
SVRAPX
MIC001-007-119-110015-
/O.NEW.KAPX.SV.W.0007.110410T2315Z-110411T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
715 PM EDT SUN APR 10 2011
THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN ALCONA COUNTY IN NORTHERN LOWER MICHIGAN...
ALPENA COUNTY IN NORTHERN LOWER MICHIGAN...
MONTMORENCY COUNTY IN NORTHERN LOWER MICHIGAN...
* UNTIL 815 PM EDT
* AT 714 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 NEAR
LOCKWOOD LAKE...OR 6 MILES EAST OF ATLANTA...AND MOVING EAST AT 60
MPH.
* LOCATIONS IMPACTED INCLUDE...
LACHINE...THE TOWN OF HUBBARD LAKE...ALPENA...OSSINEKE...LONG
LAKE...HILLMAN...FLETCHER POND...ROYSTON...SPRATT...LONG RAPIDS...
OSSINEKE TOWNSHIP...CATHRO...SPRUCE...NEGWEGON STATE PARK...BLACK
RIVER AND DEVILS LAKE.
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 4505 8324 4502 8328 4507 8339 4505 8343
4502 8341 4499 8345 4499 8341 4495 8344
4490 8331 4477 8330 4493 8435 4516 8424
4518 8336 4519 8333 4517 8335 4515 8331
4506 8329 4507 8323 4505 8318 4504 8318
TIME...MOT...LOC 2315Z 269DEG 52KT 4498 8400
WIND...HAIL 60MPH 1.00IN
$$2 follow-up statements
963
WWUS34 KAPX 102335
SVSAPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
735 PM EDT SUN APR 10 2011
MIC001-007-119-110015-
/O.CON.KAPX.SV.W.0007.000000T0000Z-110411T0015Z/
MONTMORENCY MI-ALCONA MI-ALPENA MI-
735 PM EDT SUN APR 10 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ALPENA...
NORTHEASTERN ALCONA AND MONTMORENCY COUNTIES UNTIL 815 PM EDT...
AT 731 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM LACHINE TO 6 MILES SOUTH OF
FLETCHER POND...MOVING EAST AT 50 MPH.
ADDITIONAL STORMS WILL MOVE INTO WESTERN MONTMORENCY COUNTY THROUGH
815 PM.
LOCATIONS IMPACTED INCLUDE...
THE TOWN OF HUBBARD LAKE...ALPENA...OSSINEKE...OSSINEKE TOWNSHIP...
CATHRO...SPRUCE...BLACK RIVER...NEGWEGON STATE PARK AND DEVILS
LAKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4505 8324 4502 8328 4507 8339 4505 8343
4502 8341 4499 8345 4499 8341 4495 8344
4490 8331 4477 8330 4493 8435 4516 8424
4518 8336 4519 8333 4517 8335 4515 8331
4506 8329 4507 8323 4505 8318 4504 8318
TIME...MOT...LOC 2334Z 269DEG 43KT 4508 8363 4489 8380
WIND...HAIL 60MPH 1.00IN
$$491
WWUS34 KAPX 110004
SVSAPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
804 PM EDT SUN APR 10 2011
MIC119-110014-
/O.CAN.KAPX.SV.W.0007.000000T0000Z-110411T0015Z/
MONTMORENCY MI-
804 PM EDT SUN APR 10 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEAST MONTMORENCY COUNTY
IS CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE
WARNED AREA.
LAT...LON 4505 8324 4502 8328 4507 8339 4505 8343
4503 8344 4502 8341 4500 8345 4495 8344
4490 8336 4490 8331 4477 8330 4486 8389
4515 8388 4518 8336 4515 8331 4505 8328
4507 8323 4505 8319
TIME...MOT...LOC 0004Z 269DEG 43KT 4508 8312 4489 8329
WIND...HAIL <50MPH <.50IN
$$
MIC001-007-110015-
/O.CON.KAPX.SV.W.0007.000000T0000Z-110411T0015Z/
ALCONA MI-ALPENA MI-
804 PM EDT SUN APR 10 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ALPENA AND
NORTHEASTERN ALCONA COUNTIES UNTIL 815 PM EDT...
AT 803 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 15 MILES EAST OF ALPENA TO
NEGWEGON STATE PARK...MOVING EAST AT 50 MPH.
LOCATIONS IMPACTED INCLUDE...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4505 8324 4502 8328 4507 8339 4505 8343
4503 8344 4502 8341 4500 8345 4495 8344
4490 8336 4490 8331 4477 8330 4486 8389
4515 8388 4518 8336 4515 8331 4505 8328
4507 8323 4505 8319
TIME...MOT...LOC 0004Z 269DEG 43KT 4508 8312 4489 8329
WIND...HAIL 60MPH 1.00IN
$$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, 6:24 PM EDT | Severe Thunderstorm Warning | APX | Benzie, Leelanau | 44 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, 7:27 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, 2011Every 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.