Alert archive / Michigan / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 71, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Jul 18, 2011, 1:03 AM EDT for 7 counties in Michigan. It was in force for 47 min. 2 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
- Jul 18, 2011, 1:03 AM EDT (05:03 UTC)
- Expired
- Jul 18, 2011, 1:50 AM EDT
- In force
- 47 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, Crawford County, MI, Montmorency County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI
The radar
The NCL Michigan radar (KAPX), 41 km from the middle of the area, began a volume at 05:05 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 |
|---|---|---|---|
| Jul 18, 1:30 AM EDT | TSTM WND DMG | Atlanta, MI | REPORTS OF TREES DOWN IN VARIOUS PARTS OF THE COUNTY. |
| Jul 18, 1:35 AM EDT | TSTM WND GST 50 | 3 E Atlanta, MI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Alpena, MI (KAPX), launched 00:00Z, 5.1 hours before the alert went out and 143 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
- 2447 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1112 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.4
The text
As transmitted, in the capitals the NWS used until 2016.
533
WUUS53 KAPX 180503
SVRAPX
MIC001-007-039-119-135-137-141-180600-
/O.NEW.KAPX.SV.W.0071.110718T0503Z-110718T0600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
103 AM EDT MON JUL 18 2011
THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN ALCONA COUNTY IN NORTHERN LOWER MICHIGAN...
SOUTHWESTERN ALPENA COUNTY IN NORTHERN LOWER MICHIGAN...
NORTHEASTERN CRAWFORD COUNTY IN NORTHERN LOWER MICHIGAN...
MONTMORENCY COUNTY IN NORTHERN LOWER MICHIGAN...
NORTHERN OSCODA COUNTY IN NORTHERN LOWER MICHIGAN...
EASTERN OTSEGO COUNTY IN NORTHERN LOWER MICHIGAN...
SOUTHWESTERN PRESQUE ISLE COUNTY IN NORTHERN LOWER MICHIGAN...
* UNTIL 200 AM EDT
* AT 100 AM 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 5 MILES NORTHEAST OF TOMAHAWK
CREEK FLOODING TO VANDERBILT...AND MOVING SOUTHEAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
ATLANTA...LEWISTON...MIO...THE TOWN OF HUBBARD LAKE...LONG LAKE...
GRASS LAKE...BRILEY TOWNSHIP...JOHANNESBURG...CHESTER TOWNSHIP...
HETHERTON...HILLMAN...LOVELLS...FLETCHER POND...GARLAND...SPRATT...
LOUD TOWNSHIP...LOCKWOOD LAKE...RED OAK...OSSINEKE TOWNSHIP AND
LUZERNE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING WINDS IN EXCESS OF 60 MILES
PER HOUR. 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 4459 8430 4498 8465 4520 8437 4520 8425
4524 8424 4528 8409 4486 8353
TIME...MOT...LOC 0503Z 308DEG 36KT 4522 8405 4510 8455
WIND...HAIL 60MPH 1.00IN
$$
JPB/MSB2 follow-up statements
279 WWUS34 KAPX 180529 SVSAPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GAYLORD MI 129 AM EDT MON JUL 18 2011 MIC141-180538- /O.CAN.KAPX.SV.W.0071.000000T0000Z-110718T0600Z/ PRESQUE ISLE MI- 129 AM EDT MON JUL 18 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PRESQUE ISLE COUNTY IS CANCELLED... THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED AREA. LAT...LON 4459 8430 4492 8460 4518 8395 4486 8353 TIME...MOT...LOC 0528Z 310DEG 42KT 4517 8373 4483 8461 WIND...HAIL <50MPH <.50IN $$ MIC001-007-039-119-135-137-180600- /O.CON.KAPX.SV.W.0071.000000T0000Z-110718T0600Z/ ALCONA MI-CRAWFORD MI-MONTMORENCY MI-OSCODA MI-OTSEGO MI-ALPENA MI- 129 AM EDT MON JUL 18 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN ALPENA...SOUTHEASTERN OTSEGO...NORTHERN OSCODA...MONTMORENCY... NORTHEASTERN CRAWFORD AND NORTHWESTERN ALCONA COUNTIES UNTIL 200 AM EDT... AT 127 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM LONG RAPIDS TO 6 MILES SOUTHEAST OF WATERS...MOVING SOUTHEAST AT 50 MPH. LOCATIONS IMPACTED INCLUDE... LEWISTON...MIO...HILLMAN...LOVELLS...GARLAND...SPRATT... COMINS...RED OAK...FAIRVIEW...AND LUZERNE. 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. && LAT...LON 4459 8430 4492 8460 4518 8395 4486 8353 TIME...MOT...LOC 0528Z 310DEG 42KT 4517 8373 4483 8461 WIND...HAIL 60MPH <.50IN $$ JPB/MSB
823 WWUS34 KAPX 180550 SVSAPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GAYLORD MI 150 AM EDT MON JUL 18 2011 MIC001-007-039-119-135-137-180600- /O.CAN.KAPX.SV.W.0071.000000T0000Z-110718T0600Z/ ALCONA MI-CRAWFORD MI-MONTMORENCY MI-OSCODA MI-OTSEGO MI-ALPENA MI- 150 AM EDT MON JUL 18 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ALPENA... SOUTHEASTERN OTSEGO...NORTHERN OSCODA...MONTMORENCY...NORTHEASTERN CRAWFORD AND NORTHWESTERN ALCONA COUNTIES IS CANCELLED... THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. LAT...LON 4459 8430 4492 8460 4518 8395 4486 8353 TIME...MOT...LOC 0550Z 310DEG 42KT 4485 8362 4454 8451 WIND...HAIL <50MPH <.50IN $$
The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 10:56 PM EDT | Severe Thunderstorm Warning | APX | Chippewa, Mackinac | 64 min |
| Jul 17, 11:41 PM EDT | Special Marine Warning | APX | 94 min | |
| Jul 17, 11:55 PM EDT | Special Marine Warning | APX | 76 min | |
| Jul 18, 12:22 AM EDT | Special Marine Warning | APX | 24 min | |
| Jul 18, 12:29 AM EDT | Severe Thunderstorm Warning | APX | Antrim, Benzie, Charlevoix, Cheboygan, Emmet, Grand Traverse and 4 more | 61 min |
| Jul 18, 12:35 AM EDT | Special Marine Warning | APX | 85 min | |
| Jul 18, 2:04 AM EDT | Special Marine Warning | APX | 86 min | |
| Jul 18, 2:29 AM EDT | Special Marine Warning | APX | 91 min | |
| Jul 18, 4:26 AM EDT | Special Marine Warning | APX | 73 min | |
| Jul 18, 11:48 AM EDT | Special Marine Warning | APX | 87 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.