A thunderstorm moving through southern Lake Huron produced a 48 mph thunderstorm wind gust near Harbor Beach.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS DTX wrote it up.
A thunderstorm moving through southern Lake Huron produced a 48 mph thunderstorm wind gust near Harbor Beach.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Detroit, MI wrote its last area forecast discussion before the first event at Apr 26, 7:37 PM EST, 4 hours 11 minutes earlier.
Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
837 PM EDT Wed Apr 26 2017
.UPDATE...
Robust convection is maintaining intensity as it moves rapidly
through Indiana adding confidence that it will reach central Lower
Michigan in some form during mid to late evening. Hourly mesoanalysis
indicates the storms are operating in a strong wind profile with an
adequate combination of surface based and elevated instability. A
ribbon of 50 kt effective bulk shear extends northward from Indiana
into central Lower Michigan along the surface trough/lake breeze
hybrid where showery convection lingers through the Tri Cities. The
wind profile will keep the Indiana convection more organized while
MUCAPE lingers around 1000 J/kg along a similar corridor. This is a
measure of instability that illustrates lingering potential as
surface based CAPE begins to diminish after daytime heating. The
latest projections suggest the strongest storms will move north of
the border while possibly brushing Lenawee and Washtenaw counties and
then track toward Howell, Flint, and the Tri Cities region during
late evening. The earlier update expanded chance POPs mainly west of
the U.S.23/I-75 corridor into the Flint, Tri Cities, and western
Thumb. Later updates are planned based on a downward intensity trend
while coverage remains on the numerous side through about midnight to
2 AM.
&&
.PREV DISCUSSION...
Issued at 707 PM EDT Wed Apr 26 2017
AVIATION...
The primary short term aviation concern will be with showers/storms
ongoing in isolated fashion from central Lower Michigan southward to
a larger complex over Illinois/Indiana that is moving quickly toward
Lower Michigan during the evening. There are indications this
activity will follow the prefrontal trough northward into central
Lower Michigan where the boundary has become a trough/lake breeze
hybrid from Lake Michigan. A weakening trend is also anticipated due
to the loss of daytime heating and instability, although remnant
showers could produce MVFR/brief IFR impacts mainly north of PTK.
Plan to hold off on the mention of thunder due to the weakening that
is expected but will add a tempo for showers for mid to late evening.
Outside of the evening convection, VFR will remain in place through
tonight at all terminals as the cold front over the Midwest takes
until mid Thursday morning to move eastward. The front will be
preceded by light south wind during the night under a low level jet
slightly below the 30 knot low level wind shear criteria for
inclusion in the TAF. Surface wind gusts around 30 knots are then
expected to develop before the frontal passage and persist past the
westerly wind shift through the afternoon. A chance of thunderstorms
will remain in the forecast to encompass the strong frontal passage
with VFR to follow into Thursday evening.
For DTW... The path of showers/storms over Indiana is expected to
remain west and north of DTW through the evening. VFR will then
become more firmly established during the night ahead of the cold
front that is expected to arrive at the terminal around 19Z Thursday
afternoon. Gusty south wind will develop during the morning before
the front with a chance of thunderstorms as the front moves through
the region.
//DTW THRESHOLD PROBABILITIES...
* Moderate for ceiling 5000 ft or less Thursday afternoon.
* Low for thunderstorms tonight. Moderate along the front Thursday.
PREV DISCUSSION...
Issued at 344 PM EDT Wed Apr 26 2017
DISCUSSION...
Ample insolation combined with strong south/southeasterly transport
has supported a solid temperature rise this afternoon. The
temperature rise has been slightly muted east of the limiting
streamline (evidenced by the density discontinuity observed as a
fine line in KDTX reflectivity imagery) attendant to the west end of
Lake Erie (owing to widespread lake shadowing withing the strong
flow). Temperatures west of the boundary have touched 80F, while
remaining in the lower to mid 70s in the lake shadows.
Moisture quality is slowly increasing over western Lower Michigan -
as witnessed by increasing boundary layer cumulus and even some
small scale shower development. The ribbon of better lower-
tropospheric moisture is expected to slip east through the next
several hours. An isolated shower or two is possible as this occurs;
however, given the slightly lower surface temperatures and resultant
slightly more stable environment, expectations are for any robust
development to tied to the better congestus field along the lee of
Lake Michigan convergence zone. This feature is expected to sweep
northeast and may eventually affect the Saginaw Valley during the
evening. Otherwise, high level cloudcover is expected to slowly
overspread the region during the evening hours, as convection over
the mid-Mississippi valley continue to mature.
The mature surface low, located over northern Wisconsin, will
continue to move north/northeast. The accompanying cold front is
roughly aligned along the mean steering flow vector - which will
limit the eastward progression through the night. Consequently, the
deep moisture plume along the cold front will take all night to
advance east into portions of Southeast Michigan. Additionally, the
quality of the deep moisture will decrease substantially as it loses
connection with moisture transport from the Gulf of Mexico.
During the day Thursday, the cold front will be dominated by
confluent flow - limiting the ability to provide a solid ribbon of
ascent. Therefore, expectations are for only a couple of broken
lines of convection along the boundary as it slides through during
the midday hours. Instability along the boundary is expected to be
rather meager - but may be sufficient to produce some scattered
thunderstorm activity. The flow in the column will remain strong and
will support gusty conditions across all of Southeast Michigan, with
the possibility of convectively enhanced gusts certainly possible
(thus the SPC Marginal Risk for severe weather).
The next is the series of strong western CONUS systems will dig into
the southern Plains by Saturday. Moisture transport in response the
deepening surface low will set the stage for period rainfall chances
across the southern Great Lakes region starting late Friday. The
system is expected to strengthen substantially through the weekend
and lift northeast into the western Great Lakes region by early
Monday. During the development timeframe, several waves of rainfall
will be possible across southeast Michigan. Cooler than normal
conditions are expected for several days in the wake of the system.
MARINE...
Moderate pre-frontal southeast wind will remain in place through
tonight. Existing higher degree of stability will continue to limit
higher gust potential, with gusts capped at or below 25 knots during
this time. Winds will turn to southwesterly as a cold front slips
through by late Thursday. The combination of increasingly gusty
conditions and a period of wave heights above 3 feet will lead to a
marginal small craft condition Thursday across Saginaw Bay and the
lake Huron nearshore waters. There will be a low probability for
thunderstorms with the cold frontal passage early Thursday
afternoon. Winds and waves will diminish Thursday evening as high
pressure builds into the region. Lower southwest winds speeds
expected Friday as this high sustains a weaker gradient.
&&
.DTX WATCHES/WARNINGS/ADVISORIES...
MI...NONE.
Lake Huron...Small Craft Advisory from 10 AM to 10 PM EDT Thursday for LHZ421-
422-441>443.
Lake St Clair...NONE.
Michigan waters of Lake Erie...NONE.
&&
UPDATE.......BT
AVIATION.....BT
DISCUSSION...Mann
MARINE.......MR
You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.Hazardous Weather Outlook National Weather Service Detroit/Pontiac MI 900 PM EDT Wed Apr 26 2017 MIZ047>049-053-054-060-061-068-075-082-280100- Midland-Bay-Huron-Saginaw-Tuscola-Shiawassee-Genesee-Livingston- Washtenaw-Lenawee- 900 PM EDT Wed Apr 26 2017 This hazardous weather outlook is for portions of southeast Michigan. .DAY ONE...Tonight There is a chance of thunderstorms tonight during the late evening into early morning, mainly between 1000 PM and 200 AM. The storms are expected to approach severe limits from the Ohio border up to about I-96 and then weaken further to the north through the Tri Cities. Wind gusts around 50 mph and up to nickel size hail will be possible as storms move southwest to northeast at 50 mph. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There is a chance of thunderstorms on Thursday across all of southeast Michigan when a cold front sweeps through. There is a marginal risk of severe storms, with damaging winds being the main hazard. .SPOTTER INFORMATION STATEMENT... Spotter activation is not planned tonight. MIZ055-062-063-069-070-076-083-280100- Sanilac-Lapeer-St. Clair-Oakland-Macomb-Wayne-Monroe- 900 PM EDT Wed Apr 26 2017 This hazardous weather outlook is for portions of southeast Michigan. .DAY ONE...Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There is a chance of thunderstorms on Thursday across all of southeast Michigan when a cold front sweeps through. There is a marginal risk of severe storms, with damaging winds being the main hazard. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed tonight. LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-280100- Lake St. Clair- Michigan Waters of Lake Erie from Detroit River to North Cape MI- Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 900 PM EDT Wed Apr 26 2017 This hazardous weather outlook is for portions of Lake Erie, Lake Huron and Lake St Clair. .DAY ONE...Tonight There is a chance of thunderstorms tonight over Saginaw Bay and central to northern Lake Huron. Strong wind gusts greater than 35 knots will be possible but limited to shoreline areas while hail of a half inch or less is also possible in the strongest storms. Motion will be southwest to northeast at 45 knots. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There is a better chance of thunderstorms Thursday as a cold front sweeps through. There is a marginal risk of severe storms, with damaging winds being the main hazard. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed tonight. You can obtain your latest National Weather Service forecasts online at www.weather.gov/detroit. BT
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1056 PM EDT WED APR 26 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1020 PM HAIL 3 W MANCHESTER 42.15N 84.09W
04/26/2017 M0.75 INCH WASHTENAW MI PUBLIC
REPORTED VIA TWITTER
&&
DKOOKSpecial Weather Statement
National Weather Service Detroit/Pontiac MI
1123 PM EDT WED APR 26 2017
MIZ060>062-270430-
Shiawassee MI-Genesee MI-Lapeer MI-
1123 PM EDT WED APR 26 2017
...SIGNIFICANT WEATHER ADVISORY FOR LAPEER...SHIAWASSEE AND GENESEE
COUNTIES UNTIL 1230 AM EDT...
At 1122 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from near Metamora to Hartland to near Laingsburg.
Movement was northeast at 50 mph.
Wind gusts up to 50 mph will be possible with these storms.
Strong thunderstorms will be near...
Metamora around 1130 PM EDT.
Henderson and Lake Fenton around 1140 PM EDT.
Grand Blanc, Goodrich and Lum around 1145 PM EDT.
New Lothrop around 1150 PM EDT.
Davison and Hadley around 1155 PM EDT.
Montrose around 1200 AM EDT.
Lapeer around 1205 AM EDT.
Columbiaville around 1210 AM EDT.
Other locations impacted by these storms include Atlas, Attica, Elba,
Rankin, Argentine, Genesee, Vernon, Thornville, Juddville and
Burnside.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4313 8436 4313 8393 4322 8393 4324 8335
4332 8335 4330 8312 4328 8312 4328 8300
4288 8326 4287 8369 4278 8369 4278 8436
TIME...MOT...LOC 0322Z 217DEG 44KT 4290 8335 4266 8375 4288 8429
BTPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1150 PM EDT WED APR 26 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1115 PM TSTM WND GST HOWELL 42.61N 83.94W
04/26/2017 M70 MPH LIVINGSTON MI ASOS
WIND GUST MEASURED AT THE HOWELL ASOS SITE. POWER OUTAGES
REPORTED FROM LIVINGSTON CO. DISPATCH.
&&
DKOOKPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1154 PM EDT WED APR 26 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1144 PM TSTM WND DMG 4 NE HOLLY 42.84N 83.56W
04/26/2017 OAKLAND MI UTILITY COMPANY
REPORTED POWER OUTAGES
&&
DKOOKSpecial Weather Statement
National Weather Service Detroit/Pontiac MI
1204 AM EDT THU APR 27 2017
MIZ053-054-270500-
Tuscola MI-Saginaw MI-
1204 AM EDT THU APR 27 2017
...SIGNIFICANT WEATHER ADVISORY FOR TUSCOLA AND SOUTHEASTERN SAGINAW
COUNTIES UNTIL 100 AM EDT...
At 1203 AM EDT, Doppler radar indicated strong thunderstorms along a
line extending from near Birch Run to near Otter Lake. Movement was
northeast at 45 mph.
Wind gusts up to 50 mph will be possible with these storms.
Strong thunderstorms will be near...
Millington around 1210 AM EDT.
Mayville around 1220 AM EDT.
Vassar and Reese around 1225 AM EDT.
Fairgrove and Kingston around 1235 AM EDT.
Caro and Akron around 1240 AM EDT.
Unionville around 1250 AM EDT.
Cass City and Gagetown around 100 AM EDT.
Other locations impacted by these storms include East Dayton, Deford,
Tuscola, Colling, Wilmot, Colwood, Burt, Ellington, Gera and Gilford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4371 8347 4367 8346 4367 8312 4346 8311
4332 8330 4332 8335 4328 8336 4323 8342
4323 8346 4322 8346 4322 8393 4371 8349
TIME...MOT...LOC 0403Z 224DEG 39KT 4326 8385 4320 8350
BTSpecial Weather Statement
National Weather Service Detroit/Pontiac MI
1217 AM EDT THU APR 27 2017
MIZ055-270515-
Sanilac MI-
1217 AM EDT THU APR 27 2017
...SIGNIFICANT WEATHER ADVISORY FOR SANILAC COUNTY UNTIL 115 AM
EDT...
At 1216 AM EDT, Doppler radar indicated strong thunderstorms along a
line extending from near Argyle to near Peck. Movement was northeast
at 45 mph.
Wind gusts up to 50 mph will be possible with these storms.
Strong thunderstorms will be near...
Argyle around 1220 AM EDT.
Carsonville around 1235 AM EDT.
Deckerville around 1240 AM EDT.
Forestville around 1255 AM EDT.
Other locations impacted by these storms include Tyre, Decker, Palms,
Watertown, McGregor, Forester, Minden, Snover, Juhl and Elmer.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4321 8299 4322 8300 4328 8300 4328 8310
4330 8312 4333 8312 4333 8310 4367 8312
4369 8261 4343 8255
TIME...MOT...LOC 0416Z 208DEG 40KT 4361 8292 4328 8288
BTThe Detroit radar (KDTX), 145 km away, was scanning. The volume nearest the first event began at 04:49 UTC.
1 marine thunderstorm wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Huron in 2017Every state in 2017This day in weather history
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 693173.