High winds developed across northwest Indiana during the morning of March 13th and continued into the early afternoon.
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 LOT wrote it up.
High winds developed across northwest Indiana during the morning of March 13th and continued into the early afternoon.
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 Chicago, IL wrote its last area forecast discussion before the first event at Mar 12, 11:08 PM CST, 2 hours 40 minutes earlier. Its key messages:
Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
1208 AM CDT Fri Mar 13 2026
.KEY MESSAGES...
- Strong to very strong winds develop overnight tonight and
especially Friday morning/early afternoon with peak gusts of
50 to 60 mph during this time. High Wind Warning now in effect
for most areas of northern IL and northwestern IN, with Wind
Advisories across central IL and IN.
- Small potential for snow/graupel squalls with a cold front
late tonight, mainly across far northern Illinois.
- Strong storm system may bring a threat for strong storms to
the region on Sunday, followed by accumulating snow and
another round of very strong winds Sunday night into Monday.
- Turning much colder early next week with Monday morning and
Tuesday morning wind chills below zero.
&&
.DISCUSSION...
Issued at 322 PM CDT Thu Mar 12 2026
Through Friday night:
We have opted to upgrade the High Wind Watch to a warning for
tonight and Friday. In additional to the watch area, we have also
opted to include northwestern parts of IL, including the Rockford
region. A Wind Advisory remains in effect farther south across
central IL.
Confidence continues to increase that wind gusts will peak up
around (or even a bit above) 60 mph very late tonight into Friday
morning across the warned area, owing to the strength of the low
shifting into the Upper Great Lakes on Friday. A strong southerly
mass response will materialize across the region through this
evening and overnight as an impressive 70+ kt southwesterly low-
level jet develops. While we will not see wind gusts to this
magnitude at the surface, strong surface pressure falls (on the
order of ~18 mb per 6hr) overspreading the western Great Lakes in
advance of the approaching surface low will support increasingly
gusty surface winds through the night. Accordingly, we expect
southwesterly wind gusts to increase into the 45 to 50 mph range
after midnight tonight. Then, as the surface front moves across
the area into the predawn hours of Friday morning, winds will
become westerly with the cold frontal passage. Wind speeds will
peak in the 55 to 60 mph range across the warned area directly in
the wake of the front early Friday morning. Strong gusty west
winds will persist into the afternoon, but speeds should gradually
settle in the 45 to 50 mph range late in the morning and
afternoon. Wind gusts will then quickly abate with sunset Friday
evening as a progressive area of surface high pressure shifts east
across the area into early Saturday.
In addition to the strong winds, an area of showers is also
expected to develop for a period tonight along the nose of the
increasing low-level jet. The greatest chances for these (up to
~80%) continue to be across far northern IL into northwestern IN
from mid evening through early Friday morning (~9 pm through 3
am).
KJB
Saturday through Thursday:
A west-northwest flow pattern will develop across much of the
northern CONUS and Great Lakes on Saturday. A modest mid-level
shortwave trough is expected to dive across northern IL and
northwest IN and interact with a stalled baroclinic zone. While
low- level moisture looks to be a bit of a limiting factor, mid-
level moisture will be sufficient to support a couple of light
showers on Saturday (20-30% chance). With temperatures aloft
forecast to be below freezing and most of the moisture residing
in the snow growth region, it appears that any precipitation on
Saturday would fall as snow though some rain/snow mix is
possible especially during the afternoon hours. Regardless,
surface temperatures are forecast to warm into the upper 30s and
lower 40s so little to no accumulation is expected.
Heading into Saturday night, a deepening trough is expected to
begin digging into the central Plains which will lead to the
development of a strong surface low on the leeward side of the
Rockies that will then lift into northern IL and the Great Lakes
on Sunday. As the low develops the aforementioned baroclinic
zone is forecast to lift north as a warm front Saturday night.
While there is some uncertainty as to how far north the front
will get, the general consensus is for the front to stall near
the IL-WI line which would place most of northern IL and
northwest IN in the warm sector. Therefore, as the surface low
lifts towards the area the strong warm advection ahead of it
will likely lead to the development of scattered showers and
thunderstorms on Sunday, especially along and south of I-80.
Given that forecast soundings don't show much instability (warm
air aloft likely causing a modest cap) thunder coverage will
likely be some what limited, but with the strong dynamics of the
system and the 40-50 kts of shear present a few strong to
possibly severe storms cannot be ruled out Sunday afternoon.
As the low moves into the Great Lakes Sunday evening it will
drag a strong cold front through northern IL and northwest IN
Sunday night into Monday. With temperatures forecast to quickly
cool Sunday night behind the front the rain on Sunday will
quickly transition over to snow by Monday morning. In fact,
there is even a chance (10-20%) chance for a period of freezing
rain and/or sleet Sunday night as temperatures cool but with
uncertainties in how fast temperatures cool, especially aloft,
have opted to keep a rain/snow mention in the forecast for now.
Once snow begins it is expected to prevail through the day on
Monday which will likely result in snow accumulations as
temperatures will be in the 20s through the day. That said,
there is a lot of uncertainty as to how much snow will fall due
to differences in where the deformation band on the back of the
low will develop and how deep the low will be, but latest
ensemble probabilities do have a good portion of northern IL
with at 50-60% chance of at least 2 inches of snow. Regardless
of how much snow falls, winds behind this system will be quite
strong with 35- 40+ mph gusts likely Sunday night through
Monday. Thus blowing snow is expected to develop on Monday which
will likely result in hazardous travel conditions due to
reduced visibility and snow covered roads even with lesser
accumulations.
The system and its associated snow will begin to shift east
Monday evening, but the pattern aloft will remain locked in a
northwest flow regime through the end of the week. This flow
regime will result in notably colder temperatures through the
early part of next week especially on Tuesday where highs are
forecast to be in the 20s. Additionally, this pattern will also
put in a favorable spot for clipper systems to brush the area
and bring us more chances for precipitation at times. While the
first of these periods of precipitation looks to be late Tuesday
into Wednesday, there is uncertainty of location and impacts so
stay tuned.
Yack
&&
.AVIATION /06Z TAFS THROUGH 12Z SATURDAY/...
Issued at 1208 AM CDT Fri Mar 13 2026
A potent storm system will race through the Great Lakes region
through the TAF period leading to inclement aviation conditions
mainly in the form of strong winds.
South to southeast winds at press time are expected to turn
southwesterly over the coming hours as warm air advection-driven
showers sliding overhead force downward mixing of the
increasingly strong low-level wind field via evaporation.
Indeed, do expect surface gusts to increase in magnitude over
the coming hours, with prevailing gusts of 25 to 35kt through
daybreak. Any rain that does reach the surface though daybreak
is not expected to lead to any visby or cig restriction. Cloud
bases should remain above 4000 feet through daybreak.
After daybreak, strong pressure rises on the order of 8mb/6hr
will drive strong westerly winds with sustained winds of 25-30kt
and gusts of 45-50kt. The strongest winds are expected in the
12-20Z window before gradually subsiding through the late
afternoon and evening hours. A band of MVFR stratus based
between 2000 and 3000 ft should spread over the terminals from
daybreak and lift to around 4000 feet this afternoon.
Winds will continue subsiding after sunset and cease gusting
entirely between 02-04Z. In fact, winds may turn nearly calm
toward the end of the TAF Period as a surface high pressure
system builds into the region. Mid-level clouds will thicken
tonight in advance of the next storm system developing over the
central US.
Borchardt
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...High Wind Warning until 4 PM CDT this afternoon for ILZ003-
ILZ004-ILZ005-ILZ006-ILZ008-ILZ010-ILZ011-ILZ012-ILZ013-
ILZ019-ILZ020-ILZ021-ILZ023-ILZ103-ILZ104-ILZ105-ILZ106-
ILZ107-ILZ108.
Wind Advisory until 6 PM CDT this evening for ILZ032-ILZ033-
ILZ039.
IN...High Wind Warning until 4 PM CDT this afternoon for INZ001-
INZ002-INZ010-INZ011.
Wind Advisory until 7 PM EDT this evening for INZ019.
LM...Gale Warning until 4 AM CDT early this morning for the IL and
IN nearshore waters.
Gale Warning from 4 PM this afternoon to 10 PM CDT this
evening for the IL and IN nearshore waters.
Storm Warning from 4 AM early this morning to 4 PM CDT this
afternoon for the IL and IN nearshore waters.
&&
Visit us at weather.gov/chicagoHazardous Weather Outlook National Weather Service Chicago/Romeoville IL 317 PM CDT Thu Mar 12 2026 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-132030- Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage- La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford- Northern Cook-Central Cook-Southern Cook-Northern Will- Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton- 317 PM CDT Thu Mar 12 2026 /417 PM EDT Thu Mar 12 2026/ This Hazardous Weather Outlook is for portions of north central Illinois...northeast Illinois and northwest Indiana. .DAY ONE...Tonight. Weather hazards expected... Significant Non Thunderstorm Wind Risk. DISCUSSION... Southerly winds will strengthen overnight, gusting up to 50 to 60 mph at times late tonight. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Friday... Significant Non Thunderstorm Wind Risk. Saturday... Limited Snow Risk mainly far northern Illinois. Sunday... Limited Thunderstorm Risk. Significant Non Thunderstorm Wind Risk. Sunday Night and Monday... Elevated Non Thunderstorm Wind Risk. Elevated Snow and Blowing Snow Risk. DISCUSSION... Strong to locally damaging non-thunderstorm westerly winds are expected on Friday. The strongest winds could gust up to 60 mph. Winds will gradually ease during the afternoon. A period of accumulating snow and blowing snow associated travel impacts are becoming increasingly likely, mainly north and west of I- 55 Sunday night into Monday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be necessary through tonight. LMZ740>745-132030- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 317 PM CDT Thu Mar 12 2026 This Hazardous Weather Outlook is for portions of the Illinois nearshore waters of Lake Michigan and the Indiana nearshore waters of Lake Michigan. .DAY ONE...Tonight. Weather hazards expected... Storm force winds and or extremely hazardous waves. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Friday... Storm force winds and extremely hazardous waves. Saturday... Hazardous conditions for small craft are likely. Sunday... Hazardous conditions for small craft are likely. Limited Thunderstorm Risk. Monday and Tuesday... Hazardous conditions for small craft are likely. KJB Visit us at www.weather.gov/chicago
The national radar mosaic for the moment the first event began.
6 high wind. Local standard time, as filed.
A wind gust to 63 mph was measured at the Valparaiso Airport.
Winds gusted above 58 mph for several hours at the Gary Airport with a peak gust to 72 mph.
A wind gust to 63 mph was measured at the Valparaiso Airport.
A wind gust to 60 mph was measured at the Valparaiso Airport.
A semi truck was blown over near mile marker 222 which blocked traffic and caused southbound Interstate 65 to be closed. A second semi truck was blown over into a ditch on northbound Interstate 65 near mile marker 238.
Winds gusted above 58 mph for one hour at the Gary Airport with a peak gust to 62 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2026Every state in 2026This day in weather historyWarnings in Indiana, March 2026
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: 1318701, 1318698, 1318702, 1318703, 1318463, 1318700.