Campus Alert Archive
Iowa

Frostbite in Less Than 10 Minutes: Iowa's Hawk Alert Cancels In-Person Classes for -35 Wind Chills

IAwinter stormemergency notificationhigh confidence
Confirmed Threat

Beginning on January 15, 2025, the University of Iowa issued a series of Hawk Alerts ahead of and during a Winter Storm Warning with wind chills as low as -35 degrees. The university adjusted classroom instruction on January 16, shifting most classes to Zoom, and a follow-up Extreme Cold Warning Hawk Alert was issued on January 21, 2025 when wind chills again hit -30. The alerts warned that frostbite was possible in less than 10 minutes.

Alerts
3
Response
—
Killed
—
Injured
—
Institution
University of Iowa
Public R1 · IA
~31,000 studentsHawk Alert
Confirmed Timeline

Alert Sequence

3 messages in sequence · 3 verified verbatim

INITIAL ALERTSMS
Verified verbatimUniversity of Iowa Emergency Updates archive (official Hawk Alert text)157 chars
HAWK ALERT: Winter Storm Warning 6PM Wed-6AM Sat. Hazards include but not limited to wind chill as low as -35. Protect yourself from cold. More: e.uiowa.edu.
The alert was issued ahead of the 6 PM CST Wednesday January 15 Winter Storm Warning effective until 6 AM CST Saturday January 18, 2025
The phrase 'hazards include but not limited to wind chill as low as -35' is unusually clinical for an SMS alert and reflects the National Weather Service's hazard-summary language
The shortened URL 'e.uiowa.edu' represents the URL-shortening compromise required to fit Hawk Alerts into SMS character limits while preserving an authoritative campus link
UPDATESMS
Verified verbatimUniversity of Iowa Emergency Updates archive (official Hawk Alert text)155 chars
Hawk Alert: The University is adjusting classroom instruction on 1/16 due to extreme temperatures forecasted in our area. See emergency.uiowa.edu for more.
The phrase 'adjusting classroom instruction' is a softer formulation than 'cancellation' or 'closure' — it preserves academic continuity by directing instructors to use Zoom while stopping required in-person travel
The decision to adjust rather than cancel reflects post-COVID norms: Iowa, like many institutions, now treats severe weather as an opportunity to use the synchronous online tools developed for the pandemic
The use of 'extreme temperatures forecasted' rather than specifying -35 wind chill is intentional — the practical impact (no required travel) is what students need to know
FOLLOW-UPSMS
Verified verbatimUniversity of Iowa Emergency Updates archive (official Hawk Alert text)160 chars
HAWK ALERT: NWS Extreme Cold Warning in effect midnight through noon Tuesday, Jan. 21. -30 wind chill. Dress warm to protect yourself. More: emergency.uiowa.edu
This alert came after the initial January 15-18 Winter Storm Warning had ended, illustrating how a multi-day cold snap requires multiple distinct emergency notifications
The reduction from -35 (Jan 15-18) to -30 (Jan 21) wind chill demonstrates that even a small thermal change is meaningful at extreme cold — the National Weather Service uses different thresholds for 'extreme cold warning' vs. 'wind chill warning'
The instruction 'Dress warm to protect yourself' is unusually direct and personal — most institutional alerts use passive 'protective clothing recommended' language
Context

Background

The University of Iowa is a public R1 doctoral institution in Iowa City, with about 31,000 students. In mid-January 2025, the National Weather Service issued a Winter Storm Warning effective from 6 PM CST Wednesday, January 15 through 6 AM CST Saturday, January 18, 2025, with wind chills as low as -35 degrees. The University pushed an initial Hawk Alert and then a second alert announcing that classroom instruction would be adjusted on Thursday, January 16 — most classes shifted to Zoom for the day. Less than a week later, on Tuesday, January 21, 2025, an Extreme Cold Warning Hawk Alert covered a separate cold front with -30 wind chills from midnight through noon. The alerts noted that frostbite was possible on exposed skin in less than 10 minutes. Iowa's NITE RIDE late-night transportation service operated 10 PM to 5 AM CST during the cold snap to limit student exposure. The Iowa Hawk Alert sequence was a model of layered weather communication — a Winter Storm Warning and a separate Extreme Cold Warning, each with its own SMS push, archived for permanent public reference at emergency.uiowa.edu.
Analysis

Key Findings

The University of Iowa issued three distinct Hawk Alerts within a single week for two separate winter weather events — illustrating the multi-event communication challenge of a sustained cold snap
The shift from 'classroom instruction adjusted' to 'Zoom classes' is a post-COVID hybrid model that preserves academic continuity without requiring student travel in dangerous cold
Frostbite in less than 10 minutes at -35 wind chill is a clinically meaningful threshold that the alert system communicates without using precise medical terminology — a public-health communication best practice
Iowa's permanent Hawk Alert archive at emergency.uiowa.edu provides verbatim text for every alert, making it one of the most transparent campus alert systems in the country
Outcome
No reported injuries or campus emergencies attributable to the Hawk Alert sequence. The University of Iowa shifted most January 16, 2025 in-person classes to Zoom because of forecasted -35 wind chills. The NITE RIDE late-night transportation service operated to limit student exposure. A second Hawk Alert sequence covered an Extreme Cold Warning January 21 with -30 wind chills. Campus operations otherwise continued throughout the week.
Provenance

Sources

  1. Official
    HAWK ALERT: Winter Storm Warning 6PM Wed-6AM Sat (UI Emergency Updates)
    emergency.uiowa.edu
  2. Official
    Hawk Alert: University adjusting classroom instruction on 1/16 (UI Emergency Updates)
    emergency.uiowa.edu
  3. Official
    HAWK ALERT: NWS Extreme Cold Warning in effect midnight through noon Tuesday, Jan. 21 (UI Emergency Updates)
    emergency.uiowa.edu
  4. Official
    Winter Weather Safety Reminders (UI Campus Safety)
    safety.uiowa.edu
  5. Official
    Reminder: Preparing for Extreme Weather (UI Campus Safety)
    safety.uiowa.edu
  6. Official
    Hawk Alert (UI Department of Public Safety)
    police.uiowa.edu
Tags
winter-stormextreme-coldiowapublic-r1hawk-alertwind-chillverbatimfrostbitezoom-classes
Added May 2026Updated May 2026Via ingestion