Alert archive / Illinois / Flash Flood Warnings in 1997
Flash Flood Warning 2, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Feb 21, 1997, 8:14 AM CST for 4 counties in Illinois. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 21, 1997, 8:14 AM CST (14:14 UTC)
- Expired
- Feb 21, 1997, 12:00 PM CST
- In force
- 4 hr
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
Counties Boone County, IL, DeKalb County, IL, Lake County, IL, McHenry County, IL
The radar
The Chicago radar (KLOT), 76 km from the middle of the area, began a volume at 14:17 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.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 2.2 hours before the alert went out and 180 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 499 m above ground
- 0-6 km bulk shear
- 97 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 728 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCHI 211402 FFWCHI ILC007-031-037-043-089-093-097-111-197-INC089-211805- FLOOD WARNING NATIONAL WEATHER SERVICE CHICAGO IL 814 AM CST FRI FEB 21 1997 A FLOOD WARNING HAS BEEN ISSUED FOR NORTHEAST ILLINOIS AND EXTREME NORTHWEST INDIANA THROUGH NOON TODAY. 1.5 TO 3.5 INCHES OF RAIN HAVE FALLEN IN THE PAST 18 HOURS ACROSS NORTHERN ILLINOIS. THIS HEAVY RAIN COMBINED WITH THE EFFECTS OF THE MELTED SNOW HAS CAUSED FLOODING TO OCCUR IN MANY AREAS IN NORTHEAST ILLINOIS. SEVERAL REPORTS OF WATER ON ROADWAYS HAVE BEEN RECEIVED THIS MORNING. SOME SECONDARY ROADS IN BOONE COUNTY ARE COVERED BY WATER. ROUTE 59 NEAR DUPAGE COUNTY AIRPORT HAS BEEN CLOSED DUE TO WATER. RAIN IS EXPECTED TO CONTINUE THROUGH THE DAY BEFORE CHANGING TO SNOW. ADDITIONAL RAINFALL WILL ONLY SERVE TO AGGRAVATE THE CURRENT HIGH WATER AND FLOODING PROBLEMS. IF YOU LIVE IN FLOOD PRONE ARE BE ALERT TO RISING WATERS. IF YOU ARE DRIVING BE ALERT FOR WATER ON THE ROAD. ANOTHER STATEMENTB UPDATING THE RAIN AND FLOODING SITUATION WILL BE ISSUED AROUND NOON TODAY. $$ SOMREK
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Feb 21, 5:50 AM CST, 2 hours 24 minutes before
ILZ003>006-008-010>014-019>023-032>033-039-INZ001-211700- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO IL 600 AM CST FRI FEB 21 1997 FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND LAKE COUNTY INDIANA A LOW PRESSURE SYSTEM IN THE SOUTHERN PLAINS WILL MOVE NORTHEAST TO ILLINOIS TODAY. AN EXTENEDED PERIOD OF RAIN WILL ACCOMPANY THE SYSTEM AS IT APPROACHES NORTHERN ILLINOIS. THE RAIN MAY BE HEAVY AT TIMES AND WILL POSE A THREAT OF FLOODING. A FLOOD WATCH REMAINS IN EFFECT TODAY FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHEAST INDIANA. IF YOU LIVE ALONG SMALL STREAMS AND LOW LYING AREAS PRONE TO FLOODING BE ALERT FOR FLOODING CONDITIONS TODAY. AS THE LOW PRESSURE CENTER PASSES THROUGH ILLINOIS COLDER AIR WILL HELP CHANGE THE RAIN TO SNOW. THE CHANGEOVER WILL BEGIN BY LATE AFTERNOON OR EVENING. AT FIRST THE RAIN WILL BE MIXED WITH WET SNOW BUT AS TEMPERATURES CONTINUE TO FALL THE RAIN WILL CHANGE TO ALL SNOW. SNOWFALLz AMOUNTS OF 3 TO 5 INCHES ARE EXPECTED BEFORE THE SNOW ENDS LATE TONIGHT AND EARLY SATURDAY. SOMREK
Special weather statement, Feb 21, 5:58 AM CST, 2 hours 16 minutes before
ILZ003>006-008-010>014-019>023-032>033-039-INZ001-211700- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO IL 600 AM CST FRI FEB 21 1997 FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND LAKE COUNTY INDIANA A LOW PRESSURE SYSTEM IN THE SOUTHERN PLAINS WILL MOVE NORTHEAST TO ILLINOIS TODAY. AN EXTENEDED PERIOD OF RAIN WILL ACCOMPANY THE SYSTEM AS IT APPROACHES NORTHERN ILLINOIS. THE RAIN MAY BE HEAVY AT TIMES AND WILL POSE A THREAT OF FLOODING. A FLOOD WATCH REMAINS IN EFFECT TODAY FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHEAST INDIANA. IF YOU LIVE ALONG SMALL STREAMS AND LOW LYING AREAS PRONE TO FLOODING BE ALERT FOR FLOODING CONDITIONS TODAY. AS THE LOW PRESSURE CENTER PASSES THROUGH ILLINOIS COLDER AIR WILL HELP CHANGE THE RAIN TO SNOW. THE CHANGEOVER WILL BEGIN BY LATE AFTERNOON OR EVENING. AT FIRST THE RAIN WILL BE MIXED WITH WET SNOW BUT AS TEMPERATURES CONTINUE TO FALL THE RAIN WILL CHANGE TO ALL SNOW. SNOWFALLJ AMOUNTS OF 3 TO 5 INCHES ARE EXPECTED BEFORE THE SNOW ENDS LATE TONIGHT AND EARLY SATURDAY. SOMREK
Special weather statement, Feb 21, 6:00 AM CST, 2 hours 14 minutes before
ILZ003>006-008-010>014-019>023-032>033-039-INZ001-211700- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO IL 600 AM CST FRI FEB 21 1997 FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND LAKE COUNTY INDIANA A LOW PRESSURE SYSTEM IN THE SOUTHERN PLAINS WILL MOVE NORTHEAST TO ILLINOIS TODAY. AN EXTENEDED PERIOD OF RAIN WILL ACCOMPANY THE SYSTEM AS IT APPROACHES NORTHERN ILLINOIS. THE RAIN MAY BE HEAVY AT TIMES AND WILL POSE A THREAT OF FLOODING. A FLOOD WATCH REMAINS IN EFFECT TODAY FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHEAST INDIANA. IF YOU LIVE ALONG SMALL STREAMS AND LOW LYING AREAS PRONE TO FLOODING BE ALERT FOR FLOODING CONDITIONS TODAY. AS THE LOW PRESSURE CENTER PASSES THROUGH ILLINOIS COLDER AIR WILL HELP CHANGE THE RAIN TO SNOW. THE CHANGEOVER WILL BEGIN BY LATE AFTERNOON OR EVENING. AT FIRST THE RAIN WILL BE MIXED WITH WET SNOW BUT AS TEMPERATURES CONTINUE TO FALL THE RAIN WILL CHANGE TO ALL SNOW. SNOWFALL AMOUNTS OF 3 TO 5 INCHES ARE EXPECTED BEFORE THE SNOW ENDS LATE TONIGHT AND EARLY SATURDAY. SOMREK
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 8:14 AM CST | Flash Flood Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 4 hr |
| Feb 21, 8:32 AM CST | Flash Flood Warning | LOT | Cook, DeKalb, DuPage, Kane, Kendall, McHenry and 1 more | 3 hr |
| Feb 21, 8:32 AM CST | Flash Flood Warning | LOT | Grundy, LaSalle, Lee, Livingston | 3 hr |
| Feb 21, 8:32 AM CST | Flash Flood Warning | LOT | Ford, Iroquois, Kankakee | 3 hr |
| Feb 21, 8:32 AM CST | Flash Flood Warning | LOT | Boone, Ogle, Winnebago | 3 hr |
| Feb 21, 8:32 AM CST | Flash Flood Warning | LOT | Lake | 3 hr |
| Feb 21, 11:35 AM CST | Flash Flood Warning | LOT | Grundy, Kankakee, Livingston | 6 hr |
| Feb 21, 11:35 AM CST | Flash Flood Warning | LOT | Boone, Winnebago | 6 hr |
| Feb 21, 11:35 AM CST | Flash Flood Warning | LOT | DuPage, Kane, Kendall, Will | 6 hr |
| Feb 21, 11:35 AM CST | Flash Flood Warning | LOT | Cook, Lake, McHenry | 6 hr |
| Feb 21, 11:35 AM CST | Flash Flood Warning | LOT | DeKalb, LaSalle, Lee, Ogle | 6 hr |
Nearby
Flash Flood Warnings in Illinois, 1997Every flash flood warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.