Alert archive / Illinois / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 73, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Jul 7, 1991, 4:20 PM CDT for DeKalb County, Lee County, Illinois. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Jul 7, 1991, 4:20 PM CDT (21:20 UTC)
- Expired
- Jul 7, 1991, 5:00 PM CDT
- In force
- 40 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties DeKalb County, IL, Lee County, IL
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.3 hours before the alert went out and 305 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1805 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -67 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm 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, Jul 7, 1:38 PM CDT, 2 hours 42 minutes before
ILZ005-006-007-009-080200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 140 PM CDT SUN JUL 7 1991 ...TEMPERATURES ACROSS THE HEART OF ILLINOIS ARE RISING INTO THE MID 90S WITH HIGH HUMIDITY... HIGH TEMPERATURES TODAY IN THE PEORIA AREA AS WELL AS MUCH OF THE HEART OF ILLINOIS ARE EXPECTED TO RISE INTO THE MID TO UPPER 90S ALONG WITH HIGH HUMIDITY. THIS COMBINATION WILL MAKE IT FEEL MUCH HOTTER. THIS AFTERNOONS HEAT INDEX WILL RANGE FROM 100 TO POSSIBLY 107 DEGREES...IN SHADY AREAS. THESE HEAT INDEX VALUES COULD BE DANGEROUS TO PEOPLE PARTICIPATING IN OUT OF DOORS ACTIVITIES. PROLONGED EXPOSURE OR PHYSICAL ACTIVITIES TO THE HEAT SHOULD BE REDUCED OR EVEN ELIMINATED. PROTECTION OF PETS AND SMALL LIVESTOCK SHOULD ALSO BE PROTECTED FROM THE HEAT. IF YOU ARE OUT DOORS...DRINK PLENTY OF NON ALCOHOLIC BEVERAGES... EVEN IF YOU DON'T FEEL THIRSTY. WEAR LIGHTWEIGHT...LIGHT COLORED CLOTHING. ELDERLY PERSONS...SMALL CHILDREN...CHRONIC INVALIDS...AND PEOPLE ON CERTAIN MEDICATIONS OR DRUGS ARE MORE SUSCEPTABLE TO HEAT DISORDERS. TOO MUCH HEAT CAN CAUSE...SUNBURN...HEAT CRAMPS...HEAT EXHAUSTION...AND HEAT STROKE. HEAT STROKE IS A SEVERE MEDICAL EMERGENCY. SUMMON EMERGENCY MEDICAL ASSISTANCE OR GET THE VICTIM TO A HOSPITAL IMMEDIATELY. DELAY CAN BE FATAL. REMEMBER...THE HEAT INDEX WAS DEVISED FOR SHADY...LIGHT WIND CONDITIONS. EXPOSURE TO FULL SUN CAN INCREASE HEAT INDEX VALUES BY UP TO 15 DEGREES. STUMETZ
Special weather statement, Jul 7, 1:45 PM CDT, 2 hours 35 minutes before
ILZ005-006-007-009-080200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 140 PM CDT SUN JUL 7 1991 ...TEMPERATURES ACROSS THE HEART OF ILLINOIS ARE RISING INTO THE MID 90S WITH HIGH HUMIDITY... HIGH TEMPERATURES TODAY IN THE PEORIA AREA AS WELL AS MUCH OF THE HEART OF ILLINOIS ARE EXPECTED TO RISE INTO THE MID TO UPPER 90S ALONG WITH HIGH HUMIDITY. THIS COMBINATION WILL MAKE IT FEEL MUCH HOTTER. THIS AFTERNOONS HEAT INDEX WILL RANGE FROM 100 TO POSSIBLY 107 DEGREES...IN SHADY AREAS. THESE HEAT INDEX VALUES COULD BE DANGEROUS TO PEOPLE PARTICIPATING IN OUT OF DOORS ACTIVITIES. PROLONGED EXPOSURE OR PHYSICAL ACTIVITIES TO THE HEAT SHOULD BE REDUCED OR EVEN ELIMINATED. PROTECTION OF PETS AND SMALL LIVESTOCK FROM THE HEAT IS ALSO ADVISED. IF YOU ARE OUT DOORS...DRINK PLENTY OF NON ALCOHOLIC BEVERAGES... EVEN IF YOU DON'T FEEL THIRSTY. WEAR LIGHTWEIGHT...LIGHT COLORED CLOTHING. ELDERLY PERSONS...SMALL CHILDREN...CHRONIC INVALIDS...AND PEOPLE ON CERTAIN MEDICATIONS OR DRUGS ARE MORE SUSCEPTABLE TO HEAT DISORDERS. TOO MUCH HEAT CAN CAUSE...SUNBURN...HEAT CRAMPS...HEAT EXHAUSTION...AND HEAT STROKE. HEAT STROKE IS A SEVERE MEDICAL EMERGENCY. SUMMON EMERGENCY MEDICAL ASSISTANCE OR GET THE VICTIM TO A HOSPITAL IMMEDIATELY. DELAY CAN BE FATAL. REMEMBER...THE HEAT INDEX WAS DEVISED FOR SHADY...LIGHT WIND CONDITIONS. EXPOSURE TO FULL SUN CAN INCREASE HEAT INDEX VALUES BY UP TO 15 DEGREES. STUMETZ /CORRECTION TO WORDING/
Special weather statement, Jul 7, 3:36 PM CDT, 44 minutes before
ILZ005-072200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 335 PM CDT SUN JUL 7 1991 ...TORNADO WATCH UNTIL 10 PM CDT FOR NORTHERN ILLINOIS WHICH INCLUDES BUREAU AND PUTNAM COUNTIES... AT 330 PM CDT NO SHOWERS OR THUNDERSTORMS WERE INDICATED NEAR OR IN BUREAU AND PUTNAM COUNTIES. POSSIBLE TORNADOES AND SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOPE ALONG A COLD FRONT MOVING SOUTHEAST FROM IOWA THIS EARLY AFTERNOON AND EVENING4. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL NEWS MEDIA FOR FURTHER WATCH INFORMATION OR WARNINGS THAT MAY BE REQUIRED. ATTN ISP DIST 17 STUMETZ
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 5:32 AM CDT | Severe Thunderstorm Warning | ILX | DeKalb, Ogle | 43 min |
| Jul 7, 4:03 PM CDT | Tornado Warning | ILX | Boone | 19 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1991Every severe thunderstorm warning in 1991
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.